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:103084 2007-08-23T00:00:00Z Robinson, R. R. og Indulska, J. http://espace.library.uq.edu.au/view/UQ:198178 We present a contraction algorithm for finding a minimal set of arcs or vertices that break all cycles in a digraph. The algorithm is (essentially) an extension to the contraction algorithm for the feedback vertex set problem introduced by Levy and Lew (Levy & Lew 1988). The algorithm's time complexity of O (mlog n) is preserved, while allowing both (weighted) feedback vertices and arcs. As the trans- formation from feedback arc set to feedback vertex set graph increases the graph's size, the new algorithm becomes both faster and more powerful than the original one when applied to feedback arc set problems. We will show that the algorithm works well for reducible °ow graphs, as it preserves the structure and can easily be combined with the algorithm proposed by Ramachandran (Ramachandran 1988). 2010-03-08T00:00:00Z Koehler, Henning http://espace.library.uq.edu.au/view/UQ:271652 2012-03-26T13:46:40Z Hossain, M. J. og Saha, T. K. og Mithulananthan, N. http://espace.library.uq.edu.au/view/UQ:135706 2008-04-18T00:00:00Z Luo, Y. og Xue, Y. og Ledwich, G. og Yin, X. og Dong, Z.Y. og Liu, H. og Hu, W. http://espace.library.uq.edu.au/view/UQ:100480 In this paper, we compare a well-known semantic spacemodel, Latent Semantic Analysis (LSA) with another model, Hyperspace Analogue to Language (HAL) which is widely used in different area, especially in automatic query refinement. We conduct this comparative analysis to prove our hypothesis that with respect to ability of extracting the lexical information from a corpus of text, LSA is quite similar to HAL. We regard HAL and LSA as black boxes. Through a Pearsonrsquos correlation analysis to the outputs of these two black boxes, we conclude that LSA highly co-relates with HAL and thus there is a justification that LSA and HAL can potentially play a similar role in the area of facilitating automatic query refinement. This paper evaluates LSA in a new application area and contributes an effective way to compare different semantic space models. 2007-08-23T00:00:00Z Yan, Xin og Li, Xue og Song, Daqei http://espace.library.uq.edu.au/view/UQ:262766 2011-12-02T00:00:00Z Antoniades, M. A. og Eleftheriades, G. V. http://espace.library.uq.edu.au/view/UQ:8601 This paper critically compares, for the first time, common microwave and optical procedures used for the high-speed characterisation of vertical-cavity, surface-emitting lasers (VCSELs). The intrinsic small-signal modulation characteristics of a VCSEL are measured, and the related rate equation parameters are extracted. Observed trends show excellent agreement with theory. The modulation characteristics of the VCSEL are determined by examining three different responses: relative intensity noise, S21 response, and high-resolution optical spectra. The various experimental techniques yielded consistent results. The relative strengths and weaknesses of each measurement are investigated below. 2006-02-21T00:00:00Z Majewski, Marian L. og O'Brien, Christopher J. og Rakic, Aleksandar D. http://espace.library.uq.edu.au/view/UQ:128482 This paper critically compares, for the first time, common microwave and optical procedures used for the highspeed characterization of vertical-cavity surface-emitting lasers (VCSELs). The intrinsic small-signal modulation characteristics of a VCSEL are measured, and the related rate equation parameters are extracted. Observed trends show excellent agreement with theory. The modulation characteristics of the VCSEL are determined by examining three different responses: relative intensity noise, S21 response, and high-resolution optical spectra. The various experimental techniques yielded consistent results. The relative strengths and weaknesses of each measurement are investigated. 2008-02-18T00:00:00Z O'Brien, C.J. og Majewski, M.L. og Rakic, A.D. http://espace.library.uq.edu.au/view/UQ:10657 Recent investigations have lead to the use of TFRs to filter noise-corrupted, frequency varying signals. This approach appeals to the intuition as a logical extension of linear, time-invariant filter theory. In this paper, TFRs which belong to the generalized class first introduced by Cohen are examined for suitability for time-frequency filtering of signals possessing several harmonic components. We conclude that, due to the bilinear nature of the representations examined, a destructive phase scrambling of the signal components occurs. This will happen whenever any modification is made to a TFR of Cohen's class. The result is that time-frequency filtering seems to be inappropriate when applied to noisy harmonic signals using members of Cohen's class. 2004-03-12T00:00:00Z Kootsookos, Peter J. http://espace.library.uq.edu.au/view/UQ:277511 2012-07-12T14:05:57Z Stratton, Peter og Cheung, Allen og Wiles, Janet H. og Kiyatkin, E. og Sah, Pankaj og Windels, Francois http://espace.library.uq.edu.au/view/UQ:287013 Human action recognition in videos draws strong research interest in computer vision because of its promising applications for video surveillance, video annotation, interactive gaming, etc. However, the amount of video data containing human actions is increasing exponentially, which makes the management of these resources a challenging task. Given a database with huge volumes of unlabeled videos, it is prohibitive to manually assign specific action types to these videos. Considering that it is much easier to obtain a small number of labeled videos, a practical solution for organizing them is to build a mechanism which is able to conduct action annotation automatically by leveraging the limited labeled videos. Motivated by this intuition, we propose an automatic video annotation algorithm by integrating semi-supervised learning and shared structure analysis into a joint framework for human action recognition. We apply our algorithm on both synthetic and realistic video datasets, including KTH [20], CareMedia dataset [1], Youtube action [12] and its extended version, UCF50 [2]. Extensive experiments demonstrate that the proposed algorithm outperforms the compared algorithms for action recognition. Most notably, our method has a very distinct advantage over other compared algorithms when we have only a few labeled samples. 2012-12-09T00:58:57Z Wang, Sen og Yang, Yi og Ma, Zhigang og Li, Xue og Pang, Chaoyi og Hauptmann, Alexander G. http://espace.library.uq.edu.au/view/UQ:97319 2007-08-24T00:00:00Z Governatori, G. og Gelati, J. og Rotolo, A. og Sartor, G. http://espace.library.uq.edu.au/view/UQ:151558 This paper presents a novel method for enabling a robot to determine the position of a sound source in three dimensions using just two microphones and interaction with its environment. The method uses the Parameter-Less Self-Organising Map (PLSOM) algorithm and Reinforcement Learning (RL) to achieve rapid, accurate response. We also introduce a method for directional filtering using the PLSOM. The presented system is compared to a similar system to evaluate its performance. 2008-06-25T00:00:00Z Berglund, E og Sitte, J. og Wyeth, G. F. http://espace.library.uq.edu.au/view/UQ:8927 Colposcopic images from cervix uteri are subjected to a segmentation algorithm using a combination of an active contour model or snakes on multiresolution levels, using a Gaussian Pyramid (GP). The segmentation aims to outline a specific feature from the cervical images- the Transformation Zone (TZ), where a possible neoplasia (a pre-cancer or cancer tissue stage) can occur. The process includes an implementation of a new snake - the boundary-searching snake, based on both image gradient features and region features. The adaptive 'snake' is executed on a low image resolution level, aiming to avoid a specific artifact in the images-known as a specular reflection. Further, the snake coordinates are propagated to the highest level of the GP. The resulting algorithm segments one of the most complex and variable anatomical shapes as a biological structure in its normal and pre-cancerous stages of the cervix uteri. 2005-11-23T00:00:00Z Raad, Viara Van og Bradley, Andrew P. http://espace.library.uq.edu.au/view/UQ:210064 The aim of duplicate detection is to group records in a relation which refer to the same entity in the real world such as a person or business. Most existing works require user specified parameters such as similarity threshold in order to conduct duplicate detection. These methods are called user-first in this paper. However, in many scenarios, pre-specification from the user is very hard and often unreliable, thus limiting applicability of user-first methods. In this paper, we propose a user-last method, called Active Duplicate Detection (ADD), where an initial solution is returned without forcing user to specify such parameters and then user is involved to refine the initial solution. Different from user-first methods where user makes decision before any processing, ADD allows user to make decision based on an initial solution. The identified initial solution in ADD enjoys comparatively high quality and is easy to be refined in a systematic way (at almost zero cost). 2010-08-01T00:00:00Z Deng, Ke og Wang, Liwei og Zhou, Xiaofang og Sadiq, Shazia og Fung, Gabriel Pui Cheong http://espace.library.uq.edu.au/view/UQ:65554 In standard cylindrical gradient coils consisting of a single layer of wires, a limiting factor in achieving very large magnetic field gradients is the rapid increase in coil resistance with efficiency. This is a particular problem in small-bore scanners, such as those used for MR microscopy. By adopting a multi-layer design in which the coil wires are allowed to spread out into multiple layers wound at increasing radii, a more favourable scaling of resistance with efficiency is achieved, thus allowing the design of more powerful gradient coils with acceptable resistance values. Previously this approach has been applied to the design of unshielded, longitudinal, and transverse gradient coils. Here, the multi-layer approach has been extended to allow the design of actively shielded multi-layer gradient coils, and also to produce coils exhibiting enhanced cooling characteristics. An iterative approach to modelling the steady-state temperature distribution within the coil has also been developed. Results indicate that a good level of screening can be achieved in multi-layer coils, that small versions of such coils can yield higher efficiencies at fixed resistance than conventional two-layer (primary and screen) coils, and that performance improves as the number of layers of increases. Simulations show that by optimising multi-layer coils for cooling it is possible to achieve significantly higher gradient strengths at a fixed maximum operating temperature. A four-layer coil of 8 mm inner diameter has been constructed and used to test the steady-state temperature model. (C) 2003 Elsevier Inc. All rights reserved. 2007-08-15T00:00:00Z Leggett, J. og Crozier, S. og Bowtell, R. W. http://espace.library.uq.edu.au/view/UQ:98815 2007-08-24T00:00:00Z Leggett, J. og Crozier, S. og Bowtell, R. http://espace.library.uq.edu.au/view/UQ:108029 A major requirement for pervasive systems is to integrate context-awareness to support heterogeneous networks and device technologies and at the same time support application adaptations to suit user activities. However, current infrastructures for pervasive systems are based on centralized architectures which are focused on context support for service adaptations in response to changes in the computing environment or user mobility. In this paper, we propose a hierarchical architecture based on active nodes, which maximizes the computational capabilities of various nodes within the pervasive computing environment, while efficiently gathering and evaluating context information from the user's working environment. The migratable active node architecture employs various decision making processes for evaluating a rich set of context information in order to dynamically allocate active nodes in the working environment, perform application adaptations and predict user mobility. The active node also utilizes the Redundant Positioning System to accurately manage user's mobility. This paper demonstrates the active node capabilities through context-aware vertical handover applications. 2007-08-27T00:00:00Z Balasubramaniam, Sasitharan og Pfeifer, Tom og Indulska, Jadwiga http://espace.library.uq.edu.au/view/UQ:103161 2007-08-23T00:00:00Z Wu, Y. J. og Homer, J. P. http://espace.library.uq.edu.au/view/UQ:150330 2008-06-06T00:00:00Z Robinson, A. og Bialkowski, M. E. og Song, H. http://espace.library.uq.edu.au/view/UQ:148966 2008-06-06T00:00:00Z Zhao, H. og Crozier, S. http://espace.library.uq.edu.au/view/UQ:238841 Pattern recognition has been used extensively in medical information retrieval and data analyses. Specifically, it involves pattern classification, indexing, clustering, anomaly detection and rule detection. Among various patterns, trend is a simple yet powerful pattern that can be associated with many complex clinical symptoms. Detecting adverse clinical trend is thus an important proactive approach to critical clinical situation managements. In this paper, we propose an online trend pattern detection system, the Anaesthetic Data Analyser (ADA), as a platform to monitor trend patterns of physiological data collected during anaesthesia. ADA differentiates from current approaches by looking at trends rather than a single data value against a preset threshold. Our online trend pattern detection and trend query processing algorithms also make ADA support real time trend monitoring efficiently. Experiments on physiological data collected from patients demonstrate the efficiency and effectiveness of the ADA system and our algorithms. 2011-03-25T00:00:00Z Zhang, Qing og Pang, Chaoyi og Xie, Qing og Mcbride, Simon og Hansen, David og Zhang, Yanchun http://espace.library.uq.edu.au/view/UQ:55892 This paper seeks to understand how software systems and organisations co-evolve in practice and how order emerges in the overall environment. Using a metaphor of timetable as a commons, we analyse the introduction of a novel academic scheduling system to demonstrate how Complex Adaptive Systems theory provides insight into the adaptive behaviour of the various actors and how their action is both a response to and a driver of co-evolution within the engagement. 2007-08-13T15:37:01Z Kim, R. M. og Kaplan, S. M. http://espace.library.uq.edu.au/view/UQ:149063 2008-06-06T00:00:00Z Bolland, S. og Wiles, J. H. http://espace.library.uq.edu.au/view/UQ:149483 2008-06-06T00:00:00Z Greenberg, S. og Fitzpatrick, G. og Gutwin, C. og Kaplan, S. M. http://espace.library.uq.edu.au/view/UQ:95728 2007-08-23T00:00:00Z Henricksen, K. M. og Indulska, J. http://espace.library.uq.edu.au/view/UQ:102635 2007-08-23T00:00:00Z Foo, J. Y. A. og Leong, W. Y. og Wilson, S. J. og Homer, J. P. http://espace.library.uq.edu.au/view/UQ:181667 Air-fuel ratio control is a challenging control problem for port-fuel-injected and throttle-body-fuel-injected spark ignition (SI) engines, since the dynamics of air manifold and fuel injection of the SI engines are highly nonlinear and often with unmodeled uncertainties and disturbance. This paper presents nonlinear control approaches for multi-input multi-output engine models, by developing adaptive control and learning control design methods. Theoretical proofs are established that ensure that proposed controllers are able to give asymptotical tracking performance. As a comparison, the method applying global linearizing controller can give accurate tracking for the engine model without uncertainty and disturbance, but it fails to keep tracking performance when uncertainty is incorporated into the system. Adaptive control and learning control approaches are capable of dealing with both constant uncertainty and time-varying periodic uncertainty. Simulation results illustrate the efficacy of the proposed controllers. 2009-09-03T08:41:29Z Tang, Huajin og Weng, Larry og Dong, Zhao Yang og Yan, Rui http://espace.library.uq.edu.au/view/UQ:173853 2009-04-05T00:00:00Z Chin, V. og Dong, Z. Y. og Saha, T. K. og Ford, J. og Zhang, J. http://espace.library.uq.edu.au/view/UQ:104579 2007-08-23T00:00:00Z Robinson, R og Indulska, J http://espace.library.uq.edu.au/view/UQ:234844 2011-03-11T10:06:33Z Packer, J. S. og Mason, D. G. og Cade, J. F. og McKinley, S. M. http://espace.library.uq.edu.au/view/UQ:147458 2008-06-06T00:00:00Z Indulska, J. og Loke, S. W. og Rakotonirainy, A. og Zaslavsky, A. http://espace.library.uq.edu.au/view/UQ:228047 A method is disclosed for adaptive filtering of at least one pixel having an initial value of an image composed of pixels. The method comprises: calculating local expected value for the pixel; calculating local signal to noise ratio; calculating local filtration ratio based at least on said local signal to noise ratio; calculating a weighted average of the initial value and local expected value using said local filtration ratio as weight; and assigning the weighted average as a new value for the pixel. 2011-02-03T00:00:00Z Gal, Yaniv http://espace.library.uq.edu.au/view/UQ:175867 Gradient and shim coil design is an inverse problem in which the objective is to generate a magnetic field with an error that falls within acceptable limits while optimizing some other property of the coil. This problem can be solved using a boundary element method via regularized matrix inversion. However, it is not possible to optimize properties that are not linear-least-squares with respect to the solutions using this method. In this work, we employ adaptive regularization to design coils with reduced maximum local current density, which is not a linear-least-squares problem. Reducing the maximum local current density allows the design of coils with lower maximum local Joule heating for the same gradient field strength and uniformity. Excessive local heating can be the cause of thermal drift and localized gradient failure. The minimum spacing between wires is increased by this method, permitting the design of more efficient coils for a given minimum wire spacing constraint as dictated by the method of manufacture. The adaptive regularization method, as formulated within the inverse boundary element method (IBEM) coil design framework, is described and results from three types of adaptively regularized coils are presented. The maximum local current densities of the coils are shown to be significantly reduced by adaptive regularization at the expense of some increase in their inductances and resistances. © 2008 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 33B: 220-227, 2008 2009-04-15T00:00:00Z Poole, M. og Sanchez Lopez, H. og Crozier, S. http://espace.library.uq.edu.au/view/UQ:147459 2008-06-06T00:00:00Z Mcclure, B. og Indulska, J. og Au, T. A. http://espace.library.uq.edu.au/view/UQ:234957 We have developed a novel adaptive multiinfusion advisory system for circulatory management of critically ill patients which co-ordinates infusion adjustments to ensure safe trajectories. This system should reduce patient hospital stay and improve patient outcome by enhancing the quality of patient circulatory control; alleviating the clinical cognitive load, giving staff more time for direct patient care, while also reducing infusion adjustment errors. We have applied three derived circulatory variables which relate to the three main types of cardiovascular infusions (inotropic, vasoactive and fluid). A lumped parameter steady flow model of the human circulatory system and the effects of cardiovascular infusions was constructed for algorithm development, clinical experts providing feedback on a representative test set of simulated patients in circulatory shock. Independent self-learning fuzzy logic controllers (SLFLC) were found to give good adaptation to variable patient infusion sensitivities. A supervisory, rule-based module co-ordinates infusion adjustments to ensure safe circulatory trajectories. Monitoring of manual infusion adjustments allows timely advice and also a critiquing capability which can train junior staff and reduce infusion adjustment errors. A physical mock circulatory loop was used to construct and test our physical advisory system. Preliminary clinical results show good clinical utility of our adaptive multi-infusion advisory system. 2011-03-11T00:00:00Z Bancroft, Jayne og Fraser, John F. og Mason, David. G. http://espace.library.uq.edu.au/view/UQ:281512 We have developed a novel adaptive multi-infusion advisory system for circulatory management of critically ill patients which co-ordinates infusion adjustments to ensure safe trajectories. This system should reduce patient hospital stay and improve patient outcome by enhancing the quality of patient circulatory control; alleviating the clinical cognitive load, giving staff more time for direct patient care, while also reducing infusion adjustment errors. We have applied three derived circulatory variables which relate to the three main types of cardiovascular infusions (inotropic, vasoactive and fluid). A lumped parameter steady flow model of the human circulatory system and the effects of cardiovascular infusions was constructed for algorithm development, clinical experts providing feedback on a representative test set of simulated patients in circulatory shock. Independent self-learning fuzzy logic controllers (SLFLC) were found to give good adaptation to variable patient infusion sensitivities. A supervisory, rule-based module co-ordinates infusion adjustments to ensure safe circulatory trajectories. Monitoring of manual infusion adjustments allows timely advice and also a critiquing capability which can train junior staff and reduce infusion adjustment errors. A physical mock circulatory loop was used to construct and test our physical advisory system. Preliminary clinical results show good clinical utility of our adaptive multi-infusion advisory system. 2012-09-08T00:00:00Z Mason, David G. og Bancroft, Jayne og Fraser, John F. http://espace.library.uq.edu.au/view/UQ:95424 2007-08-23T00:00:00Z Dong, Z. Y. og Zhang, B-L. og Huang, Q. http://espace.library.uq.edu.au/view/UQ:7723 Crosstalk is a major limitation to achieving high data-rates in next generation VDSL systems. Whilst crosstalk cancellation can be applied to completely remove crosstalk, it is often too complex for application in typical VDSL binders, which can contain up to hundreds of lines. A practical alternative, known as partial cancellation limits the cancellation to crosstalkers that cause severe interference to the other lines within the binder. In real VDSL systems, the crosstalk environment changes rapidly as new lines come online; old lines go offline, and the crosstalk channels change with fluctuations in ambient temperature. Therefore, adaptive crosstalk cancellers are often required. In this paper, we propose a new detection guided adaptive NLMS method for Adaptive Partial Crosstalk Cancellation that detects significant crosstalkers and tracks variations in their crosstalk channels. This exploits the sparse and column-wise diagonal dominant properties of the crosstalk channel matrix and leads to fast convergence, accurate crosstalk channel tracking, with a lower update complexity. The end result is an adaptive Partial Crosstalk Cancellation algorithm that has lower run-time complexity than prior state-of-the-art whilst yielding comparatively high data-rates and reliable service. 2006-11-27T00:00:00Z Homer, J. P. og Gujrathi, M. L. og Cendrillon, R. J. og Clarkson, I. V. L. og Moonen, M. http://espace.library.uq.edu.au/view/UQ:135509 2008-04-16T00:00:00Z Wang, H. og Xue, Y. og Dong, Z.Y. og Ledwich, G. og Liu, Y. http://espace.library.uq.edu.au/view/UQ:222672 A robust foreground object segmentation technique is proposed, capable of dealing with image sequences containing noise, illumination variations and dynamic backgrounds. The method employs contextual spatial information by analysing each image on an overlapping patch-by-patch basis and obtaining a low-dimensional texture descriptor for each patch. Each descriptor is passed through an adaptive multi-stage classifier, comprised of a likelihood evaluation, an illumination robust measure, and a temporal correlation check. A probabilistic foreground mask generation approach integrates the classification decisions by exploiting the overlapping of patches, ensuring smooth contours of the foreground objects as well as effectively minimising the number of errors. The parameter settings are robust against wide variety of sequences and post-processing of foreground masks is not required. Experiments on the difficult Wallflower and I2R datasets show that the proposed method obtains considerably better results (both qualitatively and quantitatively) than methods based on Gaussian mixture models, feature histograms, and normalised vector distances. Further experiments on the CAVIAR dataset (using several tracking algorithms) indicate that the proposed method leads to considerable improvements in object tracking accuracy. © 2010 IEEE. 2010-11-26T00:00:00Z Reddy, Vikas og Sanderson, Conrad og Sanin, Andres og Lovell, Brian http://espace.library.uq.edu.au/view/UQ:122952 2008-01-25T16:08:09Z Cui, B og Hu, J og Shen, HT og Yu, C http://espace.library.uq.edu.au/view/UQ:259065 In highly interactive dynamic web database systems, user satisfaction determines their success. In such systems, user requested web pages are dynamically created by executing a number of database queries or web transactions. In this paper, we model the interrelated transactions generating a web page as workflows and quantify the user satisfaction by associating dynamic web pages with soft-deadlines. Further, we model the importance of transactions in generating a page by associating different weights to transactions. Using this framework, system success is measured in terms of minimizing the deviation from the deadline (i.e., tardiness) and also minimizing the weighted such deviation (i.e., weighted tardiness). In order to efficiently support the materialization of dynamic web pages, we propose ASETS∗, which is a parameter-free adaptive scheduling algorithm that automatically adapts to, not only system load, but also transactions’ characteristics (i.e., interdependencies, deadlines and weights). ASETS∗ prioritizes the execution of transactions with the objective of minimizing weighted tardiness. It is also capable of balancing the tradeoff between optimizing average- and worst-case performance when needed. The performance advantages of ASETS∗ are experimentally demonstrated. 2011-10-23T00:00:00Z Guirguis, Shenoda og Sharaf, Mohamed A. og Chrysanthis, Panos K. og Labrinidis, Alexandros og Pruhs, Kirk http://espace.library.uq.edu.au/view/UQ:234908 2011-03-11T00:00:00Z Mason, D. G. og Ross, J. J. og Edwards, N. D. og Andrzejowski, J. C. og Claydon, P. og Johnson, T. og Dobbs, P. og Linkens, D. A. http://espace.library.uq.edu.au/view/UQ:204959 2010-05-09T00:01:46Z Zabit, U. og Atashkhooei, R. og Bosch, T. og Royo, S. og Bony, F. og Rakic, A. D. http://espace.library.uq.edu.au/view/UQ:98565 2007-08-24T00:00:00Z Uthansakul, P. og Bialkowski, M. E. http://espace.library.uq.edu.au/view/UQ:215588 Efficiently and effectively identifying similar videos is an important and nontrivial problem in content-based video retrieval. This paper proposes a subspace symbolization approach, namely SUDS, for content-based retrieval on very large video databases. The novelty of SUDS is that it explores the data distribution in subspaces to build a visual dictionary with which the videos are processed by deriving the string matching techniques with two-step data simplification. Specifically, we first propose an adaptive approach, called VLP, to extract a series of dominant subspaces of variable lengths from the whole visual feature space without the constraint of dimension consecutiveness. A stable visual dictionary is built by clustering the video keyframes over each dominant subspace. A compact video representation model is developed by transforming each keyframe into a word that is a series of symbols in the dominant subspaces, and further each video into a series of words. Then, we present an innovative similarity measure called CVE, which adopts a complementary information compensation scheme based on the visual features and sequence context of videos. Finally, an efficient two-layered index strategy with a number of query optimizations is proposed to facilitate video retrieval. The experimental results demonstrate the high effectiveness and efficiency of SUDS. 2010-09-05T00:06:06Z Zhou, Xiangmin og Zhou, Xiaofang og Chen, Lei og Shu, Yanfeng og Bouguettaya, Athman og Taylor, John A. http://espace.library.uq.edu.au/view/UQ:236693 The attractiveness of Wireless Mesh Networks (WMNs), in general, can be attributed to their ability to dynamically self-organize and self-configure, coupled with the ability to maintain mesh connectivity, resulting in low cost installation set-up, simpler maintenance tasks, and service coverage with high reliability and fault-tolerance. As a result, WMNs have found many useful applications in a broad range of domains. In this paper, we discuss the need for adaptive and dynamic routing protocols in WMNs and discussed several existing approaches for adaptive routing protocols. We also identify the different parameters in traditional wireless routing protocols (and their variants) and provide a qualitative review of their impact on network performance when adapted to changes in network characteristics. We include our initial finding in simulation scenario to investigate the relationship of important parameter with respect to mobility. A comparison of existing adaptive WMNs protocols are also presented in this paper. 2011-03-16T00:00:00Z Azzuhri, Saaidal og Portmann, Marius og Tan, Wee Lum http://espace.library.uq.edu.au/view/UQ:95703 2007-08-23T00:00:00Z Hartono, Z. A. og Robiah, I. og Darveniza, M. http://espace.library.uq.edu.au/view/UQ:135747 This paper presents a method of determining which type of data provides maximum accuracy with reference to non-technical loss analysis in the electricity distribution sector. The method is based on two popular classification algorithms, Naïve Bayesian and Decision Tree. It involves extracting the patterns of customers’ kWh consumption behaviour from historical data and arranging the data in various ways by averaging them yearly, monthly, weekly, and daily. Both techniques are used and compared. The intention is to ensure the acquisition of optimum results in developing representative load profiles to be used as the reference for non-technical loss analysis directed at detecting any significant activities that may contribute to such losses. 2008-04-21T09:49:09Z Nizar, A. H. og Dong, Z. Y. og Zhao, J. og Zhang, P.