Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- For (10)
- Ethics (7)
- Data (6)
- Using (6)
- Privacy (5)
-
- Based (4)
- Evaluation (4)
- Networks (4)
- Security (4)
- Systems (4)
- UWB (4)
- Algorithm (3)
- Analysis (3)
- Approach (3)
- Automatic identification (3)
- Biometrics (3)
- Digital rights management (3)
- Equalization (3)
- Location-based services (3)
- MB-OFDM (3)
- Monitoring (3)
- National security (3)
- Performance (3)
- Self (3)
- Tracking (3)
- Ultra-wideband (3)
- Vertical (3)
- Wireless (3)
- 15A36. (2)
- Adoption (2)
Articles 181 - 210 of 222
Full-Text Articles in Entire DC Network
An Application Of Elementary Functions To A Resource Allocation Problem, R. Nillsen
An Application Of Elementary Functions To A Resource Allocation Problem, R. Nillsen
Faculty of Informatics - Papers (Archive)
This paper looks at a problem of resource allocation and analyses the changes and their implications when a particular method of resource allocation is changed, by altering the relative importance of two criteria. The situation considered in the paper arose specifically in the West Report on higher education in Australia (1998), where the possibility of altering the relative importance of research and teaching in allocating university funds in Australia was raised. This possibility was the subject of an article in The Australian newspaper by David Phillips, a former Head of the Higher Education Division in the Department of Employment, Education, …
An Application Of Quadratic Functions To Australian Government Policy On Funding Schools, R. Nillsen
An Application Of Quadratic Functions To Australian Government Policy On Funding Schools, R. Nillsen
Faculty of Informatics - Papers (Archive)
In the Sydney Morning Herald newspaper of 23rd March 2005 the economics writer Ross Gittins argued that the funding arrangements for private schools in Australia positively encourage parents to move their children from the state system to the private system. The Federal minister, Dr Brendan Nelson, responded by saying that the policy of subsidising pupils who go to a private school results in taxpayer savings of $4 billion. However, the minister's response did not address the extent to which more funds could possibly be saved by having a different subsidy from the one currently offered by the government. Now, there …
A Closed-Form Analytical Solution For The Valuation Of Convertible Bonds With Constant Dividend Yield, Song-Ping Zhu
A Closed-Form Analytical Solution For The Valuation Of Convertible Bonds With Constant Dividend Yield, Song-Ping Zhu
Faculty of Informatics - Papers (Archive)
In this paper, a closed-form analytical solution for pricing convertible bonds on a single underlying asset with constant dividend yield is presented. To the au- thor’s best knowledge, never has a closed-form analytical formula been found for American-style convertible bonds (CBs) of finite maturity time although there have been quite a few approximate solutions and numerical approaches proposed. The solution presented here is written in the form of a Taylor’s series expansion, which 1 contains infinitely many terms, and thus is completely analytical and in a closed form. Although it is only for simplest CBs without call or put features, …
Pricing Convertible Bonds Based On A Multi-Stage Compound Option Model, P. Gong, Z. He, Song-Ping Zhu
Pricing Convertible Bonds Based On A Multi-Stage Compound Option Model, P. Gong, Z. He, Song-Ping Zhu
Faculty of Informatics - Papers (Archive)
In this paper, we introduce the concept of multi-stage compound options to the valuation of convertible bonds. Rather than evaluating a nested high-dimensional integral that has arisen from the valuation of multi-stage compound options, we found that adopting the Finite Difference Method (FDM) to solve the Black-Scholes equation for each stage actually resulted in a better numerical efficiency. By comparing our results with those obtained by solving the Black-Scholes equation directly, we can show that the new approach does provide an approximation approach for the valuation of convertible bonds and demonstrate that it offers a great potential for a further …
Mobility Management For Untethered Immersive Communications, Mehran Dowlatshahi, Farzad Safaei
Mobility Management For Untethered Immersive Communications, Mehran Dowlatshahi, Farzad Safaei
Faculty of Informatics - Papers (Archive)
In this paper we propose a system design for delivery of immersive communications to mobile wireless devices based on a distributed proxy model. It is demonstrated that this architecture addresses key technical challenges for the delivery of these services, that is, constraints on link capacity and power consumption in mobile devices. However, additional complexity is introduced with respect to mobility management. The paper proposes three possible methods for updating proxy assignments in response to mobility and compares the performance of these methods.
Multipoint Interactive Communication For Peer To Peer Environments, Mehran Dowlatshahi, Farzad Safaei
Multipoint Interactive Communication For Peer To Peer Environments, Mehran Dowlatshahi, Farzad Safaei
Faculty of Informatics - Papers (Archive)
In this paper a scheme for peer-to-peer (p2p) multiparty voice communication is proposed. The paper considers realistic constraints on the upstream and downstream bandwidth of peers and their processing capacity. We propose a novel mechanism for distributed mixing of the audio streams that can improve the scalability of this service while meeting the capacity constraints. The paper also proposes an algorithm to form a multipoint-to-multipoint spanning tree (MMST) among the peers within a communication zone. The simulation results show that the performance of algorithm in terms of delay stretch and its impact on bandwidth reduction in comparison to multiple source …
Image Content Annotation Based On Visual Features, Lei Ye, Philip Ogunbona, J. Wang
Image Content Annotation Based On Visual Features, Lei Ye, Philip Ogunbona, J. Wang
Faculty of Informatics - Papers (Archive)
Automatic image content annotation techniques attempt to explore structural visual features of images that describe image content and associate them with image semantics. In this paper, two types of concept spaces, atomic concept and collective concept spaces, are defined and the annotation problems in those spaces are formulated as feature classification and Bayesian inference, respectively. A scheme of image content annotation in this framework is presented and evaluated as an application of photo categorization using MPEG-7 VCE2 dataset and its ground truth. The experimental results show a promising performance.
Managing Latency And Fairness In Networked Games, J. Brun, Farzad Safaei, P. Boustead
Managing Latency And Fairness In Networked Games, J. Brun, Farzad Safaei, P. Boustead
Faculty of Informatics - Papers (Archive)
Networked games can be seen as forerunners of all kinds of participatory entertainment applications delivered through the Internet. Physically dispersed players are immersed in a common virtual environment where they interact in real time. When a user performs an action, other users must be made aware of that action. Otherwise, there is a discrepancy in the perceptions of participants about the overall state of the virtual world. This discrepancy could lead to undesirable and sometimes paradoxical outcomes. In particular, first-person shooter, and to a lesser extent role-playing games impose stringent constraints on responsiveness and consistency.
New Constructing Of Regular Hadamard Matrices, Tianbing Xia, Jennifer Seberry, M. Xia
New Constructing Of Regular Hadamard Matrices, Tianbing Xia, Jennifer Seberry, M. Xia
Faculty of Informatics - Papers (Archive)
For every prime power q ≡ 7 mod 16, we obtain the (q; a, b, c, d)–partitions of G F (q), with odd integers a, b, c, d, a ≡ ± 1 mod 8 such that q = a2 + 2(b2 + c2 + d2) and d2 = b2 + 2ac + 2bd. Hence for each value of q the construction of SDS becomes equivalent to building a (q; a, b, c, d)–partition. The latter is much easier than the former. We give …
Electronic Versus Paper-Based Nursing Documentation Systems: The Caregivers Weigh In, Ping Yu
Electronic Versus Paper-Based Nursing Documentation Systems: The Caregivers Weigh In, Ping Yu
Faculty of Informatics - Papers (Archive)
Information technology (IT) solutions have the potential to free carers in long-term care facilities from well-known problems with burdensome paper-documentation, allow them more direct care-time with clients and improve the quality of nursing records. However, to date, little scientific evidence is available to support this idea. Besides the concern about return on investment, a big barrier for the slow uptake of IT solutions in long-term care1 is scepticism by managers about the capacity and willingness of older carers, most of them women, to use computers and the uncertainty about the potential change associated with introducing a new system. To my …
Accounting For The Uncertainty Of Information On Clustering In The Design Of A Clustered Sample, David G. Steel, Robert Graham Clark
Accounting For The Uncertainty Of Information On Clustering In The Design Of A Clustered Sample, David G. Steel, Robert Graham Clark
Faculty of Informatics - Papers (Archive)
An important decision that has to be made in developing the design of a cluster or multi-stage sampling scheme is the number of units to select at each stage of selection. For a two-stage design we need to decide the number of units to select from each Primary Sampling Unit (PSU) in the sample. A common approach is to estimate the costs and the variance components associated with each stage of selection and determine an optimal design. This is usually done for estimates of the means or totals of one or a small number of variables. In practice the measure …
The Risk Of Public Data Availability On Critical Infrastructure Protection, Roba Abbas
The Risk Of Public Data Availability On Critical Infrastructure Protection, Roba Abbas
Faculty of Informatics - Papers (Archive)
This paper examines the threat of freely available information on critical infrastructure protection (CIP) efforts. Critical infrastructure are the services required to maintain the stability and security of a country, and comprise both physical and cyber infrastructures. These interdependent entities must be protected from natural disasters, accidental errors, and deliberate attacks. The CIP process typically includes vulnerability assessment, risk assessment and risk management, and has been a global concern for many years; the concern now amplified in Australia due to a number of recent events such the 9/11 attacks, and the Bali bombings. The events have called into question the …
Electronic Health Record System Evaluation Based On Patient Safety, Yung-Yu Su, Khin Than Win, John A. Fulcher
Electronic Health Record System Evaluation Based On Patient Safety, Yung-Yu Su, Khin Than Win, John A. Fulcher
Faculty of Informatics - Papers (Archive)
After describing the general characteristics of Electronic Health Records (EHRs), we consider patient safety. We then proceed to discuss IS evaluation in general terms, followed by HIS system evaluation in particular. The D&M IS Success model, Technology Acceptance model and Task-Technology Fit model are considered as potential candidates for EHR System evaluation. Based upon a critical review of the available literature, we draw some conclusions about the appropriateness of current HIS/EHR evaluation approaches. Finally, we suggest that by incorporating patient safety attributes in any EHR System evaluation framework, then this could lead to improved accuracy, and in turn improved patient …
Fitness Evaluation For Structural Optimisation Genetic Algorithms Using Neural Networks, Koren Ward, Timothy J. Mccarthy
Fitness Evaluation For Structural Optimisation Genetic Algorithms Using Neural Networks, Koren Ward, Timothy J. Mccarthy
Faculty of Informatics - Papers (Archive)
This paper relates to the optimisation of structural design using Genetic Algorithms (GAs) and presents an improved method for determining the fitness of genetic codes that represent possible design solutions by using a neural network to generalize fitness. Two problems that often impede design optimization using genetic algorithms are expensive fitness evaluation and high epistasis. In this paper we show that by using a neural network as a fitness approximator, optimal solutions to certain design problems can be achieved in significantly less generations and with considerably less fitness evaluations.
Analyzing Harmonic Monitoring Data Using Data Mining, Ali Asheibi, David A. Stirling, Danny Sutanto
Analyzing Harmonic Monitoring Data Using Data Mining, Ali Asheibi, David A. Stirling, Danny Sutanto
Faculty of Informatics - Papers (Archive)
Harmonic monitoring has become an important tool for harmonic management in distribution systems. A comprehensive harmonic monitoring program has been designed and implemented on a typical electrical MV distribution system in Australia. The monitoring program involved measurements of the three-phase harmonic currents and voltages from the residential, commercial and industrial load sectors. Data over a three year period has been downloaded and available for analysis. The large amount of acquired data makes it difficult to identify operational events that impact significantly on the harmonics generated on the system. More sophisticated analysis methods are required to automatically determine which part of …
Human Visual Perception Of Region Warping Distortions, Yang-Wai Chow, Ronald Pose, Matthew Regan, James Phillips
Human Visual Perception Of Region Warping Distortions, Yang-Wai Chow, Ronald Pose, Matthew Regan, James Phillips
Faculty of Informatics - Papers (Archive)
Interactive virtual reality requires at least 60 frames per second in order to ensure smooth motion. For a good immersive experience, it is also necessary to have low end-to-end latency so that user interaction does not suffer from perceptible delays in images presented to the eyes. The Address Recalculation Pipeline (ARP) architecture reduces end-to-end latency in immersive Head Mounted Display (HMD) virtual reality systems. By using the ARP in conjunction with priority rendering, different sections of the scene are updated at different rates. This reduces the overall rendering load and allows for more complex and realistic scenes. Large object segmentation …
On The Design Of Early Generation Variety Trials With Correlated Data, Brian R. Cullis, A B. Smith, N. E. Coombes
On The Design Of Early Generation Variety Trials With Correlated Data, Brian R. Cullis, A B. Smith, N. E. Coombes
Faculty of Informatics - Papers (Archive)
This article considers the design of early generation variety trials with a prespecified spatial correlation structure and introduces a new class of partially replicated designs called p-rep designs in which the plots of standard varieties are replaced by additional plots of test lines. We show how efficient p-rep designs can be readily generated using the modified Reactive TABU search algorithm. The expected and realized genetic gain of p-rep and grid plot designs is compared in a simulation study.
Recovering Dc Coefficients In Block-Based Dct, Takeyuki Uehara, Reihaneh Safavi-Naini, Philip Ogunbona
Recovering Dc Coefficients In Block-Based Dct, Takeyuki Uehara, Reihaneh Safavi-Naini, Philip Ogunbona
Faculty of Informatics - Papers (Archive)
It is a common approach for JPEG andMPEGencryption systems to provide higher protection for dc coefficients and less protection for ac coefficients. Some authors have employed a cryptographic encryption algorithm for the dc coefficients and left the ac coefficients to techniques based on random permutation lists which are known to be weak against known-plaintext and chosen-ciphertext attacks. In this paper we show that in block-based DCT, it is possible to recover dc coefficients from ac coefficients with reasonable image quality and show the insecurity of image encryption methods which rely on the encryption of dc values using a cryptoalgorithm. The …
Active Seismic Response Control Of Tall Buildings Based On Reduced Order Model, Haiping Du, John Boffa, Nong Zhang
Active Seismic Response Control Of Tall Buildings Based On Reduced Order Model, Haiping Du, John Boffa, Nong Zhang
Faculty of Informatics - Papers (Archive)
This paper applies the dynamic model reduction method to obtain a reduced order model of an experimental tall building which has twenty floors and is 2.5m high. The experimental model is designed to imitate a real tall building with an active mass damper, and is used to study the available modelling and active control strategies for real tall buildings. Based on the dynamic model reduction method, a reduced order model is used within a Hinfin controller design to suppress excessive vibrations induced by seismic excitation. The reduced order model effectively describes only those frequency characteristics from the full order …
Modelling Of A Magneto-Rheological Damper By Evolving Radial Basis Function Networks, Haiping Du, James Lam, Nong Zhang
Modelling Of A Magneto-Rheological Damper By Evolving Radial Basis Function Networks, Haiping Du, James Lam, Nong Zhang
Faculty of Informatics - Papers (Archive)
This paper presents an approach to approximate the forward and inverse dynamic behaviours of a magneto-rheological (MR) damper using evolving radial basis function (RBF) networks. Due to the highly nonlinear characteristics of MR dampers, modelling of MR dampers becomes a very important problem to their applications. In this paper, an alternative representation of the MR damper in terms of evolving RBF networks, which have a structure of four input neurons and one output neuron to emulate the forward and inverse dynamic behaviours of an MR damper, respectively, is developed by combining the genetic algorithms (GAs) to search for the network …
Wool And Meat Genetics - The Joint Possibilities, N. M. Fogarty, E. Safari, Arthur R. Gilmour, V. M. Ingham, K. D. Atkins, S. I. Mortimer, A. A. Swan, F. D. Brien, J. C. Greeff, J. H. J. Van Der Werf
Wool And Meat Genetics - The Joint Possibilities, N. M. Fogarty, E. Safari, Arthur R. Gilmour, V. M. Ingham, K. D. Atkins, S. I. Mortimer, A. A. Swan, F. D. Brien, J. C. Greeff, J. H. J. Van Der Werf
Faculty of Informatics - Papers (Archive)
Wool and meat contribute to profit in sheep enterprises and both need to be considered in breeding programs. The relative responses expected from selection for a range of traits are presented and the realised responses that have been achieved in Merinos and variation in maternal breeds are illustrated. Knowledge of genetic parameters is required for the development of complex breeding objectives and selection indexes, comprehensive genetic evaluation of animals and the design of effective breeding programs. A review of world literature has highlighted the lack of accurate estimates of genetic parameters, especially for genetic correlations between trait groups. Analyses of …
Genetic Analysis Of Weight, Fat And Muscle Depth In Growing Lambs Using Random Regression Models, T. Fischer, J. Van Der Werf, R. Banks, A. Ball, Arthur R. Gilmour
Genetic Analysis Of Weight, Fat And Muscle Depth In Growing Lambs Using Random Regression Models, T. Fischer, J. Van Der Werf, R. Banks, A. Ball, Arthur R. Gilmour
Faculty of Informatics - Papers (Archive)
Genetic parameters were estimated using uni- and bi-variate random regression models for weight, eye-muscle depth and fat depth measures between 60 and 360 days of age. Each trait was measured up to five times in 50-day intervals following weaning on approximately 4000 Australian Poll Dorset Sheep. The model accounted for rearing type, dam age, management group and age of recording. The model used for analysing weight included quadratic, orthogonal polynomials for direct genetic and environmental effects, a linear polynomial for maternal genetic effects and heterogeneous error variance across ages. The fat and muscle analysis used linear orthogonal polynomials for direct …
The Advancement Of Positioning Technologies In Defense Intelligence, Katina Michael, Amelia Masters
The Advancement Of Positioning Technologies In Defense Intelligence, Katina Michael, Amelia Masters
Faculty of Informatics - Papers (Archive)
The adoption of positioning technologies to supplement, complement and function as defense intelligence applications has become widely accepted within homeland security and military circles. At the core of advancement are four main positioning technologies. Specifically these are the global positioning system (GPS), second generation (2G) and beyond mobile telephone networks (including wireless data networks), radio-frequency identification (RFID) and geographic information systems (GIS). For all positioning technologies, both separately and when combined, it is of primary importance to their continued adoption that the controlling powers have an in-depth understanding of the causality between implementation, usage and flow-on effect. This relies on …
A Molecular Line Survey Of W3(Oh) And W3 Irs 5 From 84.7 To 115.6 Ghz: Observational Data And Analyses, S. J. Kim, H. D. Kim, Y. Lee, Y. C. Minh, R. Balasubramanyam, M. G. Burton, T. J. Millar, D. W. Lee
A Molecular Line Survey Of W3(Oh) And W3 Irs 5 From 84.7 To 115.6 Ghz: Observational Data And Analyses, S. J. Kim, H. D. Kim, Y. Lee, Y. C. Minh, R. Balasubramanyam, M. G. Burton, T. J. Millar, D. W. Lee
Faculty of Informatics - Papers (Archive)
We have carried out observations toward the W3 complex and G34.3+0.15 using the TRAO 14 m radio telescope to examine in detail the chemical variations occurring while molecular clouds evolve from the prestellar to the H II region phase. Observations include spectral surveys of these objects between 84.7 and 115.6 GHz; mapping observations toward W3(OH) with the emissions of CS (2–1), HCN (1–0), HNC (1–0), and HCO+ (1–0); and mapping of CS (2–1) emission toward W3 IRS 5. Chemical model calculations are used to estimate the age of W3(OH) by comparing with the fractional abundances of detected molecules. We found …
Spin-Wave Relaxation In Diluted Magnetic Semiconductors Within The Self-Consistent Green's Function Approach, J E. Bunder, Shih-Jye Sun, Hsiu-Hau Lin
Spin-Wave Relaxation In Diluted Magnetic Semiconductors Within The Self-Consistent Green's Function Approach, J E. Bunder, Shih-Jye Sun, Hsiu-Hau Lin
Faculty of Informatics - Papers (Archive)
No abstract provided.
Stc-Mimo Block Spread Ofdm In Frequency Selective Rayleigh Fading Channels, Le Chung Tran, Xiaojing Huang, Eryk Dutkiewicz, Joe F. Chicharo
Stc-Mimo Block Spread Ofdm In Frequency Selective Rayleigh Fading Channels, Le Chung Tran, Xiaojing Huang, Eryk Dutkiewicz, Joe F. Chicharo
Faculty of Informatics - Papers (Archive)
In this paper, we expand the idea of spreading the transmitted symbols in OFDM systems by unitary spreading matrices based on the rotated Hadamard or rotated Discrete Fourier Transform (DFT) matrices proposed in the literature to apply to Space-Time Coded Multiple-Input Multiple-Output OFDM (STC-MIMO-OFDM) systems. We refer the resulting systems to as STC-MIMO Block Spread OFDM (STC-MIMO-BOFDM) systems. In the proposed systems, a multi-dimensional diversity, including time, frequency, space and modulation diversities, can be used, resulting in better bit error performance in frequency selective Rayleigh fading channels compared to the conventional OFDM systems with or without STCs. Simulations carried out …
Modelling The Induced Force Of Attraction In Electrorheological Nanofluids, Barry J. Cox, Ngamta Thamwattana, James M. Hill
Modelling The Induced Force Of Attraction In Electrorheological Nanofluids, Barry J. Cox, Ngamta Thamwattana, James M. Hill
Faculty of Informatics - Papers (Archive)
The problem of electric-field induced force between spheres is fundamental to electrorheological fluids. In this paper we summarize recent work, and in particular present an exact solution to the electrostatic problem of dielectric spheres subject to an externally applied electric field. The numerical results are compared to published experimental data and the solution is shown to accurately predict the low-frequency experimental results at all measured interstices and particularly is applicable to nanosized spheres in close proximity. This method is applicable to nonidentical spheres and results indicate a genuine maximum in the attractive force between spheres exists, which depends on relative …
Freight Transport Cost Recovery In Australia, Philip Laird
Freight Transport Cost Recovery In Australia, Philip Laird
Faculty of Informatics - Papers (Archive)
Introduction: Recent rail and road freight tasks in Australia are indicated in Table 1. The income from rail freight services in 2002-03 was noted by the Australasian Railway Association (ARA - 2004) as $3 billion (hire and reward earnings plus the market value of ancillary freight operations). The hire and reward road freight industry income for 1999-2000 was about $18.2 billion (Australian Trucking Association, 2004).
Testing For Activation In Data From Fmri Experiments, Martina Pavlicova, Noel A. Cressie, Thomas J. Santner
Testing For Activation In Data From Fmri Experiments, Martina Pavlicova, Noel A. Cressie, Thomas J. Santner
Faculty of Informatics - Papers (Archive)
The traditional method for processing functional magnetic resonance imaging (FMRI) data is based on a voxel-wise, general linear model. For experiments conducted using a block design, where periods of activation are interspersed with periods of rest, a haemodynamic response function (HRF) is convolved with the design function and, for each voxel, the convolution is regressed on prewhitened data. An initial analysis of the data often involves computing voxel-wise two-sample t-tests, which avoids a direct specification of the HRF. Assuming only the length of the haemodynamic delay is known, scans acquired in transition periods between activation and rest are omitted, and …
A Coordinated Architecture For The Agent-Based Service Level Agreement Negotiation Of Web Service Composition, Mohan Baruwal Chhetri, Jian Lin, Sukkeong Goh, Jun Yan, Jian Ying Zhang, Ryszard Kowalczyk
A Coordinated Architecture For The Agent-Based Service Level Agreement Negotiation Of Web Service Composition, Mohan Baruwal Chhetri, Jian Lin, Sukkeong Goh, Jun Yan, Jian Ying Zhang, Ryszard Kowalczyk
Faculty of Informatics - Papers (Archive)
Recent progress in the field of Web services has made it possible to integrate inter-organizational and heterogeneous services on the Web at runtime. If a user request cannot be satisfied by a single Web service, it is (or should be) possible to combine existing services in order to fulfill the request. However, there are several challenging issues that need to be addressed before this can be realized in the true sense. One of them is the ability to ensure end-to-end QoS of a Web service composition. There is a need for a SLA negotiation system which can ensure the autonomous …