Social and Behavioral Sciences Commons^™

Towards Cost Reduction In Cloud-Based Workflow Management Through Data Replication, Fei Xie, Jun Yan, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

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 …

Discussion On Determination Of Gas Content Of Coal And Uncertainties Of Measurement, Abounavasse Saghafi

Faculty of Engineering and Information Sciences - Papers: Part B

Gas content of coal is mostly determined using a direct method, particularly in coal mining where mine safety is of paramount importance. Direct method consists of measuring directly the volume of gas desorbed from coal in several steps, from solid then crushed coal. In mixed gas conditions the composition of the desorbed gas is also measured to account for contribution of various coal seam gas in the mix. The determination of gas content using the direct method is associated with errors of measurement of volume of gas but also the errors associated with measurement of composition of the desorbed gas. …

Behaviour Of Fibre-Reinforced Rpc Columns Under Different Loading Conditions, Muhammad N. S Hadi, Ahmed Al-Tikrite

Faculty of Engineering and Information Sciences - Papers: Part B

This paper investigates experimentally the influence of steel fibres inclusion on the behaviour of Reactive Powder Concrete (RPC) columns. Micro steel fibre (MF) and deformed steel fibres (DF) were used. Steel fibres were hybridized to produce hybrid steel fibre (HF). Sixteen RPC specimens were cast and tested under axial loading, eccentric loading (25 mm and 50 mm) and four-point bending. Results of testing demonstrated that RPC specimens that included MF exhibited 8-58% higher load carrying capacity compared to the reference NF specimens. Moreover, RPC specimens that included HF showed 29-408% higher ductility under different loading conditions compared to the reference …

Behaviour Of Subballast Reinforced With Used Tyre And Potential Application In Rail Tracks, Buddhima Indraratna, Qideng Sun, Jim Grant

Faculty of Engineering and Information Sciences - Papers: Part B

Rubber tyres have a three dimensional cylindrical structure, and as such could be used to stabilise foundations by increasing the bearing capacity and reducing settlement for transport infrastructure. It is therefore expected that in railroad engineering, a capping layer reinforced with rubber tyres could help to reduce the thickness of the granular layer (i.e. ballast), improve the track bearing capacity, and reduce the frequency of maintenance. However, there is a notable gap between the conceptual theories and real-life applications pertaining to the mechanisms of rubber tyre-reinforced foundations. In pavement engineering, the bearing capacity is closely linked to plate load tests. …

Degradation Of Trace Organic Contaminants By A Membrane Distillation-Enzymatic Bioreactor, Muhammad Bilal Asif, Faisal I. Hai, Jinguo Kang, Jason P. Van De Merwe, Frederic Leusch, Kazuo Yamamoto, William E. Price, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part B

A high retention enzymatic bioreactor was developed by coupling membrane distillation with an enzymatic bioreactor (MD-EMBR) to investigate the degradation of 13 phenolic and 17 non-phenolic trace organic contam inants (TrOCs). TrOCs were effectively retained (90-99%) by the MD membrane. Furthermore, significant laccase-catalyzed degradation (80-99%) was achieved for 10 phenolic and 3 non-phenolic TrOCs that contain strong electron donating functional groups. For the remaining TrOCs, enzymatic degradation ranged from 40 to 65%. This is still higher than those reported for enzymatic bioreactors equipped with ultrafiltration membranes, which retained laccase but not the TrOCs. Addition of three redox-mediators, namely syringaldehyde (SA), …

Spatial Context In The Calculation Of Gas Emissions For Underground Coal Mines, Patrick Booth, Heidi K. Brown, Jan Nemcik, Ting X. Ren

Faculty of Engineering and Information Sciences - Papers: Part B

The prediction of gas emissions arising from underground coal mining has been the subject of extensive research for several decades, however calculation techniques remain empirically based and are hence limited to the origin of calculation in both application and resolution. Quantification and management of risk associated with sudden gas release during mining (outbursts) and accumulation of noxious or combustible gases within the mining environment is reliant on such predictions, and unexplained variation correctly requires conservative management practices in response to risk. Over 2500 gas core samples from two southern Sydney basin mines producing metallurgical coal from the Bulli seam have …

Experimental Analysis Of A Water Column And Structure Heave Velocity Relationship For A Floating Oscillating Water Column Wave Energy Device, York Stanham, Timothy J. Mccarthy, Brad Stappenbelt

Faculty of Engineering and Information Sciences - Papers: Part B

This paper investigates the theoretical conclusions of a numerical analysis. The results are reproduced experimentally using a two-dimensional model in a wave flume. The experimental set-up is conducted by subjecting the model to waves with frequencies ranging from 0.2 to 2 Hz. The heave velocities of the structure and water column are calculated by differentiating the displacement of each with respect to time. The experimental results confirm that the extent of the parametric relationship between the structure heave velocity and oscillating water column heave velocity is linearly related to the power output potential of the system and hence, can be …

Comparison Of The Exergy Efficiency Of Four Power Generation Systems From Methane Using Fuel Cells, Zhe-Lei Wang, Weiyu Fan, Guangqing Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

Exergy analyses are carried out on four different solid oxide fuel cell (SOFC) systems using methane as the original fuel, with focus on exergy flows, efficiency and destruction. The four processes are (1) CH₄-SOFC, which is a CH₄ directly fuelled SOFC system with a CO₂ capture unit; (2) CH₄-SOFC-CLC, in which the CH₄-SOFC system is integrated with chemical looping combustion (CLC); (3) SMR-SOFC, i.e. a SOFC system using H₂ (H₂-SOFC) generated by steam methane reforming (SMR); (4) MC-SOFC-DCFC, which is a combined system of H₂-SOFC and a …

Modelling Of The Human Shoulder Girdle As A 6-4 Parallel Mechanism With A Moving Scapulothoracic Joint, Aibek Niyetkaliyev, Shahid Hussain, Prashant K. Jamwal, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

Human shoulder movements involve motions at four different articulations, one of which is the contact between the scapula bone and the ribcage. The shoulder biomechanical models become less reliable when the scapulothoracic (ST) contact, which is not a joint in the anatomical sense, is not considered. On the other hand, constraints posed by the ST contact reduce the number of degrees of freedom (DOF) and introduce the interdependencies between the joint coordinates which in turn complicates the motion planning. However, a minimal parameterization that incorporates the constraints, notably simplifies costly computational procedure related to the model predictions. In this paper, …

Heat Transfer Analysis Of An Integrated Double Skin Facade And Phase Change Material Blind System, Yilin Li, Jo Darkwa, Georgios Kokogiannakis

Faculty of Engineering and Information Sciences - Papers: Part B

In this study, the heat transfer in an integrated double skin facade (DSF) and phase change material (PCM) blind system has been theoretically analysed. Both heat transfer and airflow models with CFD methods have been developed for the integrated DSF and PCM blind system. Data from an existing typical DSF building have been obtained in order to define input parameters for the simulation exercise and validate the numerical models. The temperature and velocity fields in DSF with the PCM blind system has been predicted under overheating scenario using the ANSYS Workbench FLUENT software and been compared with case of conventional …

Analysis On Integrated Lpg Cook Stove And Induction Cooktop For Cooking Purposes In Bhutan, Roshan Chheti, Dawa Chhoedron, Tilak Sunwar, Duane A. Robinson

Faculty of Engineering and Information Sciences - Papers: Part B

It has not been many years since a majority of Bhutanese were cooking with firewood as their fuel source. However, over the years the fuel mix has been changing and depicting increasing share of clean fuel such as electricity (hydropower generation) and liquefied petroleum gas (LPG). Subsequently there is a massive opportunity to switch into modern, clean and efficient cooking technologies such as induction cooktops and reduce the overall fuel/wood consumption. Induction cooktop is a fairly new concept in the country; therefore, users are often sceptical about investing in them due to lack of awareness on the cost-benefit analysis. Various …

Comparison Of Phantom Materials For Use In Quality Assurance Of Microbeam Radiation Therapy, Matthew Cameron, Iwan Cornelius, Dean L. Cutajar, Jeremy A. Davis, Anatoly B. Rosenfeld, Michael L. F Lerch, Susanna Guatelli

Faculty of Engineering and Information Sciences - Papers: Part B

Microbeam radiation therapy (MRT) is a promising radiotherapy modality that uses arrays of spatially fractionated micrometre-sized beams of synchrotron radiation to irradiate tumours. Routine dosimetry quality assurance (QA) prior to treatment is necessary to identify any changes in beam condition from the treatment plan, and is undertaken using solid homogeneous phantoms. Solid phantoms are designed for, and routinely used in, megavoltage X-ray beam radiation therapy. These solid phantoms are not necessarily designed to be water-equivalent at low X-ray energies, and therefore may not be suitable for MRT QA. This work quantitatively determines the most appropriate solid phantom to use in …

Contributions Of Secondary Fragmentation By Carbon Ion Beams In Water Phantom: Monte Carlo Simulation, C Ying, David Bolst, Linh T. Tran, Susanna Guatelli, Anatoly B. Rosenfeld, W Kamil

Faculty of Engineering and Information Sciences - Papers: Part B

Heavy-particle therapy such as carbon ion therapy is currently very popular because of its superior conformality in terms of dose distribution and higher Relative Biological Effectiveness (RBE). However, carbon ion beams produce a complex mixed radiation field, which needs to be fully characterised. In this study, the fragmentation of a 290 MeV/u primary carbon ion beam was studied using the Geant4 Monte Carlo Toolkit. When the primary carbon ion beam interacts with water, secondary light charged particles (H, He, Li, Be, B) and fast neutrons are produced, contributing to the dose, especially after the distal edge of the Bragg peak.

Study Protocol: Multi-Parametric Magnetic Resonance Imaging For Therapeutic Response Prediction In Rectal Cancer, Trang Pham, Gary P. Liney, Karen Ms Karen Wong, Roshika Rai, Mark T. Lee, Daniel Moses, Christopher Henderson, Michael Lin, Joo-Shik Shin, Michael Barton

Faculty of Engineering and Information Sciences - Papers: Part B

Background

Response to neoadjuvant chemoradiotherapy (CRT) of rectal cancer is variable. Accurate imaging for prediction and early assessment of response would enable appropriate stratification of management to reduce treatment morbidity and improve therapeutic outcomes. Use of either diffusion weighted imaging (DWI) or dynamic contrast enhanced (DCE) imaging alone currently lacks sufficient sensitivity and specificity for clinical use to guide individualized treatment in rectal cancer. Multi-parametric MRI and analysis combining DWI and DCE may have potential to improve the accuracy of therapeutic response prediction and assessment.

Methods

This protocol describes a prospective non-interventional single-arm clinical study. Patients with locally advanced rectal …

Validation Of Geant4 Fragmentation For Heavy Ion Therapy, David Bolst, Giuseppe A. Cirrone, Giacomo Cuttone, Gunter Folger, Sebastien Incerti, Vladimir N. Ivanchenko, Tatsumi Koi, Davide Mancusi, Luciano Pandola, Francesco Romano, Anatoly B. Rosenfeld, Susanna Guatelli

Faculty of Engineering and Information Sciences - Papers: Part B

¹²C ion therapy has had growing interest in recent years for its excellent dose conformity. However at therapeutic energies, which can be as high as 400 MeV/u, carbon ions produce secondary fragments. For an incident 400 MeV/u ¹²C ion beam, ~70% of the beam will undergo fragmentation before the Bragg Peak. The dosimetric and radiobiological impact of these fragments must be accurately characterised, as it can result in increasing the risk of secondary cancer for the patient as well as altering the relative biological effectiveness. This work investigates the accuracy of three different nuclear fragmentation models available in …

Diagonal-Preserving Gauge-Invariant Isomorphisms Of Graph C*-Algebras, Toke Meier Carlsen, James Rout

Faculty of Engineering and Information Sciences - Papers: Part B

We study graph C*-algebras equipped with generalised gauge actions, and characterise in terms of groupoids and groupoid cocycles when two graph C*-algebras are isomorphic by a diagonal-preserving isomorphism that intertwines the generalised gauge actions. We apply this characterisation to show that two Cuntz-Krieger algebras are isomorphic by a diagonal-preserving isomorphism that intertwines the gauge actions if and only if the corresponding one-sided subshifts are eventually conjugate, and that the stabilisation of two Cuntz-Krieger algebras are isomorphic by a diagonal-preserving isomorphism that intertwines the gauge actions if and only if the corresponding two-sided subshifts are conjugate.

The Atmospheric Infrared Sounder Retrieval, Revisited, Noel A. Cressie, Rui Wang, Benjamin Maloney

Faculty of Engineering and Information Sciences - Papers: Part B

The algorithm used in the retrieval of geophysical quantities from the Atmospheric Infrared Sounder (AIRS) instrument depends on two fundamental components. The first is a cost function that is the sum of squares of the differences between cloud-cleared radiances and their corresponding forward-model terms. The second is the minimization of this cost function. For the retrieval of carbon dioxide, the minimization is further improved using the method of vanishing partial derivatives (VPDs). In this letter, we show that this VPD component is identical to a coordinate descent method with Newton-Raphson updates, which allows it to be put in context with …

Energy Efficiency Within Mid-Rise Residential Buildings: A Critical Review Of Regulations In Australia, Emma Elizabeth Heffernan, Scott F. Beazley, Timothy J. Mccarthy, Mohammed I. Sohel

Faculty of Engineering and Information Sciences - Papers: Part B

Within Australia, increasingly more people are choosing to live in cities. Due to a need for urban densification and more affordable housing, for the first time, development approvals for multi-residential developments have overtaken those for individual houses. The growing sector of mid-rise residential buildings in Australian cities has the potential to contribute significantly to improving the energy efficiency of the building stock. However, there is limited empirical research on this sector within the Australian context. The mandatory framework for the energy efficiency of mid-rise residential developments in Australia, with a focus on New South Wales with its distinct regulatory requirements, …

The Effects Of Installation Procedure On Bond Characteristics Of Fully Grouted Rock Bolts, Shuqi Ma, Naj Aziz, Jan Nemcik, Ali Mirzaghorbanali

Faculty of Engineering and Information Sciences - Papers: Part B

The bond characteristics of fully grouted rockbolts installed in steel tubes were investigated by bolt push tests. Steel tubes were inserted in a mine roadway roof to represent the confinement of rock boreholes. Rockbolts were installed in tubes using the installation technique of Australian underground mines. These tubes, with rockbolts inside, were retrieved from the field and brought back to the laboratory to be cut into 100-mm sections, which were then push tested. It was found that each bolt section had a distinct load-displacement profile, and that bond strength varied significantly along the bolt length. The factors influencing the bond …

Diesel Particulate Matter Investigations In Underground Coal Mines, Ramakrishna Morla, Shivakumar Karekal

Faculty of Engineering and Information Sciences - Papers: Part B

A number of underground coal mines are using diesel-powered vehicles as the main source fuel for the transport. The primary concern with these diesel-operated vehicles is the diesel particulate matter (DPM), because it is known to be a carcinogenic agent after prolonged exposure. A well-designed ventilation system is necessary to dilute DPM, so that air quality is maintained to statutory guidelines. This paper outlines details of DPM characteristics, its health effects on miners, coal mine ventilation guidelines and some research investigations that underpin the control of DPM flow in underground coal mines.

Double-Mode Microparticle Manipulation By Tunable Secondary Flow In Microchannel With Arc-Shaped Groove Arrays, Qianbin Zhao, Sheng Yan, Dan Yuan, Jun Zhang, Haiping Du, Gursel Alici, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, we proposed a microparticle manipulation approach, by which particles are able to be guided to different equilibrium positions through modulating the Reynolds number. In the microchannel with arc-shaped groove arrays, secondary flow vortex arisen due to the pressure gradient varies in the aspects of both magnitude and shape with the increase of Reynolds number. And the variation of secondary flow vortex brings about different focusing modes of microparticles in the microchannel. We investigated the focusing phenomenon experimentally and analyzed the mechanism through numerical simulations. At a high Reynolds number (Re & #x003D; 127.27), the geometry-induced secondary flow …

Tribochemistry Of Adaptive Integrated Interfaces At Boundary Lubricated Contacts, Shanhong Wan, Anh Kiet Tieu, Yana Xia, Liping Wang, Dong Shan Li, Guang An Zhang, Hongtao Zhu, Bach H. Tran, David R. G Mitchell

Faculty of Engineering and Information Sciences - Papers: Part B

Understanding how an adaptive integrated interface between lubricant additives and solid contacts works will enable improving the wear and friction of moving engine components. This work represents the comprehensive characterization of compositional and structural orientation at the sliding interface from the perspective of surface/interface tribochemistry. The integrated interface of a lubricant additive-solid resulting from the friction testing of Graphite-like carbon (GLC) and PVD-CrN coated rings sliding against cast iron under boundary lubrication was studied. The results indicate that in the case of the CrN/cast iron pair the antiwear and friction behavior were very strongly dependent upon lubricant. In contrast, the …

Aligning Business Strategy With It Strategy From Business Model To Enterprise In Saudi Arabia Public Sector, Abdulaziz Alghazi, Mengxiang Li, Jun Shen, Samuel Fosso Wamba

Faculty of Engineering and Information Sciences - Papers: Part B

Over the last decades researchers seem to have big concerns on the complexity of business-IT alignment with the government organizational strategy goals. The Saudi Arabian (SA) government is one of the world’s governments that has launched the national government strategy for 2030 to all public sectors to enhance performance. This research proposal is aimed at investigating the adoption performance of alignment strategy incorporated by the SA government in order to benefit of IT infrastructure and achieve high performance, quality of service (QoS) and return of investment (ROI). This study will use mixed method design combines both qualitative and quantitative methods …

Organizing Online Computation For Adaptive Micro Open Education Resource Recommendation, Geng Sun, Tingru Cui, Ghassan Beydoun, Shiping Chen, Dongming Xu, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

Our previous work, Micro Learning as a Service (MLaaS), aimed to deliver adaptive micro open education resources (OERs). However, relying solely on the offline computation, the recommendation lacks rationality and timeliness. It is also difficult to make the first recommendation to a new learner. In this paper we introduce the organization of the online computation of the MLaaS. It targets at solving the cold start problem due to the shortage of learner information and real-time updates of the learner-micro OER profile

Impact Of A Pilot Draught Sealing Program On Public Housing Air Permeability, Craig G. Mclauchlan, Laia Ledo Gomis, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part B

Air tightness (or permeability) is a property of a building envelope that describes how air moves though it when subjected to a pressure difference (wind, stack effect, etc.), this impacts on building performance including energy usage, thermal comfort and air quality. The NSW Land and Housing Corporation (LAHC) implemented a pilot program of simple leak (or draught) sealing measures to improve air permeability and building performance on some of its domestic building stock. The effectiveness of this program was evaluated via blower door testing to international standards including measuring overall envelope permeability, and qualitative and quantitative investigation of the leakage …

Editorial To The Proceedings Of The Improving Residential Energy Efficiency International Conference, Iree 2017, Zhenjun Ma, Georgios Kokogiannakis, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part B

Editorial to proceedings of Improving Residential Energy Efficiency International Conference, IREE 2017, 16-17 February 2017, Wollongong, Australia

Numerical Analysis Of Indoor Thermal Comfort In A Cross-Ventilated Space With Top-Hung Windows, Xiang Deng, Paul Cooper, Zhenjun Ma, Georgios Kokogiannakis

Faculty of Engineering and Information Sciences - Papers: Part B

Natural ventilation can be used in residential buildings in several Australian climatic zones and well-designed windows have the potential to facilitate indoor thermal comfort by allowing occupants to control volumetric outdoor airflow and indoor air velocities. Top-hung window is one of the most popular window types in Australia. This paper investigates the effect of the attributes of top-hung windows (i.e. window length, aspect ratio, height above the ground, window opening angle and the fly screen porosity) and outdoor air conditions (i.e. outdoor air temperature, wind speed and direction) on indoor thermal comfort during cross ventilation using CFD simulations. The Taguchi …

Performance Evaluation Of A Novel Frost-Free Air-Source Heat Pump Integrated With Phase Change Materials (Pcms) And Dehumidification, Zhihua Wang, Fenghao Wang, Zhenjun Ma, Chun Li, Yibo Xu

Faculty of Engineering and Information Sciences - Papers: Part B

Air-source heat pump (ASHP) has been widely used in domestic and commercial buildings because of its energy savings, high efficiency and environmental friendliness. However, the heating capacity of an ASHP system is greatly influenced by the frost accumulation on the surface of the outdoor exchanger. To solve this problem, a novel frost-free ASHP system, integrating with Phase Change Materials (PCMs) and dehumidification, has been developed. In this paper, the schematic design of this system is first presented. The effect of the match relationship between the desiccant materials and PCM thermal energy storage on the performance of the novel system is …

Simulation Of The Melting Process Of Ice Slurry For Energy Storage Using A Two-Fluid Lattice Boltzmann Method, Qi Lin, Shugang Wang, Zhenjun Ma, Jihong Wang, Tengfei Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

Ice slurry can be used as the thermal storage media in latent cool storage systems for both residential and commercial buildings. This paper presents the investigation of the phase change characteristics of the ice slurry using a two-fluid Lattice Boltzmann Method (TFLBM). The melting and migration processes of the ice slurry are simulated by improving the equilibrium distribution function and matching the relevant parameters such as the kinetic viscosity of ice particle cluster and cross-collision coefficient. The sensitivity analysis of the ice slurry viscosity and cross-collision coefficient are achieved through six numerical experiments, and the ice melting in the internal-melt …