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6856 full-text articles. Page 7 of 256.

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 ...


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.


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 ...


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 ...


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 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.


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.


Investigations Into The Identification And Control Of Outburst Risk In Australian Underground Coal Mines, Dennis J. Black 2017 University of Wollongong, PacificMGM

Investigations Into The Identification And Control Of Outburst Risk In Australian Underground Coal Mines, Dennis J. Black

Faculty of Engineering and Information Sciences - Papers: Part B

Australian coal mines currently use gas content to assess outburst risk. The gas content threshold values for each mine are indirectly determined from measurement of gas volume liberated from 150g coal samples during Q 3 residual gas content testing. It has been more than twenty years since this method, known as desorption rate index (DRI), was presented to the Australian coal industry, and in that time, there have been significant changes in mining conditions and the outburst threshold limits used at the benchmark Bulli seam mines. NSW Regulations list matters to be considered in developing control measures to manage the ...


Undesorbable Residual Gas In Coal Seams And Its Influence On Gas Drainage, Gongda Wang, Ting X. Ren, Lang Zhang, Longyong Shu 2017 China Coal Research Institute, University of Wollongong

Undesorbable Residual Gas In Coal Seams And Its Influence On Gas Drainage, Gongda Wang, Ting X. Ren, Lang Zhang, Longyong Shu

Faculty of Engineering and Information Sciences - Papers: Part B

The definition of "residual gas" can be found in different scenarios, such as the "fast" and "slow" desorption methods of measuring gas content and the sorption hysteresis test and gas management of coal mines, however, its meaning varies a lot in different contexts. The main aim of this paper is to discuss the existence of truly undesorbable residual gas in coal seam conditions and its impacts on sorption model and gas drainage efficiency. We believe the undesorbable residual gas does exist due to the observation of the extended slow desorption test and the sorption hysteresis test. The origin of undesorbable ...


Stress State Monitoring In The Surroundings Of The Roadway Ahead Of Longwall Mining, Petr Waclawik, Radovan Kukutsch, Petr Konicek, Jiri Ptacek, Vlastimil Kajzar, Jan Nemcik, Lubomir Stas, Kamil Soucek, Martin Vavro 2017 Institute Of Clean Technologies, Institute of Geonics of CAS

Stress State Monitoring In The Surroundings Of The Roadway Ahead Of Longwall Mining, Petr Waclawik, Radovan Kukutsch, Petr Konicek, Jiri Ptacek, Vlastimil Kajzar, Jan Nemcik, Lubomir Stas, Kamil Soucek, Martin Vavro

Faculty of Engineering and Information Sciences - Papers: Part B

Accurate knowledge of the stress-strain state of rock mass, not only in their vicinity but also in the wide surroundings of mine workings, is absolutely critical for precise support designing. Investigation of the rock stress is usually carried out by interpretation of the rock mass deformation processes, which can be relatively precisely observed and measured. In order to verify the stress state of the rock mass and changes in it induced by longwall mining, monitoring of changes in the rock mass stress in connection with the mine out of the longwall No. 371 202 was carried out. The seam extracted ...


Ethics And Brain Implants In The Military [Commentary], Marcus R. Wigan 2017 University of Wollongong

Ethics And Brain Implants In The Military [Commentary], Marcus R. Wigan

Faculty of Engineering and Information Sciences - Papers: Part B

Definitions are a key factor when discussing the ethics of brain implants in the military. There is a world of difference between a permanent embedded rewritable chip and an active RFID-managed interface to a nervous system.


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