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6132 full-text articles. Page 6 of 221.

An Efficient And Provably Secure Rfid Grouping Proof Protocol, Shu Cheng, Vijay Varadharajan, Yi Mu, Willy Susilo 2017 Macquarie University

An Efficient And Provably Secure Rfid Grouping Proof Protocol, Shu Cheng, Vijay Varadharajan, Yi Mu, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part A

RFID Grouping proof convinces an offline verifier that multiple tags are simultaneously scanned. Various solutions have been proposed but most of them have security and privacy vulnerabilities. In this paper, we propose an elliptic-curve-based RFID grouping proof protocol. Our protocol is proven secure and narrow-strong private. We also demonstrate that our grouping proof can be batch verified to improve the efficiency for large-scale RFID systems and it is suitable for low-cost RFID tags.


Bots Without Borders: How Anonymous Accounts Hijack Political Debate, Katina Michael 2017 University of Wollongong

Bots Without Borders: How Anonymous Accounts Hijack Political Debate, Katina Michael

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Linearization Of Ebt3 Film Dose Response And Virtual Film Dosimetry For Sbrt Quality Assurance, Meng Cai, Ben Archibald-Heeren, Yang Wang, Peter E. Metcalfe 2017 University of Wollongong

Linearization Of Ebt3 Film Dose Response And Virtual Film Dosimetry For Sbrt Quality Assurance, Meng Cai, Ben Archibald-Heeren, Yang Wang, Peter E. Metcalfe

Faculty of Engineering and Information Sciences - Papers: Part A

EBT3 film offers high spatial resolution and low energy dependence, making it a suitable choice for quality assurance where high dose gradients are present, such as the case for SBRT. This work presents a simple method to adjust scanner settings so that dose response becomes linear. This linearity eliminates the need to obtain a calibration curve and associated uncertainties in curve fitting. Relative dosimetry can be performed after dose normalization to a reference point. Linearity is also a more robust condition than calibration curve with respect to scanner warm-up conditions, resulting in reduced uncertainty in dose measurement. An in-house developed ...


The Angular Dependence Of A Two Dimensional Monolithic Detector Array For Dosimetry In Small Radiation Fields, Nauljun Stansook, Marco Petasecca, Kananan Utitsarn, Matthew Newall, Peter E. Metcalfe, Martin G. Carolan, Michael L. F Lerch, Anatoly B. Rosenfeld 2017 University of Wollongong

The Angular Dependence Of A Two Dimensional Monolithic Detector Array For Dosimetry In Small Radiation Fields, Nauljun Stansook, Marco Petasecca, Kananan Utitsarn, Matthew Newall, Peter E. Metcalfe, Martin G. Carolan, Michael L. F Lerch, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

The purpose of this study is to investigate the directional dependence of a two dimensional monolithic detector array (M512) under 6 MV photon irradiation and to evaluate the effect of field size on angular dependence. Square fields of sizes: 3x3 cm2 and 10x10 cm2 were measured at the iso-centre of a cylindrical phantom. Beam angles with incidences from 00- 1800 in increments of 150 were used to investigate the central pixel angular response of M512, normalized to the pixel response for normal (0°) beam incidence. The angular response of the detector was compared to the ...


Experimental Studies With Two Novel Silicon Detectors For The Development Of Time-Of-Flight Spectrometry Of Laser-Accelerated Proton Beams, M Würl, S Reinhardt, Anatoly B. Rosenfeld, Marco Petasecca, Michael L. F Lerch, Linh T. Tran, S Karsch, W Assmann, J Schreiber, Katia Parodi 2017 Ludwig Maximilian University of Munich

Experimental Studies With Two Novel Silicon Detectors For The Development Of Time-Of-Flight Spectrometry Of Laser-Accelerated Proton Beams, M Würl, S Reinhardt, Anatoly B. Rosenfeld, Marco Petasecca, Michael L. F Lerch, Linh T. Tran, S Karsch, W Assmann, J Schreiber, Katia Parodi

Faculty of Engineering and Information Sciences - Papers: Part A

Laser-accelerated proton beams exhibit remarkably different beam characteristics as compared to conventionally accelerated ion beams. About 105 to 107 particles per MeV and msr are accelerated quasi-instantaneously within about 1 ps. The resulting energy spectrum typically shows an exponentially decaying distribution. Our planned approach to determine the energy spectrum of the particles generated in each pulse is to exploit the time-of-flight (TOF) difference of protons with different kinetic energies at 1 m distance from the laser-target interaction. This requires fast and sensitive detectors. We therefore tested two prototype silicon detectors, developed at the Centre for Medical Radiation Physics ...


New Silicon Microdosimetry Probes For Rbe And Biological Dose Studies Using Stationary And Movable Targets In 12C Ion Therapy, Lachlan Chartier, Linh T. Tran, David Bolst, Alex Pogossov, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Vladimir Perevertaylo, Michael A. Jackson, Naruhiro Matsufuji, Anatoly B. Rosenfeld 2017 University of Wollongong

New Silicon Microdosimetry Probes For Rbe And Biological Dose Studies Using Stationary And Movable Targets In 12C Ion Therapy, Lachlan Chartier, Linh T. Tran, David Bolst, Alex Pogossov, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Vladimir Perevertaylo, Michael A. Jackson, Naruhiro Matsufuji, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

Due to the high LET and dense ionisation tracks associated with ions, microdosimetric approaches have been used in carbon ion therapy to assess field quality and calculate radiobiological quantities for a variety of cell lines. There is however a lack of instrumentation for simple and routine use in a clinical environment, important for determination of RBE which provides accurate treatment planning and delivery in hadron therapy. In this study, a 10 μm thick silicon microdosimeter with 3D sensitive volumes has been used to investigate the effect of motion on the RBE and field quality of a typical 12C ion ...


Stir Casting Process For Manufacture Of Al-Sic Composites, Shahin Soltani, R Azari Khosroshahi, R Taherzadeh Mousavian, Zhengyi Jiang, Alireza Fadavi Boostani, D Brabazon 2017 Sahand University of Technology

Stir Casting Process For Manufacture Of Al-Sic Composites, Shahin Soltani, R Azari Khosroshahi, R Taherzadeh Mousavian, Zhengyi Jiang, Alireza Fadavi Boostani, D Brabazon

Faculty of Engineering and Information Sciences - Papers: Part A

Stir casting is an economical process for the fabrication of aluminum matrix composites. There are many parameters in this process, which affect the final microstructure and mechanical properties of the composites. In this study, micron-sized SiC particles were used as reinforcement to fabricate Al-3 wt% SiC composites at two casting temperatures (680 and 850 °C) and stirring periods (2 and 6 min). Factors of reaction at matrix/ceramic interface, porosity, ceramic incorporation, and agglomeration of the particles were evaluated by scanning electron microscope (SEM) and high-resolution transition electron microscope (HRTEM) studies. From microstructural characterizations, it is concluded that the shorter ...


Sharing Social Network Data: Differentially Private Estimation Of Exponential Family Random-Graph Models, Vishesh Karwa, Pavel N. Krivitsky, Aleksandra B. Slavkovic 2017 Carnegie Mellon University

Sharing Social Network Data: Differentially Private Estimation Of Exponential Family Random-Graph Models, Vishesh Karwa, Pavel N. Krivitsky, Aleksandra B. Slavkovic

Faculty of Engineering and Information Sciences - Papers: Part A

Motivated by a real life problem of sharing social network data that contain sensitive personal information, we propose a novel approach to release and analyse synthetic graphs to protect privacy of individual relationships captured by the social network while maintaining the validity of statistical results. A case-study using a version of the Enron e-mail corpus data set demonstrates the application and usefulness of the proposed techniques in solving the challenging problem of maintaining privacy and supporting open access to network data to ensure reproducibility of existing studies and discovering new scientific insights that can be obtained by analysing such data ...


The Extension Class And Kms States For Cuntz-Pimsner Algebras Of Some Bi-Hilbertian Bimodules, Adam C. Rennie, David I. Robertson, Aidan Sims 2017 University of Wollongong

The Extension Class And Kms States For Cuntz-Pimsner Algebras Of Some Bi-Hilbertian Bimodules, Adam C. Rennie, David I. Robertson, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part A

For bi-Hilbertian A-bimodules, in the sense of Kajiwara-Pinzari-Watatani, we construct a Kasparov module representing the extension class defining the Cuntz-Pimsner algebra. The construction utilises a singular expectation which is defined using the C*-module version of the Jones index for bi-Hilbertian bimodules. The Jones index data also determines a novel quasi-free dynamics and KMS states on these Cuntz-Pimsner algebras.


Stacking Fault Tetrahedron Induced Plasticity In Copper Single Crystal, Liang Zhang, Cheng Lu, Anh Kiet Tieu, Lihong Su, Xing Zhao, Linqing Pei 2017 University of Wollongong

Stacking Fault Tetrahedron Induced Plasticity In Copper Single Crystal, Liang Zhang, Cheng Lu, Anh Kiet Tieu, Lihong Su, Xing Zhao, Linqing Pei

Faculty of Engineering and Information Sciences - Papers: Part A

Stacking fault tetrahedron (SFT) is the most common type of vacancy clustered defects in fcc metals and alloys, and can play an important role in the mechanical properties of metallic materials. In this study, molecular dynamics (MD) simulations were carried out to investigate the incipience of plasticity and the underlying atomic mechanisms in copper single crystals with SFT. Different deformation mechanisms of SFT were reported due to the crystal orientations and loading directions (compression and tension). The results showed that the incipient plasticity in crystals with SFT resulted from the heterogeneous dislocation nucleation from SFT, so the stress required for ...


Once Only Principle: Benefits, Barriers & Next Steps, Maria Wimmer, Efthimios Tambouris, Robert Krimmer, J Gil-Garcia, Akemi T. Chatfield 2017 University of Koblenz-Landau

Once Only Principle: Benefits, Barriers & Next Steps, Maria Wimmer, Efthimios Tambouris, Robert Krimmer, J Gil-Garcia, Akemi T. Chatfield

Faculty of Engineering and Information Sciences - Papers: Part B

The Once-Once Principle (OOP) suggests that citizens and businesses should have the right to supply information only once to a public administration. It would then be the responsibility of public administration offices to take all necessary actions in order to internally share this data by respecting the relevant data protection rules. The overall aim is to reduce administrative burden. The implementation of the OOP is high on the political agenda of many countries including the Member States of the European Union. The aim of this panel is to enable an open discussion between the panelists and the audience in order ...


An Experimental Study Of Axial Load Transfer Mechanisms Of Cable Bolts Using Axially Split Embedment Apparatus, Ali Mirza, Naj Aziz 2017 University of Wollongong

An Experimental Study Of Axial Load Transfer Mechanisms Of Cable Bolts Using Axially Split Embedment Apparatus, Ali Mirza, Naj Aziz

Faculty of Engineering and Information Sciences - Papers: Part B

The load transfer mechanisms of cable bolts differ from those for normal rebar bolts. The cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way they are laid. Tendon bolts (rebar and cable) are normally evaluated for their strength and load transfer properties. The tendon strength can be evaluated by the tensile failure tests, while the load transfer strength is evaluated by the pull and shear strength tests. Short Encapsulation Pull Testing (SEPT) is normally used to study the load transfer capacities of tendons, and it can ...


Equivalence And Stable Isomorphism Of Groupoids, And Diagonal-Preserving Stable Isomorphisms Of Graph C* -Algebras And Leavitt Path Algebras, Toke Meier Carlsen, Efren Ruiz, Aidan Sims 2017 University of the Faroe Islands

Equivalence And Stable Isomorphism Of Groupoids, And Diagonal-Preserving Stable Isomorphisms Of Graph C* -Algebras And Leavitt Path Algebras, Toke Meier Carlsen, Efren Ruiz, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part B

We prove that ample groupoids with sigma-compact unit spaces are equivalent if and only if they are stably isomorphic in an appropriate sense, and relate this to Matui's notion of Kakutani equivalence. We use this result to show that diagonal-preserving stable isomorphisms of graph C*-algebras or Leavitt path algebras give rise to isomorphisms of the groupoids of the associated stabilised graphs. We deduce that the Leavitt path algebras LZ(E_2) and LZ(E2-) are not stably *-isomorphic.


Fast Multi-Resource Allocation With Patterns In Large Scale Cloud Data Center, Jiyuan Shi, Junzhou Luo, Fang Dong, Jiahui Jin, Jun Shen 2017 Southeast University

Fast Multi-Resource Allocation With Patterns In Large Scale Cloud Data Center, Jiyuan Shi, Junzhou Luo, Fang Dong, Jiahui Jin, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.


Action Learning In Undergraduate Engineering Thesis Supervision, Brad Stappenbelt 2017 University of Wollongong

Action Learning In Undergraduate Engineering Thesis Supervision, Brad Stappenbelt

Faculty of Engineering and Information Sciences - Papers: Part B

In the present action learning implementation, twelve action learning sets were conducted over eight years. The action learning sets consisted of students involved in undergraduate engineering research thesis work. The concurrent study accompanying this initiative investigated the influence of the action learning environment on student approaches to learning and any accompanying academic, learning and personal benefits realised. The influence of preferred learning styles on set function and student adoption of the action learning process were also examined. The action learning environment implemented had a measurable significant positive effect on student academic performance, their ability to cope with the stresses associated ...


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 ...


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.


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