Thesis (M.S.)--Brigham Young University. Dept. of Civil and Environmental Engineering, 2003. / Includes bibliographical references (p. 93-94).

No description available.

No description available.

No description available.

No description available.

Magnetically levitated microrobotic systems have shown a great deal of promise for micromanipulation tasks. A new large-gap magnetic suspension system has recently been developed at the University of Waterloo in order to develop microrobotic systems for various applications. In order to achieve motion with the system, a model is needed in order to facilitate the design of various aspects of the system, such as the microrobot and the controller. In order to derive equations of motion for the system attempts were made to characterize the force produced by the magnetic drive unit in terms of a simple analytical equation. The force produced by the magnetic drive unit was estimated with the aid of a finite element model. The derived equations were able to predict the general trend of the force curves, and with sufficient parameter tweaking the error between the force estimated by the finite element model and the force estimated by the analytical equation could be minimized. System models describing the motion of the system in the horizontal and vertical directions are identified and compared to the actual system response. The vertical position response is identified through a least squares parameter estimate of the closed loop response combined with a partial reconstruction of the root locus diagram, with the model structure based on the known dynamics of a simplified form of magnetic levitation. This model was able to provide a reasonable prediction of the system response for a variety of PID controllers under a variety of input conditions. The horizontal models are identified using a least-squares parameter estimate of the open loop characteristics of the system. The horizontal models are able to provide a reasonable prediction of the system response under PD and PID control. Full spatial motion of a microrobot prototype is demonstrated over a working range of 20x22x30 mm³, with PID controller parameters and reference trajectories adjusted to minimize disturbances. The RMS error at steady state is on the order of 0. 020 mm for vertical positioning and 0. 008 mm for horizontal positioning. A linear quadratic regulator implemented for vertical position control was able to reduce the vertical position RMS error to 0. 014 mm.

No description available.

Use of modern traffic signal coordination has now been proved by its performance to reduce the total delay, increase driving speed and provide the smoothness of driving significantly. To provide more possibility of success in any traffic development including traffic signal coordination, traffic analytical and modelling software packages are now the best answer. This thesis illustrates the practical using of aaSIDRA and PARAMICS in development of traffic signal coordination on Sri-Jan Road, Khon Kaen City Thailand. The fixed-time signal plan with bandwidth maximization strategy is selected for the studied corridor. Two essential steps in the development are: determination of signal plans and cycle times using Version 2.1 aaSIDRA Micro-analytical software package; and determination of coordination offsets by using Version 5.1 PARAMICS Micro-simulation software package. The PARAMICS is also using in the evaluation of actual and improved traffic condition on Sri-Jan corridor. The results show that the newly proper signal plans and offsets produces significant improvements on the traffic conditions of the Sri-Jan Road. Recommendations on the motorcycle impacts and the projection of future traffic condition have also been provided for further study. / Thesis (MTransportSysEngineering)--University of South Australia, 2006.

Transport systems can be modelled and analysed with two techniques namely analytical and simulation. Until recently, aaSIDRA was the leader in the traffic modelling and analysis software based on analytical theory at micro scale. However, it cannot be used for more than one intersection. Meanwhile, the PARAMICS, AIMSUN NG and VISSIM are micro simulation software which are widely used in modelling and analysing transport systems. Further, CUBE Dynasim is also micro simulation software. It is created by Dynalogic in France and integrated in CUBE by Citilabs, UK. However, this software is relatively new compared to PARAMICS, AIMSUN NG or VISSIM. It is able to model multi nodes and multi modals transport system. The version of software used in this research is CUBE Dynasim 1.4.9 released in 2004 aaSIDRA 2.0 version 2.0.0.205. / Thesis (MTransportSysEngineering)--University of South Australia, 2005.

This thesis examines the role of management accounting control practices in interorganisational alliances (IOAs) involving non-cash, ‘value in kind’ (VIK) transactions. The research involves a retrospective case study of the Sydney 2000 Olympic Games, which examines how the Sydney Organising Committee for the Olympic Games, (SOCOG), managed and accounted for over $360 million of VIK. The case study is based on document study and interviews with individuals involved with this aspect of the 2000 Olympic Games. Following a review of previous research concerning both the life cycle (Das and Teng 2002, Moores and Yuen 2001) and the nature of formal accounting controls (Dekker 2004) in IOAs, two research questions are developed. Firstly, what kinds of formal accounting controls are required to manage VIK over the life cycle of an IOA? Secondly, how are extant accounting controls localised through the practice of managing VIK? This thesis finds the VIK resources are significant to the recipient parties and the IOAs in general. These VIK transactions, however, have been overlooked in previous accounting research with little significant recognition in prior studies or contemporary professional discourse. There is a lack of directly transferable expertise from traditional accounting practices in relation to the following aspects of the management and control of VIK – recognition, planning/budgeting, procedures/rules and performance monitoring. Formal control activities were all experimented with and improvised in order to deal with the challenges presented by the significance of VIK. A ‘drift’ in accounting technologies has been documented by this study (Andon et al 2007). Given the potential economic significance of VIK transactions, this suggests a need for both further research and professional discourse in this area to ensure sufficient visibility of, and management planning and control for, VIK transactions. Future research could include studies of: management and control of VIK in real time; provider organisations and the impact of VIK on their formal accounting controls; the role of social or informal controls and trust in negotiating and managing VIK; IOAs involving organisations that are operated as an indefinite going concern and, the recognition, valuation and attestation of VIK resources across a range of organisations.