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2010

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Groove Shape-Dependent Absorption Enhancement Of 850 Nm Msm Photodetectors With Nano-Gratings, Narottam Das, Ayman Karar, Mikhail Vasiliev, Chee Leong Tan, Kamal Alameh, Yong Tak Lee Jan 2010

Groove Shape-Dependent Absorption Enhancement Of 850 Nm Msm Photodetectors With Nano-Gratings, Narottam Das, Ayman Karar, Mikhail Vasiliev, Chee Leong Tan, Kamal Alameh, Yong Tak Lee

Research outputs pre 2011

Finite difference time-domain (FDTD) analysis is used to investigate the light absorption enhancement factor dependence on the groove shape of the nano-gratings etched into the surfaces of metal-semiconductor-metal photodetector (MSM-PD) structures. By patterning the MSM-PDs with optimized nano-gratings a significant improvement in light absorption near the design wavelength is achieved through plasmon-assisted electric field concentration effects. Simulation results show about 50 times light absorption enhancement for 850 nm light due to improved optical signal propagation through the nano-gratings.

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Absorption Enhancement Of Msm Photodetector Structure With A Plasmonic Double Grating Structure, Chee Leong Tan, Volodymyr V. Lysak, Narottam Das, Ayman Karar, Kamal Alameh, Yong Lee Jan 2010

Absorption Enhancement Of Msm Photodetector Structure With A Plasmonic Double Grating Structure, Chee Leong Tan, Volodymyr V. Lysak, Narottam Das, Ayman Karar, Kamal Alameh, Yong Lee

Research outputs pre 2011

We present finite difference time domain simulation to analyze the optical absorption enhancement of metal-semiconductor-metal photo detectors employing double plasmonic grating structures. Simulation results show that the combination of a subwavelength aperture and double nano-structured metal grating results in up to 25 times enhancement in optical absorption, in comparison to MSM photodetector structures employing only a subwavelength aperture. This improvement of the absorption enhancement is due to the coupling out function of the bottom grating structure which distributes the light to both side of the subwavelength aperture.

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Ignorant Experts: Computer And Network Security Support From Internet Service Providers, Patryk Szewczyk, Craig Valli Jan 2010

Ignorant Experts: Computer And Network Security Support From Internet Service Providers, Patryk Szewczyk, Craig Valli

Research outputs pre 2011

The paper examines the advice and support provided by seven major Internet Service Providers in Australia through late 2009 and early 2010 in relation to computer and network security. Previous research has indicated that many end-users will attempt to utilise the support provided by Internet Service Providers as a simple and effective method by which to obtain key information in regards to computer security. This paper demonstrates that in many cases the individuals working at the help desk are either reluctant to provide IT security support or have insufficient skill to provide the correct information.

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Behaviour Profiling On Mobile Devices, Fudong Li, Nathan Clarke, Maria Papadaki, Paul Dowland Jan 2010

Behaviour Profiling On Mobile Devices, Fudong Li, Nathan Clarke, Maria Papadaki, Paul Dowland

Research outputs pre 2011

Over the last decade, the mobile device has become a ubiquitous tool within everyday life. Unfortunately, whilst the popularity of mobile devices has increased, a corresponding increase can also be identified in the threats being targeted towards these devices. Security countermeasures such as AV and firewalls are being deployed, however, the increasing sophistication of the attacks requires additional measures to be taken. This paper proposes a novel behaviour-based profiling technique that is able to build upon the weaknesses of current systems by developing a comprehensive multilevel approach to profiling. In support of this model, a series of experiments have been …

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A Distributed And Cooperative User Authentication Framework, C.G. Hocking, Steven Furnell, Nathan Clarke, P L Reynolds Jan 2010

A Distributed And Cooperative User Authentication Framework, C.G. Hocking, Steven Furnell, Nathan Clarke, P L Reynolds

Research outputs pre 2011

As the requirement for companies and individuals to protect information and personal details comes more into focus, the implementation of security that goes beyond the ubiquitous password or Personal Identification Number (PIN) is paramount. With the ever growing number of us utilizing more than one device simultaneously, the problem and need is compounded. This paper proposes a novel approach to security that leverages the collective confidence of user identity held by the multiplicity of devices present at any given time. User identity confidence is reinforced by sharing established credentials between devices, enabling them to make informed judgments on their own …

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An Analysis Of Information Security Awareness Within Home And Work Environments, Shuhaili Talib, Nathan Clarke, Steven Furnell Jan 2010

An Analysis Of Information Security Awareness Within Home And Work Environments, Shuhaili Talib, Nathan Clarke, Steven Furnell

Research outputs pre 2011

As technology such as the Internet, computers and mobile devices become ubiquitous throughout society, the need to ensure our information remains secure is imperative. Unfortunately, it has long been understood that good security cannot be achieved through technical means alone and a solid understanding of the issues and how to protect yourself is required from users. Whilst many initiatives, programs and strategies have been proposed to improve the level of information security awareness, most have been directed at organizations, with a few national programs focused upon home users. Given people's use of technology is primarily focused upon those two areas: …

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An Online Ballistics Imaging System For Firearm Identification, Zhihu Huang, Jinsong Leng Jan 2010

An Online Ballistics Imaging System For Firearm Identification, Zhihu Huang, Jinsong Leng

Research outputs pre 2011

Since the traditional ballistics imaging system is dependent upon the expertise and experience of end-user, an intelligent ballistics imaging system is highly demanded to overcome the drawbacks of traditional techniques. This paper aims to develop a novel ballistics imaging system so as to combine the traditional functions with new features such as the line-scan image module, the characteristics extraction module, and the intelligent image processing module. With the help of these features, the new system can identify firearm more efficiently and effectively than the traditional techniques.

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A Novel Binarization Algorithm For Ballistics Imaging Systems, Zhihu Huang, Jinsong Leng Jan 2010

A Novel Binarization Algorithm For Ballistics Imaging Systems, Zhihu Huang, Jinsong Leng

Research outputs pre 2011

The identification of ballistics specimens from imaging systems is of paramount importance in criminal investigation. Binarization plays a key role in preprocess of recognizing cartridges in the ballistic imaging systems. Unfortunately, it is very difficult to get the satisfactory binary image using existing binary algorithms. In this paper, we utilize the global and local thresholds to enhance the image binarization. Importantly, we present a novel criterion for effectively detecting edges in the images. Comprehensive experiments have been conducted over sample ballistic images. The empirical results demonstrate the proposed method can provide a better solution than existing binary algorithms.

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Analysis Of Hu's Moment Invariants On Image Scaling And Rotation, Zhihu Huang, Jinsong Leng Jan 2010

Analysis Of Hu's Moment Invariants On Image Scaling And Rotation, Zhihu Huang, Jinsong Leng

Research outputs pre 2011

Moment invariants have been widely applied to image pattern recognition in a variety of applications due to its invariant features on image translation, scaling and rotation. The moments are strictly invariant for the continuous function. However, in practical applications images are discrete. Consequently, the moment invariants may change over image geometric transformation. To address this research problem, an analysis with respect to the variation of moment invariants on image geometric transformation is presented, so as to analyze the effect of image's scaling and rotation. Finally, the guidance is also provided for minimizing the fluctuation of moment invariants.

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Bullying In School And Cyberspace: Associations With Depressive Symptoms In Swiss And Australian Adolescents, Sonja Perren, Julian Dooley, Therese Shaw, Donna Cross Jan 2010

Bullying In School And Cyberspace: Associations With Depressive Symptoms In Swiss And Australian Adolescents, Sonja Perren, Julian Dooley, Therese Shaw, Donna Cross

Research outputs pre 2011

Background Cyber-bullying (i.e., bullying via electronic means) has emerged as a new form of bullying that presents unique challenges to those victimised. Recent studies have demonstrated that there is a significant conceptual and practical overlap between both types of bullying such that most young people who are cyber-bullied also tend to be bullied by more traditional methods. Despite the overlap between traditional and cyber forms of bullying, it remains unclear if being a victim of cyber-bullying has the same negative consequences as being a victim of traditional bullying. Method The current study investigated associations between cyber versus traditional bullying and …

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Employee Engagement With A Corporate Physical Activity Program: The Global Corporate Challenge, Pascal Scherrer, Lynnaire Sheridan, Ruth Sibson, Maria Ryan, Nadine Henley Jan 2010

Employee Engagement With A Corporate Physical Activity Program: The Global Corporate Challenge, Pascal Scherrer, Lynnaire Sheridan, Ruth Sibson, Maria Ryan, Nadine Henley

Research outputs pre 2011

Employers engage with corporate physical activity programs to foster employee wellbeing with a view to reducing the costs of absence and recruitment. This study reports on employee engagement with a commercial program, the Global Corporate Challenge, in terms of motivation, barriers, team dynamics, social aspects and self-reported physical activity levels. It uses guided introspection to explore how participation affected employee's motivation to sustain regular physical activity within the workplace setting. The program raised awareness of employees' individual physical activity levels and fostered social interaction in the workplace. Findings highlight the importance of employers providing a supportive context, fostering staff-led team …

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Inhaled Methoxyflurane And Intranasal Fentanyl For Prehospital Management Of Visceral Pain In An Australian Ambulance Service, Steven Johnston, Gary Wilkes, Jennifer Thompson, Melanie Ziman, Richard Brightwell Jan 2010

Inhaled Methoxyflurane And Intranasal Fentanyl For Prehospital Management Of Visceral Pain In An Australian Ambulance Service, Steven Johnston, Gary Wilkes, Jennifer Thompson, Melanie Ziman, Richard Brightwell

Research outputs pre 2011

Objective This study analysed the analgesic effect and changes in vital signs associated with administration of inhaled Methoxyflurane (MTX) and/or intranasal Fentanyl (INF) for prehospital management of visceral pain. Method A retrospective, observational study reviewing 1024 randomly selected records of patients with presumed visceral pain administered MTX (465), INF (397) or both (162) by the Western Australian Ambulance Service between January 2004 and February 2006. Clinical variables assessed included systolic blood pressure, pulse rate, respiration rate and Glasgow Coma Scale score. Pain was assessed utilising Visual/Verbal Analogue Scale pain scores. Results Overall effects on vital signs appeared favourable 5 min …

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A Practical Approach To Assess Depression Risk And To Guide Risk Reduction Strategies In Later Life, Osvaldo Almeida, Helman Alfonso, Jane Pirkis, Ngaire Kerse, Moira Sim, Leon Flicker, John Snowdon, Brian Draper, Gerard Byrne, Robert Goldney, Nicola Lautenschlager, Nigel Stocks, Marcia Scazufca, Martijn Huisman, Ricardo Araya, John Pfaff Jan 2010

A Practical Approach To Assess Depression Risk And To Guide Risk Reduction Strategies In Later Life, Osvaldo Almeida, Helman Alfonso, Jane Pirkis, Ngaire Kerse, Moira Sim, Leon Flicker, John Snowdon, Brian Draper, Gerard Byrne, Robert Goldney, Nicola Lautenschlager, Nigel Stocks, Marcia Scazufca, Martijn Huisman, Ricardo Araya, John Pfaff

Research outputs pre 2011

Background: Many factors have been associated with the onset and maintenance of depressive symptoms in later life, although this knowledge is yet to be translated into significant health gains for the population. This study gathered information about common modifiable and non-modifiable risk factors for depression with the aim of developing a practical probabilistic model of depression that can be used to guide risk reduction strategies. Methods: A cross-sectional study was undertaken of 20,677 community-dwelling Australians aged 60 years or over in contact with their general practitioner during the preceding 12 months. Prevalent depression (minor or major) according to the Patient …

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Vision Self-Management For Older Adults: A Randomised Controlled Trial, Sonya Girdler, Duncan P Boldy, Satvinder S Dhaliwal, Margaret Crowley, Tanya L Packer Jan 2010

Vision Self-Management For Older Adults: A Randomised Controlled Trial, Sonya Girdler, Duncan P Boldy, Satvinder S Dhaliwal, Margaret Crowley, Tanya L Packer

Research outputs pre 2011

Background/aims Ageing of the population will result in unprecedented numbers of older adults living with age-related vision loss (ARVL). Self-management models improve health outcomes and reduce healthcare costs; however, the principles have rarely been applied in low vision services. Methods A two-armed randomised controlled trial of older adults (n=77) with ARVL compared ‘usual care’ provided by a not-for-profit community agency with an extended model of care (usual care+self-management group intervention). The primary outcome variable (participation in life situations) was measured using the Activity Card Sort. Secondary outcome measures examined general health and vision-specific domains. Results The intention-to-treat analysis demonstrated that …

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Design Of High-Sensitivity Plasmonics-Assisted Gaas Metal-Semiconductor-Metal Photodetectors, Ayman Karar, Narottam Das, Chee Leong Tan, Kamal Alameh, Yong Lee Jan 2010

Design Of High-Sensitivity Plasmonics-Assisted Gaas Metal-Semiconductor-Metal Photodetectors, Ayman Karar, Narottam Das, Chee Leong Tan, Kamal Alameh, Yong Lee

Research outputs pre 2011

In this paper, we use the finite difference timedomain (FDTD) method to optimize the light absorption of an ultrafast plasmonic GaAs metal-semiconductor-metal photodetector (MSM-PD) employing metal nano-gratings. The MSM-PD is optimized geometrically, leading to improved light absorption near the designed wavelength of GaAs through plasmon-assisted electric and magnetic field concentration through a subwavelength aperture. Simulation results show up to 10-times light absorption enhancement at 867 nm due to surface plasmon polaritons (SPPs) propagation through the metal nano-grating, in comparison to conventional MSM-PD.

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A Proposed Methodology To Promote Adoption Of 'Green' Production By Small Firms, Elizabeth Walker, Janice Redmond, Margaret Giles Jan 2010

A Proposed Methodology To Promote Adoption Of 'Green' Production By Small Firms, Elizabeth Walker, Janice Redmond, Margaret Giles

Research outputs pre 2011

Small firms are critical to all economies but also have a significant negative impact on the environment. Their collective footprint equates to 60% of industrial pollution yet small firm owner-managers are not convinced of the necessity for behaviour change. This paper develops a proposed methodology to engage small firm owner-managers in 'green' production, in particular adoption of energy saving and waste recycling practices. This methodology includes a suggested approach to determining the 'tipping point' for the investment of time and resources by small firms. The paper argues that knowing the 'tipping point' and making a realistic business case should encourage …

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Distributed Sensing, Communications, And Power In Optical Fibre Smart Sensor Networks For Structural Health Monitoring, Graham Wild, Gary Allwood, Steven Hinckley Jan 2010

Distributed Sensing, Communications, And Power In Optical Fibre Smart Sensor Networks For Structural Health Monitoring, Graham Wild, Gary Allwood, Steven Hinckley

Research outputs pre 2011

With distributed optical fibre sensors, a single source, a single detector, and a single fibre can be used for up to 1000 fibre Bragg grating sensors. However, this multiplexing architecture is not robust. Damage to any of these individual components can render the entire sensing system useless. To achieve a robust structural health monitoring system, this type of multiplexing cannot be utilised. To overcome the lack of robustness associated with multiplexing optical fibre sensors together, intelligence along with sensors needs to be distributed around a structure. Distributed Optical Fibre Smarts Sensing (DOFSS) represents a sensing architecture for the structural health …

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A 1x2 Adaptive Optical Splitter Based On Opto-Vlsi Processor, Haithem Mustafa, Feng Xiao, Kamal Alameh Jan 2010

A 1x2 Adaptive Optical Splitter Based On Opto-Vlsi Processor, Haithem Mustafa, Feng Xiao, Kamal Alameh

Research outputs pre 2011

A 1×2 adaptive optical splitter structure is proposed and experimentally demonstrated. The 1×2 adaptive optical splitter structure is based on Opto-VLSI in conjunction with 4-f imaging system. An Opto-VLSI processor is software driven and capable of splitting an optical beam into different directions when a multicasting phase hologram is uploaded. An input optical signal launched into an input optical fiber port is split and coupled into two output optical fiber ports with arbitrary splitting ratios over a wavelength range exceeding 50 nm.

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High-Performance Thin-Film Garnet Materials For Magneto-Optic And Nanophotonic Applications, Mikhail Vasiliev, Mohammad Nur E Alam, Viacheslav Kotov, Kamal Alameh Jan 2010

High-Performance Thin-Film Garnet Materials For Magneto-Optic And Nanophotonic Applications, Mikhail Vasiliev, Mohammad Nur E Alam, Viacheslav Kotov, Kamal Alameh

Research outputs pre 2011

Since the 1960's, Magneto-optic (MO) garnet materials have been studied extensively. These materials can possess world-record MO performance characteristics in terms of Faraday rotation and optical quality. Among the rear-earth-doped garnets, the Bi-substituted iron garnet is the best candidate for use as a functional material in different integrated-optics, imaging/image processing applications and also in forward-looking applications e.g. the design of metamaterials with non-reciprocal properties. We have established a set of technologies for fabricating ferrimagnetic garnet films of type (BiDy)3(FeGa)5O12 and also garnet-oxide nanocomposite (BiDy)3(FeGa)5O12 : Bi2O3 layers possessing record-high MO quality across the visible spectral range using RF-magnetron sputtering and …

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The Pregnancy Hormones Human Chorionic Gonadotropin And Progesterone Induce Human Embryonic Stem Cell Proliferation And Differentiation Into Neuroectodermal Rosettes, Miguel Gallego, Prashob Porayette, Maria Kaltcheva, Richard Bowan, Sivan Vadakkadath Meethal, Craig Atwood Jan 2010

The Pregnancy Hormones Human Chorionic Gonadotropin And Progesterone Induce Human Embryonic Stem Cell Proliferation And Differentiation Into Neuroectodermal Rosettes, Miguel Gallego, Prashob Porayette, Maria Kaltcheva, Richard Bowan, Sivan Vadakkadath Meethal, Craig Atwood

Research outputs pre 2011

Introduction: The physiological signals that direct the division and differentiation of the zygote to form a blastocyst, and subsequent embryonic stem cell division and differentiation during early embryogenesis, are unknown. Although a number of growth factors, including the pregnancy-associated hormone human chorionic gonadotropin (hCG) are secreted by trophoblasts that lie adjacent to the embryoblast in the blastocyst, it is not known whether these growth factors directly signal human embryonic stem cells (hESCs). Methods: Here we used hESCs as a model of inner cell mass differentiation to examine the hormonal requirements for the formation of embryoid bodies (EB’s; akin to blastulation) …

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Application Of A Data Mining Framework For The Identification Of Agricultural Production Areas In Wa, Yunous Vagh, Leisa Armstrong, Dean Diepeveen Jan 2010

Application Of A Data Mining Framework For The Identification Of Agricultural Production Areas In Wa, Yunous Vagh, Leisa Armstrong, Dean Diepeveen

Research outputs pre 2011

This paper will propose a data mining framework for the identification of agricultural production areas ill WA. The data mining (DM) framework was developed with the aim of enhancing the analysis of agricultural datasets compared to currently used statistical methods. The DM framework is a synthesis of different technologies brought together for the purpose of enhancing the interrogation of these datasets. The DM framework is based on the data, information, knowledge and wisdom continuum as a horizontal axis, with DM and online analytical processing (OLAP) forming the vertical axis. In addition the DM framework incorporates aspects of data warehousing phases, …

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Women's Knowledge And Attitudes Regarding Alcohol Consumption In Pregnancy: A National Survey, Elizabeth Peadon, Jan Payne, Nadine Henley, Heather D'Antoine, Anne Bartu, Colleen O'Leary, Carol Bower, Elizabeth Elliott Jan 2010

Women's Knowledge And Attitudes Regarding Alcohol Consumption In Pregnancy: A National Survey, Elizabeth Peadon, Jan Payne, Nadine Henley, Heather D'Antoine, Anne Bartu, Colleen O'Leary, Carol Bower, Elizabeth Elliott

Research outputs pre 2011

Background: Alcohol exposure in pregnancy is a common and modifiable risk factor for poor pregnancy and child outcomes. Alcohol exposure in pregnancy can cause a range of physical and neurodevelopmental problems in the child including the Fetal Alcohol Spectrum Disorders (FASD). In order to improve prevention strategies, we sought to describe the knowledge and attitudes of women of childbearing age regarding alcohol consumption during pregnancy and its effects on the fetus. Methods: We conducted a national cross-sectional survey via computer assisted telephone interview of 1103 Australian women aged 18 to 45 years. Participants were randomly selected from the Electronic White …

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Interrogation Of Water Catchment Data Sets Using Data Mining Techniques, Ajdin Sehovic, Leisa Armstrong, Dean Diepeveen Jan 2010

Interrogation Of Water Catchment Data Sets Using Data Mining Techniques, Ajdin Sehovic, Leisa Armstrong, Dean Diepeveen

Research outputs pre 2011

Current environmental challenges such as increasing dry land salinity, water logging, eutrophication and high nutrient runoff in south western regions of Western Australia (WA) may have both cultural and environmental implications in the near future. Advances in computing through the application of data mining ,and geographic information services provide the tools to conduct •studies that can indicate possible changes in these water catchment areas of WA. The research examines the existing spatial data mining techniques that can be used to interpret trends in WA water catchment land use. Large GIS data sets of the water catchments on Peel-Harvey region have …

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Predicting Memory Decline As A Risk Factor For Alzheimer's Disease In Older Post-Menopausal Women: Quod Erat Demonstrandum?, Mark Rodrigues, Jonathan Foster, Giuseppe Verdile, Karen Joesbury, Richard Prince, Amanda Devine, Pankaj Mehta, John Beilby, Ralph Martins Jan 2010

Predicting Memory Decline As A Risk Factor For Alzheimer's Disease In Older Post-Menopausal Women: Quod Erat Demonstrandum?, Mark Rodrigues, Jonathan Foster, Giuseppe Verdile, Karen Joesbury, Richard Prince, Amanda Devine, Pankaj Mehta, John Beilby, Ralph Martins

Research outputs pre 2011

Alzheimer's disease (AD) is the major form of age-related dementia worldwide, accounting for more than two-thirds of all dementia cases. The disease is characterized by a progressive loss of cognitive and intellectual functioning (Gilman, 1997). A number of risk factors for AD have been identified. The prevalence of AD increases with age, diabetes, depression, family history of Parkinson's disease and following head injury or exposure to solvents (Jorm et al., 1991; van Duijn et al., 1991; Ott et al., 1995; Yoshitake et al., 1995; Devanand et al., 1996). Published research further suggests that low education levels are associated with increased …

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Comparison Between Neural Network Based Pi And Pid Controllers, Mohammed Hassan, Ganesh Kothapalli Jan 2010

Comparison Between Neural Network Based Pi And Pid Controllers, Mohammed Hassan, Ganesh Kothapalli

Research outputs pre 2011

The Pneumatic actuation systems are widely used in industrial automation, such as drilling, sawing, squeezing, gripping, and spraying. Also, they are used in motion control of materials and parts handling, packing machines, machine tools, and in robotics; e.g. two-legged robot. In this paper, a Neural Network based PI controller and Neural Network based PID controller are designed and simulated to increase the position accuracy in a pneumatic servo actuator. In these designs, a well-trained Neural Network provides these controllers with suitable gains depending on feedback representing changes in position error and changes in external load force. These gains should keep …

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Extensive Proteomic Screening Identifies The Obesity-Related Nyggf4 Protein As A Novel Lrp1-Interactor, Showing Reduced Expression In Early Alzheimer's Disease, Yuji Kajiwara, Sonia Franciosi, Nagahide Takahashi, Lisa Krug, James Schmeidler, Kevin Taddei, Vahram Haroutunian, Ulrik Fried, Michelle Ehrlich, Ralph Martins, Samuel Evans Gandy Jan 2010

Extensive Proteomic Screening Identifies The Obesity-Related Nyggf4 Protein As A Novel Lrp1-Interactor, Showing Reduced Expression In Early Alzheimer's Disease, Yuji Kajiwara, Sonia Franciosi, Nagahide Takahashi, Lisa Krug, James Schmeidler, Kevin Taddei, Vahram Haroutunian, Ulrik Fried, Michelle Ehrlich, Ralph Martins, Samuel Evans Gandy

Research outputs pre 2011

Background The low-density lipoprotein receptor related protein 1 (LRP1) has been implicated in Alzheimer's disease (AD) but its signalling has not been fully evaluated. There is good evidence that the cytoplasmic domain of LRP1 is involved in protein-protein interactions, important in the cell biology of LRP1. Results We carried out three yeast two-hybrid screens to identify proteins that interact with the cytoplasmic domain of LRP1. The screens included both conventional screens as well as a novel, split-ubiquitin-based screen in which an LRP1 construct was expressed and screened as a transmembrane protein. The split-ubiquitin screen was validated in a screen using …

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Financial Market Integration In The Greater China Region: A Multivariate Asymmetric Approach, K.Y. Ho, Zhaoyong Zhang Jan 2010

Financial Market Integration In The Greater China Region: A Multivariate Asymmetric Approach, K.Y. Ho, Zhaoyong Zhang

Research outputs pre 2011

This paper examines the volatility dynamics of the greater China stock markets (Shanghai A- and B-shares, Shenzhen A- and B-shares, Taiwan, and Hong Kong) by employing a multivariate (tetravariate) framework that incorporates the features of asymmetries, persistence, and time-varying correlations, which are typically observed in stock markets of developed economies. Our results indicate that, unlike the Shenzhen and Shanghai Ashares, Hong Kong and Taiwan markets, the B-share markets do not exhibit significant asymmetric volatility (“leverage effect”), and return volatility in the A-share market is substantially higher than the B-share market before April 1997, but this result is reversed after that. …

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Call Admission Control Scheme For Improved Quality Of Service In Wimax Communication At Vehicular Speeds, Iftekhar Ahmad, Daryoush Habibi Jan 2010

Call Admission Control Scheme For Improved Quality Of Service In Wimax Communication At Vehicular Speeds, Iftekhar Ahmad, Daryoush Habibi

Research outputs pre 2011

The IEEE 802.16e standard, also known as mobile WiMAX, has emerged as an exciting mobile wireless communication technology that promises to offer both high throughput and guaranteed quality of service (QoS). Call admission control (CAC) scheme serves as a useful tool for WiMAX, which ensures that resources are not overcommitted and thereby, all existing connections enjoy guaranteed QoS. Existing CAC schemes largely depend on readily available information like currently available resources and bandwidth demand of the new call while making an acceptance or rejection decision once a new request arrives. Since wireless channels are not as reliable as wired communication, …

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The Influence Of Elliptical Chainrings On 10 Km Cycling Time Trial Performance, Jeremiah Peiffer, Chris Abbiss Jan 2010

The Influence Of Elliptical Chainrings On 10 Km Cycling Time Trial Performance, Jeremiah Peiffer, Chris Abbiss

Research outputs pre 2011

The use of elliptical chainrings (also called chainwheels or sprockets) has gained considerable interest in the amateur and professional cycling community. evertheless, we are unaware of any scientific studies that have examined the performancebenefits of using elliptical chainrings during an actual performance trial. Therefore, this study examined the influence of elliptical chainring use on physiological and performance parameters during a 10 km cycling time trial. Nine male cyclistscompleted, in a counterbalanced order, three 10 km cycling time trials using either a standard chainring or an elliptical chainring at two distinct settings. An attempt was made to blind the cyclists to …

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Examining Pacing Profiles In Elite Female Road Cyclists Using Exposure Variation Analysis, Chris Abbiss, Leon Straker, Marc Quod, David Martin, Paul Laursen Jan 2010

Examining Pacing Profiles In Elite Female Road Cyclists Using Exposure Variation Analysis, Chris Abbiss, Leon Straker, Marc Quod, David Martin, Paul Laursen

Research outputs pre 2011

Objective In this study, the amplitude and time distribution of power output in a variety of competitive cycling events through the use of a new mathematical analysis was examined: exposure variation analysis (EVA). Design Descriptive field study. Setting Various professional road cycling events, including; a 5-day—eight-stage tour race, a 1-day World Cup event and the Australian National Individual Time Trial Championships. Participants 9 elite female cyclists (mean (SD), mass = 57.8 (3.4) kg, height = 167.3 (2.8) cm, Vo2peak = 63.2 (5.2) ml kg−1 min−1). Interventions None. Main outcome measurements The variation in power output and the quantification of the …

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