This study was commissioned to examine the applied leadership styles that foster organisational commitment and product quality commitment levels of two groups of employees working at two different business units of same private sector steel manufacturing company in Gauteng. The samples included 226 production employees from business unit ‘A’ and 190 production employees from population ‘B’. The combined sample of 416 included 83 managers and 333 low level employees. Leadership style data was collected through the Multi-Factor Leadership Questionnaire (MLQ) from the managers and Organisational and Product Quality data was gathered through the Employee Questionnaire (EQ). The MLQ measured nine constructs of the Full Range Leadership Theory while the EQ measured four constructs of identification, affiliation, exchange and product quality commitment levels among lower level employees. A total of 416 questionnaires were distributed and 274 were received. The data was analysed statistically to define the leadership styles, the levels of organisational and product quality commitment and come up with correlations. It was found that transformational and transactional leadership styles were predominant at both business units. Laissez-faire style was also being used at business unit ‘A’. The leadership styles were found to be below the ideal levels for effective leadership. Leaders were perceived to be active managers and not leaders. The organisational and product quality commitment levels among employees were found to be marginal at both units. The top leadership styles and commitment levels trended the same and scored closely for both business units with small variations. The results were comparable. Positive correlations were found between identification commitment (0.305 for ‘A’ and 0.481 for ‘B’) and product quality commitment among employees. It was concluded from the correlations that the higher the levels of organisational commitment, the higher the levels of product quality commitment among employees. By statistical averages, it was concluded that higher levels of transformational leadership fosters higher levels of identification commitment and product quality commitment among employees. Demographics affected the way the respondents answered the questions. A leadership model complete with recommendations was proposed with the intention of increasing leadership effectiveness in order to positively impact and foster product quality commitment among employees. / MBA, North-West University, Potchefstroom Campus, 2014

The purpose of this study was to examine the phenomenon of resilience by means of a literature review (to obtain a theoretical view) and empirical research, particularly to understand why some adolescents with Intellectual disability (ID) were resilient. Firstly, my motivation was curiosity (as teacher of many years of adolescents with ID) about why some youths coped better with the daily challenges that ID brought than some of their peers with ID. Secondly, there was a gap in the existing literature. Although there were studies that, among others, reported the rights of adolescents with ID to quality service provision, the risks that they and their parents/caregivers could expect daily, and challenges and coping skills for teachers/parents and caregivers who worked with these learners every day, I could not locate any South African studies, and only five international studies, that reported the protective resources/processes in adolescents with ID. The purpose of the study was to hear the voices of the adolescents themselves regarding what they, from the reality/context of their life-world, viewed as that which supported them, intrinsically as well as extrinsically, towards resilience. I also asked the teachers (as secondary informants) who worked with the adolescents with ID every day to complete a questionnaire about what (risks as well as protective resources), in their opinion, had an influence on the resilience of these adolescents with ID. I did this qualitative case study with the help of 24 primary informants (that is, adolescents with ID) who all attended schools for the physically and severely intellectually disabled in Gauteng province, South Africa, and 18 of their teachers. On account of the limited literacy of the adolescents with ID, I used a visual participatory research method, namely, draw-and-talk. This involved the primary informants drawing what made them “strong” in life. This was followed by informal conversations where the adolescent informants explained what they had drawn and why. The findings of this study were in agreement with existing literature that reported that resilience was a dynamic, socio-ecological, transactional process between the adolescent with ID (obtaining and using protective resources) and his/her surrounding environment (the ability of the community to supply these resources that could serve the adolescent with ID as buffer against daily risks). The findings included previously non-reported protective processes, namely a supportive social ecology that treated the adolescent as an agentic being (providing opportunities for socially appropriate choices and dreams for the future after school life) and the importance of providing safe spaces for adolescents with ID to be nurtured (children’s homes and/or school hostels). The study also considered what resilience processes there were in the currently existing schools for the physically and severely intellectually disabled. These considerations were aimed at teachers with the hope that they would support teachers and schools to support the adolescent with ID towards resilience. In summary, the study hoped to capacitate teachers, parents, and caregivers to better understand the adolescent with ID and to be aware of how they could support the youth to be resilient. / MEd (Learner Support)--North-West University, Vaal Triangle Campus, 2015

This study was commissioned to examine the applied leadership styles that foster organisational commitment and product quality commitment levels of two groups of employees working at two different business units of same private sector steel manufacturing company in Gauteng. The samples included 226 production employees from business unit ‘A’ and 190 production employees from population ‘B’. The combined sample of 416 included 83 managers and 333 low level employees. Leadership style data was collected through the Multi-Factor Leadership Questionnaire (MLQ) from the managers and Organisational and Product Quality data was gathered through the Employee Questionnaire (EQ). The MLQ measured nine constructs of the Full Range Leadership Theory while the EQ measured four constructs of identification, affiliation, exchange and product quality commitment levels among lower level employees. A total of 416 questionnaires were distributed and 274 were received. The data was analysed statistically to define the leadership styles, the levels of organisational and product quality commitment and come up with correlations. It was found that transformational and transactional leadership styles were predominant at both business units. Laissez-faire style was also being used at business unit ‘A’. The leadership styles were found to be below the ideal levels for effective leadership. Leaders were perceived to be active managers and not leaders. The organisational and product quality commitment levels among employees were found to be marginal at both units. The top leadership styles and commitment levels trended the same and scored closely for both business units with small variations. The results were comparable. Positive correlations were found between identification commitment (0.305 for ‘A’ and 0.481 for ‘B’) and product quality commitment among employees. It was concluded from the correlations that the higher the levels of organisational commitment, the higher the levels of product quality commitment among employees. By statistical averages, it was concluded that higher levels of transformational leadership fosters higher levels of identification commitment and product quality commitment among employees. Demographics affected the way the respondents answered the questions. A leadership model complete with recommendations was proposed with the intention of increasing leadership effectiveness in order to positively impact and foster product quality commitment among employees. / MBA, North-West University, Potchefstroom Campus, 2014

ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California / This paper describes the concept of wide-angle coverage optical vision system integrated with guidance support of microwave or acoustical imaging arrays. The objective is to provide the capability of effective high-resolution full-view monitoring and sensing. The optical component, formed by a multi-camera array, is responsible for the main interface with human users. The acoustical and microwave arrays are integrated, allowing the system to function in the event-triggered modality for optimal efficiency. In this paper, the arrays discussed are in circular configurations. With minor modification, the system can also function with linear array configurations.

ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada / This paper introduces a study of the feasibility and initial hardware design for transmitting data over aircraft power lines. The intent of this design is to significantly reduce the wiring in the aircraft instrumentation system. The potential usages of this technology include Common Airborne Instrumentation System (CAIS) or clock distribution. Aircraft power lines channel characteristics are presented and Orthogonal Frequency Division Multiplexing (OFDM) is introduced as an attractive modulation scheme for high-speed power line transmission. A design of a full-duplex transceiver with accurate frequency planning is then discussed. A general discussion of what communications protocols are appropriate for this technology is also provided.

Ti-6Al-4V has a wide range of applications such as in the automotive and aerospace industries. Nevertheless, titanium alloys are very difficult to machine by conventional methods. Micro-EDM is a non-conventional machining method that uses the thermal effect of precisely controlled sparks. Manufacturers are looking for the methods and optimal settings to increase the productivity of micro-EDM in terms of lessening machining time and tool wear. Moreover, surface integrity of the machined area is crucial for some products such as biomedical implants. The objective of this study was to investigate the effects of the micro-EDM process parameters on response variables, in order to understand the behavior of each parameter as well as to determine their optimal values. Although, there is a substantial amount of literature studying different aspects of micro-EDM, most of them were designed based on the one-factor-at-a-time experiments instead of studying all factors, simultaneously. This research was conducted through a series of experiments using a full factorial design. An analysis of variance was employed to analyze the findings and to determine the effect and significance of each process parameters on the response variables. The process parameters included voltage, capacitance, electrode rotational speed, and electrode coating. Voltage and capacitance were studied separately as well as in combination in terms of the discharge energy. Response variables consisted of machining time, tool wear, crater size, microhardness, and element characterization. The surface morphology and element characterization were studied through the application of SEM and EDS analysis. The findings indicated that voltage had a decreasing effect on machining time, while it increased the crater size. Capacitance decreased machining time and tool wear. It had an increasing effect on the surface hardness. The effects of the TN-coating and electrode rotational speed were not statistically significant. Voltage and capacitance were the only parameters affecting element characterization. The affected elements included Ti, Al, C, and W. The optimal process parameters for two sets of response variables were determined using Minitab 17.

International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / A recent Air Traffic Management (ATM) initiative has reduced certain oceanic routes from a 2,000-foot vertical separation minimum to a 1,000-foot (300 m) separation minimum between flight levels of 29,000 feet and 41,000 feet. As a result of this initiative, an aircraft transitioning from the Continental United States (CONUS) to Europe or Asia will be required to have a validated, certified altimeter reporting system within the specified tolerances. The aging military airframes are not currently Reduced Vertical Separation Minimum (RVSM) certified. The impact on military deployment time to foreign theatres as well as high- fuel cost makes this a high-priority DoD issue. This paper describes the test and evaluation (T&E) challenge, viable solutions and test method for meeting the RVSM requirements in an approved, affordable, and least down-time (minimal aircraft modification) manner. The test method described herein utilizes a PACER aircraft in formation with the RVSM candidate aircraft. The RVSM is just one of the many Global Air Traffic Management (GATM) requirements which must be met for military aircraft to fly within premium airspace during overseas deployment. The commercial equivalent of GATM is Communications Navigation and Surveillance/Air Traffic Management (CNS/ATM). Our focus will be on meeting the RVSM certification requirements as related to the test environment.

GMAW (Gas Metal Arc Welding) is one of the most important arc welding processes being adopted in modern manufacturing industry due to its advantages in productivity, energy efficiency and automation. By monitoring and improving some of the important properties of GMAW such as production rate, metal transfer and base metal heat input, researchers could bring the process efficiency and stability to a new level. In recent years, some innovative modifications of GMAW such as Twins, Tandem and laser-MIG hybrid welding have been adopted into many industrial applications for better productivity. In this dissertation, a novel GMAW called DB-GMAW (Dual Bypass Gas Metal Arc Welding) using two GTAW torches and one GMAW torch to construct a welding system, is proposed and developed. In DB-GMAW, two GTAW torches perform the bypass system which decouples the total welding current into base metal current and bypass current after the melt down of filler wire. Compared to conventional GMAW, DB-GMAW has many advantages in droplet formation, base metal heat input and penetration achievement due to its unique characteristics in welding arc and current flow. In the first place of the research, experimental system of DB-GMAW is constructed. Then, sufficient experiments under different parameters are performed to provide us a good understanding of the behaviors and characteristics of this novel GMAW process. Observation about metal transfer formation and base metal heat input is studied to verify its theoretical analysis. Full penetration of work piece via DB-GMAW is achieved based on a series of parameter testing experiments. Moreover, image processing techniques are applied to DB-GMAW to monitor the welding process and construct a feedback system for control. Considering the importance of maintaining stable full penetration during many welding applications, a nonlinear model of DB-GMAW full penetration is developed in this dissertation. To do that, we use machine vision techniques to monitor the welding profile of the work piece. A control algorithm based on the nonlinear model using adaptive control technique is also designed. The achievement of this dissertation provides a fundamental knowledge of a novel welding process: DB-GMAW, and a good guidance for further studies about DBGMAW.

The goal of this thesis is to develop more effective quantitative procedures to evaluate the stability of deteriorated metal culverts and a better understanding of the deteriorated culverts' behaviour through non-destructive testing, full scale experiments and numerical analyses. First, three design cases were examined using numerical analysis to study the effects of corrosion, burial depth and staged construction on the capacity of deteriorated steel culverts. Then, a method to measure the remaining wall thickness of two 1.8 m diameter corroded metal culverts using ultrasonic device was developed. Both culverts were then buried in the test pit at Queen's University and tested under nominal and working vehicle loads at 0.9m cover and 0.6m cover. The more heavily corroded structure (CSP1) was tested up to its ultimate limit state, inducing local bending across the crown, as well as local buckling of the remnants of the corrugated steel wall between perforations at the haunches. The results suggest that the single axle pads interact to influence the culvert's behaviour despite the shallow cover used in these experiments. CSP1 was able to carry the working load and did not fail until reaching 340 kN, which was equal to 90% of the fully factored load. The experiment suggests that less deteriorated metal culverts (as compared to CSP1) may have the required capacity. Two finite element packages, CANDE and ABAQUS, were used to perform the numerical investigation and the AASHTO and CHBDC approaches were then used to calculate the thrust force in the culverts. Although the numerical analysis produced conservative values for the thrust forces, it failed to capture the non-linear behaviour of both specimens in the experiments. Both the AASHTO and the CHBDC approaches produced unconservative thrust forces compared to experimental results while numerical analysis using Moore's spreading factor produced the most conservative results in terms of thrust. The analysis suggests that CANDE could be used to predict thrust forces in less deteriorated metal culverts. A procedure to assess the stability of deteriorated corrugated metal culverts based on quantitative data was developed using the numerical analysis and experimental results. / Thesis (Master, Civil Engineering) -- Queen's University, 2013-01-30 12:56:17.945

The primary objective of this study was to investigate mould growth resistance of different types of wood products which include the sheathing and framing within full scale wall assemblies. Secondary objectives were to investigate the difference in mould growth resistance between borate-treated and untreated wood products as well as provide information about mould growth under different temperature and humidity conditions for treated and untreated wood products. <br /><br /> The objective of the study is to better understand mould growth, and to examine the effects of varying high moisture conditions on wooden products and the mould growth which may result. More importantly this will be examined on full scale wall assemblies; to date mould growth studies have only been performed within a laboratory on small samples of materials. Moreover, this study recreates the conditions which evidently cause mould growth on full scale wall assemblies. Tests were performed within a climate chamber on three full scale wall assemblies. The original scope of this study included an examination of the sheathing and framing components within a full scale wall assembly, however this study will focus mainly on the sheathing. <br /><br /> Results of this study indicate that the relative humidity conditions needed for mould growth on wood are higher than originally believed (i. e. , significantly greater than 80%RH). During the first eight weeks of test number one the relative humidity at the surface of the sheathing was held constant at 95% and little mould growth was observed on the untreated sheathing (mould growth index of 3 or less); little or no mould growth on the treated sheathing (mould growth index of 1 or less). The second and third tests demonstrated that the presence of liquid water greatly accelerated the time to germinations, the amount of mould growth (up to a mould growth index of 6), and the rate of mould growth. All three tests clearly showed that borate-treatment reduced the amount of mould growth; however, the concentration of borate-treatment, and the types of materials treated, does affect the resistance of mould growth. Furthermore, there was some evidence to suggest Borate treatments of the plywood increased the time to germination significantly, from a few weeks to 16 weeks in this study, but once mould growth was initiated, the rate of mould growth was similar to that of the untreated plywood. Two mathematical models to determine mould growth were examined: Viitanen and WUFIBIO (Sedlbauer). Viitanen?s model predicted time to germination and rate of growth rate well for untreated plywood, and WUFIBIO predicted time to germination but not the growth rate. It was also found both models err on the side of caution in predicting mould growth. <br /><br /> Recommendations include improvements to the test method and producers, and for future work.