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2012

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Articles 91 - 120 of 12196

Full-Text Articles in Physical Sciences and Mathematics

Evaluating The Implementation Of Emr Systems From The Perspective Of Health Professionals, Yung-Yu Su, John A. Fulcher, Khin Than Win, Herng-Chia Chiu, Gui-Fen Chiu Dec 2012

Evaluating The Implementation Of Emr Systems From The Perspective Of Health Professionals, Yung-Yu Su, John A. Fulcher, Khin Than Win, Herng-Chia Chiu, Gui-Fen Chiu

Dr Khin Win

In health informatics, the "updated DeLone and McLean IS success model" is reviewed as a mature model in measuring health information system (HIS) success. This research provided an evaluation model to estimate the implementation of electronic medical records (EMR) systems from a health professional perspective by combined the updated DeLone and McLean IS success model, data quality management model, and EMR systems safety attributes. Based on evidence-based management (EBM), this research could be regarded as an empirical example for further EMR systems research since it not only provided a model to measure the Taiwanese EMR systems in two hospitals by …

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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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Analyzing The Key Variables In The Adoption Process Of Hl7, Alejandro E. Flores Zuniga, Khin Than Win Dec 2012

Analyzing The Key Variables In The Adoption Process Of Hl7, Alejandro E. Flores Zuniga, Khin Than Win

Dr Khin Win

The intention of this paper is to provide an analysis of variables that could affect the adoption of HL7 message standard. Based on the review of 33 cases where HL7 was successfully implemented the authors present relevant evidence related to inherent limitation of HL7. The result from this study indicates that it is necessary to enhance the standard to overcome particular limitations and facilitate the implementation of inter-institutional software interfaces based on HL7.

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Consent Mechanisms For Electronic Health Record Systems: A Simple Yet Unresolved Issue, Khin Than Win, John Fulcher Dec 2012

Consent Mechanisms For Electronic Health Record Systems: A Simple Yet Unresolved Issue, Khin Than Win, John Fulcher

Dr Khin Win

No abstract provided.

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A Review Of Telemedicine In Developing Countries: Introduction And Implementation Issues, Khin Than Win, Nurazean Maarop Dec 2012

A Review Of Telemedicine In Developing Countries: Introduction And Implementation Issues, Khin Than Win, Nurazean Maarop

Dr Khin Win

No abstract provided.

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Evolving Gene Frequencies In A Population With Three Possible Alleles At A Locus, B H Bradshaw-Hajek, Philip Broadbridge, Graham Williams Dec 2012

Evolving Gene Frequencies In A Population With Three Possible Alleles At A Locus, B H Bradshaw-Hajek, Philip Broadbridge, Graham Williams

Professor Graham Williams

A number of models involving reactiondiffusion equations have been developed by different authors to describe the changes in frequency of alleles in a population. Each of these models describes the case in which there are only two possible alleles at the locus in question. In the present paper, we are interested in the more realistic possibility of three alternative alleles. A system of reactiondiffusion equations can be developed to describe this situation. After transforming to the traveling wave coordinates, we introduce a nonlinear transformation which allows us to find exact solutions under certain conditions imposed on two of the parameters.

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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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The Path Space Of A Higher-Rank Graph, Samuel B. Webster Dec 2012

The Path Space Of A Higher-Rank Graph, Samuel B. Webster

Dr Samuel Webster

We construct a locally compact Hausdorff topology on the path space of a finitely aligned k -graph Λ . We identify the boundary-path space ∂Λ as the spectrum of a commutative C ∗ -subalgebra D Λ of C ∗ (Λ) . Then, using a construction similar to that of Farthing, we construct a finitely aligned k -graph Λ ˜ with no sources in which Λ is embedded, and show that ∂Λ is homeomorphic to a subset of ∂Λ ˜ . We show that when Λ is row-finite, we can identify C ∗ (Λ) with a full corner of C ∗ …

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Child's Addition In The Stern-Brocot Tree, Bruce Bates, Martin Bunder, Keith Tognetti Dec 2012

Child's Addition In The Stern-Brocot Tree, Bruce Bates, Martin Bunder, Keith Tognetti

Dr Keith Tognetti

We use child's addition and cross-differencing to discover significant relationships for diagonals, paths and branches within the Stern-Brocot tree and the Stern-Brocot sequence. This allows us to develop results for continued fraction summation under child's addition.

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On Binary Reflected Gray Codes And Functions, Martin W. Bunder, Keith P. Tognetti, Glen Wheeler Dec 2012

On Binary Reflected Gray Codes And Functions, Martin W. Bunder, Keith P. Tognetti, Glen Wheeler

Dr Keith Tognetti

The Binary Reflected Gray Code function b is defined as follows: If m is a nonnegative integer, then b(m) is the integer obtained when initial zeros are omitted from the binary reflected Gray code of length m. This paper examines this Gray code function and its inverse and gives simple algorithms to generate both. It also simplifies Conder’s result that the jth letter of the kth word of the binary reflected Gray code of length n, is (2n − 2n−j − 1 [2n − 2n−j−1 − k/2]) mod 2, by replacing the binomial coefficient by [(k-1)/(2n-j+1)+1/2].

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Fuzzy Logic-Based Image Fusion For Multi-View Through-The-Wall Radar, Cher Hau Seng, Abdesselam Bouzerdoum, Fok Hing Chi Tivive, Moeness G. Amin Dec 2012

Fuzzy Logic-Based Image Fusion For Multi-View Through-The-Wall Radar, Cher Hau Seng, Abdesselam Bouzerdoum, Fok Hing Chi Tivive, Moeness G. Amin

Dr Fok Hing Chi Tivive

In this paper, we propose a new technique for image fusion in multi-view through-the-wall radar imaging system. As most existing image fusion methods for through-the-wall radar imaging only consider a global fusion operator, it is desirable to consider the differences between each pixel using a local operator. Here, we present a fuzzy logic-based method for pixel-wise image fusion. The performance of the proposed method is evaluated on both simulated and real data from through-the-wall radar imaging system. Experimental results show that the proposed method yields improved performance, compared to existing methods.

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A Gender Recognition System Using Shunting Inhibitory Convolutional Neural Networks, Fok Hing Chi Tivive, Abdesselam Bouzerdoum Dec 2012

A Gender Recognition System Using Shunting Inhibitory Convolutional Neural Networks, Fok Hing Chi Tivive, Abdesselam Bouzerdoum

Dr Fok Hing Chi Tivive

In this paper, we employ shunting inhibitory convolutional neural networks to develop an automatic gender recognition system. The system comprises two modules: a face detector and a gender classifier. The human faces are first detected and localized in the input image. Each detected face is then passed to the gender classifier to determine whether it is a male or female. Both the face detection and gender classification modules employ the same neural network architecture; however, the two modules are trained separately to extract different features for face detection and gender classification. Tested on two different databases, Web and BioID database, …

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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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Automatic Classification Of Human Motions Using Doppler Radar, Jingli Li, Son Lam Phung, Fok Hing Chi Tivive, Abdesselam Bouzerdoum Dec 2012

Automatic Classification Of Human Motions Using Doppler Radar, Jingli Li, Son Lam Phung, Fok Hing Chi Tivive, Abdesselam Bouzerdoum

Dr Fok Hing Chi Tivive

This paper presents a new approach to classify human motions using a Doppler radar for applications in security and surveillance. Traditionally, the Doppler radar is an effective tool for detecting the position and velocity of a moving target, even in adverse weather conditions and from a long range. In this paper, we are interested in using the Doppler radar to recognize the micro-motions exhibited by people. In the proposed approach, a frequency modulated continuous wave radar is applied to scan the target, and the short-time Fourier transform is used to convert the radar signal into spectrogram. Then, the new two-directional, …

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Automatic Human Motion Classification From Doppler Spectrograms, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness G. Amin Dec 2012

Automatic Human Motion Classification From Doppler Spectrograms, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness G. Amin

Dr Fok Hing Chi Tivive

No abstract provided.

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Adaptive Hierarchical Architecture For Visual Recognition, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Son Lam Phung, Khan M. Iftekharuddin Dec 2012

Adaptive Hierarchical Architecture For Visual Recognition, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Son Lam Phung, Khan M. Iftekharuddin

Dr Fok Hing Chi Tivive

We propose a new hierarchical architecture for visual pattern classification. The new architecture consists of a set of fixed, directional filters and a set of adaptive filters arranged in a cascade structure. The fixed filters are used to extract primitive features such as orientations and edges that are present in a wide range of objects, whereas the adaptive filters can be trained to find complex features that are specific to a given object. Both types of filters are based on the biological mechanism of shunting inhibition. The proposed architecture is applied to two problems: pedestrian detection and car detection. Evaluation …

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Improved Facial Expression Recognition With Trainable 2-D Filters And Support Vector Machines, Peiyao Li, Son Lam Phung, Abdesselam Bouzerdoum, Fok Hing Chi Tivive Dec 2012

Improved Facial Expression Recognition With Trainable 2-D Filters And Support Vector Machines, Peiyao Li, Son Lam 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 is essential in perceptual human-computer interface, robotics and mimetic games. This paper presents a novel approach to facial expression recognition from static images that combines fixed and adaptive 2-D filters in a hierarchical structure. The fixed filters are used to extract primitive features. They are followed by the adaptive filters that are trained to extract more complex facial features. Both types of filters are non-linear and are based on the biological mechanism of shunting inhibition. The features are finally classified by a support vector machine. …

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A Car Detection System Based On Hierarchical Visual Features, Fok Hing Chi Tivive, Abdesselam Bouzerdoum Dec 2012

A Car Detection System Based On Hierarchical Visual Features, Fok Hing Chi Tivive, Abdesselam Bouzerdoum

Dr Fok Hing Chi Tivive

In this paper, we address the problem of detecting and localizing cars in still images. The proposed car detection system is based on a hierarchical feature detector in which the processing units are shunting inhibitory neurons. To reduce the training time and complexity of the network, the shunting inhibitory neurons in the first layer are implemented as directional nonlinear filters, whereas the neurons in the second layer have trainable parameters. A multi-resolution processing scheme is implemented so as to detect cars of different sizes, and to reduce the number of false positives during the detection stage, an adaptive thresholding strategy …

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A Shunting Inhibitory Convolutional Neural Network For Gender Classification, Fok Hing Chi Tivive, Abdesselam Bouzerdoum Dec 2012

A Shunting Inhibitory Convolutional Neural Network For Gender Classification, Fok Hing Chi Tivive, Abdesselam Bouzerdoum

Dr Fok Hing Chi Tivive

Demographic features, such as gender, are very important for human recognition and can be used to enhance social and biometric applications. In this paper, we propose to use a class of convolutional neural networks for gender classification. These networks are built upon the concepts of local receptive field processing and weight sharing, which makes them more tolerant to distortions and variations in two dimensional shapes. Tested on two separate data sets, the proposed networks achieve better classification accuracy than the conventional feedforward multilayer perceptron networks. On the Feret benchmark dataset, the proposed convolutional neural networks achieve a classification rate of …

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A Human Gait Classification Method Based On Radar Doppler Spectrograms, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness G. Amin Dec 2012

A Human Gait Classification Method Based On Radar Doppler Spectrograms, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness G. Amin

Dr Fok Hing Chi Tivive

An image classification technique, which has recently been introduced for visual pattern recognition, is successfully applied for human gait classification based on radar Doppler signatures depicted in the time-frequency domain. The proposed method has three processing stages. The first two stages are designed to extract Doppler features that can effectively characterize humanmotion based on the nature of arm swings, and the third stage performs classification. Three types of arm motion are considered: free-arm swings, one-arm confined swings, and no-arm swings. The last two arm motions can be indicative of a human carrying objects or a person in stressed situations. The …

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Feature Selection For Facial Expression Recognition, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive, Peiyao Li Dec 2012

Feature Selection For Facial Expression Recognition, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive, Peiyao Li

Dr Fok Hing Chi Tivive

In daily interactions, humans convey their emotions through facial expression and other means. There are several facial expressions that reflect distinctive psychological activities such as happiness, surprise or anger. Accurate recognition of these activities via facial image analysis will play a vital role in natural human-computer interfaces, robotics and mimetic games. This paper focuses on the extraction and selection of salient features for facial expression recognition. We introduce a cascade of fixed filters and trainable non-linear 2-D filters, which are based on the biological mechanism of shunting inhibition. The fixed filters are used to extract primitive features, whereas the adaptive …

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Understanding The Adoption Of Clusters By Smes Using Innovation Theory, Y. R. Kim Chung, William Tibben Dec 2012

Understanding The Adoption Of Clusters By Smes Using Innovation Theory, Y. R. Kim Chung, William Tibben

Dr William Tibben

SMEs-clustering has been of considerable interest over the last decade and is associated with regional development. The Australian government advocates the formation of SMEs cluster thereby encouraging SMEs to achieve competitive advantage through globalisation. However, the notion of SMEs clusters involves some issues in terms of its adoption by SMEs. Firstly, most academic research shows that SMEs cluster has been treated as a phenomenon in the economy and that its foundation lacks a theoretical perspective. Secondly, there is a lack of understanding of SME clusters in general. Much of the literature on SMEs and clusters has primarily addressed the benefit …

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Towards Greater Systemisation In Ci Research: An Exploration Of Social Development As A Framework For Comparison And Understanding, William Tibben Dec 2012

Towards Greater Systemisation In Ci Research: An Exploration Of Social Development As A Framework For Comparison And Understanding, William Tibben

Dr William Tibben

The theme of complexity alludes to the difficulties community informatics (CI) researchers face when analysing use of ICTs by communities. In response, de Moor (2009a, 2009b) and Stillman (2010) identify the need for greater systemisation of CI research that enables complex socio-technical processes to be analysed over multiple cases. The principle by which such systemisation should occur is open to debate. It seems improbable that a single theoretical approach, at least in the short term, is going to satisfy everyone as greater systemisation is pursued. The paper suggests that, as a first step, efforts should be devoted to better appreciation …

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Towards Knowledge Management In Sports Event Management: Context Analysis Of Malaysian Biannual Games With Commonkads, Azizul Rahman Abdul Ghaffar, Ghassan Beydoun, Jun Shen, William Tibben Dec 2012

Towards Knowledge Management In Sports Event Management: Context Analysis Of Malaysian Biannual Games With Commonkads, Azizul Rahman Abdul Ghaffar, Ghassan Beydoun, Jun Shen, William Tibben

Dr William Tibben

Context Analysis (CA) is typically used as an early phase preceding the development of a knowledge-based systems in order to indicate how the system should interact with its environment and the various stakeholders. We undertake a detailed context analysis of business processes of the Malaysian Games (MG)to highlight blind spots of the process and enable the identification of an initial sports event knowledge management (KM) framework. Firstly, our CommonKADS driven analysis highlights how we can improve the business process and enable the organization to develop, distribute and apply its knowledge resources effectively. Secondly, the paper highlights specific features about the …

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Strategies For Implementing A Converged Ict Regulator In Indonesia, Yudhistra Nughara, William Tibben Dec 2012

Strategies For Implementing A Converged Ict Regulator In Indonesia, Yudhistra Nughara, William Tibben

Dr William Tibben

This paper draws on a six month study that aimed to broadly clarify strategies for the IndonesianGovernment to address the issue of convergence. This paper reports on one aspect of this study thatmaps stakeholder policymaker opinions about a future converged regulator in Indonesia.Convergence refers to a trend in regulation that seeks to define a single regulatory structure fortelecommunications, broadcasting and information technology. In particular, the specific aims ofthis study were to examine regulatory structures with regard to two parameters derived from theInternational Telecommunications Union (ITU): the level of independence, and institutional design.Using benchmarking as a method, three case studies of …

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A Communications Policy Perspective On Ctc Sustainability In Regional Australia: Normative Assumptions, Commercial Viability And Social Good, William Tibben Dec 2012

A Communications Policy Perspective On Ctc Sustainability In Regional Australia: Normative Assumptions, Commercial Viability And Social Good, William Tibben

Dr William Tibben

This paper investigates the influence of the normative assumptions that can be associated with the Community Technology Centers (CTCs) scheme in New South Wales, Australia during the period 2000-2005 (CTC@NSW). It does this by developing an analytical framework based on Australian communications policy to assess case study accounts of selected CTCs. In drawing conclusions about the normative assumptions that guided the implementation of the CTC@NSW scheme, the sufficiency of market based development strategies are questioned when challenging economic circumstances suggest the need for ongoing strategic assistance from government.

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A Theoretical Justification For Partnerships In Community Technology Centre Projects, William Tibben Dec 2012

A Theoretical Justification For Partnerships In Community Technology Centre Projects, William Tibben

Dr William Tibben

In many Community Technology Centre projects, partnerships are emerging as a fundamentally important aspect to achieving sustainability. While generally considered a less formal approach than direct funding from rich benefactors such as Government or philanthropic organisations, the paper argues that partnerships offer an effective and theoretically justifiable framework to achieving sustainability. Drawing on information based perspectives the paper proposes a theoretical justification for the use of partnerships in community informatics projects that is able to incorporate individuals and groups in the analysis.

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Petawatt-Laser-Driven Wakefield Acceleration Of Electrons To 2 Gev In 10^{17} Cm^{-3} Plasma, Xiaoming Wang, Rafal B. Zgadzaj, Neil Fazel, Sunghwan A. Yi, X. Zhang, Watson Henderson, Yen-Yu Zhang, Rick Korzekwa, Hai-En Tsai, C.-H. Pai, Zhengyan Li, Hernan Quevedo, Gilliss Dyer, Erhard W. Gaul, Mikael Martinez, Aaron Bernstein, Ted Borger, M. Spinks, M. Donovan, Serguei Y. Kalmykov, Vladimir N. Khudik, Gennady Shvets, Todd Ditmire, Michael C. Downer Dec 2012

Petawatt-Laser-Driven Wakefield Acceleration Of Electrons To 2 Gev In 10^{17} Cm^{-3} Plasma, Xiaoming Wang, Rafal B. Zgadzaj, Neil Fazel, Sunghwan A. Yi, X. Zhang, Watson Henderson, Yen-Yu Zhang, Rick Korzekwa, Hai-En Tsai, C.-H. Pai, Zhengyan Li, Hernan Quevedo, Gilliss Dyer, Erhard W. Gaul, Mikael Martinez, Aaron Bernstein, Ted Borger, M. Spinks, M. Donovan, Serguei Y. Kalmykov, Vladimir N. Khudik, Gennady Shvets, Todd Ditmire, Michael C. Downer

Serge Youri Kalmykov

Electron self-injection into a laser-plasma accelerator (LPA) driven by the Texas Petawatt (TPW) laser is reported at plasma densities 1.7 - 6.2 x 10^{17} cm^{-3}. Energy and charge of the electron beam, ranging from 0.5 GeV to 2 GeV and tens to hundreds of pC, respectively, depended strongly on laser beam quality and plasma density. Angular beam divergence was consistently around 0.5 mrad (FWHM), while shot-to-shot pointing fluctuations were limited to ±1.4 mrad rms. Betatron x-rays with tens of keV photon energy are also clearly observed.

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Sub-Millimeter-Scale, 100-Mev-Class Quasi-Monoenergetic Laser Plasma Accelerator Based On All-Optical Control Of Dark Current In The Blowout Regime, Serguei Y. Kalmykov, Xavier Davoine, Bradley A. Shadwick Dec 2012

Sub-Millimeter-Scale, 100-Mev-Class Quasi-Monoenergetic Laser Plasma Accelerator Based On All-Optical Control Of Dark Current In The Blowout Regime, Serguei Y. Kalmykov, Xavier Davoine, Bradley A. Shadwick

Serge Youri Kalmykov

It is demonstrated that by negatively chirping the frequency of a 20-fs, 15-TW driving laser pulse with an ultrabroad bandwidth (corresponding to a sub-2-cycle transform-limited duration it is possible to prevent early compression of the pulse into an optical shock, thus reducing expansion of the accelerating plasma bucket (electron density "bubble") and delaying dephasing of self-injected and accelerated electrons. These features help suppress unwanted continuous self-injection (dark current) in the blowout regime, making possible to use the entire dephasing length to generate low-background, quasi-monoenergetic 200-MeV-scale electron beams from sub-mm-length, dense plasmas (n_{e0} = 1.3 x 10^{19} cm^{−3}).

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