Science and Technology Studies Commons^™

Cfd-Dem Modelling Of Powder Flows And Dust Generation Mechanisms - A Review, Luke Stone, Peter W. Wypych, David B. Hastie, Stefan Zigan

Faculty of Engineering and Information Sciences - Papers: Part B

Dust generation forms a large part of the challenges that bulk materials handling engineers face throughout the life of their career. Dust generation can lead to health problems, explosion risks, material segregation and environment pollution [1-5]. These conditions are typical of run of mine dump hoppers, grain silos, coal train dump stations and alumina storage silos. Computational Fluid Dynamic (CFD) models have been used successfully for predicting fluid flows with a high level of accuracy with the benefit of being less computationally expensive than in the past. Although CFD programs such as ANSYS can be used to successfully model fluids, …

Current Engineering Education And Training Practices On Aboriginal Cultural Heritage, Thomas Goldfinch, Xavier Hollis

Faculty of Engineering and Information Sciences - Papers: Part B

CONTEXT Previous research has highlighted the need for engineers to have some background knowledge of Indigenous Australian history, cultures and politics (Goldfinch, Ilango, Roland, and Willis, 2014; Leigh et al., 2015). This is particularly important where project engineers hold responsibility for developing or implementing Aboriginal cultural heritage management plans (Furry, 2015; Hartley, 2015) and compliance with relevant legislation (NSW Government, 2010; 2014). Engineering projects are often enabled, delayed, or significantly altered as a result of how sites and artefacts of significance are managed. At this stage, it is believed that engineers often negotiate these challenges with little to no training …

Detecting Visual Spoofing Using Classical Cryptanalysis Methods In Plagiarism Detection Systems, Yang-Wai Chow, Willy Susilo, Ilung Pranata, Ari Moesriami Barmawi

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Characterisation Of Water Sprays Using High-Speed Videography, Alan Green, Paul Cooper, Trent D. Penman, Ross A. Bradstock

Faculty of Engineering and Information Sciences - Papers: Part B

This paper reports on the characterisation of water sprays for the purpose of modelling the effectiveness of such sprays in mitigating the impacts of wildfires on residential buildings. Four types of water spray nozzles were experimentally tested and analysed using a single high-speed camera and image analysis software. The sprays were generated by a misting nozzle, a hollow-cone nozzle, a rotating 'butterfly' sprinkler and a deflector plate sprinkler. Back-illumination was used to produce silhouette images of droplets within each spray. The point spread function half-width of each droplet image was determined, to give an indication of the distance of the …

Behavior Of Large-Scale Hybrid Frp-Concrete-Steel Double-Skin Tubular Beams With Shear Connectors, J L. Zhao, Jin Guang Teng, Tao Yu, L J. Li

Faculty of Engineering and Information Sciences - Papers: Part B

Hybrid fiber-reinforced polymer (FRP)-concrete-steel double-skin tubular members (DSTMs) are a new form of hybrid members that consist of an outer tube made of FRP and an inner tube made of steel, with the space between them filled with concrete. The existing studies on hybrid DSTMs have been mainly focused on their use as compression members, with only a very limited number of studies on their use as flexural members [i.e., hybrid double-skin tubular beams (DSTBs)]. This paper presents the first ever experimental study on large-scale hybrid DSTBs with headed shear studs; the effect of an integrated deck is also examined. …

Study On Micro Hydro-Mechanical Deep Drawing Using Finite Element Method, Xiaoguang Ma, Jingwei Zhao, Wei Du, Xin Zhang, Laizhu Jiang, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

A numerical model was established to investigate the micro hydro-mechanical deep drawing process of austenitic stainless steel 304 foil (0.05 mm thickness). Due to the miniaturisation of the specimen size, the effect of grain size, gap distance and radial pressure during drawing process could be prominent. The results indicate that the appropriate radial pressure and gap distance could improve the limit drawing ratio (LDR) of manufactured cylindrical cups by reducing the friction resistance. The maximum LDR obtained in the present work reaches 3.2, which is much higher than that obtained by conventional deep drawing process.

Strongly Convex Functions, Moreau Envelopes And The Generic Nature Of Convex Functions With Strong Minimizers, Chayne Planiden, Xianfu Wang

Faculty of Engineering and Information Sciences - Papers: Part B

In this work, using Moreau envelopes, we define a complete metric for the set of proper lower semicontinuous convex functions. Under this metric, the convergence of each sequence of convex functions is epiconvergence. We show that the set of strongly convex functions is dense but it is only of the first category. On the other hand, it is shown that the set of convex functions with strong minima is of the second category.

Natural Prefabricated Vertical Drains-Structure And Geo-Hydraulic Properties, Thanh Trung Nguyen, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

Over the past decades synthetic prefabricated vertical drains (SPVDs) have been used in many regions around the world to accelerate the consolidation of soil, but because these synthetic polymeric materials last for decades, they are now seen as having adverse effects on the natural environment. Natural prefabricated vertical drains (NPVDs) on the other hand, which are made from agriculture products such as jute, coir, and straw can discharge excess pore pressure effectively and they are also environmentally friendly thanks to their biodegradability. This paper outlines the fundamental characteristics of prefabricated vertical jute drains (PVJDs) such as their structure, tensile strength, …

Advances In Embankment Engineering Through Soft Ground Improvement, Buddhima Indraratna, Rui Zhong, Cholachat Rujikiatkamjorn, Kirti Choudhary, Thanh Trung Nguyen

Faculty of Engineering and Information Sciences - Papers: Part B

In many countries, essential infrastructure is built along congested coastal regions that are composed of highly compressible soft and weak soils up to significant depths. For instance, alluvial and marine clay deposits have very low bearing capacity and excessive settlement characteristics, posing obvious design and maintenance challenges for constructing tall structures and large commercial buildings, as well as for developing port and transport infrastructure. Stabilising these very soft deposits is essential before commencing construction of infrastructure. A system of prefabricated vertical drains (PVD) combined with vacuum pressure and surcharge preloading has become an attractive ground improvement alternative in terms of …

Automated Replication Of Cone Beam Ct-Guided Treatments In The Pinnacle3 Treatment Planning System For Adaptive Radiotherapy, Catriona Hargrave, Nicole Mason, Robyn Guidi, Julie-Anne Miller, Jillian Becker, Matthew T. Moores, Kerrie Mengersen, Michael Poulsen, Fiona Harden

Faculty of Engineering and Information Sciences - Papers: Part B

Introduction: Time-consuming manual methods have been required to register cone-beam computed tomography (CBCT) images with plans in the Pinnacle3 treatment planning system in order to replicate delivered treatments for adaptive radiotherapy. These methods rely on fiducial marker (FM) placement during CBCT acquisition or the image mid-point to localise the image isocentre. A quality assurance study was conducted to validate an automated CBCT-plan registration method utilising the Digital Imaging and Communications in Medicine (DICOM) Structure Set (RS) and Spatial Registration (RE) files created during online image-guided radiotherapy (IGRT).

Methods: CBCTs of a phantom were acquired with FMs and predetermined setup errors …

Smart Design Of Hollow Aupt Nanospheres With A Porous Shell As Superior Electrocatalysts For Ethylene Glycol Oxidation, Qingqing Lu, Changting Wei, Litai Sun, Zeid A. Al Othman, Victor Malgras, Yusuke Yamauchi, Hongjing Wang, Liang Wang

Faculty of Engineering and Information Sciences - Papers: Part B

Hollow bimetallic electrocatalysts have recently stimulated increasing attention due to their accessible interior surface and bimetallic synergetic effect. Herein, for the first time, we successfully anchor a porous AuPt shell on modified silica spheres with the assistance of Pluronic F127. The whole process consists of simple ultrasonic mixing for 30 min at room temperature without any organic solvent. After metal deposition and silica etching, well-defined hollow structures are obtained in high yield. The hollow spheres are further characterized by scanning electron microscopy and transmission electron microscopy. The electrochemical analysis reveals that the as-prepared samples demonstrate superior electrocatalytic activity and durability …

Efficient Secure Matrix Multiplication Over Lwe-Based Homomorphic Encryption, Dung Hoang Duong, Pradeep Kumar Mishra, Masaya Yasuda

Faculty of Engineering and Information Sciences - Papers: Part B

Homomorphic encryption enables various calculations while preserving the data confidentiality. In this paper, we apply the somewhat homomorphic encryption scheme proposed by Brakerski and Vaikuntanathan (CRYPTO 2011) to secure matrix multiplication between two matrices. To reduce both the ciphertext size and the computation cost, we propose a new method to pack a matrix into a single ciphertexts so that it also enables efficient matrix multiplication over the packed ciphertexts. Our packing method generalizes Yasuda et al.'s methods (Security Comm. Networks 2015 and ACISP 2015), which are for secure inner product. We also implement our methods and give a comparison with …

An Analytical Evaluation Of Radial Consolidation With Respect To Drain Degradation, Thanh Trung Nguyen, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

On The Difficulties Of Quantifying The Segregation Of Fine Powder Blends, David B. Hastie

Faculty of Engineering and Information Sciences - Papers: Part B

This paper reports on the difficulties of finding an accurate and consistent test method for quantifying the segregation of two fine powders. The background is from an industrial project investigating the feasibility of blending pulverised coal and crushed nickel ore in a bulk materials handling application, to ultimately produce nickel. The feasibility of combining the two products early in the process was investigated due to the blend requiring various different handling methods throughout the industrial process, making the constituent products susceptible to segregation. In the experimental investigation, representative samples of each bulk material were used to create a range of …

Indoor Position Tracking Using Received Signal Strength-Based Fingerprint Context Aware Partitioning, Matthew D'Souza, Brendan Schoots, Montserrat Ros

Faculty of Engineering and Information Sciences - Papers: Part B

Mobile indoor localisation has numerous uses for logistics and health applications. Current wireless localisation systems experience reliability difficulties in indoor environments due to interference and also require a large number of wireless access points to ensure position accuracy and resolution. Localisation using wireless channel propagation characteristics, such as radio-frequency (RF) receives signal strength are subject to wireless interference. The Fingerprint Context Aware Partitioning (FCAP) tracking model used received RF signal strength fingerprinting, combined with context aware information about the user's indoor environment. The authors show the use of context aware information in the FCAP model, reduces the effect of wireless …

Concrete-Encased Steel Columns Confined With Large Rupture Strain Frp Composites: Axial Compression Tests, Le Huang, Shi Shun Zhang, Tao Yu, Zhenyu Wang

Faculty of Engineering and Information Sciences - Papers: Part B

Fibre Reinforced (FRP)-confined concrete-encased steel composite columns (FCSCs) are an emerging form of hybrid columns. The idea of a combined use of FRP-confined concrete and an encased steel section not only offers a durable and ductile structural form for new construction, but also can be practiced as an efficient method to retrofit/strengthen deteriorated steel columns. This paper presents a series of axial compression tests on concrete-encased steel columns confined with Large Rupture Strain (LRS) FRP composites, namely, Polyethylene Terephthalate (PET) FRP composites. A total of 12 circular specimans, including 6 FCSCs and 6 FRP-confined concrete circular columns (FCCCs) were tested, …

A Bottom-Up Data Collection Methodology For Characterising The Residential Building Stock In Australia, Clayton Mcdowell, Georgios Kokogiannakis, Paul Cooper, Michael P. Tibbs

Faculty of Engineering and Information Sciences - Papers: Part B

In Australia the majority of the current residential building stock has been constructed with little regard to energy consumption or thermal comfort. With only 1-2 % of Australia's building stock being replaced each year retrofitting solutions are necessary if residential energy consumption is to be reduced. Australia's records of the characteristics of its current building stock are minimal and outdated and thus these need to be renewed to enable the evaluation of retrofit upgrade strategies. Thus this paper presents a methodology and results of a bottom-up data collection tool that captured building and occupant characteristics from 200 elderly low income …

Coupling A Thermal Comfort Model With Building Simulation For User Comfort And Energy Efficiency, Katharina Boudier, Massimo Fiorentini, Sabine Hoffmann, Raghuram Kalyanam, Georgios Kokogiannakis

Faculty of Engineering and Information Sciences - Papers: Part B

This paper describes a methodology for coupling an advanced model of the thermo-regulatory system of the human body that describes its physiological processes, a comfort model that evaluates thermal sensation and comfort, and the ESP-r building simulation software that computes the transient thermal response of a building model. The objective of this study was to utilise the physiology and comfort models to dynamically modify the heating and cooling temperature set points of a zone controller in ESP-r, in accordance with the computed human thermal sensation and achieve realtime thermal comfort management. The comunication between the software is managed by the …

Magnetic Resonance Imaging In Lung: A Review Of Its Potential For Radiotherapy, Shivani Kumar, Gary P. Liney, Robba Rai, Lois C. Holloway, Daniel Moses, Shalini K. Vinod

Faculty of Engineering and Information Sciences - Papers: Part B

MRI has superior soft-tissue definition compared with existing imaging modalities in radiation oncology; this has the added benefit of functional as well as anatomical imaging. This review aimed to evaluate the current use of MRI for lung cancer and identify the potential of a MRI protocol for lung radiotherapy (RT). 30 relevant studies were identified. Improvements in MRI technology have overcome some of the initial limitations of utilizing MRI for lung imaging. A number of commercially available and novel sequences have shown image quality to be adequate for the detection of pulmonary nodules with the potential for tumour delineation. Quantifying …

On Minimizing Data Forwarding Schedule In Multi Transmit/Receive Wireless Mesh Networks, He Wang, Kwan-Wu Chin, Sieteng Soh

Faculty of Engineering and Information Sciences - Papers: Part B

A key problem in wireless mesh networks is forwarding packets to/from one or more gateways with connectivity to the Internet. In this respect, a short link schedule, which determines the transmission time of links, is critical. To date, existing link schedulers do not consider routers that incorporate advances in multiple input multiple output communications, i.e., interference cancellation and spatial multiplexing. In particular, these routers are able to transmit or receive distinct packets on all their links concurrently as well as deliver multiple packets to a neighbor simultaneously. To this end, we consider the problem of deriving a time division multiple …

High-Speed Adaptive Wireless Body Area Networks, Miftadi Sudjai, Le Chung Tran, Farzad Safaei, Tadeusz A. Wysocki, Son Lam Phung

Faculty of Engineering and Information Sciences - Papers: Part B

Adaptive ultra-wideband wireless body area network (WBAN) is proposed in this paper as a feasible mobile health platform, offering a high-speed and robust service. It employs a space-time-frequency-coded (STFC) multiband orthogonal frequency division multiplexing ultra-wideband technology. It is designed to improve the average bit error performance for high data rate applications while maintaining a reasonably high throughput in body-to-external links of a WBAN. The proposed adaptive WBAN comprises two novel components, namely, the frame transmission model and the bit error rate (BER) estimation-based adaptive algorithm. In addition, the optimization of adaptive parameters is conducted to obtain an extra improvement, hence …

A New Torque Distribution Strategy For Blended Anti-Lock Braking Systems Of Electric Vehicles Based On Road Conditions And Driver's Intentions, Wenfei Li, Haiping Du, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

This paper proposes a new braking torque distribution strategy for electric vehicles equipped with a hybrid hydraulic braking and regenerative braking system. The braking torque distribution strategy is proposed based on the required braking torque and the regenerative braking system's status. To get the required braking torque, a new strategy is designed based on the road conditions and driver's braking intentions. Through the estimated road surface, a robust wheel slip controller is designed to calculate the overall maximum braking torque required for the anti-lock braking system (ABS) under this road condition. Driver's braking intentions are classified as the emergency braking …

Optimization Of Process Parameters For Production Of Volatile Fatty Acid, Biohydrogen And Methane From Anaerobic Digestion, M A. Khan, Hao H. Ngo, Wenshan Guo, Y Liu, Long D. Nghiem, Faisal I. Hai, L J. Deng, J Wang, Y Wu

Faculty of Engineering and Information Sciences - Papers: Part B

The anaerobic digestion process has been primarily utilized for methane containing biogas production over the past few years. However, the digestion process could also be optimized for producing volatile fatty acids (VFAs) and biohydrogen. This is the first review article that combines the optimization approaches for all three possible products from the anaerobic digestion. In this review study, the types and configurations of the bioreactor are discussed for each type of product. This is followed by a review on optimization of common process parameters (e.g. temperature, pH, retention time and organic loading rate) separately for the production of VFA, biohydrogen …

Numerical Modeling Of Gas Flow In Coal Pores For Methane Drainage, Adel Taheri, Farhang Sereshki, Faramarz Doulati Ardejani, Ali Mirza

Faculty of Engineering and Information Sciences - Papers: Part B

The sudden explosion of methane during underground coal mining is a major dilemma. To mitigate its occurrence and reduce the extent of methane diffusion, gas drainage operations are carried out before mining. This paper investigates methane gas flow in a coal block in order to calculate the pressure of gas and its molecule velocity for methane gas drainage operation. A coal piece surrounded by cleats was used for geometrical modeling and numerical simulation. Movements of fluid and gas molecules in a porous medium were successfully simulated. The numerical solution is based on COMSOL Multiphysics software. The validity of the numerical …

A Novel Fuzzy Sliding-Mode Control For Discrete-Time Uncertain System, T H. Yan, B Wu, B He, Weihua Li, R B. Wang

Faculty of Engineering and Information Sciences - Papers: Part B

This paper considers the sliding-mode control problem for discrete-time uncertain systems. It begins by presenting a discrete variable speed reaching law and a discrete-time sliding-mode controller (DSMC) designed using the proposed reaching law, followed by an analysis of their stability and dynamic performance. A sliding-mode controller with simple fuzzy logic is then proposed to further strengthen the dynamic performance of the proposed sliding-mode controller. Finally, the presented DSMC and the DSMC with fuzzy control for adjusting the parameters in this paper are compared with one of the previous proposed classic DSMC systems. The results of this simulation show that the …

Fault Diagnosis And Prognosis Of Critical Components, Dong Wang, Chuan Li, Achmad Widodo, Pavan K. Kankar, Wahyu Caesarendra

Faculty of Engineering and Information Sciences - Papers: Part B

Editorial

Influence Of Health Technology Assessment And Its Measurement, David M. Hailey, Sophie Werko, Mans Rosen, Karen Macpherson, Susan Myles, Veronica Gallegos Rivera, Cecilia Hipolito-Olivares, Sinnika Sihvo, Jasmine Pwu, Wen-Wen Yang, Yong-Chen Chen, Ana Perez Galan, Alicia Aleman, Elena Villamil

Faculty of Engineering and Information Sciences - Papers: Part B

OBJECTIVES: The aim of this study was to obtain information on methods used to measure health technology assessment (HTA) influence, decisions that were influenced, and outcomes linked to HTA. METHODS: Electronic databases were used to locate studies in which HTA influence had been demonstrated. Inclusion criteria were studies that reliably reported consideration by decision makers of HTA findings; comparative studies of technology use before and after HTA; and details of changes in policy, health outcomes, or research that could be credibly linked to an HTA. RESULTS: Fifty-one studies were selected for review. Settings were national (24), regional (12), both national …

The Use Of Polymeric And Metallic Geogrid On A Full‑Scale Mse Wall/Embankment On Hard Foundation: A Comparison Of Field Data With Simulation, Pankaj Baral, Dennes Bergado, Sowarapan Duangkhae

Faculty of Engineering and Information Sciences - Papers: Part B

A full-scale reinforced earth embankment was designed and constructed by the Department of Highways of Thailand on a hard foundation in Phitsanulok Province, Thailand. Two types of reinforcement were used in the embankment. One side was reinforced with polymeric reinforcement consisting of polyester (PET), polypropylene (PP) and high-density polyethylene (HDPE) and referred to as a reinforced steep slope (RSS), with an angle of 70° from horizontal. On the other side, the embankment was reinforced with metallic reinforcement consisting of metallic strips (MS) and steel wire grids (SWG) combined with vertical segmental concrete facing and referred to as a mechanically stabilised …