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2010

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A New Perspective On First Read Rate Of 2d Barcodes In Mobile Applications, Keng Tiong (Alf) Tan, Douglas Chai Jan 2010

A New Perspective On First Read Rate Of 2d Barcodes In Mobile Applications, Keng Tiong (Alf) Tan, Douglas Chai

Research outputs pre 2011

The first read rate (FRR) has been one of the traditional benchmark metric for measuring the performance of barcode systems. In recent studies, it has been noted that the FRR alone is not a complete measure of user experience, especially of barcodes in mobile applications. In this paper, we present a further three factors that would influence the user experience of mobile 2D barcodes. Our investigation is based on a quantitative survey of a controlled study participated by 250 lay users of mobile phones, through reading QRCode and Data Matrix barcodes with a variety of camera mobile phones. Observations from …

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Overseas Students In Australia: An Experiential View, Maria Ryan, Madeleine Ogilvie Jan 2010

Overseas Students In Australia: An Experiential View, Maria Ryan, Madeleine Ogilvie

Research outputs pre 2011

Overseas students have access to a number of learning opportunities available by virtue of a highly competitive tertiary education market system. Despite the increasing trend for remote, online-based learning programs, many students elect to travel outside their home country to experience the cultural difference of studying abroad. The benefit is symbiotic, with crucial university funding being attracted by increased numbers of overseas students seeking an enriched studying experience. The focus of this paper is the on-campus learning experience received by expatriate students studying in Australia and Singapore. How these students adapt to the different physical, social and emotional environments is …

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Sources Of Variability In Iso-Inertial Jump Assessments, Kristie-Lee Taylor, John Cronin, Nicholas Gill, Dale Chapman, Jeremy Sheppard Jan 2010

Sources Of Variability In Iso-Inertial Jump Assessments, Kristie-Lee Taylor, John Cronin, Nicholas Gill, Dale Chapman, Jeremy Sheppard

Research outputs pre 2011

Purpose: This investigation aimed to quantify the typical variation for kinetic and kinematic variables measured during loaded jump squats. Methods: Thirteen professional athletes performed six maximal effort countermovement jumps on fouroccasions. Testing occurred over 2 d, twice per day (8 AM and 2 PM) separated by 7 d, with the same procedures replicated on each occasion. Jump height, peak power (PP), relative peak power (RPP), mean power (MP), peak velocity (PV), peak force (PF), mean force (MF), and peak rate of force development (RFD) measurements were obtained from a linear optical encoder attached to a 40 kg barbell. Results: A …

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Bandwidth Allocation And Routing Information For Wireless Mobile Ad-Hoc Networks, Rajeshkumar Ramraj Jan 2010

Bandwidth Allocation And Routing Information For Wireless Mobile Ad-Hoc Networks, Rajeshkumar Ramraj

Research outputs pre 2011

An admission control Algorithm must organize among flows and should afford assurance of how the medium is shared between nodes. In a wired network, nodes can keep an eye on the medium to see how much bandwidth is being used by the network. On the other hand, in an Ad-Hoc network, during communication nodes possibly will use the bandwidth of neighbouring nodes. Consequently, the bandwidth consumption of flows and the accessible resources to a node are not local concepts, other than it being linked to the neighbouring nodes in carrier-sensing range. Current solutions do not address how to perform admission …

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Living Well With Diabetes: A Randomized Controlled Trial Of A Telephone-Delivered Intervention For Maintenance Of Weight Loss, Physical Activity And Glycaemic Control In Adults With Type 2 Diabetes, Elizabteh Eakin, Marina Reeves, Alison Marshall, David Dunstan, Nicholas Graves, Genevieve Healy, Jonathan Bleier, Adrian Barnett, Trisha O'Moore-Sullivan, Anthony Russell, Ken Wilkie Jan 2010

Living Well With Diabetes: A Randomized Controlled Trial Of A Telephone-Delivered Intervention For Maintenance Of Weight Loss, Physical Activity And Glycaemic Control In Adults With Type 2 Diabetes, Elizabteh Eakin, Marina Reeves, Alison Marshall, David Dunstan, Nicholas Graves, Genevieve Healy, Jonathan Bleier, Adrian Barnett, Trisha O'Moore-Sullivan, Anthony Russell, Ken Wilkie

Research outputs pre 2011

Background By 2025, it is estimated that approximately 1.8 million Australian adults (approximately 8.4% of the adult population) will have diabetes, with the majority having type 2 diabetes. Weight management via improved physical activity and diet is the cornerstone of type 2 diabetes management. However, the majority of weight loss trials in diabetes have evaluated short-term, intensive clinic-based interventions that, while producing short-term outcomes, have failed to address issues of maintenance and broad population reach. Telephone-delivered interventions have the potential to address these gaps. Methods/Design Using a two-arm randomised controlled design, this study will evaluate an 18-month, telephone-delivered, behavioural weight …

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Official/ Unofficial: Information Management And Social Association, Kay Hearn Jan 2010

Official/ Unofficial: Information Management And Social Association, Kay Hearn

Research outputs pre 2011

This paper explores the debates around civil society and corporatism as ways of understanding changes in social association, including non-governmental organisations and protest groups, and information management in relation to the development of the Internet. Both concepts have been used to examine the changes that have taken place since the implementation of the Open Door Policy and more recently the development of the Internet, and have shed light on the way in which new forms of social association operate, and on their relationship to the government. However, both concepts tend to be deterministic and eductionist positions. Instead, I use a …

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Redtnet: A Network Model For Strategy Games, Philip Hingston, Mike Preuss, Daniel Spierling Jan 2010

Redtnet: A Network Model For Strategy Games, Philip Hingston, Mike Preuss, Daniel Spierling

Research outputs pre 2011

In this work, we develop a simple, graph-based framework, RedTNet, for computational modeling of strategy games and simulations. The framework applies the concept of red teaming as a means by which to explore alternative strategies. We show how the model supports computer-based red teaming in several applications: realtime strategy games and critical infrastructure protection, using an evolutionary algorithm to automatically detect good and often surprising strategies.

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Testing An Exergame For Effectiveness And Attractiveness, Jeffrey Ronald Sinclair, Philip Hingston, Martin Masek, Kazunori Nosaka Jan 2010

Testing An Exergame For Effectiveness And Attractiveness, Jeffrey Ronald Sinclair, Philip Hingston, Martin Masek, Kazunori Nosaka

Research outputs pre 2011

In this paper, we report on an experimental study in which we investigated the use of feedback mechanisms in exergames. We based the study around the Dual Flow model for exergame design, using biophysical feedback to control exercise intensity, and player performance feedback to control gameplay challenge. We found good success in controlling exercise intensity to achieve an effective workout, while controlling gameplay challenge to improve enjoyment and attractiveness was problematic. We offer some possible reasons for this, suggesting the need for further investigation.

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The Significance Of Learning Style With Respect To Achievement In First Year Programming Students, Vivian Campbell, Michael Johnstone Jan 2010

The Significance Of Learning Style With Respect To Achievement In First Year Programming Students, Vivian Campbell, Michael Johnstone

Research outputs pre 2011

Study investigates the relationship between the Kolb learning style of first-year programming students and their level of achievement. The method of data collection is described and the process of hypothesis testing is explained. The students in this study were predominately converger and accommodator learning styles. Statistical tests indicated no overall difference between the results of students with different learning styles but a difference was found along Kolb's concrete-abstract axis. A number of possible impacts on teaching are discussed and suggestions made for future research.

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The Properties Of Nanocomposite (Bidy)3(Fega)5o12:Bi2o3 Magneto-Optic Garnet Films For Applications In Nanophotonics, Ultrafast Switching And Integrated Optoelectronics, Mikhail Vasiliev, Mohammad Nur E Alam, Viacheslav Kotov, Kamal Alameh Jan 2010

The Properties Of Nanocomposite (Bidy)3(Fega)5o12:Bi2o3 Magneto-Optic Garnet Films For Applications In Nanophotonics, Ultrafast Switching And Integrated Optoelectronics, Mikhail Vasiliev, Mohammad Nur E Alam, Viacheslav Kotov, Kamal Alameh

Research outputs pre 2011

We investigate the properties and applications of newly-developed RF-sputtered nano-composites with record-high magneto-optic quality (exceeding 25° at 532 nm and 42° at 635 nm). Bi-substituted dysprosium-gallium iron garnet layers with excess co-sputtered bismuth oxide content are demonstrated to possess very attractive optical and magnetic properties, which makes them suitable for novel magneto-optic and nanophotonic applications.

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Photovoltaic Micro-Cell Design For Distrubuted Power In Sensor Networks, Gary A. Allwood, Graham Wild, Steven Hinckley Jan 2010

Photovoltaic Micro-Cell Design For Distrubuted Power In Sensor Networks, Gary A. Allwood, Graham Wild, Steven Hinckley

Research outputs pre 2011

We present a new study of power over optical fiber, for use in optical fiber smart sensor networks, using silicon-based photovoltaic micro-cells. A number of parameters in the design of the micro-cell for implementation in a power converter chip have been investigated. Matching the beam profile to the active region, as well as maximizing the contact area improves the device efficiency. The effect of doping profile and junction type on the device performance, suggests silicon is a cost effective and suitable material for this application.

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Multi-Wavelength Laser Scanning Architecture For Object Discrimination, Kavitha Venkataraayan, Sreten Askraba, Kamal Alameh, Clifton Smith Jan 2010

Multi-Wavelength Laser Scanning Architecture For Object Discrimination, Kavitha Venkataraayan, Sreten Askraba, Kamal Alameh, Clifton Smith

Research outputs pre 2011

A novel method for identifying and discriminating various objects using five different lasers is described. This method uses a laser combination module that allows five laser diodes of different wavelengths to sequentially emit identically polarized light beams through a common aperture, along one optical path. Each laser beam enters a custom-made curved optical cavity for multi-beam spot generation through internal partial beam reflection. The intensity of the reflected light beams from each spot is detected by a high-speed area scan image sensor. Object discrimination based on analyzing the Gaussian profile of reflected laser light at distinguishing wavelengths is demonstrated.

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Opto-Vlsi-Based Tunable Linear-Cavity Fibre Laser, David Michel, Feng Xiao, Kamal Alameh Jan 2010

Opto-Vlsi-Based Tunable Linear-Cavity Fibre Laser, David Michel, Feng Xiao, Kamal Alameh

Research outputs pre 2011

A novel approach using an Opto-VLSI processor to achieve a tunable fibre laser is presented. The Opto-VLSI based fibre laser is able to tune wavelengths and maintain a high Side-Mode Suppression Ratio (SMSR) even when the output optical power is low. Experimental results show a continuously tunable fibre laser source with a tuning range as high as 30 nm and a SMSR exceeding 30 dB.

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Opto-Vlsi-Based Rf Beamformer For Space Division Multiple Access Network, Budi Juswardy, Feng Xiao, Kamal Alameh Jan 2010

Opto-Vlsi-Based Rf Beamformer For Space Division Multiple Access Network, Budi Juswardy, Feng Xiao, Kamal Alameh

Research outputs pre 2011

In this paper, the architecture of a photonic-assisted smart antenna for Space-division Multiple Access (SDMA) is described. Antenna beam steering is achieved by generating independent true-time delay (TTD) for each element in the antenna arrays, through the use of an Opto-VLSI Processor in conjunction with a 10-km single mode optical fibre. Experimental results demonstrate RF beam steering in 4-element linear patch antenna array operating at 1.85GHz are presented.

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Jpeg Compression Of Monochrome 2d-Barcode Images Using Dct Coefficient Distributions, Keng Teong Tan, Douglas Chai Jan 2010

Jpeg Compression Of Monochrome 2d-Barcode Images Using Dct Coefficient Distributions, Keng Teong Tan, Douglas Chai

Research outputs pre 2011

Two dimensional (2D) barcodes are becoming a pervasive interface for mobile devices, such as camera phones. Often, only monochrome 2D-barcodes are used due to their robustness in an uncontrolled operating environment of camera phones. Most camera phones capture and store such 2D-barcode images in the baseline JPEG format. As a lossy compression technique, JPEG does introduce a fair amount of error in the decoding of captured 2D-barcode images. In this paper, we introduce an improved JPEG compression scheme for such barcode images. By altering the JPEG compression parameters based on the DCT coefficient distribution of such barcode images, the improved …

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The Use Of Alignment Cells In Mmcc Barcode, Siong Khai Ong, Douglas Chai, Alexander Rassau Jan 2010

The Use Of Alignment Cells In Mmcc Barcode, Siong Khai Ong, Douglas Chai, Alexander Rassau

Research outputs pre 2011

The QR code, a monochrome 2D barcode, is a popular and commonly used barcode system worldwide. QR codes can easily be read using a mobile phone with the appropriate decoder. As there is an increasing need for higher data capacity barcodes, some newer 2D barcodes, such as the MMCC code, have adopted the use of colour. However, the use of colour introduces more challenges for mobile phone decoders than with monochrome codes. In this paper, the use of alignment cells within the MMCC code is proposed to improve the robustness of the colour barcode when used in a mobile environment. …

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High Utility Video Surveillance System On Public Transport Using Wimax Technology, Iftekhar Ahmad, Daryoush Habibi Jan 2010

High Utility Video Surveillance System On Public Transport Using Wimax Technology, Iftekhar Ahmad, Daryoush Habibi

Research outputs pre 2011

Video surveillance on public transport is a useful tool to fight against anti-social behaviour like vandalism, harassment, graffiti and terrorism. Real-time video surveillance on moving public transport faces serious technological challenges mainly due to limited throughput offered by existing communication technologies at high vehicular speeds. Success of real-time video surveillance on public transport heavily depends on future communication technologies like WiMAX. WiMAX has emerged as an exciting technology with promises to offer high throughput and improved quality of services (QoS), key requirements for video surveillance on public transport. WiMAX however, offers limited throughput at high vehicular speeds mainly because of …

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Call Admission Control Scheme For The Ieee 802.16e At Vehicular Speeds, Iftekhar Ahmad, Daryoush Habibi Jan 2010

Call Admission Control Scheme For The Ieee 802.16e At Vehicular Speeds, Iftekhar Ahmad, Daryoush Habibi

Research outputs pre 2011

The IEEE 802.16e standard has emerged as an exciting mobile wireless broadband technology that promises to deliver both high throughput and guaranteed quality of service (QoS). Call admission control (CAC) scheme serves as a great utility for WiMAX, which ensures that resources are not over committed and thereby, all existing connections enjoy guaranteed quality of service. Existing CAC schemes largely depend on computation of available resources while making an acceptance or rejection decision once a new request arrives. Since wireless channels are not as reliable as wired communication, CAC scheme in WiMAX communication faces a serious challenge of making a …

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Simulation Of A Hybrid Polywell And Stacked Gradient Poly-Homojunction Cmos Photodiode, Paul V. Jansz, Steven Hinckley Jan 2010

Simulation Of A Hybrid Polywell And Stacked Gradient Poly-Homojunction Cmos Photodiode, Paul V. Jansz, Steven Hinckley

Research outputs pre 2011

In this paper, we have simulated the performance of a photodiode array that has multiple wells per pixel as well as a stacked-gradient poly-homojunction (StaG) geometry. The pixel response resolution was improved when the first StaG epilayer was within 2 μm of the space charge region (SCR).

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Adiabatic Coherent Quantum Tunneling Of Ultracold Atoms Trapped In An Asymmetrical Two-Dimensional Magnetic Lattices, Ahmed Abdelrahman, Kamal Alameh, Peter Hannford Jan 2010

Adiabatic Coherent Quantum Tunneling Of Ultracold Atoms Trapped In An Asymmetrical Two-Dimensional Magnetic Lattices, Ahmed Abdelrahman, Kamal Alameh, Peter Hannford

Research outputs pre 2011

We propose a new method to realize a two-dimensional magnetic lattice, having two different configurations of asymmetric magnetic lattice, which exhibits magnetic band gap structure, and a symmetric magnetic lattice. We also describe the tunneling mechanisms of magnetically trapped ultracold atoms, prepared in a degenerate quantum gas such as Bose-Einstein Condensate (BEC). A coherent quantum tunneling of ultracold atoms between the sites of the asymmetrical magnetic lattice can be realized which induces the adiabatically controlled dc Josephson current. At critical phase transitions, namely at certain values of site phase difference and population fraction, a plasma oscillation can be observed in …

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Spatial Performance Of Acousto-Ultrasonic Fiber Bragg Grating Sensor, Graham Wild, Steven Hinckley Jan 2010

Spatial Performance Of Acousto-Ultrasonic Fiber Bragg Grating Sensor, Graham Wild, Steven Hinckley

Research outputs pre 2011

In this letter, we present results for the spatial performance of a fiber Bragg grating (FBG) sensor to continuous-wave acousto-ultrasonic (AU) signals. The FBG AU sensor is an intensity sensor, using a transmit reflect detection system. The AU sensor was used to receive actively generated continuous-wave ultrasonic signals from a PZT transducer. We present results showing the received signal strength as a function of longitudinal, lateral, and angular separation in small aluminum panels. Measurements were taken for distances of less then 100 mm and at angles from 0 to 90 degrees between the sensor and the transducer. These results show …

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Pspice Simulation Of An Electro-Acoustic Communications Channel, Graham Wild, Steven Hinckley Jan 2010

Pspice Simulation Of An Electro-Acoustic Communications Channel, Graham Wild, Steven Hinckley

Research outputs pre 2011

In this paper, we present results from a circuit simulation of a proposed electro-acoustic communications channel. The communications channel was modeled in PSpice using Redwood's version of Mason's equivalent circuit. The simulations used binary phase shift keyed communications signals with a carrier frequency of 1.12 MHz. Results obtained from the model are comparable with the results obtained experimentally. The frequency response of the model matched the measured frequency response, predicting lower frequency resonances obtained in the experimental data. The transient response of the model compares almost identically with the transient response observed experimentally. This is a significant characteristic as the …

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Adaptive Optical Splitter Employing An Opto-Vlsi Processor And A 4-F Imaging System, Haithem Ab Mustafa, Feng Xiao, Kamal Alameh Jan 2010

Adaptive Optical Splitter Employing An Opto-Vlsi Processor And A 4-F Imaging System, Haithem Ab Mustafa, Feng Xiao, Kamal Alameh

Research outputs pre 2011

A novel adaptive optical splitter structure employing an Opto-VLSI processor and 4-f imaging system is proposed and experimentally demonstrated. By driving the Opto-VLSI processor with computer generated multicasting phase holograms, an input optical signal launched into an input optical fiber port can be split and coupled into many output optical fiber ports with arbitrary splitting ratios. A proof-of-principle 1 2 adaptive optical splitter structure driven by optimized multicasting phase holograms uploaded onto the Opto-VLSI processor is developed, demonstrating an arbitrary splitting ratio over a wavelength range exceeding 50 nm.

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Wireless Acoustic Communications And Power Supply For In-Vivo Biomedical Devices, Graham Wild, Steven Hinckley Jan 2010

Wireless Acoustic Communications And Power Supply For In-Vivo Biomedical Devices, Graham Wild, Steven Hinckley

Research outputs pre 2011

Pacemakers are common biomedical devices used in the treatment of specific cardiovascular problems. Current research in biomedical engineering is investigating the use of so called brain pacemakers to regulate conditions such as Parkinson's and other neurological conditions. In this paper, we demonstrate the principle of acoustic communications and power harvesting, in vivo. The signals are intended to be used for fixed in vivo biomedical devices, such as pacemakers, were wired and wireless RF communications cannot be used. Results show the performance of the communications channel. The frequency response, transfer function and transient response (at resonance) of the communications channel were …

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Effect Of A Polywell Geometry On A Cmos Photodiode Array, Paul V. Jansz, Steven Hinckley, Graham Wild Jan 2010

Effect Of A Polywell Geometry On A Cmos Photodiode Array, Paul V. Jansz, Steven Hinckley, Graham Wild

Research outputs pre 2011

The effect of a polywell geometry hybridized with a stacked gradient poly-homojunction architecture, on the response of a CMOs compatible photodiode array was simulated. Crosstalk and sensitivity improved compared to the polywell geometry alone, for both back and front illumination

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Light Reductions Drive Macroinvertebrate Changes In Amphibolis Griffithii Seagrass Habitat, Adam Gartner, Paul S. Lavery, Kathryn Mcmahon, Anne Brearley, Helen Barwick Jan 2010

Light Reductions Drive Macroinvertebrate Changes In Amphibolis Griffithii Seagrass Habitat, Adam Gartner, Paul S. Lavery, Kathryn Mcmahon, Anne Brearley, Helen Barwick

Research outputs pre 2011

Numerous anthropogenic activities can significantly reduce the amount of light reaching seagrass habitats. Typically these result in morphological and physiological changes to the plant and associated algal epiphytes. However, the flow-on effects to seagrass-dependent fauna induced by these disturbances has yet to be examined. This study investigated the effects of different light reduction intensity (high: ~92% reduction; moderate: ~84% reduction), duration (3, 6 and 9 mo) and timing (post-winter and post-summer) on the density and biomass of macroinvertebrate epifauna within an Amphibolis griffithii seagrass ecosystem (Western Australia). There were generally lower epifauna densities and biomass within shaded seagrass plots. When …

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Proximity To Rocky Reefs Alters The Balance Between Positive And Negative Effects On Seagrass Fauna, Fernando Tuya, Mathew Vanderklift, Glenn Hyndes, Thomas Wernberg, Mads Thomsen, Christine Hanson Jan 2010

Proximity To Rocky Reefs Alters The Balance Between Positive And Negative Effects On Seagrass Fauna, Fernando Tuya, Mathew Vanderklift, Glenn Hyndes, Thomas Wernberg, Mads Thomsen, Christine Hanson

Research outputs pre 2011

Proximity to habitat margins can alter the balance between positive and negative forces on species abundance. Based on this idea we examined abundance patterns of herbivorous gastropods in seagrasses adjacent to rocky reefs. We tested whether the balance between the intensity of predation (negative effect) and recruitment of new individuals (positive effect) changes with increasing distance from reefs. Abundances of gastropods varied with distance to reefs, but the direction of changes in abundance was taxon-specific: some taxa decreased in abundance with increasing distance from reefs (e.g. Pyrene bidentata), while others showed the opposite pattern (e.g. Cantharidus lepidus). Predators were more …

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Stable Isotopes Reveal A Consistent Consumer-Diet Relationship Across Hundreds Of Kilometres, Mathew A. Vanderklift, Thomas Wernberg Jan 2010

Stable Isotopes Reveal A Consistent Consumer-Diet Relationship Across Hundreds Of Kilometres, Mathew A. Vanderklift, Thomas Wernberg

Research outputs pre 2011

Characterising geographical variation in trophic interactions is an important step towards understanding the consequences of changes in food webs. We characterised geographical variation across ~1000 km in stable isotope values (δ15N and δ13C) of the widely distributed sea urchin Heliocidaris erythrogramma and macroalgae that are its potential food. Variation in δ15N of H. erythrogramma and macroalgae was typically greatest among locations separated by hundreds of km, while variation in δ13C was typically greatest among reefs separated by a few km. Geographical variation in δ15N and δ13C of H. erythrogramma was well-explained by variation in δ15N and δ13C of the kelp …

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Cladding Modes Analysis Of Photonics Crystal Fiber For Refractive Index Sensors Using Finite Element Method, Naeem Khurram, Linh Viet Nguyen, Kamal Alameh, Youngjoo Chung Jan 2010

Cladding Modes Analysis Of Photonics Crystal Fiber For Refractive Index Sensors Using Finite Element Method, Naeem Khurram, Linh Viet Nguyen, Kamal Alameh, Youngjoo Chung

Research outputs pre 2011

We developed a Finite Element package to analyze cladding mode field extensions into the air-holes of photonics crystal fiber for refractive index sensing. Our analysis could determine the most sensitive cladding mode for liquid sensing.

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Aging, The Urban-Rural Gap And Disability Trends: 19 Years Of Experience In China - 1987 To 2006, Xiaoxia Peng, Shige Song, Sheena Sullivan, Jingjun Qiu, Wei Wang Jan 2010

Aging, The Urban-Rural Gap And Disability Trends: 19 Years Of Experience In China - 1987 To 2006, Xiaoxia Peng, Shige Song, Sheena Sullivan, Jingjun Qiu, Wei Wang

Research outputs pre 2011

As the age of a population increases, so too does the rate of disability. In addition, disability is likely to be more common in rural compared with urban areas. The present study aimed to examine the influence of rapid population changes in terms of age and rural/urban residence on the prevalence of disability. Data from the 1987 and 2006 China Sampling Surveys on Disability were used to estimate the impacts of rapid ageing and the widening urban-rural gap on the prevalence of disability. Stratum specific rates of disability were estimated by 5-year age-group and type of residence. The decomposition of …

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