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2012

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Full-Text Articles in Physical Sciences and Mathematics

A Comparative Analysis Of Decision Trees Vis-À-Vis Other Computational Data Mining Techniques In Automotive Insurance Fraud Detection, Adrian Gepp, Kuldeep Kumar, J Holton Wilson, Sukanto Bhattacharya Jul 2014

A Comparative Analysis Of Decision Trees Vis-À-Vis Other Computational Data Mining Techniques In Automotive Insurance Fraud Detection, Adrian Gepp, Kuldeep Kumar, J Holton Wilson, Sukanto Bhattacharya

Kuldeep Kumar

No abstract provided.

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Exploring Teleconsultation Acceptance: A Comparison Study Between Emergency And Non-Emergency Setting, Nurazean Maarop, Khin Than Win, Maslin Masrom, Sukdershan Singh Hazara Singh Dec 2012

Exploring Teleconsultation Acceptance: A Comparison Study Between Emergency And Non-Emergency Setting, Nurazean Maarop, Khin Than Win, Maslin Masrom, Sukdershan Singh Hazara Singh

Dr Khin Win

This research explores the acceptance of teleconsultation technology among healthcare providers of public hospitals in Malaysia. Primary constructs from Davis' Technology Acceptance Model (TAM) are employed for this purpose. Further, the study also compares the level of user acceptance between emergency and non-emergency setting. This study is based on descriptive statistic and correlation analysis served as preliminary exploration of the acceptance of the technology understudy. The study reports a high level of acceptance of teleconsultation technology in both emergency and non-emergency settings thus exhibits no significant difference in acceptance the acceptance of teleconsultation technology for both respective settings. The results …

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Use Of Personal Digital Assistants (Pdas) In Medical Education, Rattiporn Luanrattana, Khin Than Win, John Fulcher Dec 2012

Use Of Personal Digital Assistants (Pdas) In Medical Education, Rattiporn Luanrattana, Khin Than Win, John Fulcher

Dr Khin Win

A systematic review of how the personal digital assistants (PDAs) have been used in healthcare professions and medical education has been conducted in order to identify current usage of PDAs in both areas. The major aim of this research is to study the feasibility of incorporating PDAs into problem-based learning (PBL) medical education. A systematic review was conducted by exploring various databases on the use of PDAs in two major areas: the healthcare professions and medical education during the period 2000-2006. Results: The needs, patterns and functionalities of using PDAs in the medical profession have been identified and categorized into …

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Lifespan Theorem For Constrained Surface Diffusion Flows, James Mccoy, Glen Wheeler, Graham Williams Dec 2012

Lifespan Theorem For Constrained Surface Diffusion Flows, James Mccoy, Glen Wheeler, Graham Williams

Professor Graham Williams

We consider closed immersed hypersurfaces in R^3 and R^4 evolving by a class of constrained surface diffusion flows. Our result, similar to earlier results for the Willmore flow, gives both a positive lower bound on the time for which a smooth solution exists and a small upper bound on a power of the total curvature during this time. By phrasing the theorem in terms of concentration of curvature in the initial surface, our result holds for very general initial data and has applications to further development in asymptotic analysis for these flows.

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Automatic Recognition Of Smiling And Neutral Facial Expressions, Peiyao Li, S Phung, Abdesselam Bouzerdoum, Fok Hing Chi Tivive Dec 2012

Automatic Recognition Of Smiling And Neutral Facial Expressions, Peiyao Li, S Phung, Abdesselam Bouzerdoum, Fok Hing Chi Tivive

Dr Fok Hing Chi Tivive

Facial expression is one way humans convey their emotional states. Accurate recognition of facial expressions via image analysis plays a vital role in perceptual human computer interaction, robotics and online games. This paper focuses on recognising the smiling from the neutral facial expression. We propose a face alignment method to address the localisation error in existing face detection methods. In this paper, smiling and neutral facial expression are differentiated using a novel neural architecture that combines fixed and adaptive non-linear 2-D filters. The fixed filters are used to extract primitive features, whereas the adaptive filters are trained to extract more …

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A Study Of The Status And Future Of Superconducting Magnetic Energy Storage In Power Systems, X Xue, Eric Cheng, Danny Sutanto Dec 2012

A Study Of The Status And Future Of Superconducting Magnetic Energy Storage In Power Systems, X Xue, Eric Cheng, Danny Sutanto

Professor Darmawan Sutanto

Superconducting magnetic energy storage (SMES) systems offering flexible, reliable, and fast acting power compensation are applicable to power systems to improve power system stabilities and to advance power qualities. The authors have summarized researches on SMES applications to power systems. Furthermore, various SMES applications to power systems have been described briefly and some crucial schematic diagrams and equations are given. In addition, this study presents valuable suggestions for future studies of SMES applications to power systems. Hence, this paper is helpful for co-researchers who want to know about the status of SMES applications to power systems.

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Harmonic Allocation Constant For Implementation Of As/Nzs 61000.3.6, D Robinson, Victor Gosbell, Sarath Perera Dec 2012

Harmonic Allocation Constant For Implementation Of As/Nzs 61000.3.6, D Robinson, Victor Gosbell, Sarath Perera

Dr Duane Robinson

Allocation of equal harmonic emission rights to MV customers having the same maximum demand is a key concept in the new Australian harmonic standard AS/NZS 61000.3.6 [1]. Some difficulty can arise with the application of the standard when customers are spread out along a feeder with significantly different fault levels. One proposed method of overcoming this problem is to reduce the allocation as the square root of the fault level [2]. This method requires the calculation of an allocation constant that is applied to all customers connected to the same zone substation. This paper gives a methodology for calculating the …

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A Study Of Continuous Pq Disturbance Levels In Mv/Lv Distribution Systems, Victor Gosbell, D Robinson Dec 2012

A Study Of Continuous Pq Disturbance Levels In Mv/Lv Distribution Systems, Victor Gosbell, D Robinson

Dr Duane Robinson

Distribution Network Service Providers need to be aware of the general variation of PQ disturbances across their network, from the sites as diverse as the MV bus bar of a zone substation, the end of a MV feeder, and at the near and far ends of LV mains. This paper develops an understanding of PQ variations across such a system from survey results correlated with approximate analysis used to assign a PQ disturbance ranking to each site. The work will concentrate on continuous PQ disturbances, defined as those due to load current effects, for example voltage deviations, unbalance, fluctuations and …

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Assessing The Future Of Electrical Power Engineering: A Report On Electrical Power Engineering Manpower Requirements In Australia, Victor Gosbell, D Robinson Dec 2012

Assessing The Future Of Electrical Power Engineering: A Report On Electrical Power Engineering Manpower Requirements In Australia, Victor Gosbell, D Robinson

Dr Duane Robinson

In 2001 the Electric Energy Society of Australia (EESA) developed concerns based on anecdotal evidence that there was a looming shortage of electrical power engineers in Australia. Information from the electrical power industry and academic communities was obtained through two separate survey questionnaires, a discussion workshop, and a number of submissions. This information was collated and compiled into 'Assessing the Future of Electrical Power Engineering: a Report on Electrical Power Engineering Manpower Requirements in Australia'.

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Sources Of Error In Unbalance Measurements, Victor Gosbell, H Herath, Sarath Perera, D Robinson Dec 2012

Sources Of Error In Unbalance Measurements, Victor Gosbell, H Herath, Sarath Perera, D Robinson

Dr Duane Robinson

The paper aims to assess sources of error in attempting to meet standards for the measurement and reporting of negative sequence voltage unbalance. This is of importance when making use of low performance instrumentation where three difficulties may arise: (i) rms voltages rather than the fundamental is used; (ii) the magnitude but not the phase of line-neutral voltages are available; and (iii) voltage values are averaged over a period longer than standards require. The presence of harmonics at normal levels is shown to give negligible error on unbalance calculations. When lineneutral voltages are used, and zero sequence is present, the …

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Simplicity Of C*-Algebras Associated To Row-Finite Locally Convex Higher-Rank Graphs, David Robertson, Aidan Sims Dec 2012

Simplicity Of C*-Algebras Associated To Row-Finite Locally Convex Higher-Rank Graphs, David Robertson, Aidan Sims

Dr David Robertson

In a previous work, the authors showed that the C*-algebra C*(\Lambda) of a row-finite higher-rank graph \Lambda with no sources is simple if and only if \Lambda is both cofinal and aperiodic. In this paper, we generalise this result to row-finite higher-rank graphs which are locally convex (but may contain sources). Our main tool is Farthing's "removing sources" construction which embeds a row-finite locally convex higher-rank graph in a row-finite higher-rank graph with no sources in such a way that the associated C*-algebras are Morita equivalent.

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Concept Tests For A New Wire Flying Vehicle Designed To Achieve High Horizontal Resolution Profiling In Deep Water, Chris Roman, Dave Hebert Dec 2012

Concept Tests For A New Wire Flying Vehicle Designed To Achieve High Horizontal Resolution Profiling In Deep Water, Chris Roman, Dave Hebert

Christopher N. Roman

Efficiently profiling the water column to achieve both high vertical and horizontal resolution from a moving vessel in deep water is difficult. Current solutions, such as CTD tow-yos, moving vessel profilers, and undulating tow bodies, are limited by ship speed or water depth. As a consequence, it is difficult to obtain oceanographic sections with sufficient resolution to identify many relevant scales over the deeper sections of the water column. This paper presents a new concept for a profiling vehicle that slides up and down a towed wire in a controlled manner using the lift created by wing foils. The wings …

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Generalised Diffusive Delay Logistic Equations: Semi-Analytical Solutions, H Alfifi, Timothy Marchant, M Nelson Dec 2012

Generalised Diffusive Delay Logistic Equations: Semi-Analytical Solutions, H Alfifi, Timothy Marchant, M Nelson

Associate Professor Mark Nelson

This paper considers semi-analytical solutions for a class of generalised logis- tic partial dierential equations with both point and distributed delays. Both one and two-dimensional geometries are considered. The Galerkin method is used to approximate the governing equations by a system of ordinary dierential delay equations. This method involves assuming a spatial structure for the solution and averaging to obtain the ordinary dierential delay equation models. Semi-analytical results for the stability of the system are derived with the critical parameter value, at which a Hopf bifurcation occurs, found. The results show that diusion acts to stabilise the system, compared to …

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A Fundamental Analysis Of Continuous Flow Bioreactor And Membrane Reactor Models With Tessier Kinetics, M Nelson, E Balakrishnan, H Sidhu Dec 2012

A Fundamental Analysis Of Continuous Flow Bioreactor And Membrane Reactor Models With Tessier Kinetics, M Nelson, E Balakrishnan, H Sidhu

Associate Professor Mark Nelson

In this research we analyze the steady-state operation of a continuous flow bioreactor, with or without recycle, and an idealized or nonidealized continuous flow membrane reactor. The model extends to include a fixed bed reactor where a fraction of the biomass is detached by the flow. The reaction is assumed to be governed by Tessier growth kinetics. We show that a flow reactor with idealized recycle has the same performance as an idealized membrane reactor and that the performance of a nonidealized membrane reactor is identical to that of an appropriately defined continuous flow bioreactor with nonidealized recycle. The performance …

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Time Series, Unit Roots, And Cointegration: An Introduction, Lonnie K. Stevans Dec 2012

Time Series, Unit Roots, And Cointegration: An Introduction, Lonnie K. Stevans

Lonnie K. Stevans

The econometric literature on unit roots took off after the publication of the paper by Nelson and Plosser (1982) that argued that most macroeconomic series have unit roots and that this is important for the analysis of macroeconomic policy. Yule (1926) suggested that regressions based on trending time series data can be spurious. This problem of spurious correlation was further pursued by Granger and Newbold (1974) and this also led to the development of the concept of cointegration (lack of cointegration implies spurious regression). The pathbreaking paper by Granger (1981), first presented at a conference at the University of Florida …

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Classification Of The Deletion Correcting Capabilities Of Reed–Solomon Codes Of Dimension Over Prime Fields, L. Mcaven, R. Safavi-Naini Dec 2012

Classification Of The Deletion Correcting Capabilities Of Reed–Solomon Codes Of Dimension Over Prime Fields, L. Mcaven, R. Safavi-Naini

Dr Luke McAven

Deletion correction codes have been used for transmission synchronization and, more recently, tracing pirated media. A generalized Reed-Solomon (GRS) code, denoted by GRSk(l,q,alpha,v), is a code of length l over GF(q) with qk codewords. These codes have an efficient decoding algorithm and have been widely used for error correction and detection. It was recently demonstrated that GRS codes are also capable of correcting deletions. We consider a subclass of GRS codes with dimension k=2 and q prime, and study them with respect to deletion correcting capability. We give transformations that either preserve the code or maintain its deletion correction capability. …

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Greedy Approximation Of Kernel Pca By Minimizing The Mapping Error, Peng Cheng, Wanqing Li, Philip Ogunbona Dec 2012

Greedy Approximation Of Kernel Pca By Minimizing The Mapping Error, Peng Cheng, Wanqing Li, Philip Ogunbona

Associate Professor Wanqing Li

In this paper we propose a new kernel PCA (KPCA) speed-up algorithm that aims to find a reduced KPCA to approximate the kernel mapping. The algorithm works by greedily choosing a subset of the training samples that minimizes the mean square error of the kernel mapping between the original KPCA and the reduced KPCA. Experimental results have shown that the proposed algorithm is more efficient in computation and effective with lower mapping errors than previous algorithms.

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Cmos Sensor Cross-Talk Compensation For Digital Cameras, Wanqing Li, Philip Ogunbona, Yu Shi, Igor Kharitonenko Dec 2012

Cmos Sensor Cross-Talk Compensation For Digital Cameras, Wanqing Li, Philip Ogunbona, Yu Shi, Igor Kharitonenko

Associate Professor Wanqing Li

This paper presents two algorithms for removing the cross-talk effect in CMOS sensor based color-imaging systems. The algorithms work on the Bayer raw data and have low computational complexity. Experimental results on Macbeth color chart and real images demonstrated that both algorithms can effectively eliminate the cross-talk effect and produce better quality images with conventional color interpolation and correction algorithms designed for CCD image sensors. Complexity of the algorithms is also analyzed.

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A Novel Template Matching Method For Human Detection, Duc Thanh Nguyen, Wanqing Li, Philip Ogunbona Dec 2012

A Novel Template Matching Method For Human Detection, Duc Thanh Nguyen, Wanqing Li, Philip Ogunbona

Associate Professor Wanqing Li

This paper proposes a novel weighted template matching method. It employs a generalized distance transform (GDT) and an orientation map (OM). The GDT allows us to weight the distance transform more on the strong edge points and the OM provides supplementary local orientation information for matching. Based on the matching method, a two-stage human detection method consisting of template matching and Bayesian verification is developed. Experimental results have shown that the proposed method can effectively reduce the false positive and false negative detection rates and perform superiorly in comparison to the conventional Chamfer matching method.

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A New Divide And Conquer Algorithm For Graph-Based Image And Video Segmentation, Wanqing Li, M. Shi, P. Ogunbona Dec 2012

A New Divide And Conquer Algorithm For Graph-Based Image And Video Segmentation, Wanqing Li, M. Shi, P. Ogunbona

Associate Professor Wanqing Li

The concept of the Shortest (or Minimum) Spanning Tree (SST)and Recursive SST (RSST) of an undirected weighted graph has been successfully applied in image segmentation and edge detection. This paper presents a divide-and-conquer approach for (R)SST based image segmentation in order to over-come the problem of high computational complexity associated with conventional graph algorithms. In the simplest form, the proposed approach, block-based RSST (BRSST), first divides the image into rectangular blocks, finds the (R)SST of each block individually using conventional graph algorithms and, then, merges the (R) SSTs of all image blocks to form an (R)SST of the entire image. …

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Novel Architecture For Surveillance Cameras With Complementary Metal Oxide Semiconductor Image Sensors, Igor Kharitonenko, Wanqing Li, Chaminda Weerasinghe Dec 2012

Novel Architecture For Surveillance Cameras With Complementary Metal Oxide Semiconductor Image Sensors, Igor Kharitonenko, Wanqing Li, Chaminda Weerasinghe

Dr Igor Kharitonenko

This work presents a novel architecture of an intelligent video surveillance camera. It is embedded with automated scene analysis and object behavior detection, so that operators can monitor more venues relying on the system that provides immediate response to suspicious events. The developed camera turns passive video data recording systems into active collaborators with security operators leaving to them only high-level decision making, while automatically carrying out all monotonous work on continuous video monitoring. When there is no alarming activity inside a restricted area the camera automatically turns back to the whole view mode.

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The Graph Neural Network Model, Franco Scarselli, Marco Gori, Ah Chung Tsoi, Markus Hagenbuchner, Gabriele Monfardini Dec 2012

The Graph Neural Network Model, Franco Scarselli, Marco Gori, Ah Chung Tsoi, Markus Hagenbuchner, Gabriele Monfardini

Dr Markus Hagenbuchner

Many underlying relationships among data in several areas of science and engineering, e.g. computer vision, molecular chemistry, molecular biology, pattern recognition, data mining, can be represented in terms of graphs. In this paper, we propose a new neural network model, called graph neural network (GNN) model, that extends existing neural network methods for processing the data represented in the graph domain. This GNN model, which can directly process most of the practically useful types of graphs, e.g. acyclic, cyclic, directed, un-directed, implements a transduction function $\tau(\BG,n)\in\R^m$ that maps a graph $\BG$ and one of its nodes $n$ into an m-dimensional …

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"Kernalized" Self-Organizing Maps For Structured Data, F. Aiolli, G. Da San Martino, A. Sperduti, M. Hagenbuchner Dec 2012

"Kernalized" Self-Organizing Maps For Structured Data, F. Aiolli, G. Da San Martino, A. Sperduti, M. Hagenbuchner

Dr Markus Hagenbuchner

The suitability of the well known kernels for trees, and the lesser known Self- Organizing Map for Structures for categorization tasks on structured data is investigated in this paper. It is shown that a suitable combination of the two approaches, by defining new kernels on the activation map of a Self-Organizing Map for Structures, can result in a system that is significantly more accurate for categorization tasks on structured data. The effectiveness of the proposed approach is demonstrated experimentally on a relatively large corpus of XML formatted data.

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Estimating Variance Components And Predicting Breeding Values For Eventing Disciplines And Grades In Sport Horses, I Stewart, I.M White, Arthur Gilmour, R Thompson, J Woolliams, S Brotherstone Dec 2012

Estimating Variance Components And Predicting Breeding Values For Eventing Disciplines And Grades In Sport Horses, I Stewart, I.M White, Arthur Gilmour, R Thompson, J Woolliams, S Brotherstone

Dr Arthur Gilmour

Eventing competitions in Great Britain (GB) comprise three disciplines, each split into four grades, yielding 12 discipline-grade traits. As there is a demand for tools to estimate (co)variance matrices with a large number of traits, the aim of this work was to investigate different methods to produce large (co)variance matrices using GB eventing data. Data from 1999 to 2008 were used and penalty points were converted to normal scores. A sire model was utilised to estimate fixed effects of gender, age and class, and random effects of sire, horse and rider. Three methods were used to estimate (co)variance matrices. Method …

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Rfid-Enabled Warehouse Process Optimization In The Tpl Industry, S. Wamba, A. Chatfield Dec 2012

Rfid-Enabled Warehouse Process Optimization In The Tpl Industry, S. Wamba, A. Chatfield

Dr Akemi Chatfield

Using the value chain model and a longitudinal real-world case study of a third-party logistics (TPL) supply chain, this study provides support for the enabling role of RFID technology in effecting warehouse process optimization. Furthermore, the findings of our study reveal the RFID technology implementation costs as the key inhibitors factor of RFID widespread adoption and usage among suppliers.

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Hierarchic Decomposition In Agent Oriented Conceptual Modelling, R. Brown, Aditya Ghose Dec 2012

Hierarchic Decomposition In Agent Oriented Conceptual Modelling, R. Brown, Aditya Ghose

Dr Robert Brown

Software development processes requires a thorough understanding of stakeholder objectives and requirements. Product-centrism is an insufficient stance from which to achieve greater efficiencies and reduce reengineering. Stakeholder requirement elicitation is thus worthy of formalization. A suite of tools, notably the i* model, provides a framework for early-phase requirements capture. These tools currently are at best only semiautomated and essentially consist of a notational glossary and sets of mark-up symbols. Increasing formalization may lead to greater automation of the process in the future, but currently there is a degree of flexibility that presents pitfalls for the unwary practitioner. A notion of …

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Towards Peer Selection In A Semantically-Enriched Service Execution Framework With Qos Specifications, Jun Shen, Ghassan Beydoun, Graham Low, Brian Henderson-Sellers, Shuai Yuan Dec 2012

Towards Peer Selection In A Semantically-Enriched Service Execution Framework With Qos Specifications, Jun Shen, Ghassan Beydoun, Graham Low, Brian Henderson-Sellers, Shuai Yuan

Associate Professor Ghassan Beydoun

This paper promotes an ontology-based multi agent system (MAS) framework to facilitate Peer-to-Peer (P2P) service selection with multiple service properties. P2P-based service has emerged as an important new field in the distributed computing arena. It focuses on intensive service sharing, innovative applications and compositions, and, in some cases, high performance orientation. However, one of the remaining challenges for the P2P-based service composition process is how to effectively discover and select the most appropriate peers to execute the service applications when considering multiple properties of the requested services. By introducing an ontology, different ontology-based e-service profiles can be proposed to facilitate …

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Distrust, Fear And Emotional Learning: An Online Auction Perspective, Glenn Bewsell Dec 2012

Distrust, Fear And Emotional Learning: An Online Auction Perspective, Glenn Bewsell

Dr Glenn Bewsell

This exploratory research explores the emotional perspective of online distrust, where distrust is a fear. Fear is one of the negative emotions where the situational state is motive-inconsistent and uncertainty is present. A review of literature explores distrust as a fear, emotions, emotional learning and identifies cognitive dimensions consistent with fear. These cognitive dimensions are motive-inconsistent situational state, uncertainty, goal-path obstacle, effort, and agency/control. Textual data is collected from an online auction community website to support this research. The dimensions consistent with fear are identified within the data collected and analyzed using qualitative analysis. Goal-path obstacles are identified within the …

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The Challenges For The Adoption Of M-Health, Ping Yu, M. Wu, H. Yu, G. Xiao Dec 2012

The Challenges For The Adoption Of M-Health, Ping Yu, M. Wu, H. Yu, G. Xiao

Dr Ping Yu

The potential benefit of mobile and wireless information technology for healthcare service delivery, improving patient safety and reducing cost is increasingly recognized and emphasized. To contributing to the knowledge about critical factors determining the success of mobile health (m-Health) solutions, this study researched the driving force for the advancement of m-health solutions. The current advancement of m-health was reviewed. The challenges for developing and deploying m-health applications were addressed. The paper concluded in suggesting the most critical factor for the success of m-health. The method used for the study was literature research, market scan and analysis.

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Nursing Information Systems: Applying Usability Testing To Assess The Training Needs For Nursing Students, Yiyu Qiu, Ping Yu Dec 2012

Nursing Information Systems: Applying Usability Testing To Assess The Training Needs For Nursing Students, Yiyu Qiu, Ping Yu

Dr Ping Yu

Objective: In order to ensure the successful implementation of a nursing information system (NIS), nurses and nursing students must be adequately trained. In order to do this effectively, it is essential to understand their training needs. This study focuses on the training needs of nursing students in particular through the identification of the usage problems they encounter. Usability testing, which involves observing users' interaction with an NIS, overcomes the deficiencies of traditional approaches of training needs analysis such as interview and survey. The study applied usability test to assess training needs of nursing students to learn to use a specific …

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