http://hdl.handle.net/2440/14760 2013-05-22T04:39:28Z 2013-05-22T04:39:28Z Doube, Katherine http://hdl.handle.net/2440/77910 2013-05-22T01:30:12Z 2010-12-31T13:30:00Z

Title: 'Hidden’ Author: Doube, Katherine Abstract: ‘Hidden’ is a novel exploring ideas of secrecy, self-presentation and what it means to be an artist. The two main characters are Jemima, an art student at university, and Clement. They meet at a party when Clement walks in on Jemima cutting herself. Something about Jemima reminds Clement of his sister, Hannah, who died as a result of her anorexia. Jemima is intrigued by Clement’s reaction to her cutting and finds herself drawn to the only person who knows her secret. While she finds comfort in the fact he knows something she keeps hidden, and the space of intimacy this creates, she refuses to participate actively in that intimacy, keeping him, emotionally, at an arm‘s length. Clement and Jemima travel separately to Barcelona. Clement visits before the start of the novel and returns early when Hannah is readmitted to hospital. Clement remembers Barcelona in a twist of pleasure and pain. It is where he found his artistic voice and where he felt free as an artist for the first time. At the same time, however, he feels that he deserted Hannah for art, represented by Barcelona. Since his sister‘s death, Clement has become ‘anorexic’ about art. In an attempt to control something in this uncontrollable world, he avoids seeing or creating art. Jemima, perplexed by Clement’s feelings about Barcelona and knowing nothing of Hannah, thinks that by going there she‘ll be able to connect with him, without the risk of real intimacy. At the same time, travelling alone to Barcelona appeals to Jemima as a way to escape their burgeoning relationship. In Barcelona she discovers that she will always be herself no matter where she goes. She also finds her own way of thinking about art and what it means to be an artist – very different from Clement’s. ‘Looking in a Broken Mirror: Reflections on the Split Writer and the Visual Artist Character’ is the exegesis for ‘Hidden‘. The exegesis explores the idea of split or doubled artists, looking specifically at the relationship between writer-artist and fictional character-artist. It is argued that writing about a fictional artist can be a way of exploring the creative process and the relationship between artist (writer) and artwork (novel). Margaret Atwood‘s novel Cat’s Eye is discussed as exploring a possible relationship between the artist, her life and her art. Other novels about visual artists are also discussed in relation to ‘Hidden’. The creative process and the experience of research for this project are examined, specifically in relation to the split or doubled relationship between life and art and the split between rational and creative thinking. Gaudí’s architecture, in the city of Barcelona, is considered in these contexts as a significant influence in the development of the novel.

2010-12-31T13:30:00Z Syjuco, Miguel http://hdl.handle.net/2440/77856 2013-05-20T06:30:40Z 2010-12-31T13:30:00Z

Title: Ilustrado. Author: Syjuco, Miguel Abstract: The novel, Ilustrado, and this exegesis Autoplagiarist, seek to create a clear understanding of the development, challenges and limitations of Philippine literature, with a focus on its fiction in English, and its relationship with Philippine society. They seek to demonstrate: that Philippine literature in English (PLE) is as Filipino as writing in the native languages; that in today’s world a novel can, and in many cases should, be rich enough to appeal to a local and international audience; and that Ilustrado fits comfortably within that tradition and points a way forward. Ilustrado, the novel, was written expressly with the issues of Philippine literature and society in mind and addresses questions of authenticity, relevance, language, thematic recurrence, meta-narrative and the current place of PLE in international writing. Autoplagiarist, the exegesis, looks briefly at Philippine history and the societal forces that have acted on its culture, surveys Philippine literature with a focus on writing in English, examines the tradition and Ilustrado’s place within it and finishes with a discussion of the novel Ilustrado and the creative issues it sought to address. Research and analysis conducted for Ilustrado and Autoplagiarist yielded clear patterns exhibiting the enduring effects of social and historical events upon the development of PLE. Further, recurring themes and issues Filipino writers regularly address in their work became apparent. From these, possible pathways into the future were posited for a tradition often weighed down by its past. This thesis argues that inertia and rootedness have come about through the literary tradition’s preoccupation with authenticity, nationalism, causality, didacticism and angst. It also attempts to demonstrate how Ilustrado faced these challenges within the novel’s implicit and explicit exploration of structure, verisimilitude, scope and the recurring themes that persistently characterise the Philippine novel in English.

2010-12-31T13:30:00Z Ibrahim, Mohammad Nizam http://hdl.handle.net/2440/77855 2013-05-22T00:15:59Z 2011-12-31T13:30:00Z

Title: Performance evaluation of measurement algorithms used in IEDs. Author: Ibrahim, Mohammad Nizam Abstract: Many Intelligent Electronic Devices (IEDs) are available for the protection of power systems. These IEDs use a series of mathematical algorithms for fault detection and execute various protection functions. The first and essential mathematical algorithm of any IED is the measurement algorithm. The aim of the measurement algorithm is to estimate the fundamental frequency component (phasor) of input current and voltage signals. Most protection algorithms use the estimated phasor for their executions. The most important factors for the successful use of the protection algorithms in IEDs are accuracy and speed of the phasor estimation by the measurement algorithms. A fault in a power system produces step changes in the current and voltage phasors recorded by IEDs as well as a variety of nuisance signals. The nuisance signals introduce significant input distortions to measurement algorithms. Measurement algorithms that estimate the fundamental frequency phasor component from the distorted input signals produce some errors. Different measurement algorithms produce different amounts of error. This is because their design is based on different approaches with different assumptions that result in different performance in the presence of nuisance signals. It is important to evaluate the performance of measurement algorithms in the presence of nuisance signals. The evaluation is to ensure that measurement algorithms estimate the fundamental frequency component at the required design accuracy and speed. The result of the performance evaluation can be used to select appropriate measurement algorithms for specific protection applications. However, the parameters of nuisance signals are uncertain due to their dependence on unpredictable factors such as fault location and fault impedance. Thus, a methodology for the evaluation of measurement algorithm performance should take into account the uncertainty of the parameters of nuisance signals. The traditional method of evaluating the performance of measurement algorithms is based on the local sensitivity method using a linear function approximation at a nominal point. The local sensitivity method varies only a single nuisance parameter (factor) while other factors are fixed at their nominal values. The studied factor is varied to observe errors in the output of the measurement algorithm. Such an approach, however, does not provide the overall performance of measurement algorithms. Besides, varying the single factor does not represent realistic scenarios. This thesis proposes a new methodology to evaluate the performance of measurement algorithms implemented in IEDs. The proposed methodology uses the global uncertainty and sensitivity analysis method. In this method, all factors representing nuisance components are varied simultaneously. Uncertainty analysis measures the uncertainty in output of the measurement algorithm due to the uncertainty of input factors. Sensitivity analysis measures the contribution of all factors and their interactions to output uncertainty. In general, the global uncertainty and sensitivity method that is based on the Monte Carlo approach requires extensive evaluations. Its implementation can be prohibitive, particularly in practical testing, because the number of factors is large. Thus, a two-stage methodology with a significantly smaller number of evaluations is used. The first-stage is the use of the Morris method as a preliminary (screening of factors) sensitivity analysis and the second-stage is the implementation of the Extended Fourier Amplitude Sensitivity Test (EFAST) technique for comprehensive global uncertainty and sensitivity analysis. A single evaluation involves one run of the IED injection test which can take a few minutes. Thus, it is justifiable to search for the methodology that is uses the smaller number of evaluations. The proposed methodology contributes to an automated testing method integrating ATP/EMTP, MATLAB and SIMLAB programs as well as the injection test facility. The ATP/EMTP program is used to generate fault test scenarios. The MATLAB program is used to model elements of the IED to calculate performance indices on the output of measurement algorithms and automatically control the process of extensive evaluations (simulations). The main role of the SIMLAB is to analyze the uncertainty and sensitivity of the measurement algorithms outputs. The proposed methodology has been demonstrated by evaluating the performance of a known measurement algorithm in simulation and an unknown measurement algorithm of a commercial IED (SEL-421). The methodology has been successfully performed in the simulation as well as in practical testing. The results of the analysis indicate that the performance is typically most sensitive to a few parameters out of many possible factors. These important parameters should then be the focus of research for the optimization of measurement algorithms.

2011-12-31T13:30:00Z Balzan, Luke Anthony http://hdl.handle.net/2440/77835 2013-05-20T04:23:04Z 2011-12-31T13:30:00Z

Title: Signal processing and optimisation of MIMO radar. Author: Balzan, Luke Anthony Abstract: This thesis presents a background to and a series of interesting and novel results for a particular proposed model for narrowband MIMO radar systems. The proposed model is both novel and unique, comprising closely-spaced antenna arrays that transmit orthogonally-coded waveforms, and can be seen as a logical extension to existing models for conventional single-input, single-output radar systems. Signal processing and optimisation is performed on the proposed system with a view to yield enhanced estimation and tracking performance. The proposed signal and likelihood estimation models have been thoroughly defined, with a number of important approximations and simplifications to the models gained through the use and exploitation of orthogonally-coded waveforms. All approximations and assumptions have been justified through the use of simulated examples. The Cramer-Rao bound for the models is derived and verified as correct through the use of simulated data. Through comparison of the Cramer-Rao bound to statistical estimation variances obtained through extensive simulations, the proposed models are shown to be efficient, thereby demonstrating the validity of the bound to be used as performance metric for optimisation. With the knowledge that the proposed MIMO radar system is efficient, the Cramer-Rao bound is used as a measure for estimation performance optimisation. The bound is seen to be dependent on the choice of orthogonally-coded waveforms used in the MIMO radar system, and by framing the selection of codes as a convex optimisation problem, codes can be chosen to minimise the Cramer-Rao bound, and since the system has been shown to be efficient, this also reduces estimate variance, thus improving the estimation performance of the system. This optimisation problem has been examined and simulated extensively, with simulated data substantiating the claims of performance improvement. Finally, this thesis explores the idea of tracking for MIMO radar. A Kalman filter based tracker is proposed and simulated for the MIMO radar system. Extending the convex optimisation scheme discussed above, a similar optimisation problem is formed for the case of MIMO radar tracking. The optimisation problem has been simulated to select orthogonal codes for transmitting based on the predicted target motion, obtained from the Kalman filter tracker. By basing the optimisation on the predicted tracker outputs, an action-perception cycle for MIMO radar is established, where the system is able to adapt to its surroundings based on it’s current and predicted view of the environment. Simulations have been used to observe the performance improvements of implementing the optimisation scheme, and thereby showing the action-perception cycle for MIMO radar at work.

2011-12-31T13:30:00Z