Open Access. Powered by Scholars. Published by Universities.®

Science and Technology Studies Commons

Open Access. Powered by Scholars. Published by Universities.®

6175 Full-Text Articles 7467 Authors 1472327 Downloads 135 Institutions

All Articles in Science and Technology Studies

Faceted Search

6175 full-text articles. Page 4 of 224.

Effect Of Scattered Electrons On The 'Magic Plate' Transmission Array Detector Response, Z A. Alrowaili, Michael L. F Lerch, Marco Petasecca, Martin G. Carolan, Anatoly B. Rosenfeld 2017 University of Wollongong

Effect Of Scattered Electrons On The 'Magic Plate' Transmission Array Detector Response, Z A. Alrowaili, Michael L. F Lerch, Marco Petasecca, Martin G. Carolan, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

Transmission type detectors can provide a measure of the energy fluence and if they are real-time systems that do not significantly attenuate the radiation beam have a distinct advantage over the current method as Quality Assurance (QA) could in principle be done during the actual patient treatment. The use of diode arrays in QA holds much promise due to real-time operation and feedback when compared to other methods e.g. films which are not real-time. The goal of this work is to describe the characterization of the radiation response of a silicon diode array called the Magic Plate (MP) when ...


Innovative Detectors For Quality Assurance Dosimetry In Sbrt Of Stationary And Movable Targets, Matthew Newall, Marco Petasecca, Mitchell Duncan, Iolanda Fuduli, Khalsa Al shukaili, Jeremy T. Booth, Paul J. Keall, Stephanie Corde, V Pereveratylo, Michael L. F Lerch, Anatoly B. Rosenfeld 2017 University of Wollongong

Innovative Detectors For Quality Assurance Dosimetry In Sbrt Of Stationary And Movable Targets, Matthew Newall, Marco Petasecca, Mitchell Duncan, Iolanda Fuduli, Khalsa Al Shukaili, Jeremy T. Booth, Paul J. Keall, Stephanie Corde, V Pereveratylo, Michael L. F Lerch, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

The high spatial and temporal resolution 2D monolithic silicon detector arrays M512 and DUO for quality assurance (QA) in real time motion adaptive radiotherapy (ART) have been developed. The DUO array possesses a spatial resolution of 0.2 mm and has demonstrated agreement within 5% with EBT3 film measurements of 6MV linac beam profiles for field sizes 1 × 1 cm2 and SRS cone diameter 0.5 cm. Dynamic characterisation of the M512 for QA in real time ART evaluated the performance of M512 for small fields while the detector experiences periodic motion. It was demonstrated with M512 that MLC ...


High-Throughput Sheathless And Three-Dimensional Microparticle Focusing Using A Microchannel With Arc-Shaped Groove Arrays, Qianbin Zhao, Jun Zhang, Sheng Yan, Dan Yuan, Haiping Du, Gursel Alici, Weihua Li 2017 University of Wollongong

High-Throughput Sheathless And Three-Dimensional Microparticle Focusing Using A Microchannel With Arc-Shaped Groove Arrays, Qianbin Zhao, Jun Zhang, Sheng Yan, Dan Yuan, Haiping Du, Gursel Alici, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

Sheathless particle focusing which utilises the secondary flow with a high throughput has great potential for use in microfluidic applications. In this work, an innovative particle focusing method was proposed. This method makes use of a mechanism that takes advantage of secondary flow and inertial migration. The device was a straight channel with arrays of arc-shaped grooves on the top surface. First, the mechanism and expected focusing phenomenon are explained using numerical simulation of the flow field and force balance. A simulation of particle trajectories was conducted as a reference, and then a series of experiments was designed and the ...


Quantum Beam Science-Applications To Probe Or Influence Matter And Materials, Klaus-Dieter Liss 2017 University of Wollongong

Quantum Beam Science-Applications To Probe Or Influence Matter And Materials, Klaus-Dieter Liss

Faculty of Engineering and Information Sciences - Papers: Part A

The concept of quantum beams unifies a multitude of different kinds of radiation that can be considered as both waves and particles, according to the quantum mechanical model. Examples include light, in the form of X-rays and synchrotron radiation, as well as neutrons, electrons, positrons, muons, protons, ions, and photons. While the past century saw the discovery of these types of radiation and particles along with the investigations of their physical properties and their fundamental interaction with matter, the current century focuses extensively on their applications to characterize and understand materials in their broadest context, under all imaginable conditions. X-rays ...


Effective Long Term Travel Time Prediction With Fuzzy Rules For Tollway, Ruimin Li, Geoffrey Rose, Huaming Chen, Jun Shen 2017 Transport for NSW

Effective Long Term Travel Time Prediction With Fuzzy Rules For Tollway, Ruimin Li, Geoffrey Rose, Huaming Chen, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Membership Function Based Matching Approach Of Buyers And Sellers Through A Broker In Open E-Marketplace, Dien Tuan Le, Minjie Zhang, Fenghui Ren 2017 University of Wollongong

Membership Function Based Matching Approach Of Buyers And Sellers Through A Broker In Open E-Marketplace, Dien Tuan Le, Minjie Zhang, Fenghui Ren

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Rfid Ownership Transfer With Positive Secrecy Capacity Channels, Jorge Munilla Fajardo, Mike Burmester, Alberto Peinado, Guomin Yang, Willy Susilo 2017 Universidad de Malaga

Rfid Ownership Transfer With Positive Secrecy Capacity Channels, Jorge Munilla Fajardo, Mike Burmester, Alberto Peinado, Guomin Yang, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part A

RFID ownership transfer protocols (OTPs) transfer tag ownership rights. Recently, there has been considerable interest in such protocols, however, guaranteeing privacy for symmetric-key settings without trusted third parties (TTPs) is a challenge still unresolved. In this paper, we address this issue and show that it can be solved by using channels with positive secrecy capacity. We implement these channels with noisy tags and provide practical values, thus proving that perfect secrecy is theoretically possible. We then define a communication model that captures spatiotemporal events and describe a first example of symmetric-key based OTP that: (i) is formally secure in the ...


Simulation Ballasted Track Behavior: Numerical Treatment And Field Application, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn 2017 University of Wollongong

Simulation Ballasted Track Behavior: Numerical Treatment And Field Application, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part A

The load deformation of ballasted rail tracks subjected to cyclic loading is investigated experimentally using a large-scale track process simulation apparatus and numerically through a combined discrete element-finite-difference approach. Laboratory tests were performed to examine the deformation and degradation of ballast subjected to cyclic loading at 15 Hz and a lateral confinement of 10 kPa 10 kPa. The laboratory results reveal that ballast undergoes significant deformation during the initial load cycles, followed by gradually increasing deformation attaining a steady value toward the end of testing. A numerical model based on a combined discrete element method (DEM) and finite-difference method (FDM ...


A Framework To Assess Newmark-Type Simplified Methods For Evaluation Of Earthquake-Induced Deformation Of Embankments, Mojtaba E. Kan, Hossein Taiebat, Mahdi Taiebat 2017 University of Wollongong

A Framework To Assess Newmark-Type Simplified Methods For Evaluation Of Earthquake-Induced Deformation Of Embankments, Mojtaba E. Kan, Hossein Taiebat, Mahdi Taiebat

Faculty of Engineering and Information Sciences - Papers: Part A

The simplified procedures for evaluation of the earthquake induced displacement in earth and rockfill dams are widely used in practice. These methods are simple, inexpensive, and substantially less time consuming as compared to the complicated stress-deformation approaches. They are especially recommended to be used as a screening tool, to identify embankments with marginal factor of safety, assuming that these methods always give conservative estimates of settlements. However recent studies show that application of these methods may not be conservative in some cases, especially when the tuning ratio of a dam is within a certain range. In this paper the fundamental ...


Osmotic Versus Conventional Membrane Bioreactors Integrated With Reverse Osmosis For Water Reuse: Biological Stability, Membrane Fouling, And Contaminant Removal, Wenhai Luo, Hop Phan, Ming Xie, Faisal I. Hai, William E. Price, Menachem Elimelech, Long D. Nghiem 2017 University of Wollongong

Osmotic Versus Conventional Membrane Bioreactors Integrated With Reverse Osmosis For Water Reuse: Biological Stability, Membrane Fouling, And Contaminant Removal, Wenhai Luo, Hop Phan, Ming Xie, Faisal I. Hai, William E. Price, Menachem Elimelech, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

This study systematically compares the performance of osmotic membrane bioreactor - reverse osmosis (OMBR-RO) and conventional membrane bioreactor - reverse osmosis (MBR-RO) for advanced wastewater treatment and water reuse. Both systems achieved effective removal of bulk organic matter and nutrients, and almost complete removal of all 31 trace organic contaminants investigated. They both could produce high quality water suitable for recycling applications. During OMBR-RO operation, salinity build-up in the bioreactor reduced the water flux and negatively impacted the system biological treatment by altering biomass characteristics and microbial community structure. In addition, the elevated salinity also increased soluble microbial products and extracellular polymeric ...


Vibration-Induced Aerodynamic Loads On Large Horizontal Axis Wind Turbine Blades, Xiong Liu, Cheng Lu, Shi Liang, Ajit R. Godbole, Yan Chen 2017 University of Wollongong

Vibration-Induced Aerodynamic Loads On Large Horizontal Axis Wind Turbine Blades, Xiong Liu, Cheng Lu, Shi Liang, Ajit R. Godbole, Yan Chen

Faculty of Engineering and Information Sciences - Papers: Part A

The blades of a large Horizontal Axis Wind Turbine (HAWT) are subjected to significant vibrations during operation. The vibrations affect the dynamic flow field around the blade and consequently alter the aerodynamic forces on the blade. In order to better understand the influence of blade vibrations on the aerodynamic loads, the dynamic stall characteristics of an S809 airfoil undergoing translational motion as well as pitching motion were investigated using Computational Fluid Dynamics (CFD) techniques. Simulation results indicated that both the out-of-plane and in-plane translational motions of the airfoil affect the unsteady aerodynamic forces significantly. In order to investigate the effects ...


Dynamic Exergy Analysis For The Thermal Storage Optimization Of The Building Envelope, Valentina Bonetti, Georgios Kokogiannakis 2017 University of Strathclyde

Dynamic Exergy Analysis For The Thermal Storage Optimization Of The Building Envelope, Valentina Bonetti, Georgios Kokogiannakis

Faculty of Engineering and Information Sciences - Papers: Part A

As a measure of energy "quality", exergy is meaningful for comparing the potential for thermal storage. Systems containing the same amount of energy could have considerably different capabilities in matching a demand profile, and exergy measures this difference. Exergy stored in the envelope of buildings is central in sustainability because the environment could be an unlimited source of energy if its interaction with the envelope is optimised for maintaining the indoor conditions within comfort ranges. Since the occurring phenomena are highly fluctuating, a dynamic exergy analysis is required; however, dynamic exergy modelling is complex and has not hitherto been implemented ...


Blind Adaptive Multi-User Detection For Under-Ice Acoustic Communications With Mobile Interfering Users, Jingwei Yin, Guang Yang, Defeng (David) Huang, Lu Jin, Qinghua Guo 2017 Harbin Engineering University

Blind Adaptive Multi-User Detection For Under-Ice Acoustic Communications With Mobile Interfering Users, Jingwei Yin, Guang Yang, Defeng (David) Huang, Lu Jin, Qinghua Guo

Faculty of Engineering and Information Sciences - Papers: Part A

The Least Mean Squares Blind Adaptive Multi-user Detection algorithm, the Recursive Least Squares Blind Adaptive Multi-user Detection algorithm, and the Kalman Filter Blind Adaptive Multi-user Detection algorithm, for under-ice communication networks with rising and diving interfering users, are investigated in this paper. Under-ice random asynchronous multi-user communication experiments with rising and diving interfering users were carried out (7 users, 15.7 bit/s per user, 1.2 km under-ice acoustic channels in the Bohai Sea). Good experimental results verified the feasibility and effectiveness of the proposed algorithms in mitigating inter-symbol interference and multiple access interference.


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 NTNU, Trondheim, Norway, 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 A

We prove that ample groupoids with σ-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(E2) and LZ(E2-) are not stably *-isomorphic.


Parallel Gpu-Based Collision Detection Of Irregular Vessel Wall For Massive Particles, Binbin Yong, Jun Shen, Hongyu Sun, Huaming Chen, Qingguo Zhou 2017 Lanzhou University

Parallel Gpu-Based Collision Detection Of Irregular Vessel Wall For Massive Particles, Binbin Yong, Jun Shen, Hongyu Sun, Huaming Chen, Qingguo Zhou

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, we present a novel GPU-based limit space decomposition collision detection algorithm (LSDCD) for performing collision detection between a massive number of particles and irregular objects, which is used in the design of the ADS (Accelerator Driven Sub-Critical) system. Test results indicate that, the collisions between ten million particles and the vessel can be detected on a general personal computer in only 0.5 second per frame. With this algorithm, the collision detection of maximum sixty million particles are calculated in 3.488030 seconds. Experiment results show that our algorithm is promising for fast collision detection.


Barriers To Predictive Analytics Use For Policy Decision-Making Effectiveness In Turbulent Times: A Case Study Of Fukushima Nuclear Accident, Akemi T. Chatfield, Christopher Reddick 2017 University of Wollongong

Barriers To Predictive Analytics Use For Policy Decision-Making Effectiveness In Turbulent Times: A Case Study Of Fukushima Nuclear Accident, Akemi T. Chatfield, Christopher Reddick

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


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 ...


Digital Commons powered by bepress