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6177 full-text articles. Page 6 of 224.

Site-Specific Atomic-Scale Characterisation Of Retained Austenite In A Strip Cast Trip Steel, Zhiping Xiong, Ahmed A. Saleh, Ross Marceau, A S. Taylor, N E. Stanford, Andrii Kostryzhev, Elena V. Pereloma 2017 University of Science And Technology Beijing

Site-Specific Atomic-Scale Characterisation Of Retained Austenite In A Strip Cast Trip Steel, Zhiping Xiong, Ahmed A. Saleh, Ross Marceau, A S. Taylor, N E. Stanford, Andrii Kostryzhev, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

Knowledge of carbon content in retained austenite (RA) with different neighbouring phases is essential to understand the chemical stability of RA, which is useful for microstructure tuning of transformation-induced plasticity (TRIP) steels. The present study investigates different morphologies and chemical compositions of RA by correlating electron backscattering diffraction, transmission electron microscopy and atom probe tomography. The effect of neighbouring phases, such as polygonal ferrite, bainitic ferrite lath, ferrite in granular bainite and carbides, on the carbon content in the RA is investigated. The results reveal that the film RA morphology does not always have a higher carbon content than the ...


The Impact Of The Mode Of Survey Administration On Estimates Of Daily Smoking For Mobile Phone Only Users, Joseph Hanna, Damien V. Cordery, David G. Steel, Walter R. Davis, Timothy Harrold 2017 New South Wales Health

The Impact Of The Mode Of Survey Administration On Estimates Of Daily Smoking For Mobile Phone Only Users, Joseph Hanna, Damien V. Cordery, David G. Steel, Walter R. Davis, Timothy Harrold

Faculty of Engineering and Information Sciences - Papers: Part B

Background: Over the past decade, there have been substantial changes in landline and mobile phone ownership, with a substantial increase in the proportion of mobile-only households. Estimates of daily smoking rates for the mobile phone only (MPO) population have been found to be substantially higher than the rest of the population and telephone surveys that use a dual sampling frame (landline and mobile phones) are now considered best practice. Smoking is seen as an undesirable behaviour; measuring such behaviours using an interviewer may lead to lower estimates when using telephone based surveys compared to self-administered approaches. This study aims to ...


Trucks Are Destroying Our Roads And Not Picking Up The Repair Cost, Philip G. Laird 2017 University of Wollongong

Trucks Are Destroying Our Roads And Not Picking Up The Repair Cost, Philip G. Laird

Faculty of Engineering and Information Sciences - Papers: Part B

It's high time Australia changed its current road user charges for trucks. The shortfall between the charges for heavy vehicles and the money spent on things like road system maintenance, construction costs, road crashes involving heavy trucks, emissions, pollution and urban road congestion amounts to a taxpayer subsidy for the industry of at least A$3 billion per annum. The current charges, like those of cars, rely only on annual registration fees and fuel taxation. Instead Australia should be following the lead of New Zealand, Switzerland and some other European countries and introducing a charge system based on mass ...


The Geometric Triharmonic Heat Flow Of Immersed Surfaces Near Spheres, James A. McCoy, Scott Parkins, Glen Wheeler 2017 University of Wollongong

The Geometric Triharmonic Heat Flow Of Immersed Surfaces Near Spheres, James A. Mccoy, Scott Parkins, Glen Wheeler

Faculty of Engineering and Information Sciences - Papers: Part B

We consider closed immersed surfaces in R^3 evolving by the geometric triharmonic heat flow. Using local energy estimates, we prove interior estimates and a positive absolute lower bound on the lifespan of solutions depending solely on the local concentration of curvature of the initial immersion in L^2. We further use an {\epsilon}-regularity type result to prove a gap lemma for stationary solutions. Using a monotonicity argument, we then prove that a blowup of the flow approaching a singular time is asymptotic to a non-umbilic embedded stationary surface. This allows us to conclude that any solution with initial ...


Reinforcing Synchronization Securely In Online Contests With Embedded Computing, Wei Wang, Peng Xu, Laurence T. Yang, Willy Susilo, Jinjun Chen 2017 Huazhong University of Science and Technology

Reinforcing Synchronization Securely In Online Contests With Embedded Computing, Wei Wang, Peng Xu, Laurence T. Yang, Willy Susilo, Jinjun Chen

Faculty of Engineering and Information Sciences - Papers: Part B

When competing in eBay bidding, online games or e-exams in embedded computing environments, people naturally face asynchronous starts from different computing devices, which is treated as a security risk of online contests. The security risks of online contest also include eavesdropping during data transmission without intended rights, and false start by malicious competitors, which also means asynchrony in contests. Accordingly, online contests need security guarantee especially on synchronization. In this paper, for synchronic and secure start in a contest, we update security requirements of confidentiality, anonymity and synchrony comparing to our previous work. Based on the updated requirements, we propose ...


Towards Massive Data And Sparse Data In Adaptive Micro Open Educational Resource Recommendation: A Study On Semantic Knowledge Base Construction And Cold Start Problem, Geng Sun, Tingru Cui, Ghassan Beydoun, Shiping Chen, Fang Dong, Dongming Xu, Jun Shen 2017 University of Wollongong

Towards Massive Data And Sparse Data In Adaptive Micro Open Educational Resource Recommendation: A Study On Semantic Knowledge Base Construction And Cold Start Problem, Geng Sun, Tingru Cui, Ghassan Beydoun, Shiping Chen, Fang Dong, Dongming Xu, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

Micro Learning through open educational resources (OERs) is becoming increasingly popular. However, adaptive micro learning support remains inadequate by current OER platforms. To address this, our smart system, Micro Learning as a Service (MLaaS), aims to deliver personalized OER with micro learning to satisfy their real-time needs.


Towards Elucidating The Structural Principles Of Host-Pathogen Protein-Protein Interaction Networks: A Bioinformatics Survey, Huaming Chen, Jiangning Song, Geng Sun, Jun Shen, Lei Wang 2017 University of Wollongong

Towards Elucidating The Structural Principles Of Host-Pathogen Protein-Protein Interaction Networks: A Bioinformatics Survey, Huaming Chen, Jiangning Song, Geng Sun, Jun Shen, Lei Wang

Faculty of Engineering and Information Sciences - Papers: Part B

The ultimate goal of systems biology research area is to accurately predict the behavior of biological systems through the construction of computational models, using the related molecular-level data as the input, especially when the structural information of such biological system is available. Combining the three-dimensional (3D) structural information of the cohort of macromolecules underpinning the biological system, the researchers are poised with an unprecedented opportunity to gain a full understanding on how the molecules interact with each other, particularly for an interaction network, e.g. protein-protein interaction networks. Specifically, there are currently a limited number of studies focused on the ...


Privacy-Preserving Mutual Authentication In Rfid With Designated Readers, Fuchun Guo, Yi Mu, Willy Susilo, Vijay Varadharajan 2017 University of Wollongong

Privacy-Preserving Mutual Authentication In Rfid With Designated Readers, Fuchun Guo, Yi Mu, Willy Susilo, Vijay Varadharajan

Faculty of Engineering and Information Sciences - Papers: Part B

We study privacy-preserving mutual authentication in radio-frequency identification systems with designated readers (PP-MADR in short). In PP-MADR, each tag has its designated-reader group instead of all readers, and only tags and their designated readers can authenticate each other. Other readers and adversaries cannot trace tags or know their designated readers. The most challenging task of constructing such a PP-MADR protocol is the verification of reader designation without compromising tag privacy. We found that traditional solutions are impractical due to linear storage growth on tags, linear computation growth on tags, or requiring new key generations for designated readers. In this paper ...


The Architecture Of An Effective Software Application For Managing Enterprise Projects, Reza R. Zamani, Robert B. K Brown, Ghassan Beydoun, William J. Tibben 2017 University of Wollongong

The Architecture Of An Effective Software Application For Managing Enterprise Projects, Reza R. Zamani, Robert B. K Brown, Ghassan Beydoun, William J. Tibben

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.


Mergeable And Revocable Identity-Based Encryption, Shengmin Xu, Guomin Yang, Yi Mu, Willy Susilo 2017 University of Wollongong

Mergeable And Revocable Identity-Based Encryption, Shengmin Xu, Guomin Yang, Yi Mu, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

Identity-based encryption (IBE) has been extensively studied and widely used in various applications since Boneh and Franklin proposed the first practical scheme based on pairing. In that seminal work, it has also been pointed out that providing an efficient revocation mechanism for IBE is essential. Hence, revocable identity-based encryption (RIBE) has been proposed in the literature to offer an efficient revocation mechanism. In contrast to revocation, another issue that will also occur in practice is to combine two or multiple IBE systems into one system, e.g., due to the merge of the departments or companies. However, this issue has ...


Decompression Modelling Of Pipelines Carrying Co2-N2 Mixture And The Influence Of Non-Equilibrium Phase Transition, Bin Liu, Xiong Liu, Cheng Lu, Ajit R. Godbole, Guillaume Michal, Anh Kiet Tieu 2017 University of Wollongong

Decompression Modelling Of Pipelines Carrying Co2-N2 Mixture And The Influence Of Non-Equilibrium Phase Transition, Bin Liu, Xiong Liu, Cheng Lu, Ajit R. Godbole, Guillaume Michal, Anh Kiet Tieu

Faculty of Engineering and Information Sciences - Papers: Part B

The Carbon Capture and Storage (CCS) is the technology that has been proposed to reduce high concentrations of CO2 in the atmosphere. This method involves transporting the CO2 to the storage site, usually in pipelines. In order to ensure safe transport, the required pipe toughness must be accurately estimated. This, in turn, requires an accurate estimate of the decompression wave speed in the fluid. In this paper, a multi-phase Computational Fluid Dynamics (CFD) model is presented to simulate the decompression of a CO2-N2 mixture in a pipe. A real gas EOS (GERG-2008) was incorporated into ...


Analysis Of Hydrodynamic Mechanism On Particles Focusing In Micro-Channel Flows, Qikun Wang, Dan Yuan, Weihua Li 2017 University of Wollongong

Analysis Of Hydrodynamic Mechanism On Particles Focusing In Micro-Channel Flows, Qikun Wang, Dan Yuan, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, the hydrodynamic mechanism of moving particles in laminar micro-channel flows was numerically investigated. A hydrodynamic criterion was proposed to determine whether particles in channel flows can form a focusing pattern or not. A simple formula was derived to demonstrate how the focusing position varies with Reynolds number and particle size. Based on this proposed criterion, a possible hydrodynamic mechanism was discussed as to why the particles would not be focused if their sizes were too small or the channel Reynolds number was too low. The Re-¿ curve (Re, ¿ respectively represents the channel-based Reynolds number and the particle ...


Numerical Investigation Into The Effect Of Natural Fracture Density On Hydraulic Fracture Network Propagation, Zhaohui Chong, Xuehua Li, Xiangyu Chen, Ji Zhang, Jingzheng Lu 2017 University of Wollongong, China University of Mining and Technology

Numerical Investigation Into The Effect Of Natural Fracture Density On Hydraulic Fracture Network Propagation, Zhaohui Chong, Xuehua Li, Xiangyu Chen, Ji Zhang, Jingzheng Lu

Faculty of Engineering and Information Sciences - Papers: Part B

Hydraulic fracturing is an important method to enhance permeability in oil and gas exploitation projects and weaken hard roofs of coal seams to reduce dynamic disasters, for example, rock burst. It is necessary to fully understand the mechanism of the initiation, propagation, and coalescence of hydraulic fracture network (HFN) caused by fluid flow in rock formations. In this study, a coupled hydro-mechanical model was built based on synthetic rock mass (SRM) method to investigate the effects of natural fracture (NF) density on HFN propagation. Firstly, the geometrical structures of NF obtained from borehole images at the field scale were applied ...


Comprehensive Gait Analysis Of Healthy Older People: Unveiling Reasons For Lack Of Long-Distance Walking, Mustafa M. Elhadi, Christina Ma, Duo Wong, Anson Wan, Winson Lee 2017 The Hong Kong Polytechnic University

Comprehensive Gait Analysis Of Healthy Older People: Unveiling Reasons For Lack Of Long-Distance Walking, Mustafa M. Elhadi, Christina Ma, Duo Wong, Anson Wan, Winson Lee

Faculty of Engineering and Information Sciences - Papers: Part B

Many older adults do not adhere to the recommended physical activity levels. This study examines the gait changes upon long-distance walking among healthy older adults. Gait tests of 24 adults aged 65 or more were conducted at the baseline, at the end of 30 and 60 minutes of treadmill walk. Spatial temporal, kinematic and kinetic gait data were computed. Perceived level of exertion was evaluated for each subject. Ten subjects (Group B) perceived higher exertion level than the remaining fourteen subjects (Group A). After walking, group B had significant reductions in dominant-side ankle joint range of motion and power, suggesting ...


R Package Asmap: Efficient Genetic Linkage Map Construction And Diagnosis, J D. Taylor, David G. Butler 2017 University of Adelaide

R Package Asmap: Efficient Genetic Linkage Map Construction And Diagnosis, J D. Taylor, David G. Butler

Faculty of Engineering and Information Sciences - Papers: Part B

Although various forms of linkage map construction software are widely available, there is a distinct lack of packages for use in the R statistical computing environment (R Core Team 2017). This article introduces the ASMap linkage map construction R package which contains functions that use the efficient MSTmap algorithm (Wu, Bhat, Close, and Lonardi 2008) for clustering and optimally ordering large sets of markers. Additional to the construction functions, the package also contains a suite of tools to assist in the rapid diagnosis and repair of a constructed linkage map. The package functions can also be used for post linkage ...


Modelling Dynamic Fracture Propagation In Rock, Gaetano Venticinque, Jan Nemcik 2017 University of Wollongong

Modelling Dynamic Fracture Propagation In Rock, Gaetano Venticinque, Jan Nemcik

Faculty of Engineering and Information Sciences - Papers: Part B

Fracture propagation in brittle rock is very fast and highly dynamic. Typically this process consists of fracture initiation, propagation and termination. Growth of micro-fractures is conceptually and numerically well established, however, current practices to model fracture propagation in rock employs slow evolving static regimes that do not represent the true nature of fracture propagation in the laboratory or the field. This paper presents a newly developed numerical approach using Micro-Brittle Dynamics theory to model the propagation of fractures through rock in real time. This work presented here is based on a newly developed Dynamic Rock Fracture Model (DRFM2D ) and ...


Innovative Approach To Monitoring Coal Pillar Deformation And Roof Movement Using 3d Laser Technology, Vlastimil Kajzar, Radovan Kukutsch, Petr Waclawik, Jan Nemcik 2017 Institute of Geonics of CAS

Innovative Approach To Monitoring Coal Pillar Deformation And Roof Movement Using 3d Laser Technology, Vlastimil Kajzar, Radovan Kukutsch, Petr Waclawik, Jan Nemcik

Faculty of Engineering and Information Sciences - Papers: Part B

Monitoring of pillar and roadway deformations is one of the most important issues in geotechnical engineering and mining practice. The use of 3D laser technology is ideal to monitor strata displacements in underground excavations enabling complex spatial data capture of the entire space around monitored pillars including all roof and rib deformation which occurs during the pillar excavation. This method based on repeated scans, can monitor the excavation surface movement ranging from a few mm to more than 600 mm. The 3D laser scanner was used to monitor the coal mine roadways and pillar stability in room and pillar panel ...


Tower Load Analysis Of Offshore Wind Turbines And The Effects Of Aerodynamic Damping, Xiong Liu, Cheng Lu, Gangqiang Li, Ajit R. Godbole, Yan Chen 2017 University of Wollongong

Tower Load Analysis Of Offshore Wind Turbines And The Effects Of Aerodynamic Damping, Xiong Liu, Cheng Lu, Gangqiang Li, Ajit R. Godbole, Yan Chen

Faculty of Engineering and Information Sciences - Papers: Part B

This study presents an analysis of the loads on offshore Horizontal Axis Wind Turbines (HAWTs). The aerodynamic loads are estimated using the Blade Element-Momentum (BEM) theory, including the effects of dynamic inflow and dynamic stall. The wave loads are calculated using Morison's equation. Models are proposed to account for the effects of aerodynamic damping on the fatigue loading on the tower during its working lifetime. Load analysis of a 5 MW offshore HAWT is carried out and the influence of aerodynamic damping on the fatigue load is investigated.


Does Mathematical Study Develop Logical Thinking? Testing The Theory Of Formal Discipline, Rodney Nillsen 2017 University of Wollongong

Does Mathematical Study Develop Logical Thinking? Testing The Theory Of Formal Discipline, Rodney Nillsen

Faculty of Engineering and Information Sciences - Papers: Part B

Book review of Inglis , M. and Attridge, N. (2016). Does Mathematical Study Develop Logical Thinking? Testing the Theory of Formal Discipline. London: World Scientific Publishing Europe Ltd.


The Frontiers Of Technology In Warhead Verification, Henrietta N. Toivanen 2017 Claremont McKenna College

The Frontiers Of Technology In Warhead Verification, Henrietta N. Toivanen

CMC Senior Theses

How might new technical verification capabilities enhance the prospects of success in future nuclear arms control negotiations? Both theory and evidence suggest that verification technologies can influence the dynamics of arms control negotiations by shaping and constraining the arguments and strategies that are available to the involved stakeholders. In the future, new technologies may help transcend the specific verification challenge of high-security warhead authentication, which is a verification capability needed in future disarmament scenarios that address fewer warheads, limit new categories of warheads, and involve nuclear weapons states other than the United States and Russia. Under these circumstances, the core ...


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