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Full-Text Articles in Social and Behavioral Sciences

Decompression Wave Speed In Co2 Mixtures: Cfd Modelling With The Gerg-2008 Equation Of State, Alhoush Elshahomi, Cheng Lu, Guillaume Michal, Xiong Liu, Ajit R. Godbole, Phillip Venton Dec 2014

Decompression Wave Speed In Co2 Mixtures: Cfd Modelling With The Gerg-2008 Equation Of State, Alhoush Elshahomi, Cheng Lu, Guillaume Michal, Xiong Liu, Ajit R. Godbole, Phillip Venton

Faculty of Engineering and Information Sciences - Papers: Part A

The development of CO2 pipelines for Carbon Capture and Storage (CCS) raises new questions regarding the control of ductile fracture propagation and fracture arrest toughness criteria. The decompression behaviour in the fluid must be determined accurately in order to estimate the proper pipe toughness. However, anthropogenic CO2 may contain impurities that can modify the fluid decompression characteristics quite significantly. To determine the decompression wave speed in CO2 mixtures, the thermodynamic properties of these mixtures must be determined by using an accurate equation of state. In this paper we present a new decompression model developed using the Computational Fluid Dynamics (CFD ...


Ion Radiography As A Tool For Patient Set-Up & Image Guided Particle Therapy: A Monte Carlo Study, Nicolas Depauw, Marta F. Dias, Anatoly B. Rosenfeld, Joao C. Seco Feb 2014

Ion Radiography As A Tool For Patient Set-Up & Image Guided Particle Therapy: A Monte Carlo Study, Nicolas Depauw, Marta F. Dias, Anatoly B. Rosenfeld, Joao C. Seco

Faculty of Engineering and Information Sciences - Papers: Part A

This study investigate the use of ion radiography as a tool for patient set-up and tumor tracking capabilities for image guided particle therapy (IGPT) using Monte Carlo simulations. One pediatric, two lung and one liver cancer patients were considered in this study. For each patient, 230 and 330 MeV proton, and 500 MeV/nucleon carbon ion pencil beams were simulated through their computed tomography (CT) data set using GEANT4.9.0. Energy, position and direction cosines of each particle were recorded in front and behind the patient. Ion radiographs were subsequently reconstructed using a dedicated in-house software. The image quality ...


Ppdcp-Abe: Privacy-Preserving Decentralized Ciphertext-Policy Attribute-Based Encryption, Jinguang Han, Willy Susilo, Yi Mu, Jianying Zhou, Man Ho Au Jan 2014

Ppdcp-Abe: Privacy-Preserving Decentralized Ciphertext-Policy Attribute-Based Encryption, Jinguang Han, Willy Susilo, Yi Mu, Jianying Zhou, Man Ho Au

Faculty of Engineering and Information Sciences - Papers: Part A

Cipher-policy attribute-based encryption (CP-ABE) is a more efficient and flexible encryption system as the encryptor can control the access structure when encrypting a message. In this paper, we propose a privacy-preserving decentralized CP-ABE (PPDCP-ABE) scheme where the central authority is not required, namely each authority can work independently without the cooperation to initialize the system. Meanwhile, a user can obtain secret keys from multiple authorities without releasing his global identifier (GID) and attributes to them. This is contrasted to the previous privacy-preserving multi-authority ABE (PPMA-ABE) schemes where a user can obtain secret keys from multiple authorities with them knowing his ...


Economic-Emission Dispatch Problem: A Semi-Definite Programming Approach, A M. Jubril, O A. Olaniyan, O A. Komolafe, Philip O. Ogunbona Jan 2014

Economic-Emission Dispatch Problem: A Semi-Definite Programming Approach, A M. Jubril, O A. Olaniyan, O A. Komolafe, Philip O. Ogunbona

Faculty of Engineering and Information Sciences - Papers: Part A

A semi-definite programming (SDP) formulation of the multi-objective economic-emission dispatch problem is presented. The fuel cost and emission functions are represented by high order polynomial functions and this was shown to be a more accurate representation of the economic-emission dispatch (EED) problem. Furthermore, the polynomial functions of both objective functions are aggregated into a single objective function using the weighted sum approach. This thus reduces the problem to a standard polynomial optimization problem which was formulated as a hierarchy of semi-definite relaxation problems. The resulting SDP problem was then solved at different degrees of approximation. The performance of the proposed ...


New Insight To Preserve Online Survey Accuracy And Privacy In Big Data Era, Joseph K. Liu, Man Ho Au, Xinyi Huang, Willy Susilo, Jianying Zhou, Yong Yu Jan 2014

New Insight To Preserve Online Survey Accuracy And Privacy In Big Data Era, Joseph K. Liu, Man Ho Au, Xinyi Huang, Willy Susilo, Jianying Zhou, Yong Yu

Faculty of Engineering and Information Sciences - Papers: Part A

An online survey system provides a convenient way for people to conduct surveys. It removes the necessity of human resources to hold paper surveys or telephone interviews and hence reduces the cost significantly. Nevertheless, accuracy and privacy remain as the major obstacles that need additional attention. To conduct an accurate survey, privacy maybe lost, and vice versa. In this paper, we provide new insight to preserve these two seeming contradictory issues in online survey systems especially suitable in big data era. We propose a secure system, which is shown to be efficient and practical by simulation data. Our analysis further ...


Efficient Hidden Vector Encryption With Constant-Size Ciphertext, Phuong Viet Xuan Tran, Guomin Yang, Willy Susilo Jan 2014

Efficient Hidden Vector Encryption With Constant-Size Ciphertext, Phuong Viet Xuan Tran, Guomin Yang, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part A

A Hidden Vector Encryption (HVE) scheme is a special type of anonymous identity-based encryption (IBE) scheme where the attribute string associated with the ciphertext or the user secret key can contain wildcards. In this paper, we introduce two constant-size ciphertext-policy hidden vector encryption (CP-HVE) schemes. Our first scheme is constructed on composite order bilinear groups, while the second one is built on prime order bilinear groups. Both schemes are proven secure in a selective security model which captures plaintext (or payload) and attribute hiding. To the best of our knowledge, our schemes are the first HVE constructions that can achieve ...


Optimistic Fair Exchange In The Enhanced Chosen-Key Model, Yang Wang, Man Ho Au, Willy Susilo Jan 2014

Optimistic Fair Exchange In The Enhanced Chosen-Key Model, Yang Wang, Man Ho Au, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part A

Optimistic fair exchange (OFE) is a kind of protocol to guarantee fairness for the parties involved in an exchange with the help of an arbitrator. A fundamental work of optimistic fair exchange is to define security models capturing realistic attacks and design schemes secure in practical models. The security models are very essential to ensure that they capture practical situation, which will ensure that the protocols can be adopted in practice. The contributions of this paper are three fold. First, we observe that the existing OFE models do not capture realistic situation, where the adversary can actually observe the full ...


Stress Prediction Model For Frp Confined Rectangular Concrete Columns With Rounded Corners, Thong M. Pham, Muhammad N. S Hadi Jan 2014

Stress Prediction Model For Frp Confined Rectangular Concrete Columns With Rounded Corners, Thong M. Pham, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part A

The paper uses the membrane hypothesis to formulate the confining behavior of fiber-reinforced polymer (FRP) confined rectangular columns. A model was developed to calculate the strength of FRP confined rectangular concrete columns. The model was verified using a database of 190 FRP confined rectangular concrete columns. The database covers unconfined concrete strength between 18.3 and 55.2 MPa, and specimens with dimensions ranging from 79-305 mm and 100-305 mm for short and long sides, respectively. The performance of the proposed model shows a very good correlation with the experimental results. In addition, the strain distribution of FRP around the ...


Removal Of Dissolved Organics From Produced Water By Forward Osmosis, Rajab M. Abousnina, Long D. Nghiem Jan 2014

Removal Of Dissolved Organics From Produced Water By Forward Osmosis, Rajab M. Abousnina, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

This study investigated the performance of the forward osmosis (FO) process for treating produced water. Water permeate flux and reverse salt flux (RSF) were examined at different feed pH values and operating configurations (i.e. FO, pressure retarded osmosis (PRO), and reverse osmosis (RO) modes). Acetic acid was selected as a model organic acid to present the dissolved organic fraction in produced water. Results reported here indicate that only membranes specifically designed for FO applications can be used in the FO and PRO modes. Due to the internal concentration polarization phenomenon, the PRO mode resulted in a higher water permeate ...


The Effects Of Mediator And Granular Activated Carbon Addition On Degradation Of Trace Organic Contaminants By An Enzymatic Membrane Reactor, Luong N. Nguyen, Faisal I. Hai, William E. Price, Frederic Leusch, Felicity Roddick, Hao H. Ngo, Wenshan Guo, Saleh Faraj Magram, Long D. Nghiem Jan 2014

The Effects Of Mediator And Granular Activated Carbon Addition On Degradation Of Trace Organic Contaminants By An Enzymatic Membrane Reactor, Luong N. Nguyen, Faisal I. Hai, William E. Price, Frederic Leusch, Felicity Roddick, Hao H. Ngo, Wenshan Guo, Saleh Faraj Magram, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

The removal of four recalcitrant trace organic contaminants (TrOCs), namely carbamazepine, diclofenac, sulfamethoxazole and atrazine by laccase in an enzymatic membrane reactor (EMR) was studied. Laccases are not effective for degrading non-phenolic compounds; nevertheless, 22-55% removal of these four TrOCs was achieved by the laccase EMR. Addition of the redox-mediator syringaldehyde (SA) to the EMR resulted in a notable dose-dependent improvement (15-45%) of TrOC removal affected by inherent TrOC properties and loading rates. However, SA addition resulted in a concomitant increase in the toxicity of the treated effluent. A further 14-25% improvement in aqueous phase removal of the TrOCs was ...


Effect Of Stress State On Deformation And Fracture Of Nanocrystalline Copper: Molecular Dynamics Simulation, Liang Zhang, Cheng Lu, A Kiet Tieu, Linqing Pei, Xing Zhao Jan 2014

Effect Of Stress State On Deformation And Fracture Of Nanocrystalline Copper: Molecular Dynamics Simulation, Liang Zhang, Cheng Lu, A Kiet Tieu, Linqing Pei, Xing Zhao

Faculty of Engineering and Information Sciences - Papers: Part A

Deformation in a microcomponent is often constrained by surrounding joined material making the component under mixed loading and multiple stress states. In this study, molecular dynamics (MD) simulation are conducted to probe the effect of stress states on the deformation and fracture of nanocrystalline Cu. Tensile strain is applied on a Cu single crystal, bicrystal and polycrystal respectively, under two different tension boundary conditions. Simulations are first conducted on the bicrystal and polycrystal models without lattice imperfection. The results reveal that, compared with the performance of simulation models under free boundary condition, the transverse stress caused by the constrained boundary ...


Real-Time Control Of Inertial Focusing In Microfluidics Using Dielectrophoresis (Dep), Jun Zhang, Sheng Yan, Gursel Alici, Nam-Trung Nguyen, Dino Di Carlo, Weihua Li Jan 2014

Real-Time Control Of Inertial Focusing In Microfluidics Using Dielectrophoresis (Dep), Jun Zhang, Sheng Yan, Gursel Alici, Nam-Trung Nguyen, Dino Di Carlo, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, we propose a novel hybrid microfluidic device, for the first time, which integrates and fully couples both dielectrophoresis (DEP) and inertial focusing. A DEP force is coupled with inertial lift force to adjust particle's equilibrium position in the vertical direction in real time. The focusing pattern and position of the particles along the horizontal plane can be concurrently adjusted by adjusting their vertical position with DEP forces. The magnitude of secondary flow drag dramatically increases when particles are levitated towards the centre of the channel in the vertical direction. The paper analytically and experimentally investigates the ...


Removal Of Pathogens By Membrane Bioreactors: A Review Of The Mechanisms, Influencing Factors And Reduction In Chemical Disinfectant Dosing, Faisal I. Hai, Thomas Riley, Samia Shawkat, Saleh Faraj Magram, Kazuo Yamamoto Jan 2014

Removal Of Pathogens By Membrane Bioreactors: A Review Of The Mechanisms, Influencing Factors And Reduction In Chemical Disinfectant Dosing, Faisal I. Hai, Thomas Riley, Samia Shawkat, Saleh Faraj Magram, Kazuo Yamamoto

Faculty of Engineering and Information Sciences - Papers: Part A

The continued depletion of fresh drinking water resources throughout the world has increased the need for a variety of water treatment and recycling strategies. Conventional wastewater treatment processes rely on extensive chemical post-disinfection to comply with the stringent microbiological safety for water reuse. When well designed and operated, membrane bioreactors (MBRs) can consistently achieve efficient removals of suspended solids, protozoa and coliform bacteria. Under optimal conditions, MBR systems can also significantly remove various viruses and phages. This paper provides an in-depth overview of the mechanisms and influencing factors of pathogen removal by MBR and highlights practical issues, such as reduced ...


A Novel Type Of One-Dimensional Organic Selenium-Containing Fiber With Superior Performance For Lithium-Selenium And Sodium-Selenium Batteries, Hongqiang Wang, Sha Li, Zhixin Chen, Hua-Kun Liu, Zaiping Guo Jan 2014

A Novel Type Of One-Dimensional Organic Selenium-Containing Fiber With Superior Performance For Lithium-Selenium And Sodium-Selenium Batteries, Hongqiang Wang, Sha Li, Zhixin Chen, Hua-Kun Liu, Zaiping Guo

Faculty of Engineering and Information Sciences - Papers: Part A

A novel type of organic selenide fiber composed of carbonized polyacrylonitrile/selenium (CPAN/Se) has been synthesized by heating polyacrylonitrile-selenium (PAN-Se) fibers via the electrospinning technique at 600°C. The Se molecules are confined by N-containing carbon ring structures in the form of energy-storing selenium side chains in the carbonized PAN matrix. This unique stable chemical structure with a conductive carbon skeleton connected to the selenium side chains and excellent mechanical stability can allow CPAN/Se composite cathodes to be charged and discharged in a low-cost carbonate-based electrolyte with excellent long cycle stability and quite good rate performance. The superior ...


Large-Area Binary Blazed Grating Coupler Between Nanophotonic Waveguide And Led, Hongqiang Li, Wenqian Zhou, Meiling Zhang, Yu Liu, Cheng Zhang, Enbang Li, Changyun Miao, Chunxiao Tang Jan 2014

Large-Area Binary Blazed Grating Coupler Between Nanophotonic Waveguide And Led, Hongqiang Li, Wenqian Zhou, Meiling Zhang, Yu Liu, Cheng Zhang, Enbang Li, Changyun Miao, Chunxiao Tang

Faculty of Engineering and Information Sciences - Papers: Part A

A large-area binary blazed grating coupler for the arrayed waveguide grating (AWG) demodulation integrated microsystem on silicon-on-insulator (SOI) was designed for the first time. Through the coupler, light can be coupled into the SOI waveguide from the InP-based C-band LED for the AWG demodulation integrated microsystem to function. Both the length and width of the grating coupler are 360 mu m, as large as the InP-based C-band LED light emitting area in the system. The coupler was designed and optimized based on the finite difference time domain method. When the incident angle of the light source is 0 degrees, the ...


Erosion Mitigation Of Lignosulfonate Treated Unstable Soils, Buddhima Indraratna, Rasika Manori Athukorala, J S Vinod Jan 2014

Erosion Mitigation Of Lignosulfonate Treated Unstable Soils, Buddhima Indraratna, Rasika Manori Athukorala, J S Vinod

Faculty of Engineering and Information Sciences - Papers: Part A

Highly unstable soils are common in many parts of the world. In recent years, traditional chemical admixtures such as cement, lime and fly ash were used for stabilising these soils. However, not all chemical stabilisers are readily acceptable due to stringent occupational health and safety issues and invariable change of soil pH that often limits the scope of vegetation plus imposing a threat to ground water pollution. However, recent research shows that lignosulfonate, an environmentally sustainable admixture, can stabilise unstable and erodible soils without causing adverse effects on the environment. This paper presents the results of a laboratory investigation and ...


Effects Of Hypochlorite Exposure On Morphology And Trace Organic Contaminant Rejection By Nf/Ro Membranes, Alexander R. Simon, Long D. Nghiem Jan 2014

Effects Of Hypochlorite Exposure On Morphology And Trace Organic Contaminant Rejection By Nf/Ro Membranes, Alexander R. Simon, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

The impacts of membrane degradation due to chlorine attack on the rejection of inorganic salts and trace organic contaminants by nanofiltration (NF) and reverse osmosis (RO) membranes were investigated in this study. The rejection of trace contaminants was examined at environmentally relevant concentrations. Changes in the membrane surface morphology were observed as a result of chlorine exposure. A small increase in rejection was consistently observed with all four membranes selected in this study after being exposed to a low concentration of hypochlorite (100 ppm). In contrast, a higher concentration of hypochlorite (i.e., 2000 ppm) could be detrimental to the ...


Evaluation Of The Coal Wash And Steel Furnace Slag Blends As Effective Reclamation Fill For Port Expansion, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Gabriele Chiaro, S.M.Ali Tasalloti Jan 2014

Evaluation Of The Coal Wash And Steel Furnace Slag Blends As Effective Reclamation Fill For Port Expansion, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Gabriele Chiaro, S.M.Ali Tasalloti

Faculty of Engineering and Information Sciences - Papers: Part A

Coal wash (CW) and steel furnace slag (SFS) are granular waste by-products that result from the operation of the coal mining and the steel industries, respectively. Their effective reuse and recycling as fill materials for earthwork construction, embankments and/or structural fill materials in port expansion projects, is economically attractive and environmentally sustainable because it lessens the need for disposal and sourcing of materials from local quarries. As the need for blending these materials arises from their individual adverse geotechnical characteristics, i.e. swelling and breakage behaviour in SFS and CW, it is important to evaluate the suitability of different ...


A Novel Hydro-Geochemical Model For Treating Acidic Groundwater Utilizing A Permeable Reactive Barrier, Punyama Udeshini Pathirage, Buddhima Indraratna, Laura Banasiak Jan 2014

A Novel Hydro-Geochemical Model For Treating Acidic Groundwater Utilizing A Permeable Reactive Barrier, Punyama Udeshini Pathirage, Buddhima Indraratna, Laura Banasiak

Faculty of Engineering and Information Sciences - Papers: Part A

Acidic groundwater generation from acid sulfate soil is a severe environmental and socio-economic problem in coastal Australia. A novel permeable reactive barrier (PRB) utilising recycled concrete aggregates as the reactive media was installed in the Shoalhaven Floodplain, south of Wollongong in Australia. The performance of the PRB has been monitored to study the acid neutralisation behaviour of recycled concrete and its potential to remove high concentrations of Al and Fe, which are threatening to living habitat. This study aims to couple geochemistry with geo-hydraulics in the remediation of acidic groundwater generated in acid sulfate soil terrain, which has not been ...


Improvement Of Soil Stability Along Rail Corridors Through Native Vegetation, Buddhima Indraratna, Muditha Pallewattha, Behzad Fatahi, Punyama Udeshini Pathirage Jan 2014

Improvement Of Soil Stability Along Rail Corridors Through Native Vegetation, Buddhima Indraratna, Muditha Pallewattha, Behzad Fatahi, Punyama Udeshini Pathirage

Faculty of Engineering and Information Sciences - Papers: Part A

Field studies conducted along the railway lines in Australia have revealed the ability to implement the green corridor concept as a soil stabilization method. Native trees grown along rail corridors are capable of increasing the matric suction of the subgrade soil underneath the track substructure via root water uptake, in conjunction with the tree canopy evapo-transpiration. Moreover, these trees are capable of providing significant mechanical reinforcement through the anchoring effect provided by the root network plus the additional cohesive increment due to hair roots generating osmotic suction. Much of the previous research carried out to quantify the mechanical strength generated ...


Efeito Da Granulometria Na Deformação E Quebra De Lastro Ferroviário, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Buddhima Indraratna, Michele Dal Toe Casagrande Jan 2014

Efeito Da Granulometria Na Deformação E Quebra De Lastro Ferroviário, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Buddhima Indraratna, Michele Dal Toe Casagrande

Faculty of Engineering and Information Sciences - Papers: Part A

O efeito da granulometria no comportamento mecânico do lastro tem sido estudado por vários pesquisadores no passado. A revisão de estes estudos indicaram que uma gradação mais uniforme que as atualmente usadas pela indústria ferroviária, diminuiria a deformação permanente e degradação do lastro ferroviário. Neste estudo, o equipamento prismoidal triaxial cíclico projetado e construído na Universidade de Wollongong foi utilizado. Duas granulometrias de lastro foram testadas sob tensão vertical cíclica máxima de 450 kPa. Os resultados mostraram que a granulometria teve grande influencia a deformação permanente e quebra de lastro ferroviário.


Requirements Elicitation And Specification Using The Agent Paradigm: The Case Study Of An Aircraft Turnaround Simulator, Tim Miller, Bin Lu, Leon Sterling, Ghassan Beydoun, Kuldar Taveter Jan 2014

Requirements Elicitation And Specification Using The Agent Paradigm: The Case Study Of An Aircraft Turnaround Simulator, Tim Miller, Bin Lu, Leon Sterling, Ghassan Beydoun, Kuldar Taveter

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, we describe research results arising from a technology transfer exercise on agent-oriented requirements engineering with an industry partner. We introduce two improvements to the state-of-the-art in agent-oriented requirements engineering, designed to mitigate two problems experienced by ourselves and our industry partner: (1) the lack of systematic methods for agent-oriented requirements elicitation and modelling; and (2) the lack of prescribed deliverables in agent-oriented requirements engineering. We discuss the application of our new approach to an aircraft turnaround simulator built in conjunction with our industry partner, and show how agent-oriented models can be derived and used to construct a ...


Magnetization Curves Of Sintered Heavy Tungsten Alloys For Applications In Mri-Guided Radiotherapy, Stefan Kolling, Bradley Oborn, Paul Keall, Josip Horvat Jan 2014

Magnetization Curves Of Sintered Heavy Tungsten Alloys For Applications In Mri-Guided Radiotherapy, Stefan Kolling, Bradley Oborn, Paul Keall, Josip Horvat

Faculty of Engineering and Information Sciences - Papers: Part A

Purpose: Due to the current interest in MRI-guided radiotherapy, the magnetic properties of the materials commonly used in radiotherapy are becoming increasingly important. In this paper, mea- surement results for the magnetization (BH) curves of a range of sintered heavy tungsten alloys used in radiation shielding and collimation are presented.

Methods: Sintered heavy tungsten alloys typically contain > 90% tungsten and < 10% of a combina- tion of iron, nickel, and copper binders. Samples of eight different grades of sintered heavy tungsten alloys with varying binder content were investigated. Using a superconducting quantum interference detector magnetometer, the induced magnetic moment m was measured for each sample as a function of applied external field H0and the BH curve derived.

Results: The iron content of the alloys was found to play a dominant role, directly influencing the magnetization M and thus the nonlinearity of the BH curve. Generally, the saturation magnetization increased with ...


Characteristics Of Oxide Scale Formed On Ferritic Stainless Steels In Simulated Reheating Atmosphere, Xiawei Cheng, Zhengyi Jiang, Dongbin Wei, Jingwei Zhao, Brian J. Monaghan, Raymond J. Longbottom, Laizhu Jiang Jan 2014

Characteristics Of Oxide Scale Formed On Ferritic Stainless Steels In Simulated Reheating Atmosphere, Xiawei Cheng, Zhengyi Jiang, Dongbin Wei, Jingwei Zhao, Brian J. Monaghan, Raymond J. Longbottom, Laizhu Jiang

Faculty of Engineering and Information Sciences - Papers: Part A

The aim of this study is to optimise the stainless steel oxidation behaviours during hot rolling. The high temperature oxidation behaviours of ferritic stainless steels B443NT and B445J1M were studied over the temperature range from 1000 to 1150 °C in a humid atmosphere containing 18% water vapour, as measured by a thermogravimetric analyser (TGA). The results indicate that breakaway oxidation occurs at 1090 °C for the B443NT steel, which is 60 °C lower than that for the B445J1M steel. The occurrence of iron oxide nodules on the steels marks the onset of breakaway oxidation; however, the breakaway oxidation phenomenon of ...


Exploiting Superior Tensile Properties Of A Novel Network-Structure Ala206 Matrix Composite By Hybridizing Micron-Sized Al3ti With Al2o3 Nano Particulates, S Tahamtan, A Halvaee, M Emamy, Z Y. Jiang, A Fadavi Boostani Jan 2014

Exploiting Superior Tensile Properties Of A Novel Network-Structure Ala206 Matrix Composite By Hybridizing Micron-Sized Al3ti With Al2o3 Nano Particulates, S Tahamtan, A Halvaee, M Emamy, Z Y. Jiang, A Fadavi Boostani

Faculty of Engineering and Information Sciences - Papers: Part A

In this study, semi-solid stir casting and ball milling processes are combined into an integrated composite fabrication process. Two different architectures were utilized to incorporate reinforcing particle into semi-solid alloy i.e., (i) ball milling of K2TiF6 and aluminum powder for 5h and subsequently with nano-alumina particles (Al2O3np) for 1h and (ii) ball milling of K2TiF6, Al2O3np and aluminum powder for 2h. Accordingly, the milled powders were incorporated into molten AlA206 alloy using a non-contact ultrasonic vibration method. The effect of milling procedure on microstructural evolution and tensile properties were then explored. Two different microstructures were characterized including well-distributed Al2O3np ...


Green Building Scheme Review Adds Yet More Policy Uncertainty, Daniel Daly, Paul Cooper Jan 2014

Green Building Scheme Review Adds Yet More Policy Uncertainty, Daniel Daly, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part A

Australia's policies to cut greenhouse emissions have been shrouded in uncertainty over the past few months. The contentious Renewable Energy Target review and the swapping of the carbon price for Direct Action have garnered most of the headlines. But another policy, which has quietly been cutting emissions for the past four years, is now also under scrutiny.


A State-Of-The-Art Review On Magnetorheological Elastomer Devices, Yancheng Li, Jianchun Li, Weihua Li, Haiping Du Jan 2014

A State-Of-The-Art Review On Magnetorheological Elastomer Devices, Yancheng Li, Jianchun Li, Weihua Li, Haiping Du

Faculty of Engineering and Information Sciences - Papers: Part A

During the last few decades, magnetorheological (MR) elastomers have attracted a significant amount of attention for their enormous potential in engineering applications. Because they are a solid counterpart to MR fluids, MR elastomers exhibit a unique field-dependent material property when exposed to a magnetic field, and they overcome major issues faced in magnetorheological fluids, e.g. the deposition of iron particles, sealing problems and environmental contamination. Such advantages offer great potential for designing intelligent devices to be used in various engineering fields, especially in fields that involve vibration reduction and isolation. This paper presents a state of the art review ...


Analysing The Quality Of Experience Of Multisensory Media From Measurements Of Physiological Responses, Jacob Donley, Christian H. Ritz, Muawiyath Shujau Jan 2014

Analysing The Quality Of Experience Of Multisensory Media From Measurements Of Physiological Responses, Jacob Donley, Christian H. Ritz, Muawiyath Shujau

Faculty of Engineering and Information Sciences - Papers: Part A

This paper investigates the Quality of Experience (QoE) of multisensory media by analysing biosignals collected by electroencephalography (EEG) and eye gaze sensors and comparing with subjective ratings. Also investigated is the impact on QoE of various levels of synchronicity between the sensory effect and target video scene. Results confirm findings from previous research that show sensory effects added to videos increases the QoE rating. While there was no statistical difference observed for the QoE ratings for different levels of sensory effect synchronicity, an analysis of raw EEG data showed 25% more activity in the temporal lobe during asynchronous effects and ...


Let Me Be Learned: Decision Support Aiding Public Participation, Raymond Laine, Christopher David Cook Jan 2014

Let Me Be Learned: Decision Support Aiding Public Participation, Raymond Laine, Christopher David Cook

Faculty of Engineering and Information Sciences - Papers: Part A

With best practice flood risk management processes rightly emphasising the need for a collaborative, transparent and inclusive approach to improve community resilience, this paper explores a new Engagement Decision Support System (EDSS) as a mechanism to assist in this process. This paper presents the need, theory and development of a flood risk management EDSS and presents trial results, where the tool has been successfully utilised for three catchments in New South Wales, Australia. The results from these trials indicate that a well-structured, engagement focused decision support system can provide a mechanism for and empower the public to learn about, prioritise ...


Removing The Impulsive Noise Contained In A Self-Mixing Interferometry System Using Outlier Detection, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Sheng Tong Jan 2014

Removing The Impulsive Noise Contained In A Self-Mixing Interferometry System Using Outlier Detection, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Sheng Tong

Faculty of Engineering and Information Sciences - Papers: Part A

Impulsive noise is a major problem that seriously degrades the performance of self-mixing interferometry (SMI). A new method to rectify this issue is proposed. First, an outlier detection approach is employed to detect the data samples corrupted by the impulsive noise, and then the SMI signal waveform is rectified by means of least square (LS) curve fitting. The results show that the proposed method can effectively remove the impulsive noise without introducing distortion to the original waveform and thus lead to improvement in the performance of an SMI system.