Social and Behavioral Sciences Commons^™

Three-Dimensional Measurement With Reflection Suppression Based On High-Dynamic Range Images, Limei Song, Yuan Ru, Yangang Yang, Qinghua Guo, Xinjun Zhu, Jiangtao Xi

Faculty of Engineering and Information Sciences - Papers: Part B

To deal with the three-dimensional (3-D) point cloud loss caused by object reflection in the active fringe projection 3-D measurement, an active reflection suppression method for 3-D measurement is proposed. The method employs high-dynamic range images obtained by multiple exposure image fusion and a three-wavelength phase-shift profilometry method to achieve high-precision 3-D measurement of reflective objects. Experimental results show that, compared to traditional 3-D measurement methods, the proposed one can more effectively handle reflections thereby avoiding 3-D point cloud loss in the measurement of reflective objects.

Characterization Of Amorphous Magnetic Materials Under High-Frequency Non-Sinusoidal Excitations, Md. Ashib Rahman, Md Rabiul Islam, Kashem M. Muttaqi, Danny Sutanto

Faculty of Engineering and Information Sciences - Papers: Part B

In power electronic based energy conversion, the high-frequency transformer (HFT) is usually excited with a high-frequency (HF) square wave voltage generated from a power electronic converter circuit (PEC). A PEC needs a reasonable dead-band (DB) and the inclusion of the DB changes the shape of the square wave. In this paper, for the characterization of the core, the DB is varied to produce different non-sinusoidal excitation voltages and an optimized excitation voltage is identified. The effect of the DB on the hysteresis loop of the HFT is also demonstrated. The mathematical analysis shows that the inclusion of the DB causes …

Towards Multi-User Searchable Encryption Supporting Boolean Query And Fast Decryption, Yunling Wang, Jianfeng Wang, Shi Sun, Joseph K. Liu, Willy Susilo, Joon Sang Baek, Ilsun You, Xiaofeng Chen

Faculty of Engineering and Information Sciences - Papers: Part B

Searchable encryption enables the data owner to outsource their data to the cloud server while retaining the search ability. Recently, some researchers proposed a variant of searchable encryption, named single-writer/multi-reader searchable encryption (SMSE), in which any authorized data user can perform a search query. That is, each document identifier is encrypted using attribute-based encryption (ABE), such that an arbitrary authorized user whose attributes match the corresponding access policy can access the document. However, the cloud server cannot determine whether the user has the ability to decrypt the matched data. Thus, it has to response all the search results to the …

Experimental Investigation And Modeling Of The Transformation Of Illicit Drugs In A Pilot-Scale Sewer System, Jiaying Li, Jianfa Gao, Phong K. Thai, Adam Shypanski, Ludwika Nieradzik, Jochen F. Mueller, Zhiguo Yuan, Guangming Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

In-sewer stability of illicit drug biomarkers has been evaluated by several reactor-based studies, but less has beendone in sewer pipes. Experiments conducted in sewer pipes have advantages over lab-scale reactors in providing more realisticbiomarker stability due to theflow and biological dynamics. This study assessed the transportation and transformation of sevenillicit drug biomarker compounds in a pilot-scale rising main and a gravity sewer pipe. Biomarkers presented diverse stabilitypatterns in the pilot sewers, based on which a drug transformation model was calibrated. This model was subsequently validatedusing transformation data sets from the literature, aiming to demonstrate the predictability of the pilot-based transformationcoefficients …

Pricing European Call Options Under A Hard-To-Borrow Stock Model, Guiyuan Ma, Song-Ping Zhu, Wenting Chen

Faculty of Engineering and Information Sciences - Papers: Part B

This paper studies European call option pricing problem under a hard-to-borrow stock model where stock price and buy-in rate are fully coupled. Avellaneda and Lipkin (2009) proposed a simplified solution approach with an independence assumption, and then derived a semi-explicit pricing formula. However, such an approach has limited its application to more general cases. In this paper, we propose a partial differential equation (PDE) approach for pricing European call options, regardless of the independence assumption. A two-dimensional PDE is derived first with a set of appropriate boundary conditions. Then, two numerical schemes are provided with different treatments of the jump …

Investigation Of The Consequence Of High-Pressure Co 2 Pipeline Failure Through Experimental And Numerical Studies, Xiong Liu, Ajit R. Godbole, Cheng Lu, Guillaume Michal, Valerie M. Linton

Faculty of Engineering and Information Sciences - Papers: Part B

Transportation of Carbon Dioxide (CO 2 ) via high-pressure pipelines from source to storage site forms an important link in the Carbon Capture and Storage (CCS)chain. To ensure the safety of the operation, it is necessary to develop a comprehensive understanding of the consequences of possible pipeline failure. CO 2 is a hazardous substance and an accidental release may lead to catastrophic damage. This paper describes an experimental investigation of the dispersion of CO 2 in the atmosphere in a full-scale burst test of a pipeline containing high-pressure dense phase CO 2 . The experiment was carried out to simulate …

Local-Global Interaction Buckling Of Square High Strength Concrete-Filled Double Steel Tubular Slender Beam-Columns, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

High-strength square concrete-filled double steel tubular (CFDST) slender beam-columns with a circular internal steel tube subjected to eccentric loads may undergo interaction local-global buckling. No computational studies on the interaction local-global buckling of slender square CFDST beam-columns have been reported and their behavior has not been fully understood. This paper describes a mathematical model for the simulation of the interaction local-global buckling behavior of square high-strength CFDST slender beam-columns under axial compression in combination with uniaxial bending. The mathematical model is formulated by the fiber approach, accounting for confinement provided by the internal circular steel tube, and geometric and material …

High Spatial Resolution Scintillator Dosimetry Of Synchrotron Microbeams, James Archer, Enbang Li, Jeremy A. Davis, Matthew Cameron, Anatoly B. Rosenfeld, Michael L. F Lerch

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Frequency Domain Characterization And Performance Bounds Of Alms Loop For Rf Self-Interference Cancellation, Anh Tuyen Le, Le Chung Tran, Xiaojing Huang, Y J. Guo, J (Yiannis) Vardaxoglou

Faculty of Engineering and Information Sciences - Papers: Part B

Analog Least Mean Square (ALMS) loop is a promising method to cancel self-interference (SI) in in-band fullduplex (IBFD) systems. In this paper, the steady state analyses of the residual SI powers in both analog and digital domains are firstly derived. Eigenvalue decomposition is then utilized to investigate the frequency domain characteristics of the ALMS loop. Our frequency domain analyses prove that the ALMS loop has an effect of amplifying the frequency components of the residual SI at the edges of the signal spectrum in the analog domain. However, the matched filter in the receiver chain will reduce this effect, resulting …

The Development And Ballistic Performance Of Protective Steel-Concrete Composite Barriers Against Hypervelocity Impacts By Explosively Formed Projectiles, Alex M. Remennikov, Edward Gan, Tuan D. Ngo, Michael Netherton

Faculty of Engineering and Information Sciences - Papers: Part B

Explosively formed projectiles (EFP) are one of the most severe explosive and impact loading threats for civil infrastructure and military vehicles. Currently, there is no effective means of protection for military vehicles and infrastructure facilities from EFPs. This paper presents the experimental results of the hypervelocity impact of EFPs on steel-concrete (SC) barrier systems of finite dimensions. The SC barrier units tested were broadly representative of the type of protective SC units used in the expedient construction of barriers for mitigating improvised explosive device (IED) and EFP threats to critical infrastructure facilities. The response of non-composite, partially-composite, and fully-composite SC …

Investigation Of Engineering Properties Of Normal And High Strength Fly Ash Based Geopolymer And Alkali-Activated Slag Concrete Compared To Ordinary Portland Cement Concrete, Nabeel Farhan, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Fly ash-based geopolymer (FAGP) and alkali-activated slag (AAS) concrete are produced by mixing alkaline solutions with aluminosilicate materials. As the FAGP and AAS concrete are free of Portland cement, they have a low carbon footprint and consume low energy during the production process. This paper compares the engineering properties of normal strength and high strength FAGP and AAS concrete with OPC concrete. The engineering properties considered in this study included workability, dry density, ultrasonic pulse velocity (UPV), compressive strength, indirect tensile strength, flexural strength, direct tensile strength, and stress-strain behaviour in compression and direct tension. Microstructural observations using scanning electronic …

A Comparative Study Of A Niti Alloy Subjected To Uniaxial Monotonic And Cyclic Loading-Unloading In Tension Using Digital Image Correlation: The Grain Size Effect, Xiaohui Bian, Azdiar Adil Gazder, Ahmed A. Saleh, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

The present digital image correlation study characterised the local axial and shear strain fields of a 56Ni-44Ti wt.% shape memory alloy with an average grain size of 100 μm, under uniaxial monotonic and cyclic loading-unloading in tension. To elucidate the grain size effect, the results were compared with a previous investigation of the same alloy with an average grain size of 10 μm. The maximum local axial strain rate signified the direction and extent of the localised transformation. The widened single inclined transformation band and multiple criss-crossing patterns assist in straightening the sample edge by releasing an in-plane moment instigated …

Smart Approaches In Facilitating Engineering Students To Learn Health Technology, Winson Lee, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

Partly due to the aging population around the world, job markets for developing biomedical devices and technology have been rapidly expanding. Organizations are recruiting engineers of various disciplines to design and test biomedical devices. This arouses interest of some engineering students to take academic subjects to learn some health technology, while keeping their main disciplines in specific engineering areas like mechanical engineering. Engineers need to have good understanding of the human body and different sorts of diseases, before they can apply good engineering solutions to solve the medical problems. However, teaching engineering students without prior education in medical-related aspects could …

Tele-Monitoring Technology As A Tool For Monitoring And Management Of Patients With Congestive Heart Failure, Elena Vlahu-Gjorgievska, Swetha Nagapuri, Khin Than Win

Faculty of Engineering and Information Sciences - Papers: Part B

Telehealth interventions are designed to facilitate the remote exchange of information and data between patients and health care providers, improving the quality and safety of the patients and increasing efficiency and cost-effectiveness of health care providers. The development of telecommunications and virtual technology allowed a number of telehealth systems to be applied in different health care areas. These technologies can provide an alternative monitoring and solutions for decreasing the hospital readmission rates for patients with congestive heart failure (CHF). In this paper, a systematic literature review regarding telemonitoring and its use in the management of patients with CHF is conducted. …

Experimental Study To Examine The Role Of Under Sleeper Pads For Improved Performance Of Ballast Under Cyclic Loading, Wickramarachchi Withanage Chamindi Jayasuriya, Buddhima Indraratna, Ngoc Trung Ngo

Faculty of Engineering and Information Sciences - Papers: Part B

The degradation and deformation of ballast critically affect the track geometry, safety, and passenger comfort. The increase in axle loads and train speed increases the stress applied on the ballast and exacerbates the rate of ballast degradation. This situation is more critical when tracks are built on stiff subgrades (e.g. bridges, tunnels and crossings), hence the use of energy absorbing (damping) layers in track substructure is a countermeasure to minimize track damage. In this study, a series of large-scale laboratory tests using the track process simulation testing apparatus (TPSA) is carried out to assess the performance of under sleeper pads …

Evaluation Of Data-Driven Models For Predicting The Service Life Of Concrete Sewer Pipes Subjected To Corrosion, Xuan Li, Faezehossadat Khademi, Yiqi Liu, Mahmoud Akbari, Chengduan Wang, Philip Bond, Jurg Keller, Guangming Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Concrete corrosion is one of the most significant failure mechanisms of sewer pipes, and can reduce the sewer service life significantly. To facilitate the management and maintenance of sewers, it is essential to obtain reliable prediction of the expected service life of sewers, especially if that is based on limited environmental conditions. Recently, a long-term study was performed to identify the controlling factors of concrete sewer corrosion using well-controlled laboratory-scale corrosion chambers to vary levels of H2S concentration, relative humidity, temperature and in-sewer location. Using the results of the long-term study, three different data-driven models, i.e. multiple linear regression (MLR), …

Massive Landsliding In Narrabeen Sandstones In The Watagan Region, S G. Fityus, Phil Flentje, R Rigby

Faculty of Engineering and Information Sciences - Papers: Part B

The Narrabeen Group is a thick sequence of bedded Triassic sandstones which occupies the stratigraphic interval between the Permian coal measures and the Hawkesbury Sandstone in the Sydney Basin. In the northern Sydney Basin it is laterally extensive, extending throughout the southern Hunter Valley from the Central Coast to beyond the Great Divide. In the Watagans region, a unique situation arises where a disconformity causes the Narrabeen group to be underlain directly by Permian upper marine sediments. The result is a dramatic occurrence of ancient massive landsliding, leading to steep sandstone slopes that break to an elevated detrital plane, of …

Fringe Projection Profilometry For The 3d Shape Measurement Of Objects With Three-Dimensional Movements, Chengpu Duan, Yiwei Zhang, Jiangtao Xi, Jun Tong, Yanguang Yu, Qinghua Guo

Faculty of Engineering and Information Sciences - Papers: Part B

© 2019 SPIE. Phase shifting profilometry (PSP) is considered as an effective method for 3D shape measurement based on fringe projection. However, PSP is not suitable for dynamic measurement, as it requires that the object be kept still. Movement of the object during the cause of projection of multiple fringe patterns may lead to significant error in the measurement of the 3D shape. A number of approaches were proposed to combat this problem consisting of two steps: Capturing of the movement and then compensation (or correction) of fringe patterns. However, such compensation is only valid for the cases where the …

Improve 3d Shape Reconstruction With Dual-Camera Measurement Fusion, Yuewen Zhu, Qinghua Guo, Jiangtao Xi, Yanguang Yu, Jun Tong

Faculty of Engineering and Information Sciences - Papers: Part B

© 2019 SPIE. In this work, we consider the problem of 3D shape reconstruction with a system with two cameras and one projector, which can be regarded as a composite system with two fringe projection profilometry (FPP) systems and one stereo vision (SV) system. Different from the active SV systems in the literature where FPP is used to assist SV to address the issue of corresponding matching, a new system is proposed in this paper by constructing a fusion cost function with the consideration of both FPP and SV triangulations, so that the measurements of the two cameras can be …

Changes In The Incidence And Uptake Of Reproductive Surgery Versus In Vitro Fertilisation In Australia Between 2001 And 2015: A Population-Based Study, Leon Foster, Stephen Robson, Anusch Yazdani, Pauline Y. O'Shaughnessy

Faculty of Engineering and Information Sciences - Papers: Part B

© 2018 The Royal Australian and New Zealand College of Obstetricians and Gynaecologists Objective: Improvements in success rates of assisted reproduction led to predictions that infertility surgery in both women and men would become extinct in developed countries. We sought to identify the changes in reproductive surgery that occurred between 2001 and 2015 to determine whether these predictions have been accurate. Design: The Australian Institute of Health and Welfare (AIHW) national procedural dataset and the Australian Medicare Benefits Scheme (MBS) claims database were searched for procedure data for male and female reproductive surgery and assisted reproduction from January 2001 to …

Review Of Coal And Gas Outburst In Australian Underground Coal Mines, Dennis J. Black

Faculty of Engineering and Information Sciences - Papers: Part B

Outburst of coal and gas represents a significant risk to the health and safety of mine personnel working in development and longwall production face areas. There have been over 878 outburst events recorded in twenty-two Australian underground coal mines. Most outburst incidents have been associated with abnormal geological conditions. Details of Australian outburst incidents and mining experience in conditions where gas content was above current threshold levels are presented and discussed. Mining experience suggests that for gas content below 9.0 m 3 /t, mining in carbon dioxide (CO 2 ) rich seam gas conditions does not pose a greater risk …

Derivative-Based Acceleration Of General Vector Machine, Binbin Yong, Fucun Li, Qingquan Lv, Jun Shen, Qingguo Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

General vector machine (GVM) is one of supervised learning machine, which is based on three-layer neural network. It is capable of constructing a learning model with limited amount of data. Generally, it employs Monte Carlo algorithm (MC) to adjust weights of the underlying network. However, GVM is time-consuming at training and is not efficient when compared with other learning algorithm based on gradient descent learning. In this paper, we present a derivative-based Monte Carlo algorithm (DMC) to accelerate the training of GVM. Our experimental results indicate that DMC algorithm is faster than the original MC method. Specifically, the training time …

A Novel Cloud Based Auxiliary Medical System For Hypertension Management, Rui Zhou, Yunshan Cao, Rui Zhou, Qingwei Zhou, Jun Shen, Qingguo Zhou, Haifeng Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

As a common disease, hypertension (HTN) can lead to severe complications such as heart failure, renal failure and stroke. However, delayed diagnosis often happens because of no obvious symptoms in earlier stage. This paper addresses the issue through a novel cloud based auxiliary medical system for HTN. Nowadays, telemedicine has been used to diagnose and monitor HTN by sharing and consulting personal health status with doctors. Its high flexibility and processing ability have helped to reduce the overall cost of medical care and enhanced the control rate. Technically, telemedicine uses communication, holographic imaging and computer science to achieve the management …

Occurrence And Bioconcentration Of Micropollutants In Silver Perch (Bidyanus Bidyanus) In A Reclaimed Water Reservoir, Ashley Terechovs, Ashley Ansari, James A. Mcdonald, Stuart J. Khan, Faisal I. Hai, Nathan A. Knott, John L. Zhou, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part B

This study examined the occurrence of 49 micropollutants in reclaimed water and Silver Perch (Bidyanus bidyanus) living in a reclaimed water reservoir. The numbers of micropollutants detected in reclaimed water, Silver Perch liver, and Silver Perch flesh were 20, 23, and 19, respectively. Concentrations of all micropollutants in reclaimed water, except benzotriazole, were well below the Australian Guideline for Recycled Water (AGRW) values for potable purposes. The concentration of benzotriazole in reclaimed water was 675 ± 130 ng/L while the AGRW value for this compound was 7 ng/L. Not all micropollutants detected in the water phase were identified in the …

Estimating Spatial Changes Over Time Of Arctic Sea Ice Using Hidden 2x2 Tables, Bohai Zhang, Noel A. Cressie

Faculty of Engineering and Information Sciences - Papers: Part B

Arctic sea ice extent has been of considerable interest to scientists in recent years, mainly due to its decreasing temporal trend over the past 20 years. In this article, we propose a hierarchical spatio-temporal generalized linear model for binary Arctic sea-ice-extent data, where statistical dependencies in the data are modeled through a latent spatio-temporal linear mixed effects model. By using a fixed number of spatial basis functions, the resulting model achieves both dimension reduction and non-stationarity for spatial fields at different time points. An EM algorithm is proposed to estimate model parameters, and an empirical-hierarchical-modeling approach is applied to obtain …

Influence Of Molecular Structure On Lubrication Of Aqueous Triblock Copolymer Lubricants Between Rutile Surfaces: An Md Approach, Thi D. Ta, Anh Kiet Tieu, Hongtao Zhu, Shanhong Wan, Hoang The Phan, Jingcheng Hao

Faculty of Engineering and Information Sciences - Papers: Part B

The influence of molecular structure on adsorption and lubrication of aqueous triblock copolymer on TiO2surfaces has been investigated using a realistic MD model. Reference data obtained from DFT calculations have been employed to develop an interaction potential between the copolymer and TiO2surface. The results show that R Pluronics form an anchor-buoy-anchor structure absorbed on TiO2surface and L Pluronic for buoy-anchor-buoy structure. The shear of tribo-system influences slightly on the orientation of copolymers and non-slip behavior has been observed at solid-fluid interfaces due to the strong adhesion strength of copolymer on rutile surface. The shear viscosity increases with copolymer concentration and …

Numerical Analysis Of Axially Loaded Rectangular Concrete-Filled Steel Tubular Short Columns At Elevated Temperatures, Ghanim Mohammed Kamil, Qing Quan Liang, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Elevated temperatures significantly reduce the local buckling strengths of steel tubes and the ultimate strengths of rectangular concrete-filled steel tubular (CFST) columns exposed to fire. No fiber-based models have been developed that include local buckling effects on the fire-resistance of rectangular CFST columns. This paper presents a new fiber element model for the fire-resistance predictions of axially loaded rectangular CFST short columns at elevated temperatures considering local buckling. The thermal analysis problem of a CFST column is solved by the finite difference method to determine the temperature distribution within its cross-section including an air gap, concrete moisture content and the …

Minimal Hypersurfaces In The Ball With Free Boundary, Glen Wheeler, V.-M Wheeler

Faculty of Engineering and Information Sciences - Papers: Part B

In this note we use the strong maximum principle and integral estimates prove two results on minimal hypersurfaces F:Mn→Rn+1 with free boundary on the standard unit sphere. First we show that if F is graphical with respect to any Killing field, then F(Mn) is a flat disk. This result is independent of the topology or number or boundaries. Second, if Mn=Dn is a disk, we show the supremum of the curvature squared on the interior is bounded below by n times the infimum of the curvature on the boundary. These may be combined the give an impression of the curvature …

Work Pattern Of Neurology Nurses In A Chinese Hospital: A Time And Motion Study, Ping Yu, Liying Song, Siyu Qian, X Yao, Jue Huang, Lingtong Min, Xudong Lu, Huilong Duan, Ning Deng

Faculty of Engineering and Information Sciences - Papers: Part B

Aim: To investigate nursing work patterns in a neurology department in a Chinese hospital. Background: Knowledge of nursing work patterns is important for nursing management and work design, and for the evaluation of organizational process change associated with the introduction of an innovation.

Methods: A time‐and‐motion method was used to observe 14 registered nurses' (RNs') work patterns in a neurology department in a Chinese hospital. Results: There were 147 hr of observation. Overall, the most time‐consuming activities were verbal communication (28.5%) and documentation (28.3%), followed by indirect care (14.6%) and direct care (14%). Compared to support RNs, charge …

On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

This article addresses the pseudo-tetragonal nature of the crystal lattice of martensite in carbon-containing steels. It is proposed that the periodic distortion of c-cube edges by the presence of carbon atoms is better reflected in the root-mean-square distortions of martensite lattice than by the value of doublet splitting of the corresponding X-ray reflections of the martensite crystal.