Social and Behavioral Sciences Commons^™

Compressive Behaviour Of Large Rupture Strain Frp-Confined Concrete-Encased Steel Columns, Le Huang, S S. Zhang, Tao Yu, Zhenyu Wang

Faculty of Engineering and Information Sciences - Papers: Part B

Fibre-reinforced polymer (FRP)-confined concrete-encased steel columns (FCSCs) have emerged as a new form of hybrid columns. An FCSC consists of an outer FRP tube, an inner steel section, and concrete filled in between. The concept of FCSCs not only provides a durable and ductile structural form for new construction, but also can be practiced as an effective method for the retrofitting/strengthening of existing steel columns. This paper presents the first ever study on FCSCs with a large rupture strain (LRS) FRP tube [i.e., polyethylene terephthalate (PET) FRP tube]. A total of 12 circular specimens (six FCSCs and six FRP-confined concrete …

On Covariance Matrix Based Spectrum Sensing Over Frequency-Selective Channels, Ming Jin, Qinghua Guo, Youming Li

Faculty of Engineering and Information Sciences - Papers: Part B

This paper concerns covariance matrix based spectrum sensing over frequency selective channels. The impact of frequency selective channels on the covariance matrix of received signals is analyzed in frequency domain and it is shown that the phases of channel spectra degrade the performance of covariance matrix based detectors. To overcome this problem, we propose a new detector which employs only the magnitude spectra of received signals and thereby achieves considerable performance gain. Theoretical performance, in terms of the false-alarm and detection probabilities of the proposed detector, is analyzed. Simulation results verify our theoretical analyses and demonstrate the superior performance of …

Nucleation, Coarsening And Deformation Accommodation Mechanisms Of Ε-Martensite In A High Manganese Steel, Sudipta Pramanik, Azdiar Adil Gazder, Ahmed A. Saleh, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

The nucleation, coarsening and deformation accommodation mechanisms of ε-martensite in an Fe‐17Mn‐3Al‐2Si‐1Ni‐0.06C wt.% high manganese steel subjected to plane strain compression and cold-rolling up to 88% thickness reduction was studied using a combination of electron microscopy techniques.

Mechanical Properties Of Micro-Steel Fibre Reinforced Magnesium Potassium Phosphate Cement Composite, Hu Feng, M Neaz Sheikh, Muhammad N. S Hadi, Danying Gao, Jun Zhao

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents the mechanical properties of micro-steel fibre (MSF) reinforced magnesium potassium phosphate cement (MPPC) composites with multi-composite retarder. The compressive strength, flexural strength, flexural toughness and flexural ductility of the MSF reinforced MPPC composite (MSFRMC) were experimentally explored. The variables of the experiment included sand-cement mass ratio, water-cement mass ratio, curing time and fibre volume fraction. In addition, the effect of different types of cement on the mechanical properties of MSF reinforced composites was investigated. It was found that with the increase of water content in the MPPC paste, the average compressive strength, flexural strength and flexural toughness …

Performance Evaluation And Lubrication Mechanism Of Water-Based Nanolubricants Containing Nano-Tio2 In Hot Steel Rolling, Hui Wu, Jingwei Zhao, Liang Luo, Shuiquan Huang, Lianzhou Wang, Suoquan Zhang, Sihai Jiao, Han Huang, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Hot rolling tests of a low-alloy steel were conducted at a rolling temperature of 850 °C under different lubrication conditions, including benchmarks (dry condition and water) and water-based nanolubricants containing different concentrations of nano-TiO₂ from 1.0 to 8.0 wt%. The effects of nanolubricants on rolling force, surface roughness, thickness of oxide scale, and microstructure were systematically investigated through varying nano-TiO₂ concentrations. The results show that the application of nanolubricants can decrease the rolling force, surface roughness and oxide scale thickness of rolled steels, and refine ferrite grains. In particular, the nanolubricant containing an optimal concentration (4.0 wt%) of …

Effect Of Isochronal Annealing On The Microstructure, Texture And Mechanical Properties Of A Cold-Rolled High Manganese Steel, Sudipta Pramanik, Ahmed A. Saleh, Elena V. Pereloma, Azdiar Adil Gazder

Faculty of Engineering and Information Sciences - Papers: Part B

A Fe-17Mn-3Al-2Si-1Ni-0.06C wt.% steel was subjected to cold-rolling to 42% thickness reduction and isochronally annealed for 300 s between 500 and 850 °C. The high Mn steel was characterised via electron back-scattering diffraction, transmission electron microscopy and uniaxial tensile testing. The reversion of deformation-induced ε and α′-martensite to austenite (γ) was witnessed with the formation of fine twins in reverted/recovered γ grains after annealing to 650 °C. The nucleation of new γ grains at the boundary of reverted/recovered γ grains was also noted. Upon reversion, the γ orientations originated from the ε and α′-martensite orientations by phase transformation via the …

Preferred Traces On C⁎-Algebras Of Self-Similar Groupoids Arising As Fixed Points, Joan Claramunt, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part B

Recent results of Laca, Raeburn, Ramagge and Whittaker show that any self-similar action of a groupoid on a graph determines a 1-parameter family of self-mappings of the trace space of the groupoid C⁎-algebra. We investigate the fixed points for these self-mappings, under the same hypotheses that Laca et al. used to prove that the C⁎-algebra of the self-similar action admits a unique KMS state. We prove that for any value of the parameter, the associated self-mapping admits a unique fixed point, which is a universal attractor. This fixed point is precisely the trace that extends to a KMS state on …

Chern Numbers, Localisation And The Bulk-Edge Correspondence For Continuous Models Of Topological Phases, Christopher J. Bourne, Adam C. Rennie

Faculty of Engineering and Information Sciences - Papers: Part B

In order to study continuous models of disordered topological phases, we construct an unbounded Kasparov module and a semifinite spectral triple for the crossed product of a separable C∗-algebra by a twisted ℝd-action. The spectral triple allows us to employ the non-unital local index formula to obtain the higher Chern numbers in the continuous setting with complex observable algebra. In the case of the crossed product of a compact disorder space, the pairing can be extended to a larger algebra closely related to dynamical localisation, as in the tight-binding approximation. The Kasparov module allows us to exploit the Wiener-Hopf extension …

A Collaborative And Open Solution For Large-Scale Online Learning, Qingguo Zhou, Hongyu Sun, Rui Zhou, Geng Sun, Jun Shen, Kuan-Ching Li

Faculty of Engineering and Information Sciences - Papers: Part B

Collaborative Open Online Courses (COOC), designed as the enhanced variance of Massive Open Online Courses (MOOC), inherently combines the advantages of high-quality online resources and face-to-face classroom teaching. It stimulates the collaboration and improvement of courses between educators and learners, by realizing the innovation for dynamic and real-time education process, fostering professional skill acquisition and development as well. In this paper, we propose the novel concept and architectural design of COOC that provides the online course,courseware, and online experimental platform, built on top of third party's opensource platforms. The preparation of courses is based on GitHub that facilitatesmultipoint-to-multipoint online courses …

Spatially And Temporally Structured Global To Local Aggregation Of Dynamic Depth Information For Action Recognition, Yonghong Hou, Shuang Wang, Pichao Wang, Zhimin Gao, Wanqing Li

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents an effective yet simple video representation for RGB-D based action recognition. It proposes to represent a depth map sequence into three pairs of structured dynamic images at body, part and joint levels respectively through hierarchical bidirectional rank pooling. Different from previous works that applied one Convolutional Neural Network (ConvNet) for each part/joint separately, one pair of structured dynamic images is constructed from depth maps at each granularity level and serves as the input of a ConvNet. The structured dynamic image not only preserves the spatial-temporal information but also enhances the structure information across both body parts/joints and …

Human Action Segmentation Based On A Streaming Uniform Entropy Slice Method, Cheng Peng, Sio-Long Lo, Jie Huang, Ah Chung Tsoi

Faculty of Engineering and Information Sciences - Papers: Part B

Segmentation of human actions is a major research problem in video understanding. A number of existing approaches demonstrate that performing action segmentation before action recognition results in better recognition performance. In this paper, we address the problem of action segmentation in an online manner. We first extend the clustering-based image segmentation approach into a temporal one, where hierarchical supervoxel levels for action segmentation are generated accordingly. We then propose a streaming approach to flatten the hierarchical levels into one based on Uniform Entropy Slice (UES), in order to preserve important information in the video. The flattened level contains the silhouette …

Report Formatting In Laboratory Medicine - A Call For Harmony, Graham Jones, Michael Legg

Faculty of Engineering and Information Sciences - Papers: Part B

2018 Walter de Gruyter GmbH, Berlin/Boston 2018. The results of medical laboratory testing are only useful if they lead to appropriate actions by medical practitioners and/or patients. An underappreciated component of the medical testing process is the transfer of the information from the laboratory report into the reader's brain. The format of laboratory reports can be determined by the testing laboratory, which may issue a formatted report, or by electronic systems receiving information from laboratories and controlling the report format. As doctors can receive information from many laboratories, interpreting information from reports in a safe and rapid manner is facilitated …

Delivering Safe And Effective Test-Result Communication, Management And Follow-Up: A Mixed-Methods Study Protocol, Maria Dahm, Andrew Georgiou, Johanna Westbrook, David Greenfield, Andrea Horvath, Denis Wakefield, Ling Li, Ken Hillman, Patrick Bolton, Anthony Brown, Graham Jones, Robert Herkes, Robert Lindeman, Michael Legg, Meredith Makeham, Daniel Moses, Dauda Badmus, Craig Campbell, Rae-Anne Hardie, Julie Li, Euan Mccaughey, Gorkem Sezgin, Judith Thomas, Nasir Wabe

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Influence Of A Health Technology Assessment On The Use Of Pediatric Cochlear Implantation In Kazakhstan, Lyazzat Kosherbayeva, Aigul Medeulova, David M. Hailey, Lyudmila Yermukhanova, Raisa Uraz, Akmaral Aitmanbetova

Faculty of Engineering and Information Sciences - Papers: Part B

2018 Fellowship of Postgraduate Medicine Objective: To evaluate the influence of a health technology assessment (HTA) on pediatric cochlear implantation (CI) in Kazakhstan and to provide a further perspective on the use of the technology in that country. Ideally, children should be implanted as young as possible, have adequate rehabilitation, and be integrated into the regular school system. Methods: Administrative data for 2013-2016 relevant to pediatric CI in Kazakhstan were obtained from the Ministry of Health and from a survey of authorities in the 16 regions of the country. The data were compared with those for 2007-2012 used in preparation …

Mhealth Applications: A Tool For Behaviour Change In Weight Management, Elena Vlahu-Gjorgievska, Suparna Mulakaparambil Unnikrishnan, Khin Than Win

Faculty of Engineering and Information Sciences - Papers: Part B

Obesity has become a public concern all over the world and weight management is of interest to consumers. Heavy intake of food and lack of exercise are the foremost factors for obese condition. Self-management programs are essential for the prevention and treatment of obesity and weight management. Mobile health (m-Health) applications for weight management can be a useful tool in monitoring behaviour and self-management programs, thus engaging consumers in lifestyle changes to mitigate the risk of obesity. The aim of this review is to identify and compare the features supported in mHealth applications for weight management.

Effect Of Multi-Walled Carbon Nanotubes On The Cross-Linking Density Of The Poly(Glycerol Sebacate) Elastomeric Nanocomposites, Yi Yan, Vitor Sencadas, Tiantian Jin, Xu-Feng Huang, Wilford Lie, Dongbin Wei, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Processing conditions deeply affect the mechanical, chemical and biological properties of elastomeric based nanocomposites. In this work, multi-walled carbon nanotubes (MWCNTs) were dispersed in poly(glycerol sebacate) (PGS) prepolymer, followed by curing under vacuum at 120 °C. It was observed an increase of the water contact angle with the amount of MWCNTs added, as well as the tensile strength and Young modulus, without compromising the elastomeric behaviour of the pristine PGS matrix. The cross-linking degree was determined by the Flory-Rehner swelling method and through the mechanical rubber elasticity model, and an increase of more than six-fold was observed, which demonstrates the …

Contribution Of Early Nutrition On The Development Of Malnutrition And Allergic Diseases In The First Year Of Life: A Study Protocol For The Mother And Infant Cohort Study (Micos), Fui Chee Woon, Yit Siew Chin, Intan Hakimah Ismail, Yoke Mun Chan, Marijka Batterham, Amir Abdul, Wan Ying Gan, Geeta Appannah

Faculty of Engineering and Information Sciences - Papers: Part B

Background: Nutrition and environmental factors are essential for the education of the neonatal immune system. Epidemiological evidence has shown that malnutrition and allergic diseases that occur during early childhood share similar protective and risk factors. This paper describes the protocol of the Mother and Infant Cohort Study (MICOS), which aims to determine the contribution of early nutrition to the development of malnutrition and allergic diseases in infants' first year of life.

Methods: MICOS is a prospective cohort study conducted at selected government health clinics in two states, namely Selangor and Wilayah Persekutuan Kuala Lumpur, Malaysia. Women in their third trimester …

Use Of Trachea-Bronchial Swab Qpcr Testing To Confirm Mycoplasma Hyopneumoniae Seropositivity In An Spf Breeding Herd, Frederic Vangroenweghe, Eveline Willems, Jiri Malasek, Olivier Thas, Dominiek Maes

Faculty of Engineering and Information Sciences - Papers: Part B

Background: A dedicated program to monitor for freedom of several economically important diseases is present within most of the breeding companies that currently deliver high health breeding animals to their customers. Serology is therefore the preferential approach in order to screen for most of these diseases, including Mycoplasma hyopneumoniae (M. hyopneumoniae). However, in case of positive serology, further decisions on farm health status and the related consequences should be based on additional confirmation tests.

Case presentation: The current case report demonstrates that tracheo-bronchial swab (TBS) sampling is a suitable alternative to confirm a suspect M. hyopneumoniae-seropositive situation. A Central-European SPF …

Advances In Synthetic Gauge Fields For Light Through Dynamic Modulation, Daniel Hey, Enbang Li

Faculty of Engineering and Information Sciences - Papers: Part B

Photons are weak particles that do not directly couple to magnetic fields. However, it is possible to generate a photonic gauge field by breaking reciprocity such that the phase of light depends on its direction of propagation. This non-reciprocal phase indicates the presence of an effective magnetic field for the light itself. By suitable tailoring of this phase, it is possible to demonstrate quantum effects typically associated with electrons, and, as has been recently shown, non-trivial topological properties of light. This paper reviews dynamicmodulation as a process for breaking the time-reversal symm etry of light and generating a synthetic gauge …

Radiosensitisation Enhancement Effect Of Brudr And Ta2o5 Nsps In Combination With 5-Fluorouracil Antimetabolite In Kilovoltage And Megavoltage Radiation, Marjorie Mcdonald, Sianne Oktaria, Konstantin K. Konstantinov, Anatoly B. Rosenfeld, Michael L. F Lerch, Stephanie Corde, Moeava Tehei

Faculty of Engineering and Information Sciences - Papers: Part B

This article demonstrates in vitro a synergistic effect on 9L gliosarcoma cells when exposed to bromodeoxyuridine (BrUdR) and a low concentration (100 times lower than the IC50) of 5-Fluorouracil (5-FU), in combination with x-ray irradiation. The synergy is brought about by several important factors including the x-ray beam energy, atomic number of the BrUdR (Z = 35), effectiveness of 5-FU in reducing the available repair processes and distribution of the BrUdR in and around the 9L cells (32% of the total substitution of BrUdR for thymidine into nucleus DNA). Our results show that the synergistic effect, evident in an optimised …

The Impact Of Contour Variation On Tumour Control Probability In Anal Cancer, Michael Jones, Jarad Martin, Kerwyn Y. Foo, Patrick Estoesta, Lois C. Holloway, Michael Jameson

Faculty of Engineering and Information Sciences - Papers: Part B

Background: While intensity modulated radiotherapy (IMRT) has been widely adopted for the treatment of anal cancer (AC), the added contour complexity poses potential risks. This study investigates the impact of contour variation on tumour control probability (TCP) when using IMRT for AC. Methods: Nine Australian centres contoured a single computed tomography dataset of a patient with AC. The same optimised template-based IMRT planning protocol was applied to each contour set to generate nine representative treatment plans and their corresponding dose volume histograms. A geometric analysis was performed on all contours. The TCP was calculated for each plan using the linear …

Thulium Oxide Nanoparticles: A New Candidate For Image-Guided Radiotherapy, Elette Engels, Matt Westlake, Nan Li, Sarah Vogel, Quentin Gobert, Nathan Thorpe, Anatoly B. Rosenfeld, Michael L. F Lerch, Stephanie Corde, Moeava Tehei

Faculty of Engineering and Information Sciences - Papers: Part B

Nanoparticles, with their distinct properties that vary from their bulk material equivalent, continue to gain popularity for studies into multi-modal applications in medicine. This research introduces the use of thulium oxide nanoparticles for biological applications and characterizes the potential of this novel nanoparticle for image-guided radiotherapy of brain cancer. In this study, we investigate the structural characteristics of this nanoparticle, and reveal a significant dose enhancement towards radioresistant brain tumour cells in vitro that also underlies an improvement in the CT image contrast of brain tumours in vivo. The thulium oxide nanoparticles utilized in the investigations described in this …

Calculation Analysis Of Yaw Bearings With A Hardened Raceway, Peiyu He, Rongjing Hong, Hua Wang, Xu Ji, Cheng Lu

Faculty of Engineering and Information Sciences - Papers: Part B

The yaw bearing is a key support structure of wind turbines and is often exposed to substantial complex loads that cause damage and fatigue failure. Raceway surfaces accommodate high contact stress and require a hardening treatment. The hardened depth has a great influence on both the carrying capacity and fatigue life. We establish a whole finite element model of a yaw bearing and use non-linear springs instead of a ball to obtain the maximum contact load. The results of a strain gauge experiment and an empirical formula are compared to verify the spring model results. A local finite element model …

Interface Bond Performance Of Steel Fibre Embedded In Magnesium Phosphate Cementitious Composite, Hu Feng, M Neaz Sheikh, Muhammad N. S Hadi, Lu Feng, Danying Gao, Jun Zhao

Faculty of Engineering and Information Sciences - Papers: Part B

A series of pullout tests were carried out to characterize the interface bond between steel fibre and magnesium phosphate cement (MPC) based matrix. The effect of the mixture proportions, curing time and end-hook of fibre on the interface bond properties between the steel fibre and the MPC-based matrix was investigated. The mixture proportions investigated include the mole ratio of magnesium oxide to potassium dihydrogen phosphate, mass ratio of sand to cement, mass ratio of water to cement and dosage of silica fume. The effect of different types of cement on the interface bond properties was also investigated.

Analysis Of Energy Accumulation And Dissipation Of Coal Bursts, Xiaohan Yang, Ting X. Ren, Alex M. Remennikov, Xueqiu He, Lihai Tan

Faculty of Engineering and Information Sciences - Papers: Part B

Coal bursts are a serious dynamic hazard for underground coalmines, and they attract the extensive interest of studies from mining and geotechnical researchers worldwide. More recently, coal-burst incidents were reported in some Australian coalmines as a result of inadequate geological assessment of coal-burst hazards. The coal-burst process is closely associated with the accumulation of elastic energy and the rapid dissipation of kinetic energy. This paper introduces the essential geological conditions for energy accumulation, and the likely precursors for rapid energy dissipation leading to coal burst, which can be used by Australian coalmines to determine their coal-burst risk accordingly. Different energy …

A Numerical Approach To Model Biodegradable Vertical Drains, Thanh Trung Nguyen, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

Because of their distinct features such as biodegradability and favourable engineering properties, naturally occurring materials including jute and coconut fibres have been used increasingly in numerous geoengineering applications in recent years. However, these materials can sometimes decompose rapidly when subjected to adverse environmental conditions, resulting in severe degradation of their engineering characteristics and consequently causing damage to the design target. This paper presents a numerical approach where the finite-element method (FEM) is used to estimate the influence that the degradation of natural fibre drains can have on soil consolidation. A subroutine which can describe the reduction in drain discharge capacity …

Impact Of Simultaneous Retention Of Micropollutants And Laccase On Micropollutant Degradation In Enzymatic Membrane Bioreactor, Muhammad Bilal Asif, Faisal I. Hai, Bipro R. Dhar, Hao H. Ngo, Wenshan Guo, Veeriah Jegatheesan, William E. Price, Long D. Nghiem, Kazuo Yamamoto

Faculty of Engineering and Information Sciences - Papers: Part B

This study systematically compares the performance of ultrafiltration (UF) and nanofiltration (NF) based enzymatic membrane bioreactors (EMBRs) for the degradation of five micropollutants, namely atrazine, carbamazepine, sulfamethoxazole, diclofenac and oxybenzone to elucidate the impact of effective membrane retention of micropollutants on their degradation. Based on the permeate quality, NF-EMBR achieved 92-99.9% micropollutant removal (i.e., biodegradation + membrane retention), while the removal of these micropollutants by UF-EMBR varied from 20 to 85%. Mass balance analysis revealed that micropollutant degradation was improved by 15-30% in NF-EMBR as compared to UF-EMBR, which could be attributed to the prolonged contact time between laccase and …

Parameter Measurement Of Biaxial Braided Composite Preform Based On Phase Congruency, Zhitao Xiao, Lei Pei, Fang Zhang, Ying Sun, Lei Geng, Jun Wu, Jun Tong

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, a new method based on phase congruency is proposed to measure pitch lengths and surface braiding angles of two-dimensional biaxial braided composite preforms. Lab space transform and BM3D (block-matching and 3D filter) are used first to preprocess the original acquired images. A corner detection algorithm based on phase congruency is then proposed to detect the corners of the preprocessed images. Pitch lengths and surface braiding angles are finally measured based on the detected corner maps. Experimental results show that our method achieves the automatic measurement of pitch lengths and the surface braiding angles of biaxial braided composite …

Control Of A Multiple-Dof Vehicle Seat Suspension With Roll And Vertical Vibration, Donghong Ning, Shuaishuai Sun, Haiping Du, Weihua Li, Wenxing Li

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, the control of roll vibration and vertical vibration of a seat suspension caused by uneven road under both sides of tyres is studied. The heavy duty vehicles are generally working under severe conditions, where the uneven road can cause roll vibration and vertical vibration of the vehicle body and can have an effect on seat suspension. The conventional single-degree of freedom (single-DOF) seat suspension can only isolate the vertical vibration while the roll vibration will be totally transferred to the driver's body. The high magnitude of driver body's lateral acceleration caused by roll vibration will influence drivers' …

Axial Load-Axial Deformation Behaviour Of Scc Columns Reinforced With Steel Tubes, Faez Alhussainy, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

A simplified analytical model has been developed for the axial load-axial deformation behaviour of self-compacting concrete (SCC) columns reinforced with steel tubes. The developed analytical model takes into account the contribution of the steel tubes, unconfined concrete cover, confined concrete core and confined concrete inside the steel tube. The results of the analytical model have been compared with experimental results of four SCC column specimens. The results of the analytical model are in good agreement with the experimental results. A parametric study has been conducted to investigate the influences of the compressive strength of SCC, tensile strength of steel tube, …