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Articles 1 - 30 of 349
Full-Text Articles in Physical Sciences and Mathematics
Real-World Performance Of Current Proactive Multi-Hop Mesh Protocols, M. Abolhasan, Brett Hagelstein, Jerry Chun-Ping Wang
Real-World Performance Of Current Proactive Multi-Hop Mesh Protocols, M. Abolhasan, Brett Hagelstein, Jerry Chun-Ping Wang
Faculty of Informatics - Papers (Archive)
The proliferation of mesh or ad hoc network protocols has lead to a push for protocol standardisation. While there are a number of both open-source and proprietary mesh routing protocols being developed, there is only a small amount of literature available that shows relative strengths and weaknesses of different protocols. This paper investigates the performance of a number of available routing protocols using a real-world testbed. Three routing protocols - Optimised Link State Routing (OLSR), Better Approach To Mobile Ad hoc Network (B.A.T.M.A.N.) and BABEL - were chosen for this study. Our investigations focus on the multi-hopping performance and the …
Controlling Technology, K. Michael, M. Michael
Controlling Technology, K. Michael, M. Michael
Associate Professor Katina Michael
No abstract provided.
The Prüm Treaty And The Implications Of The European Court Of Human Rights’ Ruling Against The Uk’S Policy Of Keeping Fingerprints And Dna Samples Of Criminal Suspects, K. Michael
Associate Professor Katina Michael
See CTCP release at http://ctcp.uow.edu.au/news/UOW065026.html
Complex Adaptive Systems As A Model For Evaluating Organisational Change Caused By The Introduction Of Health Information Systems, Kieren Diment Mr, Ping Yu, K. Garrety
Complex Adaptive Systems As A Model For Evaluating Organisational Change Caused By The Introduction Of Health Information Systems, Kieren Diment Mr, Ping Yu, K. Garrety
Faculty of Informatics - Papers (Archive)
This paper documents the preliminary development of a framework for evaluating organisational change processes during the implementation of an electronic nursing documentation system in residential aged care facilities. It starts with a brief outline of organisational change processes. This is followed by a more detailed exposition of the principles underlying complex adaptive systems (CAS) theory, where we explain how mathematical concepts can be used to illuminate qualitative research approaches. Finally we present some preliminary findings on the facilitators and barriers for the introduction of the electronic documentation system, explained with reference to the CAS theory, based on analysis of interviews …
Peeling Adhesive Tape Emits Electromagnetic Radiation At Terahertz Frequencies, J. Horvat, R. A. Lewis
Peeling Adhesive Tape Emits Electromagnetic Radiation At Terahertz Frequencies, J. Horvat, R. A. Lewis
Faculty of Engineering - Papers (Archive)
An unusual concept for a simple and inexpensive terahertz source is presented: unpeeling adhesive tape. The observed spectrum of this terahertz radiation exhibits a peak at 2 THz and a broader peak at 18 THz. The radiation is not polarized. The mechanism of terahertz radiation is tribocharging of the adhesive tape and subsequent discharge, possibly bremsstrahlung with absorption or energy density focusing during the dielectric breakdown of a gas. The accompanying optical emission is also a consequence of tribocharging.
Location-Based Services For Emergency Management: A Multi-Stakeholder Perspective, Anas Aloudat, K. Michael, Roba Abbas
Location-Based Services For Emergency Management: A Multi-Stakeholder Perspective, Anas Aloudat, K. Michael, Roba Abbas
Associate Professor Katina Michael
This paper investigates the deployment of locationbased services for nationwide emergency management by focusing on the perspectives of two stakeholders, government and end-users, in the cellular mobile phone value chain. The data collected for the study came from a single in-depth interview and open comments in a preliminary end-user survey. The themes presented have been categorised using a qualitative analysis. The findings indicate that although governments and end-users believe that location-based services have the potential to aid people in emergencies, there are several major disagreements over the proposed deployment. This paper is an attempt to help determine the underlying motivations …
The Current State Of Commercial Location-Based Service Offerings In Australia, Roba Abbas, K. Michael, M.G. Michael, Anas Aloudat
The Current State Of Commercial Location-Based Service Offerings In Australia, Roba Abbas, K. Michael, M.G. Michael, Anas Aloudat
Associate Professor Katina Michael
Location-based services (LBS) provide geographic data for a variety of purposes, and through numerous devices such as mobile phones, GPS navigation systems, palm pilots and increasingly desktop computers. Presently, there is scant information relating to the current state of the LBS market, specifically location-based service applications in Australia. This study makes use of usability context analyses to examine Australia’s three leading telecommunications operators- Telstra, Optus and Vodafone- with a view to providing an overview of the types of services and solutions presently offered and targeted at the consumer, business and emergency segments. There are two units of analysis (i) the …
Two Cys Or Not Two Cys? That Is The Question; Alternative Oxidase In The Thermogenic Plant Sacred Lotus, Nicole M. Grant, Yoshihiko Onda, Yusuke Kakizaki, Kkikukatsu Ito, Jennifer R. Watling, Sharon A. Robinson
Two Cys Or Not Two Cys? That Is The Question; Alternative Oxidase In The Thermogenic Plant Sacred Lotus, Nicole M. Grant, Yoshihiko Onda, Yusuke Kakizaki, Kkikukatsu Ito, Jennifer R. Watling, Sharon A. Robinson
Faculty of Science - Papers (Archive)
Sacred lotus (Nelumbo nucifera) regulates temperature in its floral chamber to 32°C to 35°C across ambient temperatures of 8°C to 40°C with heating achieved through high alternative pathway fluxes. In most alternative oxidase (AOX) isoforms, two cysteine residues, Cys1 and Cys2, are highly conserved and play a role in posttranslational regulation of AOX. Further control occurs via interaction of reduced Cys1 with α-keto acids, such as pyruvate. Here, we report on the in vitro regulation of AOX isolated from thermogenic receptacle tissues of sacred lotus. AOX protein was mostly present in the reduced form, …
Source Regions For Co2 At Cape Point Assessed By Modelling, 222rn And Meteorological Data, S. Whittlestone, E. Kowalczyk, E.-G Brunke, C. Labuschagne
Source Regions For Co2 At Cape Point Assessed By Modelling, 222rn And Meteorological Data, S. Whittlestone, E. Kowalczyk, E.-G Brunke, C. Labuschagne
Faculty of Science - Papers (Archive)
This study explores methods of characterising experimental and modelling data to see if trace gas measurements at the Cape Point GAW station could improve our understanding of sources from the continent. Selection criteria have been defined which make it possible to divide the samples into categories with predominant transport to Cape Point from one of four source regions: City (greater Cape Town); close rural (within about 150 km of Cape Point); distant rural (from 150 to about 500 km) and very distant rural covering the rest of southern Africa. For species with fairly uniform source such as radon or CO, …
Location And Interactive Services Not Only At Your Fingertips But Under Your Skin, Rodney Ip, K. Michael, M.G. Michael
Location And Interactive Services Not Only At Your Fingertips But Under Your Skin, Rodney Ip, K. Michael, M.G. Michael
Associate Professor Katina Michael
This paper explores the work of Professor Kevin Warwick, a researcher in the Department of Cybernetics at the University of Reading in the United Kingdom, who has played a major role in propelling the science of humancentric chip implantation. On the 24th of August 1998, just over a decade ago, Professor Warwick became the first man to officially implant a radio-frequency identification (RFID) transponder under his skin. This paper explores Warwick’s achievements, motivations, and chipping experience, offering a unique insight into the ethical dilemmas and controversy surrounding implantable devices for identification purposes, interactive environments and the potential for location-based services. …
Predicting The Socioethical Implications Of Implanting People With Microchips, K. Michael, M.G. Michael
Predicting The Socioethical Implications Of Implanting People With Microchips, K. Michael, M.G. Michael
Associate Professor Katina Michael
Privacy, security, trust, control and human rights are all concerns that need to be addressed before widespread diffusion of advanced identification technologies.
Keeping Track Of Things, John Purvis, K. Michael
Keeping Track Of Things, John Purvis, K. Michael
Associate Professor Katina Michael
No abstract provided.
Accumulation Of Dna Damage In Antarctic Mosses: Correlations With Ultraviolet-B Radiation, Temperature And Turf Water Content Vary Amongst Species, J. D. Turnbull, Sharon A. Robinson
Accumulation Of Dna Damage In Antarctic Mosses: Correlations With Ultraviolet-B Radiation, Temperature And Turf Water Content Vary Amongst Species, J. D. Turnbull, Sharon A. Robinson
Faculty of Science - Papers (Archive)
The susceptibility of three East Antarctic moss species to UV-B radiation was examined by measuring accumulation of cyclobutane pyrimidine dimers under natural sunlight during the austral summer season of 2002/03. The 2002/03 season was characterised by unusually low springtime ozone depletion and as such our results likely underestimate the DNA damage possible in a more typical UV-B radiation season. Despite this all three species accumulated significant DNA photoproducts. We also found a positive association between photoproduct accumulation and incident UV-B radiation in the two cosmopolitan species, Bryum pseudotriquetrum and Ceratodon purpureus, with more DNA damage in samples collected early …
Genetic Structure Of East Antarctic Populations Of The Moss Ceratodon Purpureus, L. J. Clarke, D. J. Ayre, Sharon A. Robinson
Genetic Structure Of East Antarctic Populations Of The Moss Ceratodon Purpureus, L. J. Clarke, D. J. Ayre, Sharon A. Robinson
Faculty of Science - Papers (Archive)
The capacity of the polar flora to adapt is of increasing concern given current and predicted environmental change in these regions. Previous genetic studies of Antarctic mosses have been of limited value due to a lack of variation in the markers or non-specificity of the methods used. We examined the power of five microsatellite loci developed for the cosmopolitan moss Ceratodon purpureus to detect genetically distinct clones and infer the distribution of clones within and among populations from the Windmill Islands, East Antarctica. Our microsatellite data suggest extraordinarily high levels of variation reported in RAPD studies were artificially elevated by …
Just Add Water: Colonisation, Water Governance, And The Australian Inland, Leah Maree Gibbs
Just Add Water: Colonisation, Water Governance, And The Australian Inland, Leah Maree Gibbs
Faculty of Science - Papers (Archive)
Water has played a key role in the development of the Australian inland and the nation. For European colonists, the dry and variable landscape challenged ideas about nature imported from northern temperate regions. I argue first, that colonists brought with them ideas for ordering nature and tools for transforming landscapes that led to inappropriate and destructive water management and the silencing of local voices and knowledge systems. Secondly, colonial patterns of ordering and transforming landscapes are ongoing, but new ways of governing water, which challenge colonialism, are emerging. In the first section of the paper I discuss colonial relationships with …
Rejoinder, Peter Craigmile, Catherine Caldert, Hongfei Li, Rajib Paul, Noel Cressie
Rejoinder, Peter Craigmile, Catherine Caldert, Hongfei Li, Rajib Paul, Noel Cressie
Faculty of Informatics - Papers (Archive)
We agree with Schmidt that it is essential that researchers from many diverse areas have access to affordable, but still trustworthy, software. In this research project, substantial effort went into preparing datasets. Much of the data came from different government agencies, with databases arranged in multiple formats, often including variables that were not immediately relevant to our scientific pursuits. In our work on this project, the use of SAS was essential to producing clean datasets.
Accounting For Uncertainty In Ecological Analysis: The Strengths And Limitations Of Hierarchical Statistical Modeling, Noel Cressie, Catherine Calder, James Clark, Jay Ver Hoef, Christopher Wikle
Accounting For Uncertainty In Ecological Analysis: The Strengths And Limitations Of Hierarchical Statistical Modeling, Noel Cressie, Catherine Calder, James Clark, Jay Ver Hoef, Christopher Wikle
Faculty of Informatics - Papers (Archive)
Analyses of ecological data should account for the uncertainty in the process(es) that generated the data. However, accounting for these uncertainties is a difficult task, since ecology is known for its complexity. Measurement and/or process errors are often the only sources of uncertainty modeled when addressing complex ecological problems, yet analyses should also account for uncertainty in sampling design, in model specification, in parameters governing the specified model, and in initial and boundary conditions. Only then can we be confident in the scientific inferences and forecasts made from an analysis. Probability and statistics provide a framework that accounts for multiple …
Measuring End-Users' Opinions For Establishing A User-Centred Electronic Health Record (Ehr) System From The Perspective Of Nurses, Yung-Yu Su, Khin Than Win, John Fulcher, Herng-Chia Chiu
Measuring End-Users' Opinions For Establishing A User-Centred Electronic Health Record (Ehr) System From The Perspective Of Nurses, Yung-Yu Su, Khin Than Win, John Fulcher, Herng-Chia Chiu
Faculty of Informatics - Papers (Archive)
Establishing an acceptable user-centred electronic health record (EHR) system is a challenging task for healthcare providers due to the need for such systems to meet the requirements of its user population. Concerned nurses are the main end-users of EHR systems. Based on knowledge of evidence-based management (EBM) and the issues (goals and methods) of Health Information Systems (HIS) evaluation, this research was performed in four regional teaching hospitals by adopting a quantitative approach research design to perform “goal-based evaluation” research. The results of Path Analysis indicated that 17 of 21 hypotheses were accepted in this study. In addition, the results …
Application Of Microsimulation To The Modelling Of Terrorist Attacks, Ian Piper, Daniel Keep, Tony Green, Ivy Zhang
Application Of Microsimulation To The Modelling Of Terrorist Attacks, Ian Piper, Daniel Keep, Tony Green, Ivy Zhang
Faculty of Informatics - Papers (Archive)
In this paper, a novel approach to behavioural modelling is presented with reference to biological infection spread in communities. Its potential application to various terrorist-related scenarios is discussed in relation to attack point simulation and interdiction simulation.
Explicit Connections Between Longitudinal Data Analysis And Kernel Machines, N D. Pearce, M. P. Wand
Explicit Connections Between Longitudinal Data Analysis And Kernel Machines, N D. Pearce, M. P. Wand
Faculty of Informatics - Papers (Archive)
Two areas of research - longitudinal data analysis and kernel machines - have large, but mostly distinct, literatures. This article shows explicitly that both fields have much in common with each other. In particular, many popular longitudinal data fitting procedures are special types of kernel machines. These connections have the potential to provide fruitful cross-fertilization between longitudinal data analytic and kernel machine methodology.
Semiparametric Regression During 2003-2007, David Ruppert, M. P. Wand, Raymond J. Carroll
Semiparametric Regression During 2003-2007, David Ruppert, M. P. Wand, Raymond J. Carroll
Faculty of Informatics - Papers (Archive)
Semiparametric regression is a fusion between parametric regression and nonparametric regression that integrates low-rank penalized splines, mixed model and hierarchical Bayesian methodology - thus allowing more streamlined handling of longitudinal and spatial correlation. We review progress in the field over the five-year period between 2003 and 2007. We find semiparametric regression to be a vibrant field with substantial involvement and activity, continual enhancement and widespread application.
Diffusive Growth Of Fullerenes And Carbon Nanotubes, J E. Bunder, James M. Hill
Diffusive Growth Of Fullerenes And Carbon Nanotubes, J E. Bunder, James M. Hill
Faculty of Informatics - Papers (Archive)
The video of a growing fullerene within a carbon nanotube, initiated by a tungsten catalyst, provides a dramatic realization of a complex nanoscale process. While there may be many detailed models which can account for this growth, we propose one of the simplest possible models which is consistent with the major observed features of the growth process. In particular, we assume that the fullerene is immersed in a carbon vapor environment, and that the growth occurs as a consequence of the diffusion of the carbon vapor into the fullerene. Moreover, we assume that the classical diffusion equation applies in the …
Optimal Exercise Price Of American Options Near Expiry, W.-T. Chen, Song-Ping Zhu
Optimal Exercise Price Of American Options Near Expiry, W.-T. Chen, Song-Ping Zhu
Faculty of Informatics - Papers (Archive)
This paper investigates American puts on a dividend-paying underlying whose volatility is a function of both time and underlying asset price. The asymptotic behaviour of the critical price near expiry is deduced by means of singular perturbation methods. It turns out that if the underlying dividend is greater than the risk-free interest rate, the behaviour of the critical price is parabolic, otherwise an extra logarithmic factor appears, which is similar to the constant volatility case. The results of this paper complement numerical approaches used to calculate the option values and the optimal exercise price at times that are not close …
Relative Survival After Hospitalisation For Hip Fracture In Older People In New South Wales, Australia, Diane Hindmarsh, Andrew Hayen, Caroline Finch, Jacqueline Ct Close
Relative Survival After Hospitalisation For Hip Fracture In Older People In New South Wales, Australia, Diane Hindmarsh, Andrew Hayen, Caroline Finch, Jacqueline Ct Close
Faculty of Informatics - Papers (Archive)
Survival after hospitalisation for hip fracture by age group and sex relative to survival in the general population was assessed in people aged 65+. Men had double the risk of death compared with women to 1 year, but age effects lasted only to 3 months. Clinical outcomes need to be improved.We assessed the relative survival of hospitalised fall-related hip fracture patients aged 65+ years leaving hospital in New South Wales, Australia, between July 2000 and December 2003.We carried out a population-based study of all hospital separations for NSW residents with a principal diagnosis of hip fracture (ICD-10-AM S72.0 to S72.2) …
Polyhedral Model For Boron Nitride Nanotubes, Barry Cox, James M. Hill
Polyhedral Model For Boron Nitride Nanotubes, Barry Cox, James M. Hill
Faculty of Informatics - Papers (Archive)
The conventional rolled‐up model for nanotubes does not apply to very small radii tubes, for which curvature effects become significant. An existing geometric model for carbon nanotubes proposed by the authors, which accommodates this deficiency and which is based on the exact polyhedral cylindrical structure, is extended to a nanotube structure involving two species of atoms in equal proportion, and in particular boron nitride nanotubes. This generalisation allows the principle features to be included as the fundamental assumptions of the model, such as equal bond length but distinct bond angles and radii between the two species. The polyhedral model is …
Sampling For Subpopulations In Household Surveys With Application To Maori And Pacific Sampling, Robert Graham Clark, Michael Doherty, Angela Forbes, Robert Templeton
Sampling For Subpopulations In Household Surveys With Application To Maori And Pacific Sampling, Robert Graham Clark, Michael Doherty, Angela Forbes, Robert Templeton
Faculty of Informatics - Papers (Archive)
Many NZ national household surveys have a requirement to produce statistics with adequate precision both for the whole of NZ and for important subpopulations, particularly the Maori and Pacific populations. General population surveys which make no special provision for these groups would generally not achieve sufficient precision for Maori and Pacific estimates when these are of particular interest. Kalton and Anderson (1986) described a range of strategies for sampling subpopulations, where the aim is only to produce statistics about the subpopulation and not national statistics. The purpose of this Official Statistics Research fund project is to extend the methods of …
A Conceptlink Graph For Text Structure Mining, Rowena Chau, Ah Chung Tsoi, Markus Hagenbuchner, Vincent Lee
A Conceptlink Graph For Text Structure Mining, Rowena Chau, Ah Chung Tsoi, Markus Hagenbuchner, Vincent Lee
Faculty of Informatics - Papers (Archive)
Most text mining methods are based on representing documents using a vector space model, commonly known as a bag of word model, where each document is modeled as a linear vector representing the occurrence of independent words in the text corpus. It is well known that using this vector-based representation, important information, such as semantic relationship among concepts, is lost. This paper proposes a novel text representation model called ConceptLink graph. The ConceptLink graph does not only represent the content of the document, but also captures some of its underlying semantic structure in terms of the relationships among concepts. The …
The Graph Neural Network Model, Franco Scarselli, Marco Gori, Ah Chung Tsoi, Markus Hagenbuchner, Gabriele Monfardini
The Graph Neural Network Model, Franco Scarselli, Marco Gori, Ah Chung Tsoi, Markus Hagenbuchner, Gabriele Monfardini
Faculty of Informatics - Papers (Archive)
Many underlying relationships among data in several areas of science and engineering, e.g., computer vision, molecular chemistry, molecular biology, pattern recognition, and 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 graph domains. This GNN model, which can directly process most of the practically useful types of graphs, e.g., acyclic, cyclic, directed, and undirected, implements a function tau(G,n) isin IRm that maps a graph G and one of its nodes n …
A Hospital Based Dynamic Platform Workflow Management, Nantika Prinyapol, Joshua P. Fan, S. Lau
A Hospital Based Dynamic Platform Workflow Management, Nantika Prinyapol, Joshua P. Fan, S. Lau
Faculty of Informatics - Papers (Archive)
In this paper, we propose the use of dynamic compilation of web services to support workflow management in a hospital setting. Web services related to work practices belong to an organization that have been designed, built and stored in a web services repository. These web services can be shared with multiple functional units within the organization via the intranet or the Internet. The workflow of a health scenario will be presented. Work practice services that were selected will be compiled logically and optimally using the proposed dynamic compilation platform. The final outcome is presented as a web application. The web …
Construction Of Amicable Orthogonal Designs Of Quaternions, Ying Zhao, Jennifer Seberry, Tianbing Xia, Beata J. Wysocki, Tadeusz A. Wysocki
Construction Of Amicable Orthogonal Designs Of Quaternions, Ying Zhao, Jennifer Seberry, Tianbing Xia, Beata J. Wysocki, Tadeusz A. Wysocki
Faculty of Informatics - Papers (Archive)
This paper introduces some construction methods for amicable orthogonal designs over the real and quaternion domains which have been explored for code design before. The proposed construction methods generate a large number of amicable orthogonal designs of quaternions can be used to construct restricted quaternion orthogonal designs which can be applied to orthogonal space-time polarization block codes for wireless communications.