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Articles 2641 - 2670 of 14358

Full-Text Articles in Social and Behavioral Sciences

Evaluation Of Fertilizer-Drawn Forward Osmosis For Coal Seam Gas Reverse Osmosis Brine Treatment And Sustainable Agricultural Reuse, Youngjin Kim, Yun Chul Woo, Sherub Phuntsho, Long D. Nghiem, Ho Kyong Shon, Seungkwan Hong Jan 2017

Evaluation Of Fertilizer-Drawn Forward Osmosis For Coal Seam Gas Reverse Osmosis Brine Treatment And Sustainable Agricultural Reuse, Youngjin Kim, Yun Chul Woo, Sherub Phuntsho, Long D. Nghiem, Ho Kyong Shon, Seungkwan Hong

Faculty of Engineering and Information Sciences - Papers: Part B

The fertilizer-drawn forward osmosis (FDFO) was investigated for treating coal seam gas (CSG) produced water to generate nutrient rich solution for irrigation. Its performance was evaluated and compared with reverse osmosis (RO) in terms of specific energy consumption (SEC) and nutrient concentrations in the final product water. The RO-FDFO hybrid process was developed to further improve FDFO. The results showed that FDFO has the lowest SEC followed by the RO-FDFO and RO processes. The final nutrient concentration simulation demonstrated that the RO-FDFO hybrid process has lower final concentration, higher maximum recovery and lower nutrient loss than the stand alone FDFO …

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Improved Performance Of Ballasted Rail Tracks Using Plastics And Rubber Inclusions, Buddhima Indraratna, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn Jan 2017

Improved Performance Of Ballasted Rail Tracks Using Plastics And Rubber Inclusions, Buddhima Indraratna, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

Current railroads require significant upgrading to meet the challenges of heavier loads at higher speeds. Due to excessive track degradation, the Australian rail industry spends large amounts on frequent track repair and maintenance, as well as ground improvement prior to track construction where soft and saturated subgrade soils pose considerable difficulties in design and construction. Moreover, the degradation of ballast particles under impact loading seriously hampers the safety and efficiency of rail tracks, which leads to speed restrictions and more frequent track upgrading. Hence, there is a need for innovative design solutions that can extend the service life of tracks …

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Performance Assessment Of Geocell-Reinforced Subballast: Modeling And Design Implications, Ngoc Trung Ngo, Buddhima Indraratna, Michael Biabani Jan 2017

Performance Assessment Of Geocell-Reinforced Subballast: Modeling And Design Implications, Ngoc Trung Ngo, Buddhima Indraratna, Michael Biabani

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents a study of the load-deformation behavior of geocell-stabilised subballast subjected to cyclic loads using a large-scale track process simulation apparatus and numerical modelling. The tests and numerical simulations were conducted to mimic the actual track conditions. Subjected to a given frequency and cyclic loads the predicted load-deformation behavior of the subballast with and without geocell inclusions match reasonably with those measured in the laboratory, and show that geocell could effectively decrease the lateral and axial deformations of the reinforced subballast. The results also provide an insight to design of rail tracks capturing the roles of geocell in …

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Behaviour Of Small Diameter Steel Tubes Under Axial Compression, Faez Alhussainy, M Neaz Sheikh, Muhammad N. S Hadi Jan 2017

Behaviour Of Small Diameter Steel Tubes Under Axial Compression, Faez Alhussainy, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Small diameter steel tubes are used in many civil engineering applications. Recently, the behaviour of concrete columns reinforced with small diameter steel tubes was experimentally and analytically investigated. This study explores the effect of unsupported length to the outside diameter (L/D) ratio on the axial compressive behaviour of small diameter steel tubes, which has not yet been adequately investigated. Galvanized and cold-formed steel tube specimens with L/D ratio of 2 to 12 were tested. It was observed that for specimens with L/D ratio of 2 and 4, the compressive failure occurred due to local elephant's foot buckling. However, the …

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Numerical Investigation Of Acoustic Emission Events Of Argillaceous Sandstones Under Confining Pressure, Zhaohui Chong, Xuehua Li, Jingzheng Lu, Tian Chen, Ji Zhang, Xiangyu Chen Jan 2017

Numerical Investigation Of Acoustic Emission Events Of Argillaceous Sandstones Under Confining Pressure, Zhaohui Chong, Xuehua Li, Jingzheng Lu, Tian Chen, Ji Zhang, Xiangyu Chen

Faculty of Engineering and Information Sciences - Papers: Part B

At the laboratory scale, locating acoustic emission (AE) events is a comparatively mature method for evaluating cracks in rock materials, and the method plays an important role in numerical simulations. This study is aimed at developing a quantitative method for the measurement of acoustic emission (AE) events in numerical simulations. Furthermore, this method was applied to estimate the crack initiation, propagation, and coalescence in rock materials. The discrete element method-acoustic emission model (DEM-AE model) was developed using an independent subprogram. This model was designed to calculate the scalar seismic tensor of particles in the process of movement and further to …

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Microbial Fuel Cell Is Emerging As A Versatile Technology: A Review On Its Possible Applications, Challenges And Strategies To Improve The Performances, Ravinder Kumar, Lakhveer Singh, A W. Zularisam, Faisal I. Hai Jan 2017

Microbial Fuel Cell Is Emerging As A Versatile Technology: A Review On Its Possible Applications, Challenges And Strategies To Improve The Performances, Ravinder Kumar, Lakhveer Singh, A W. Zularisam, Faisal I. Hai

Faculty of Engineering and Information Sciences - Papers: Part B

Microbial fuel cells (MFCs) are emerging as a versatile renewable energy technology. This is particularly because of themultidimensional applications of this eco-friendly technology. The technology depends on the electroactive bacteria,popularly known as exoelectrogens, to simultaneously produce electric power and treat wastewater. Electrodemodifications with nanomaterials such as gold nanoparticles and iron oxide nanoparticles or pretreatment methods suchas sonication and autoclave sterilization have shown promising results in enhancing MFC performance for electricitygeneration and wastewater treatment. The MFC technology has been also investigated for the removal of various heavymetals and toxic elements, and to detect the presence of toxic elements in wastewater. In …

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A Framework For Geotechnical Hazard Analysis In Highwall Mining Entries, Marc Elmouttie, Shivakumar Karekal Jan 2017

A Framework For Geotechnical Hazard Analysis In Highwall Mining Entries, Marc Elmouttie, Shivakumar Karekal

Faculty of Engineering and Information Sciences - Papers: Part B

Highwall mining involves driving a series of parallel entries with web pillars in between. These entries are driven by using a continuous miner with attached conveying system to extract locked up coal behind the highwall slope when the open cut coal mine reaches its ultimate limit. These entries are driven unmanned, unventilated and unsupported. Therefore, a detailed knowledge of structural features ahead of operations is essential in assessing the stability of these entries. Highwall mining operations can greatly benefit from accurate structural mapping of rock mass defects. The stability of these entries can be suitably assessed for any major roof …

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Impact Of Wastewater Derived Dissolved Interfering Compounds On Growth, Enzymatic Activity And Trace Organic Contaminant Removal Of White Rot Fungi - A Critical Review, Muhammad Bilal Asif, Faisal I. Hai, Jingwei Hou, William E. Price, Long D. Nghiem Jan 2017

Impact Of Wastewater Derived Dissolved Interfering Compounds On Growth, Enzymatic Activity And Trace Organic Contaminant Removal Of White Rot Fungi - A Critical Review, Muhammad Bilal Asif, Faisal I. Hai, Jingwei Hou, William E. Price, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part B

White-rot fungi (WRF) and their ligninolytic enzymes have been investigated for the removal of a broad spectrum of trace organic contaminants (TrOCs) mostly from synthetic wastewater in lab-scale experiments. Only a few studies have reported the efficiency of such systems for the removal of TrOCs from real wastewater. Wastewater derived organic and inorganic compounds can inhibit: (i) WRF growth and their enzyme production capacity; (ii) enzymatic activity of ligninolytic enzymes; and (iii) catalytic efficiency of both WRF and enzymes. It is observed that essential metals such as Cu, Mn and Co at trace concertation (up to 1 mM) can improve …

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Flow Rate-Insensitive Microparticle Separation And Filtration Using A Microchannel With Arc-Shaped Groove Arrays, Qianbin Zhao, Dan Yuan, Sheng Yan, Jun Zhang, Haiping Du, Gursel Alici, Weihua Li Jan 2017

Flow Rate-Insensitive Microparticle Separation And Filtration Using A Microchannel With Arc-Shaped Groove Arrays, Qianbin Zhao, Dan Yuan, Sheng Yan, Jun Zhang, Haiping Du, Gursel Alici, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

Inertial microfluidics can separate microparticles in a continuous and high-throughput manner, and is very promising for a wide range of industrial, biomedical and clinical applications. However, most of the proposed inertial microfluidic devices only work effectively at a limited and narrow flow rate range because the performance of inertial particle focusing and separation is normally very sensitive to the flow rate (Reynolds number). In this work, an innovative particle separation method is proposed and developed by taking advantage of the secondary flow and particle inertial lift force in a straight channel (AR = 0.2) with arc-shaped groove arrays patterned on …

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Indoor Air Temperature And Agitation Of Nursing Home Residents With Dementia, Federico Tartarini, Paul Cooper, Richard Fleming, Marijka Batterham Jan 2017

Indoor Air Temperature And Agitation Of Nursing Home Residents With Dementia, Federico Tartarini, Paul Cooper, Richard Fleming, Marijka Batterham

Faculty of Engineering and Information Sciences - Papers: Part B

This study aimed to determine the specific correlation between indoor air temperature and agitation of nursing home residents with dementia. Agitated behaviors of 21 residents, living in 1 nursing home, were assessed for a 10-month period using the Cohen-Mansfield Agitation Inventory (CMAI). The CMAI Total Frequency scores were found to increase significantly when indoor average temperatures deviated from 22.6°C. In addition, cumulative exposure to temperatures higher than 26°C and lower than 20°C was linearly correlated with CMAI Total Frequency scores. Results showed that agitated behaviors not only affected the person manifesting them but were found to be disruptive for other …

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Site-Specific Atomic-Scale Characterisation Of Retained Austenite In A Strip Cast Trip Steel, Zhiping Xiong, Ahmed A. Saleh, Ross Marceau, A S. Taylor, N E. Stanford, Andrii Kostryzhev, Elena V. Pereloma Jan 2017

Site-Specific Atomic-Scale Characterisation Of Retained Austenite In A Strip Cast Trip Steel, Zhiping Xiong, Ahmed A. Saleh, Ross Marceau, A S. Taylor, N E. Stanford, Andrii Kostryzhev, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

Knowledge of carbon content in retained austenite (RA) with different neighbouring phases is essential to understand the chemical stability of RA, which is useful for microstructure tuning of transformation-induced plasticity (TRIP) steels. The present study investigates different morphologies and chemical compositions of RA by correlating electron backscattering diffraction, transmission electron microscopy and atom probe tomography. The effect of neighbouring phases, such as polygonal ferrite, bainitic ferrite lath, ferrite in granular bainite and carbides, on the carbon content in the RA is investigated. The results reveal that the film RA morphology does not always have a higher carbon content than the …

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Behaviour Of Concrete-Encased Concrete-Filled Frp Tube (Ccft) Columns Under Axial Compression, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi, Danying Gao, Gang Chen Jan 2017

Behaviour Of Concrete-Encased Concrete-Filled Frp Tube (Ccft) Columns Under Axial Compression, Weiqiang Wang, M Neaz Sheikh, Muhammad N. S Hadi, Danying Gao, Gang Chen

Faculty of Engineering and Information Sciences - Papers: Part B

A new composite column named concrete-encased concrete-filled fibre reinforced polymer tube (CCFT) column has been proposed in this study. This composite column consists of an inner concrete-filled fibre reinforced polymer (FRP) tube, outer concrete confined with polymer grid, and concrete cover. In this study, a total of 16 concrete stub columns were cast and tested under axial compression. Columns were divided into eight groups, which included one group of plain concrete columns, two groups of FRP confined concrete columns, and five groups of CCFT columns. For FRP confined concrete columns, one layer and two layers of carbon FRP (CFRP) sheet …

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Greenhouse Gas Emissions From Different Pig Manure Management Techniques: A Critical Analysis, Conor Dennehy, Peadar G. Lawlor, Yan Jiang, Gillian Gardiner, Sihuang Xie, Long D. Nghiem, Xinmin Zhan Jan 2017

Greenhouse Gas Emissions From Different Pig Manure Management Techniques: A Critical Analysis, Conor Dennehy, Peadar G. Lawlor, Yan Jiang, Gillian Gardiner, Sihuang Xie, Long D. Nghiem, Xinmin Zhan

Faculty of Engineering and Information Sciences - Papers: Part B

Manure management is the primary source of greenhouse gas (GHG) emissions from pig farming, which in turn accounts for 18% of the total global GHG emissions from the livestock industry. In this review, GHG emissions (N2O and CH4 emissions in particular) from individual pig manure (PGM) management practices (European practises in particular) are systematically analyzed and discussed. These manure management practices include manure storage, land application, solid/liquid separation, anaerobic digestion, composting and aerobic wastewater treatment. The potential reduction in net GHG emissions by changing and optimising these techniques is assessed. This review also identifies key research gaps …

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Exploration Of An Innovative Draw Solution For A Forward Osmosis-Membrane Distillation Desalination Process, Nguyen Cong Nguyen, Shiao-Shing Chen, Shubham Jain, Hau Thi Nguyen, Saikat Sinha Ray, Hao H. Ngo, Wenshan Guo, Ngoc Tuan Lam, Hung Duong Jan 2017

Exploration Of An Innovative Draw Solution For A Forward Osmosis-Membrane Distillation Desalination Process, Nguyen Cong Nguyen, Shiao-Shing Chen, Shubham Jain, Hau Thi Nguyen, Saikat Sinha Ray, Hao H. Ngo, Wenshan Guo, Ngoc Tuan Lam, Hung Duong

Faculty of Engineering and Information Sciences - Papers: Part B

Forward osmosis (FO) has emerged as a viable technology to alleviate the global water crisis. The greatest challenge facing the application of FO technology is the lack of an ideal draw solution with high water flux and low reverse salt flux. Hence, the objective of this study was to enhance FO by lowering reverse salt flux and maintaining high water flux; the method involved adding small concentrations of Al2(SO4)3 to a MgCl2 draw solution. Results showed that 0.5 M MgCl2 mixed with 0.05 M of Al2(SO4)3 at pH …

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Constraining The Mass Balance Of East Antarctica, Alba Martin-Espanol, Jonathan Bamber, Andrew Zammit-Mangion Jan 2017

Constraining The Mass Balance Of East Antarctica, Alba Martin-Espanol, Jonathan Bamber, Andrew Zammit-Mangion

Faculty of Engineering and Information Sciences - Papers: Part B

We investigate the mass balance of East Antarctica for the period 2003-2013 using a Bayesian statistical framework. We combine satellite altimetry, gravimetry, and GPS with prior assumptions characterizing the underlying geophysical processes. We run three experiments based on two different assumptions to study possible solutions to the mass balance. We solve for trends in surface mass balance, ice dynamics, and glacial isostatic adjustment. The first assumption assigns low probability to ice dynamic mass loss in regions of slow flow, giving a mean dynamic trend of 17 ± 10 Gt yr-1 and a total mass imbalance of 57 ± 20 Gt …

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Vanishing Fourier Coefficients And The Expression Of Functions In L2(T) As Sums Of Generalised Differences, Rodney Nillsen Jan 2017

Vanishing Fourier Coefficients And The Expression Of Functions In L2(T) As Sums Of Generalised Differences, Rodney Nillsen

Faculty of Engineering and Information Sciences - Papers: Part B

If g∈L2([0,2π])g∈L2([0,2π]) let View the MathML sourcegˆ be the sequence of Fourier coefficients of g, let D denote differentiation and let I denote the identity operator. Given α,β∈Zα,β∈Z, we consider the operator D2−i(α+β)D−αβID2−i(α+β)D−αβI on the second order Sobolev space of L2([0,2π])L2([0,2π]). The multiplier of this operator is −(n−α)(n−β)−(n−α)(n−β) considered as a function of n∈Zn∈Z, so that View the MathML sourcegˆ(α)=gˆ(β)=0 for any function g in the range of the operator. Let δxδx denote the Dirac measure at x , and let ⁎ denote convolution. If b∈[0,2π]b∈[0,2π] let λbλb be the measure 2−1[(eib(α−β2)+e−ib(α−β2)]δ0−2−1[(eib(α+β2)δb+e−ib(α+β2)δ−b] A function of the form λb⁎fλb⁎f is called …

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Trucks Are Destroying Our Roads And Not Picking Up The Repair Cost, Philip G. Laird Jan 2017

Trucks Are Destroying Our Roads And Not Picking Up The Repair Cost, Philip G. Laird

Faculty of Engineering and Information Sciences - Papers: Part B

It's high time Australia changed its current road user charges for trucks. The shortfall between the charges for heavy vehicles and the money spent on things like road system maintenance, construction costs, road crashes involving heavy trucks, emissions, pollution and urban road congestion amounts to a taxpayer subsidy for the industry of at least A$3 billion per annum. The current charges, like those of cars, rely only on annual registration fees and fuel taxation. Instead Australia should be following the lead of New Zealand, Switzerland and some other European countries and introducing a charge system based on mass and distance. …

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Osmotic Membrane Bioreactors For Wastewater Reuse: Performance Comparison Between Cellulose Triacetate And Polyamide Thin Film Composite Membranes, Bangxi Zhang, Xiaoye Song, Long D. Nghiem, Guoxue Li, Wenhai Luo Jan 2017

Osmotic Membrane Bioreactors For Wastewater Reuse: Performance Comparison Between Cellulose Triacetate And Polyamide Thin Film Composite Membranes, Bangxi Zhang, Xiaoye Song, Long D. Nghiem, Guoxue Li, Wenhai Luo

Faculty of Engineering and Information Sciences - Papers: Part B

This study compared the performance of the asymmetric cellulose triacetate (CTA) and polyamide thin film composite (TFC) forward osmosis (FO) membranes in an osmotic membrane bioreactor (OMBR). A reverse osmosis (RO) system was integrated with OMBR to regenerate the draw solution and produce clean water. Results show that the TFC membrane exhibited a higher initial water flux but more dramatic flux decline compared to the CTA membrane when they were used for OMBR. The CTA and TFC membranes also resulted in discernible difference in salinity build-up in the bioreactor and thus biomass characteristics during OMBR operation. All 30 trace organic …

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Residual Factor As A Variable In Slope Reliability Analysis, Gautam Bhattacharya, Robin N. Chowdhury, Subhadeep Metya Jan 2017

Residual Factor As A Variable In Slope Reliability Analysis, Gautam Bhattacharya, Robin N. Chowdhury, Subhadeep Metya

Faculty of Engineering and Information Sciences - Papers: Part B

In the past, residual factor R in strain-softening soil slopes has been included, either directly or indirectly, as a deterministic variable in both deterministic and probabilistic studies. This paper discusses the uncertainties associated with R and outlines a systematic approach for the reliability analysis of a natural slope in which shear strength parameters and pore pressure ratio are random variables, each assumed with a lognormal probability distribution. For the residual factor R, seven probability distribution options under the generalized beta-distribution system are considered. Slope reliability is computed based on the first order reliability method (FORM) and validated against Monte-Carlo simulation …

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Analysis Of A Compact Annular-Radial-Orifice Flow Magnetorheological Valve And Evaluation Of Its Performance, Guoliang Hu, Mingke Liao, Weihua Li Jan 2017

Analysis Of A Compact Annular-Radial-Orifice Flow Magnetorheological Valve And Evaluation Of Its Performance, Guoliang Hu, Mingke Liao, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

This article outlines a compact annular-radial-orifice flow magnetorheological valve through theoretical calculation, simulation analysis and experiment verification. The fluid flow paths of this proposed magnetorheological valve consist of a single annular flow channel, a single radial flow channel and an orifice flow channel through structural design. The finite element modelling and analysis of the magnetorheological valve was carried out using ANSYS/Emag software, including achieving optimal magnetic field distribution and yield stress in the annular flow path and radial flow path, respectively. Moreover, this proposed magnetorheological valve was prototyped and evaluated experimentally, showing that the magnetorheological valve has significantly improved its …

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Multifunctional Plla-Ceramic Fiber Membranes For Bone Regeneration Applications, Daniel Santos, Dina M. Silva, Pedro S. Gomes, Maria H. Fernandes, Jose Oliveira-Santos, Vitor Sencadas Jan 2017

Multifunctional Plla-Ceramic Fiber Membranes For Bone Regeneration Applications, Daniel Santos, Dina M. Silva, Pedro S. Gomes, Maria H. Fernandes, Jose Oliveira-Santos, Vitor Sencadas

Faculty of Engineering and Information Sciences - Papers: Part B

A novel method to process electrospun poly(l-lactic acid) (PLLA) membranes incorporating glass reinforced hydroxyapatite granules (gHA) interspacially between the polymeric fibers is reported, thus increasing the surface area for cellular interactions. gHA granules (≤150 μm) electrospun together with the polymer solution, lead to an average fiber diameter of 550 ± 150 nm for pristine PLLA and 440 ± 170 nm for the composite samples. An increase of the overall porosity was observed, from 79 ± 3% for the PLLA up to 88 ± 5% for the hybrid samples, keeping material’s wettability and mechanical properties. Bone-bonding ability showed that both samples …

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The Effect Of Cooling Rate And Coiling Temperature On The Niobium Retention In Ultra-Thin Cast Strip Steel, Zhizhang Wang, Kristin R. Carpenter, Zhixin Chen, Chris R. Killmore Jan 2017

The Effect Of Cooling Rate And Coiling Temperature On The Niobium Retention In Ultra-Thin Cast Strip Steel, Zhizhang Wang, Kristin R. Carpenter, Zhixin Chen, Chris R. Killmore

Faculty of Engineering and Information Sciences - Papers: Part B

This laboratory study utilised a dilatometer to simulate the run-out table cooling rate and the coiling temperature to investigate the effect of the cooling rate and simulated coiling conditions on the age hardening response of a niobium microalloyed Ultra-thin Cast Strip (UCS®) steel, produced by the CASTRIP® Process. Three cooling rates of 1, 5 and 40 °C/s, covering very slow (1 °C/s) to typical run-out table cooling rates (40 °C/s), down to two coiling temperatures of 500 and 675 °C were used. Dilatation curves were used to determine the temperature range over which the ¿-¿ phase transformations …

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On The Energy Efficiency Of Adaptive Wban Systems For Mhealth Services, Miftadi Sudjai, Le Chung Tran, Farzad Safaei Jan 2017

On The Energy Efficiency Of Adaptive Wban Systems For Mhealth Services, Miftadi Sudjai, Le Chung Tran, Farzad Safaei

Faculty of Engineering and Information Sciences - Papers: Part B

We recently proposed an adaptive Wireless Body Area Network (WBAN) system for mHealth service, which shows better bit error performance compared to the non-adaptive one. However, analysis and maximization of the energy efficiency as one of the key design considerations of these networks remain an open problem. Therefore, this paper investigates the energy efficiency of the proposed adaptive WBAN system by considering both the transmission power and the power consumed in the circuitry which consists of rate-independent and rate-dependent components. Since the distance between the hub and the wireless access point in WBAN is relatively short, beside the transmission power, …

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A Study Of The Geogrid-Subballast Interface Via Experimental Evaluation And Discrete Element Modelling, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn Jan 2017

A Study Of The Geogrid-Subballast Interface Via Experimental Evaluation And Discrete Element Modelling, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents a study of the interface of geogrid reinforced subballast through a series of large-scale direct shear tests and discrete element modelling. Direct shear tests were carried out for subballast with and without geogrid inclusions under varying normal stresses of σn = 6.7 to 45 kPa. Numerical modelling with three-dimensional discrete element method (DEM) was used to study the shear behaviour of the interface of subballast reinforced by geogrids. In this study, groups of 25-50 spherical balls are clumped together in appropriate sizes to simulate angular subballast grains, while the geogrid is modelled by bonding small spheres …

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The Geometric Triharmonic Heat Flow Of Immersed Surfaces Near Spheres, James A. Mccoy, Scott Parkins, Glen Wheeler Jan 2017

The Geometric Triharmonic Heat Flow Of Immersed Surfaces Near Spheres, James A. Mccoy, Scott Parkins, Glen Wheeler

Faculty of Engineering and Information Sciences - Papers: Part B

We consider closed immersed surfaces in R^3 evolving by the geometric triharmonic heat flow. Using local energy estimates, we prove interior estimates and a positive absolute lower bound on the lifespan of solutions depending solely on the local concentration of curvature of the initial immersion in L^2. We further use an {\epsilon}-regularity type result to prove a gap lemma for stationary solutions. Using a monotonicity argument, we then prove that a blowup of the flow approaching a singular time is asymptotic to a non-umbilic embedded stationary surface. This allows us to conclude that any solution with initial L^2-norm of the …

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Visual Authentication Based On Visual Cryptography Using Mobile Devices, Yang-Wai Chow, Willy Susilo, Man Ho Au, Ari Moesriami Barmawi Jan 2017

Visual Authentication Based On Visual Cryptography Using Mobile Devices, Yang-Wai Chow, Willy Susilo, Man Ho Au, Ari Moesriami Barmawi

Faculty of Engineering and Information Sciences - Papers: Part B

Authentication refers to the process of confirming the identity of the authenticating entity. The use of passwords for user authentication has become ubiquitous in our everyday lives. Despite its wide-spread usage, password-based authentication has numerous deficiencies. For instance, password theft is becoming a common occurrence due to a variety of security problems associated with passwords.As such, many organizations are moving towards adopting alternative solutions like one-time passwords, which are only valid for a single session. Nevertheless, various one-time password schemes also suffer from a number of drawbacks in terms of their method of generation or delivery. In this chapter, we …

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Ontological Learner Profile Identification For Cold Start Problem In Micro Learning Resources Delivery, Geng Sun, Tingru Cui, Jun Shen, Dongming Xu, Ghassan Beydoun, Shiping Chen Jan 2017

Ontological Learner Profile Identification For Cold Start Problem In Micro Learning Resources Delivery, Geng Sun, Tingru Cui, Jun Shen, Dongming Xu, Ghassan Beydoun, Shiping Chen

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

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Leveraging Stacked Denoising Autoencoder In Prediction Of Pathogen-Host Protein-Protein Interactions, Huaming Chen, Jun Shen, Lei Wang, Jiangning Song Jan 2017

Leveraging Stacked Denoising Autoencoder In Prediction Of Pathogen-Host Protein-Protein Interactions, Huaming Chen, Jun Shen, Lei Wang, Jiangning Song

Faculty of Engineering and Information Sciences - Papers: Part B

In big data research related to bioinformatics, one of the most critical areas is proteomics. In this paper, we focus on the protein-protein interactions, especially on pathogen-host protein-protein interactions (PHPPIs), which reveals the critical molecular process in biology. Conventionally, biologists apply in-lab methods, including small-scale biochemical, biophysical, genetic experiments and large-scale experiment methods (e.g. yeast-two-hybrid analysis), to identify the interactions. These in-lab methods are time consuming and labor intensive. Since the interactions between proteins from different species play very critical roles for both the infectious diseases and drug design, the motivation behind this study is to provide a basic framework …

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Towards Massive Data And Sparse Data In Adaptive Micro Open Educational Resource Recommendation: A Study On Semantic Knowledge Base Construction And Cold Start Problem, Geng Sun, Tingru Cui, Ghassan Beydoun, Shiping Chen, Fang Dong, Dongming Xu, Jun Shen Jan 2017

Towards Massive Data And Sparse Data In Adaptive Micro Open Educational Resource Recommendation: A Study On Semantic Knowledge Base Construction And Cold Start Problem, Geng Sun, Tingru Cui, Ghassan Beydoun, Shiping Chen, Fang Dong, Dongming Xu, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

Micro Learning through open educational resources (OERs) is becoming increasingly popular. However, adaptive micro learning support remains inadequate by current OER platforms. To address this, our smart system, Micro Learning as a Service (MLaaS), aims to deliver personalized OER with micro learning to satisfy their real-time needs.

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Cost-Effective Big Data Mining In The Cloud: A Case Study With K-Means, Qiang He, Xiaodong Zhu, Dongwei Li, Shuliang Wang, Jun Shen, Yun Yang Jan 2017

Cost-Effective Big Data Mining In The Cloud: A Case Study With K-Means, Qiang He, Xiaodong Zhu, Dongwei Li, Shuliang Wang, Jun Shen, Yun Yang

Faculty of Engineering and Information Sciences - Papers: Part B

Mining big data often requires tremendous computationalresources. This has become a major obstacle to broad applicationsof big data analytics. Cloud computing allows data scientists to access computationalresources on-demand for building their big data analytics solutions in the cloud.

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