http://espace.library.uq.edu.au/ The University of Queensland en Fez http://blogs.law.harvard.edu/tech/rss http://espace.library.uq.edu.au/view/UQ:182317 Central sleep apnoea (CSA) is a respiratory event where cessation of breathing effort and airflow occurs. Numerous lumped models have related the physical phenomena in the arterial tree to properties of the arterial wall. However, a limited model is available that describes pulse transit time (PTT) oscillations during CSA and tidal breathing. Data from 28 children (22 males; aged 6.2 ± 3.6 years) were obtained during overnight polysomnography. Using a lumped-element model, PTT fluctuations during both respiratory events were described and compared with actual experimental data. 222 valid CSA and 222 tidal breathing events were acquired and analysed. For the tidal breathing, undamped PTT oscillations of 3.89 s were predicted while actual data showed a mean value of 3.68 ± 0.83 s. Conversely, a damped PTT trend was observed during CSA as predicted by the model. The results attained showed that clustered CSA occurrences led to an increase of 7.23 ± 3.34 per cent in PTT baseline value while the model predicted 7.86 ± 2.63 per cent. The marginal increase in PTT baseline was expected since the blood pressure and heart rate decreased during such occurrences. The findings herein suggest that the described model has the potential to describe respiratory event characteristics of a sleeping child. 2009-09-03T09:22:26Z Foo, J. Y. A. og Wilson, S. J. og Lim, C. S. http://espace.library.uq.edu.au/view/UQ:173005 It has been previously demonstrated that systems based on local features and relatively complex statistical models, namely, one-dimensional (1-D) hidden Markov models (HMMs) and pseudo-two-dimensional (2-D) HMMs, are suitable for face recognition. Recently, a simpler statistical model, namely, the Gaussian mixture model (GMM), was also shown to perform well. In much of the literature devoted to these models, the experiments were performed with controlled images (manual face localization, controlled lighting, background, pose, etc). However, a practical recognition system has to be robust to more challenging conditions. In this article we evaluate, on the relatively difficult BANCA database, the performance, robustness and complexity of GMM and HMM-based approaches, using both manual and automatic face localization. We extend the GMM approach through the use of local features with embedded positional information, increasing performance without sacrificing its low complexity. Furthermore, we show that the traditionally used maximum likelihood (ML) training approach has problems estimating robust model parameters when there is only a few training images available. Considerably more precise models can be obtained through the use of Maximum a posteriori probability (MAP) training. We also show that face recognition techniques which obtain good performance on manually located faces do not necessarily obtain good performance on automatically located faces, indicating that recognition techniques must be designed from the ground up to handle imperfect localization. Finally, we show that while the pseudo-2-D HMM approach has the best overall performance, authentication time on current hardware makes it impractical. The best tradeoff in terms of authentication time, robustness and discrimination performance is achieved by the extended GMM approach. 2009-03-31T00:00:00Z Cardinaux, F. og Sanderson, C. og Bengio, S. http://espace.library.uq.edu.au/view/UQ:281689 The interdisciplinary approach of User Centered Design is presented here with a focus on innovation in the design and use of hearing technologies as well as on the potential of innovation in interaction. This approach is geared towards developing new products, systems, technologies and practices based on an understanding of why so few persons with hearing loss use the highly advanced hearing technologies. In integrating Conversation Analysis (“CA”), audiology and User Centered Design, three disciplines which are collaborating together for the first time, we are addressing the following questions: Who is the user? What are the interactional situations in which hearing loss and hearing aids are relevant? How can Conversation Analysis contribute to innovation? What are the challenges in such a collaboration? 2012-09-11T10:27:58Z Egbert, Maria og Matthews, Ben http://espace.library.uq.edu.au/view/UQ:98954 2007-08-24T00:00:00Z Sweetser, P. M. og Drennan, P. G. http://espace.library.uq.edu.au/view/UQ:76303 This paper arises out of a research study into the online help facilities provided in popular software applications such as word processors. Its particular focus is on experimental methods of evaluating the effectiveness and usability of those facilities. Focus groups, questionnaires, and online surveys had already been used in other phases of the study, but it was judged that these approaches would be unsuitable for measuring effectiveness and usability because they are susceptible to respondents' subjectivity. Direct observation of people working on set word-processing tasks was ruled out initially because of a lack of trained observers; it would have taken too long for the investigator to observe a large enough sample by himself. Automatic recording of users' actions was also rejected, as it would have demanded equipment and/or software that was not available and seemed too expensive to acquire. The approach and techniques described here were an attempt to overcome these difficulties by using observers drawn from the same population of students that provided the test subjects; as a by-product, this may also have enhanced the acceptability (and hence possibly the validity) of the experiments by reducing the exam pressure perceived by participants. 2007-08-15T00:00:00Z Foster, G. http://espace.library.uq.edu.au/view/UQ:94936 2007-08-23T00:00:00Z Purchase, H. og Allder, J. og Carrington, D. A. http://espace.library.uq.edu.au/view/UQ:9893 Despite their 40 year history, native executable decompilers have found very limited practical application in commercial projects. The success of Java decompilers is well known, and a few decompilers perform well by recognising patterns from specific compilers. This paper describes the experience gained from applying a native executable decompiler, assisted by a commercial disassembler and hand editing, to a real-world Windows-based application. The clients had source code for a prototype version of the program, and an executable that performed better, for which the source code was not available. The project was to recover the algorithm at the core of the program, and if time permitted, the recovery of other pieces of source code. Despite the difficulties, the core algorithm was successfully decompiled, and a portion of the rest of the program as well. There were surprises, including the ability to recover almost all original class names, and the complete class hierarchy. 2005-02-17T00:00:00Z Van Emmerik, Mike og Waddington, Trent http://espace.library.uq.edu.au/view/UQ:238721 2011-03-24T00:00:00Z Lehmann, Stefan og Bolland, Scott og Remington, Roger og Humphreys, Michael S. og Neal, Andrew http://espace.library.uq.edu.au/view/UQ:244992 2011-08-05T00:00:00Z Abdulatef, Wasan og Abbosh, Amin http://espace.library.uq.edu.au/view/UQ:9004 Business process management (BPM) has emerged as a dominant technology in current enterprise systems and business solutions. However, the technology continues to face challenges in coping with dynamic business environments where requirements and goals are constantly changing. In this paper, we present a modelling framework for business processes that is conducive to dynamic change and the need for flexibility in execution. This framework is based on the notion of process constraints. Process constraints may be specified for any aspect of the process, such as task selection, control flow, resource allocation, etc. Our focus in this paper is on a set of scheduling constraints that are specified through a temporal constraint network. We will demonstrate how this specification can lead to increased flexibility in process execution, while maintaining a desired level of control. A key feature and strength of the approach is to use the power of constraints, while still preserving the intuition and visual appeal of graphical languages for process modelling. 2005-10-31T00:00:00Z Lu, Ruopeng og Sadiq, Shazia og Padmanabhan, Vineet og Governatori, Guido http://espace.library.uq.edu.au/view/UQ:242977 2011-06-25T00:00:00Z Nadler, Izhak og Sanderson, Penelope M. http://espace.library.uq.edu.au/view/UQ:202639 2010-04-13T00:00:00Z Piper, Bruce R. og Shuley, Nicholas V. og Grandine, Thomas A. http://espace.library.uq.edu.au/view/UQ:77947 The Bunge-Wand-Weber (BWW) representation model defines ontological constructs for information systems. According to these constructs the completeness and efficiency of a modeling technique can be defined. Ontology plays an essential role in e-commerce. Using or updating an existing ontology and providing tools to solve any semantic conflicts become essential steps before putting a system online. We use conceptual graphs (CGs) to implement ontologies. This paper evaluates CG capabilities using the BWW representation model. It finds out that CGs are ontologically complete according to Wand and Weber definition. Also it finds out that CGs have construct overload and construct redundancy which can undermine the ontological clarity of CGs. This leads us to build a meta-model to avoid some ontological-unclarity problems. We use some of the BWW constructs to build the meta-model. (c) 2004 Elsevier Ltd. All rights reserved. 2007-08-15T00:00:00Z Kayed, A. og Colomb, R.M. http://espace.library.uq.edu.au/view/UQ:236685 2011-03-16T10:00:50Z Ahmedy, Ismail og Portmann, Marius http://espace.library.uq.edu.au/view/UQ:100373 2007-08-23T00:00:00Z Sweetser, P. M. http://espace.library.uq.edu.au/view/UQ:220186 2010-11-11T18:22:19Z Hassall, M. E. og Sanderson, P. M. og Cameron, I. T. http://espace.library.uq.edu.au/view/UQ:99481 2007-08-24T00:00:00Z Crone, D. J. og Sanderson, P. M. og Naikar, N http://espace.library.uq.edu.au/view/UQ:286374 Content analysis is a powerful tool for investigating attitudes expressed in naturally occurring language data. It is a useful tool to help researchers develop an understanding of a specific research field through identifying how particular issues or topics have been conceptualized or where fieldwork can be limited or prohibitive. This is especially true for research on postconflict reconstruction, where large-scale quantitative surveying or metareviews of the literature can be prohibitive. The present study provides a case study of how a particular content analysis software program—Leximancer—was used to map factors associated with institutional legitimacy in postconflict societies. The case of Timor-Leste is used as an example. We examine texts at three levels of discourse: at the academic, official, and primary levels. Results indicate differing perspectives on legitimacy at each level of discourse. This article offers a snapshot of a potential method for understanding how particular topics are conceptualized within a specific research field and can thus help in the development of evaluation methods or data collection instruments. 2012-11-27T14:40:25Z Fisk, Kylie og Cherney, Adrian og Hornsey, Matthew og Smith, Andrew http://espace.library.uq.edu.au/view/UQ:188610 Students and software developers have found difficulty in developing abstractions of real-world problems within the context of object-oriented analysis and design (OOAD). They have especially found difficulties in deriving sequence diagrams from the problem domain because they are unable to find the appropriate level of abstraction. They essentially do not know 'what' to model. We present an approach to introduce concept mapping as a tool to help novices in OOAD understand and master the technique of abstraction. A concept map derived from an expanded use case (use case narrative) can subsequently evolve into a sequence diagram containing information on the interaction of objects (and their messages) to fulfill the responsibilities of a particular scenario of the use case. Our approach of incorporating concept mapping helps students and software developers achieve an adequate standard of appreciation and proficiency in producing sequence diagrams. This paper contains results of our evaluation of the effectiveness of concept mapping to help students with their abstraction techniques. 2009-11-30T00:00:00Z Sien, V.Y. og Carrington, D. http://espace.library.uq.edu.au/view/UQ:81231 Applications that exploit contextual information in order to adapt their behaviour to dynamically changing operating environments and user requirements are increasingly being explored as part of the vision of pervasive or ubiquitous computing. Despite recent advances in infrastructure to support these applications through the acquisition, interpretation and dissemination of context data from sensors, they remain prohibitively difficult to develop and have made little penetration beyond the laboratory. This situation persists largely due to a lack of appropriately high-level abstractions for describing, reasoning about and exploiting context information as a basis for adaptation. In this paper, we present our efforts to address this challenge, focusing on our novel approach involving the use of preference information as a basis for making flexible adaptation decisions. We also discuss our experiences in applying our conceptual and software frameworks for context and preference modelling to a case study involving the development of an adaptive communication application. 2007-08-15T09:27:27Z Henricksen, Karen og Indulska, Jadwiga og Rakotonirainy, Andry http://espace.library.uq.edu.au/view/UQ:292587 Previous courses addressing the gap between student and professional programming practice have either isolated small groups' development in such a way that larger scale difficulties that motivate many professional practices do not arise, or have required significant additional staffing that would be expensive to provide in a large cohort core undergraduate software engineering course. We describe the first iteration of a course that enabled 73 students to work together to improve a large common legacy code base using professional practices and tools, staffed only by two lecturers and two undergraduate students employed as part-time tutors. The course relies on continuous integration and automated metrics, that coalesce frequently updated information in a manner that is visible to students and can be monitored by a small number of staff. The course is supported by a just-in-time teaching programme of thirty-two technical topics. We describe the constraints that determined the design of the course, and quantitative and qualitative data from the first iteration of the course. 2013-03-03T00:35:01Z Süß, Jörn Guy og Billingsley, William http://espace.library.uq.edu.au/view/UQ:283941 Self-organising systems have become important relatively recently. It is frequently claimed that their complex nature necessitates new formalisms to express and reason about them. In this paper the opposite view is taken. Following Back's use of action systems to express a distributed system as an initialised possibly nonterminating loop, here two simple but representative case studies of self-organising systems are explored using only conventional techniques. The first deals with the configuration of an ad hoc network and shows how safety and liveness can be accurately expressed with an initialised loop. The second involves, like many self-organising systems, probabilistic behaviour and it is shown that existing techniques suffice to establish the system behaviour. In conclusion, the techniques illustrated can be used to provide a higher level of assurance than is possible with simulation alone. 2012-10-26T15:16:58Z Smith, Graeme og Sanders, J. W. http://espace.library.uq.edu.au/view/UQ:99401 2007-08-24T00:00:00Z Drennan, P. G. http://espace.library.uq.edu.au/view/UQ:149579 2008-06-06T00:00:00Z Hussey, A. P. http://espace.library.uq.edu.au/view/UQ:101448 Electronic Blocks are a new programming environment, designed specifically for children aged between three and eight years. As such, the design of the Electronic Block environment is firmly based on principles of developmentally appropriate practices in early childhood education. The Electronic Blocks are physical, stackable blocks that include sensor blocks, action blocks and logic blocks. Evaluation of the Electronic Blocks with both preschool and primary school children shows that the blocks' ease of use and power of engagement have created a compelling tool for the introduction of meaningful technology education in an early childhood setting. The key to the effectiveness of the Electronic Blocks lies in an adherence to theories of development and learning throughout the Electronic Blocks design process. 2007-08-23T00:00:00Z Wyeth, P. og Purchase, H. http://espace.library.uq.edu.au/view/UQ:241111 The design of architecture, in practice, entails the collaboration of many disciplines each with their own set of tools and representations. Building Information Models aim to support interoperability between these disciplines. However current implementations require a lot of manual work involving translating parts from the various specialised descriptions to the common model format. Domain Specific Languages are a development from Information Technology that defines a mapping from the concepts used in one discipline to those used in another. In this paper, a workflow incorporating the movement between specialised languages and a central model is described. The central model is structured using the Industrial Foundation Classes (IFC). The motivation for elaborating on the interdisciplinary workflow is the desire to create a more iterative process without the need for the manual recreation of models. While it is difficult to have a description or language that contains all the information of all the disciplines, this research demonstrates how the IFC schema acts as a pivot not just between data sets, but also between concepts expressed in different representations thus giving from analysis to design. 2011-05-20T00:00:00Z Fernando, Ruwan og Steel, James og Drogemuller, Robin http://espace.library.uq.edu.au/view/UQ:98738 2007-08-24T00:00:00Z Boden, M. B. http://espace.library.uq.edu.au/view/UQ:276835 A method for detecting vocalization of giant barred frogs (Mixophyes iteratus) in noisy audio is proposed. Audio recordings from remote wireless sensor nodes were segmented into individual sounds and from each sound a small set of features was extracted. Feature vectors were compared to those of example calls using a Euclidean distance formula as a detection system. The system achieved a sensitivity of 0.85 with specificity of 0.92 when distinguishing M. iteratus calls from other species’ calls and sensitivity of 0.88 with specificity 0.82 against background noise. 2012-07-02T08:23:07Z Croker, Benjamin og Kottege, Navinda http://espace.library.uq.edu.au/view/UQ:269148 2012-03-06T00:00:00Z Stimson, Robert J. og Mitchell, William og Rohde, David og Shyy, Paul http://espace.library.uq.edu.au/view/UQ:8387 The availability of a good interface for online user collaboration has been a sore point for most collaboration applications to date. While MUD's, MOO's, IRC and other chat applications are well suited to impersonal communication, the meaning of a single message can often be misconstrued or misunderstood, and the effort often required to learn control of a new application while understanding navigation in a virtual world, can be difficult to overcome. The Nexus promises to aid in the intuitive act of communication, interaction and movement and in the process enhance the collaboration experience for the user, through the use of a game engine. 2006-05-26T00:00:00Z Bartlett, Keiran og Simpson, Matthew http://espace.library.uq.edu.au/view/UQ:220289 A major challenge in the development of peptide-based vaccines is finding the right immunogenic element, with efficient and long-lasting immunization effects, from large potential targets encoded by pathogen genomes. Computer models are convenient tools for scanning pathogen genomes to preselect candidate immunogenic peptides for experimental validation. Current methods predict many false positives resulting from a low prevalence of true positives. We develop a test reject method based on the prediction uncertainty estimates determined by Gaussian process regression. This method filters false positives among predicted epitopes from a pathogen genome. The performance of stand-alone Gaussian process regression is compared to other state-of-the-art methods using cross validation on 11 benchmark data sets. The results show that the Gaussian process method has the same accuracy as the top performing algorithms. The combination of Gaussian process regression with the proposed test reject method is used to detect true epitopes from the Vaccinia virus genome. The test rejection increases the prediction accuracy by reducing the number of false positives without sacrificing the method's sensitivity. We show that the Gaussian process in combination with test rejection is an effective method for prediction of T-cell epitopes in large and diverse pathogen genomes, where false positives are of concern. 2010-11-14T00:02:06Z You, Liwen og Brusic, Vladimir og Gallagher, Marcus og Boden, Mikael http://espace.library.uq.edu.au/view/UQ:1867 Model transformations are one of the core technologies needed to apply OMG’s model driven engineering concept for the construction of real world systems. Several formalisms are currently proposed for the specification of these model transformations. A suitable formalism is based on graph transformation systems and graph transformation rules. The chapter provides an overview about the needed concepts to apply graph transformations in the context of model driven engineering and we show the technical feasibility based on several tools and applications. 2006-04-07T00:00:00Z Grunske,Lars og Leif Geiger og Albert Zündorf og Niels Van Eetvelde og Pieter Van Gorp og Daniel Varro http://espace.library.uq.edu.au/view/UQ:71479 2007-08-14T00:00:00Z Grunske, L. og Geiger, L. og Zundorf, A. og van Eetvelde, N og van Gorp, P. og Varro, D. http://espace.library.uq.edu.au/view/UQ:100519 Three important goals in describing software design patterns are: generality, precision, and understandability. To address these goals, this paper presents an integrated approach to specifying patterns using Object-Z and UML. To achieve the generality goal, we adopt a role-based metamodeling approach to define patterns. With this approach, each pattern is defined as a pattern role model. To achieve precision, we formalize role concepts using Object-Z (a role metamodel) and use these concepts to define patterns (pattern role models). To achieve understandability, we represent the role metamodel and pattern role models visually using UML. Our pattern role models provide a precise basis for pattern-based model transformations or refactoring approaches. 2007-08-23T00:00:00Z Kim, S. og Carrington, D. A. http://espace.library.uq.edu.au/view/UQ:78147 2007-08-15T00:00:00Z Leong, W. Y. og Homer, J. P. http://espace.library.uq.edu.au/view/UQ:96150 2007-08-24T00:00:00Z Atukorale, D. og Downs, T. http://espace.library.uq.edu.au/view/UQ:276871 In this paper we extend a previously proposed randomized landscape generator in combination with a comparative experimental methodology to study the behavior of continuous metaheuristic optimization algorithms. In particular, we generate twodimensional landscapes with parameterized, linear ridge structure, and perform pairwise comparisons of algorithms to gain insight into what kind of problems are easy and difficult for one algorithm instance relative to another.We apply thismethodology to investigate the specific issue of explicit dependency modeling in simple continuous estimation of distribution algorithms. Experimental results reveal specific examples of landscapes (with certain identifiable features) where dependency modeling is useful, harmful, or has little impact on mean algorithm performance. Heat maps are used to compare algorithm performance over a large number of landscape instances and algorithm trials. Finally, we perform ameta-search in the landscape parameter space to find landscapes which maximize the performance between algorithms. The results are related to some previous intuition about the behavior of these algorithms, but at the same time lead to new insights into the relationship between dependency modeling in EDAs and the structure of the problem landscape. The landscape generator and overall methodology are quite general and extendable and can be used to examine specific features of other algorithms. 2012-07-02T08:31:37Z Morgan, R. og Gallagher, M. http://espace.library.uq.edu.au/view/UQ:268473 In this paper we develop an algorithmic framework allowing for fast and elegant path correction exploiting Lie group symmetries and operating without the need for explicit control strategies such as cross-track regulation. These systems occur across the gamut of robotics, notably in locomotion, be it ground, underwater, airborne, or surgical domains. Instead of reintegrating an entire trajectory, the method selectively alters small key segments of an initial trajectory in a consistent way so as to transform it via symmetry operations. The algorithm is formulated for arbitrary Lie groups and applied in the context of the special Euclidean group and subgroups thereof. A sampling-based motion planner is developed that uses this method to create paths for underactuated systems with differential constraints. It is also shown how the path correction method acts as a controller within a feedback control loop for real-time path correction. These approaches are demonstrated for ground vehicles in the plane and for flexible bevel tip needle steering in space. The results show that using symmetry-based path correction for motion planning provides a prudent and simple, yet computationally tractable, integrated planning and control strategy. 2012-02-26T06:06:19Z Seiler, Konstantin M. og Singh, Surya P. N. og Sukkarieh, Salah og Durrant-Whyte, Hugh http://espace.library.uq.edu.au/view/UQ:197585 2010-03-03T00:00:00Z Abdulatef, W. M. og Abbosh, A. M. http://espace.library.uq.edu.au/view/UQ:181330 Search engines retrieve and rank Web pages which are not only relevant to a query but also important or popular for the users. This popularity has been studied by analysis of the links between Web resources. Link-based page ranking models such as PageRank and HITS assign a global weight to each page regardless of its location. This popularity measurement has shown successful on general search engines. However unlike general search engines, location-based search engines should retrieve and rank higher the pages which are more popular locally. The best results for a location-based query are those which are not only relevant to the topic but also popular with or cited by local users. Current ranking models are often less effective for these queries since they are unable to estimate the local popularity. We offer a model for calculating the local popularity of Web resources using back link locations. Our model automatically assigns correct locations to the links and content and uses them to calculate new geo-rank scores for each page. The experiments show more accurate geo-ranking of search engine results when this model is used for processing location-based queries. © Springer Science + Business Media, LLC 2008. 2009-09-03T08:26:02Z Asadi, Saeid og Zhou, Xiaofang og Yang, Guowei http://espace.library.uq.edu.au/view/UQ:193712 We examined associative and item recognition using the maintenance rehearsal paradigm. Our intent was to control for mnemonic strategies; to produce a low, graded level of learning; and to provide evidence of the role of attention in long-term memory. An advantage for low-frequency words emerged in both associative and item recognition at very low levels of learning. This early emergence casts doubt on explanations based on the traditional concept of recollection. A comparison of false alarms supports a role for item information or the joint use of cues but not familiarity in producing associative false alarms. We may also have found a way to measure the amount of attention being paid to a to-be-learned item or pair, independently of memory performance on the attended item. This result may be an important step in determining whether coherent theories about the role of attention in long- and short-term memory can be created. © 2010 American Psychological Association. 2010-01-24T00:02:39Z Humphreys, Michael S. og Maguire, Angela M. og McFarlane, Kimberley A. og Burt, Jennifer S. og Bolland, Scott W. og Murray, Krista L. og Dunn, Ryan http://espace.library.uq.edu.au/view/UQ:100328 One of the challenges for software engineering is collecting meaningful data from industrial projects. Software process improvement depends on measurement to provide baseline status and confirming evidence of the effect of process changes. Without data, any conclusions rely on intuition and guessing. The Team Software ProcessSM (TSPSM) provides a powerful framework for data collection and analysis, in addition to its primary goal as a basis for highly effective software development. In this paper, we describe the experiences of, and benefits realized by, a team using the TSP for the first time. By reviewing how this particular team collected and used data, we show features of the TSP that make it a powerful foundation for software process improvement. 2007-08-23T00:00:00Z Davis, N. og Mullaney, J. og Carrington, D. A. http://espace.library.uq.edu.au/view/UQ:172376 2009-03-27T00:00:00Z Derrick, J. og Smith, G. http://espace.library.uq.edu.au/view/UQ:166582 2009-03-09T00:00:00Z Neal, A. og Mooij, M. og Bolland, S. og Xiao, T. og Lindsay, P. og Boag, C. http://espace.library.uq.edu.au/view/UQ:172034 2009-03-26T00:00:00Z Iannella, R. og Lam, H og Steel, J. http://espace.library.uq.edu.au/view/UQ:96991 2007-08-24T00:00:00Z Kayed, A. og Colomb, R. M. http://espace.library.uq.edu.au/view/UQ:229292 2011-02-16T11:10:10Z Hunter, Jane og Becker, Peter og Alabri, Abdulmonem og van Ingen, Catharine og Abal, Eva http://espace.library.uq.edu.au/view/UQ:284360 2012-11-05T14:35:49Z Hussey, Andrew og Carrington, David http://espace.library.uq.edu.au/view/UQ:103181 2007-08-23T00:00:00Z Xu, G og Zhang, Y. og Zhou, X. http://espace.library.uq.edu.au/view/UQ:95552 2007-08-23T00:00:00Z Walker, G. R.