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Articles 421 - 450 of 2936
Full-Text Articles in Social and Behavioral Sciences
Analytical Solution And Numerical Simulation Of Vacuum Consolidation By Vertical Drains Beneath Circular Embankments, Buddhima Indraratna, Mojtaba E. Kan, David Potts, Cholachat Rujikiatkamjorn, Scott W. Sloan
Analytical Solution And Numerical Simulation Of Vacuum Consolidation By Vertical Drains Beneath Circular Embankments, Buddhima Indraratna, Mojtaba E. Kan, David Potts, Cholachat Rujikiatkamjorn, Scott W. Sloan
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents an analytical solution and numerical simulation of vacuum consolidation beneath a circular loading area (e.g. circular oil tanks or silos). The discrete system of vertical drains is substituted by continuous concentric rings of equivalent drain walls. The effectiveness of the vacuum as distributed along the drain length and the well resistance of the drains are considered. A rigorous solution of radial drainage towards cylindrical drain walls is presented and compared to numerical FEM predictions. The model is then successfully adopted to analyse the vacuum consolidation of a circular embankment in the Ballina field testing facility in Australia.
A Rapid And Reliable Technique For N-Nitrosodimethylamine Analysis In Reclaimed Water By Hplc-Photochemical Reaction-Chemiluminescence, Takahiro Fujioka, Haruka Takeuchi, Hiroaki Tanaka, Long D. Nghiem, Kenneth P. Ishida, Hitoshi Kodamatani
A Rapid And Reliable Technique For N-Nitrosodimethylamine Analysis In Reclaimed Water By Hplc-Photochemical Reaction-Chemiluminescence, Takahiro Fujioka, Haruka Takeuchi, Hiroaki Tanaka, Long D. Nghiem, Kenneth P. Ishida, Hitoshi Kodamatani
Faculty of Engineering and Information Sciences - Papers: Part A
A fast and reliable analytical technique was evaluated and validated for determination of N-nitrosodimethylamine (NDMA) formation and rejection by reverse osmosis (RO) membranes in potable water reuse applications. The analytical instrument used in this study is high-performance liquid chromatography (HPLC), photochemical reaction (PR) and chemiluminescence (CL) e namely HPLC-PR-CL. Results reported here show that HPLC-PR-CL can be used to measure NDMA with a similar level of accuracy compared to conventional and more time-consuming techniques using gas chromatography and tandem mass spectrometry detection in combination with solid phase extraction. Among key residual chemicals (i.e. monochloramine, hydrogen peroxide and hypochlorite) in reclaimed …
Household Allocation, Johan Barthelemy
Household Allocation, Johan Barthelemy
Faculty of Engineering and Information Sciences - Papers: Part A
This chapter explains how to take spatial microdata, of the type we have generated in the previous chapters, and allocate the resulting individuals into household units.
Comparison Of Resting Energy Expenditure Between Cancer Subjects And Healthy Controls: A Meta-Analysis, Thi Yen Vi Nguyen, Marijka Batterham, Cheree Edwards
Comparison Of Resting Energy Expenditure Between Cancer Subjects And Healthy Controls: A Meta-Analysis, Thi Yen Vi Nguyen, Marijka Batterham, Cheree Edwards
Faculty of Engineering and Information Sciences - Papers: Part A
There is conflicting evidence surrounding the extent of changes in resting energy expenditure (REE) in cancer. This meta-analysis aimed to establish the mean difference in REE, as kilojoules per kilogram fat-free mass, among cancer patients when compared to healthy control subjects. The secondary aim was to determine differences among different cancer types. PubMed, Cochrane Library, Medline, Science Direct, Scopus, Web of Science, Wiley Online Library, and ProQuest Central were searched from the earliest records until March 2014. Studies were included if measured REE was reported as kilojoules or kilocalories per kilogram fat-free mass (FFM) in adult subjects with cancer. Twenty-seven …
Non-Smooth Feedback Control For Belousov-Zhabotinskii Reaction-Diffusion Equations: Semi-Analytical Solutions, Hassan Alfifi, Timothy R. Marchant, Mark Nelson
Non-Smooth Feedback Control For Belousov-Zhabotinskii Reaction-Diffusion Equations: Semi-Analytical Solutions, Hassan Alfifi, Timothy R. Marchant, Mark Nelson
Faculty of Engineering and Information Sciences - Papers: Part A
The Belousov-Zhabotinskii reaction is considered in one and two-dimensional reaction-diffusion cells. Feedback control is examined where the feedback mechanism involves varying the concentrations in the boundary reservoir, in response to the concentrations in the centre of the cell. Semi-analytical solutions are developed, via the Galerkin method, which assumes a spatial structure for the solution, and is used to approximate the governing delay partial differential equations by a system of delay ordinary differential equations. The form of feedback control considered, whilst physically realistic, is non-smooth as it has discontinuous derivatives. A stability analysis of the sets of smooth delay ordinary differential …
Cubic Autocatalysis In A Reaction-Diffusion Annulus: Semi-Analytical Solutions, Muteb Alharthi, Timothy R. Marchant, Mark Nelson
Cubic Autocatalysis In A Reaction-Diffusion Annulus: Semi-Analytical Solutions, Muteb Alharthi, Timothy R. Marchant, Mark Nelson
Faculty of Engineering and Information Sciences - Papers: Part A
Semi-analytical solutions for cubic autocatalytic reactions are considered in a circularly symmetric reaction-diffusion annulus. The Galerkin method is used to approximate the spatial structure of the reactant and autocatalyst concentrations. Ordinary differential equations are then obtained as an approximation to the governing partial differential equations and analyzed to obtain semi-analytical results for this novel geometry. Singularity theory is used to determine the regions of parameter space in which the different types of steady-state diagram occur. The region of parameter space, in which Hopf bifurcations can occur, is found using a degenerate Hopf bifurcation analysis. A novel feature of this geometry …
Towards Efficient Fully Randomized Message-Locked Encryption, Tao Jiang, Xiaofeng Chen, Qianhong Wu, Jianfeng Ma, Willy Susilo, Wenjing Lou
Towards Efficient Fully Randomized Message-Locked Encryption, Tao Jiang, Xiaofeng Chen, Qianhong Wu, Jianfeng Ma, Willy Susilo, Wenjing Lou
Faculty of Engineering and Information Sciences - Papers: Part A
Cross-user data deduplication will greatly reduce the storage cost of storage service provider. Motivated by secure data deduplication, Abadi et al. extended the work Message-Locked Encryption (MLE) and introduced the primitive of MLE2 with nice security properties. However, their fully randomized scheme (R-MLE2) requires the inefficient equality-testing algorithm to identify all duplicate ciphertexts. Thus, an interesting open problem is how to reduce the overhead of R-MLE2 and propose an efficient construction for R-MLE2. In this paper, we introduce a new primitive called μR-MLE2, which gives a partial positive answer to this open problem. Our main trick is to use the …
One-Round Strong Oblivious Signature-Based Envelope, Rongmao Chen, Yi Mu, Willy Susilo, Guomin Yang, Fuchun Guo, Mingwu Zhang
One-Round Strong Oblivious Signature-Based Envelope, Rongmao Chen, Yi Mu, Willy Susilo, Guomin Yang, Fuchun Guo, Mingwu Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Oblivious Signature-Based Envelope (OSBE) has been widely employed for anonymity-orient and privacy-preserving applications. The conventional OSBE execution relies on a secure communication channel to protect against eavesdroppers. In TCC 2012, Blazy, Pointcheval and Vergnaud proposed a framework of OSBE (BPV-OSBE) without requiring any secure channel by clarifying and enhancing the OSBE security notions. They showed how to generically build an OSBE scheme satisfying the new strong security in the standard model with a common-reference string. Their framework requires 2-round interactions and relies on the smooth projective hash function (SPHF) over special languages, i.e., languages from encryption of signatures. In this …
Linear Encryption With Keyword Search, Shiwei Zhang, Guomin Yang, Yi Mu
Linear Encryption With Keyword Search, Shiwei Zhang, Guomin Yang, Yi Mu
Faculty of Engineering and Information Sciences - Papers: Part A
Nowadays an increasing amount of data stored in the public cloud need to be searched remotely for fast accessing. For the sake of privacy, the remote files are usually encrypted, which makes them difficult to be searched by remote servers. It is also harder to efficiently share encrypted data in the cloud than those in plaintext. In this paper, we develop a searchable encryption framework called Linear Encryption with Keyword Search (LEKS) that can semi-generically convert some existing encryption schemes meeting our Linear Encryption Template (LET) to be searchable without re-encrypting all the data. For allowing easy data sharing, we …
Public Cloud Data Auditing With Practical Key Update And Zero Knowledge Privacy, Yong Yu, Yannan Li, Man Ho Au, Willy Susilo, Kim-Kwang Raymond Choo, Xinpeng Zhang
Public Cloud Data Auditing With Practical Key Update And Zero Knowledge Privacy, Yong Yu, Yannan Li, Man Ho Au, Willy Susilo, Kim-Kwang Raymond Choo, Xinpeng Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Data integrity is extremely important for cloud based storage services, where cloud users no longer have physical possession of their outsourced files. A number of data auditing mechanisms have been proposed to solve this problem. However, how to update a cloud user's private auditing key (as well as the authenticators those keys are associated with) without the user's re-possession of the data remains an open problem. In this paper, we propose a key-updating and authenticator-evolving mechanism with zero-knowledge privacy of the stored files for secure cloud data auditing, which incorporates zero knowledge proof systems, proxy re-signatures and homomorphic linear authenticators. …
Evaluating Energy Consumption Of Air Gap Membrane Distillation For Seawater Desalination At Pilot Scale Level, Hung Duong, Paul Cooper, Bart Nelemans, Tzahi Y. Cath, Long D. Nghiem
Evaluating Energy Consumption Of Air Gap Membrane Distillation For Seawater Desalination At Pilot Scale Level, Hung Duong, Paul Cooper, Bart Nelemans, Tzahi Y. Cath, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study aimed to optimise an air gap membrane distillation (AGMD) system for seawater desalination with respect to distillate production as well as thermal and electrical energy consumption. Pilot evaluation data shows a notable influence of evaporator inlet temperature and water circulation rate on process performance. An increase in both distillate production rate and energy efficiency could be obtained by increasing the evaporator inlet temperature. On the other hand, there was a trade-off between the distillate production rate and energy efficiency when the water circulation rate varied. Increasing the water circulation rate resulted in an improvement in the distillate production …
Combined Bearing And Shear-Out Capacity Of Structural Steel Bolted Connections, Lip H. Teh, Mehmet Eren Uz
Combined Bearing And Shear-Out Capacity Of Structural Steel Bolted Connections, Lip H. Teh, Mehmet Eren Uz
Faculty of Engineering and Information Sciences - Papers: Part A
This study is concerned with the strength limit state of serial bolted connections in structural steel plates. It points out that the ultimate load capacity of a serial bolted connection failing in combined bearing and shear-out cannot be computed as the simple sum of the respective ultimate bearing and ultimate shear-out capacities, which is implicitly permitted in design specifications worldwide. Based on the laboratory test results of 10 hot-rolled steel plate specimens composed of three different grades with nominal thicknesses ranging from 5 to 8 mm, the paper first establishes the ultimate bearing coefficient of a 20-mm bolted connection in …
Graphene/Pvdf Flat-Sheet Membrane For The Treatment Of Ro Brine From Coal Seam Gas Produced Water By Air Gap Membrane Distillation, Yun Chul Woo, Youngjin Kim, Wang-Geun Shim, Leonard D. Tijing, Minwei Yao, Long D. Nghiem, June-Seok Choi, Seung-Hyun Kim, Ho Kyong Shon
Graphene/Pvdf Flat-Sheet Membrane For The Treatment Of Ro Brine From Coal Seam Gas Produced Water By Air Gap Membrane Distillation, Yun Chul Woo, Youngjin Kim, Wang-Geun Shim, Leonard D. Tijing, Minwei Yao, Long D. Nghiem, June-Seok Choi, Seung-Hyun Kim, Ho Kyong Shon
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
A Non-Commutative Framework For Topological Insulators, Christopher J. Bourne, Alan L. Carey, Adam C. Rennie
A Non-Commutative Framework For Topological Insulators, Christopher J. Bourne, Alan L. Carey, Adam C. Rennie
Faculty of Engineering and Information Sciences - Papers: Part A
We study topological insulators, regarded as physical systems giving rise to topological invariants determined by symmetries both linear and anti-linear. Our perspective is that of non-commutative index theory of operator algebras. In particular, we formulate the index problems using Kasparov theory, both complex and real. We show that the periodic table of topological insulators and superconductors can be realized as a real or complex index pairing of a Kasparov module capturing internal symmetries of the Hamiltonian with a spectral triple encoding the geometry of the sample's (possibly non-commutative) Brillouin zone.
Experimental Investigation Of The Behaviour Of Concrete Beams Reinforced With Gfrp Bars Under Static And Impact Loading, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh
Experimental Investigation Of The Behaviour Of Concrete Beams Reinforced With Gfrp Bars Under Static And Impact Loading, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh
Faculty of Engineering and Information Sciences - Papers: Part A
Composite materials, including Fibre Reinforced Polymer (FRP) bars, have been gaining momentum as alternatives to traditional steel reinforcements in civil and structural engineering sectors. FRP materials are non-corrosive, non-conductive, and lightweight and possess high longitudinal tensile strength, which are advantageous for their use in civil infrastructure. This paper presents the results of an experimental investigation into the effects of the use of glass FRP (GFRP) bars as internal reinforcement on the behaviour of concrete beams. Both static and dynamic (impact) behaviours of the beam have been investigated. Twelve GFRP reinforced concrete (RC) beams were designed, cast and tested. Six GFRP …
Biomethane Potential Evaluation Of Co-Digestion Of Sewage Sludge And Organic Wastes, Richard Wickham, Brendan Galway, Heriberto A. Bustamante, Long D. Nghiem
Biomethane Potential Evaluation Of Co-Digestion Of Sewage Sludge And Organic Wastes, Richard Wickham, Brendan Galway, Heriberto A. Bustamante, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
Co-digestion of organic rich wastes and wastewater sludge to enhance biogas production has become an attractive economic possibility for water utilities. The suitability of the organic rich waste depends on its ability to produce biogas as well as its influence on the overall anaerobic digestion process. Biomethane potential evaluation was conducted to screen seven organic wastes and dehydrated algae. All co-substrates increased the bio-methane yield by three to six times compared with conventional anaerobic digestion of sewage sludge. Maximum co-digestion ratios were identifiable for most solid co-substrates including algae (6% wt/wt), undiluted food waste (5% wt/wt), bakery waste (5% wt/wt), …
Biological Performance And Trace Organic Contaminant Removal By A Side-Stream Ceramic Nanofiltration Membrane Bioreactor, Hop Phan, James A. Mcdonald, Faisal I. Hai, William E. Price, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
Biological Performance And Trace Organic Contaminant Removal By A Side-Stream Ceramic Nanofiltration Membrane Bioreactor, Hop Phan, James A. Mcdonald, Faisal I. Hai, William E. Price, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study evaluated the performance of a side-stream ceramic nanofiltration membrane bioreactor (NF-MBR) system with respect to basic water quality parameters as well as trace organic contaminant (TrOC) removal efficiency. The results show a stable biological performance of the continuous NF-MBR system with high effluent quality (total organic carbon < 4 mg L-1 and NH4 +-N below the detection limit). Significantly higher performance by this NF-MBR in comparison to the conventional microfiltration/ultrafiltration MBR regarding the removal of a large number of TrOCs was observed. TrOC removal efficiency depended on their hydrophobicity and molecular features. All hydrophobic compounds (LogD pH=6 > 3) were well removed (>85%), except diazinon (59 ± 7%). Hydrophilic compounds containing electron donating groups were also well removed (>90%). By contrast, hydrophilic compounds containing electron withdrawing groups were poorly removed (8-54%). Most of the 40 TrOCs investigated in this study did not accumulate in the sludge. Only …
Evaluating Ionic Organic Draw Solutes In Osmotic Membrane Bioreactors For Water Reuse, Wenhai Luo, Faisal I. Hai, William E. Price, Menachem Elimelech, Long D. Nghiem
Evaluating Ionic Organic Draw Solutes In Osmotic Membrane Bioreactors For Water Reuse, Wenhai Luo, Faisal I. Hai, William E. Price, Menachem Elimelech, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
The performance of two ionic organic draw solutes, namely sodium acetate (NaOAc) and ethylene-diamine-tetra acetic acid disodium salt (EDTA-2Na), during osmotic membrane bioreactor (OMBR) operation was investigated in this study. Their performance was compared to that of sodium chloride (NaCl). A reverse osmosis (RO) process was integrated with OMBR to form an OMBR-RO hybrid system for draw solute recovery and clean water production. Results show that the NaOAc and EDTA-2Na draw solutes significantly reduced salinity build-up in the bioreactor in comparison with NaCl during OMBR operation. At the same osmotic pressure, these two ionic organic draw solutions produced slightly lower …
Characterisation Of Silicon Diode Arrays For Dosimetry In External Beam Radiation Therapy, Claudiu S. Porumb, Abdullah H. Aldosari, Iolanda Fuduli, Dean L. Cutajar, Matthew Newall, Peter E. Metcalfe, Martin G. Carolan, Michael L. F Lerch, Vladimir Perevertaylo, Anatoly B. Rosenfeld, Marco Petasecca
Characterisation Of Silicon Diode Arrays For Dosimetry In External Beam Radiation Therapy, Claudiu S. Porumb, Abdullah H. Aldosari, Iolanda Fuduli, Dean L. Cutajar, Matthew Newall, Peter E. Metcalfe, Martin G. Carolan, Michael L. F Lerch, Vladimir Perevertaylo, Anatoly B. Rosenfeld, Marco Petasecca
Faculty of Engineering and Information Sciences - Papers: Part A
Modern stereotactic radiation therapy modalities utilize small beams and large dose gradients to deliver radiation in few fractions, reducing the possibility to correct for mistakes during the treatment process. Therefore, in order to ensure best possible treatment for the patient, quality assurance for such treatments necessitates a stable, linear, and sensitive radiation detector with high spatial resolution and radiation hardness. In this work, two silicon detector arrays with high spatial resolution have been characterized by 6 MV and 18 MV medical LINAC irradiation, and 5.5 MeV He2+ heavy ion microprobe. A maximum discrepancy of 0.6 mm in field size has …
Modeling Behaviour Of Railway Ballast In Prismoidal Apparatus Using Discrete Element Method, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Michele Dal Toe Casagrande
Modeling Behaviour Of Railway Ballast In Prismoidal Apparatus Using Discrete Element Method, Gino O. Calderon Vizcarra, Sanjay Nimbalkar, Michele Dal Toe Casagrande
Faculty of Engineering and Information Sciences - Papers: Part A
This article presents the results of numerical simulations of loading tests conducted on coarse particles that simulate railroad ballast. The objective of this study was to evaluate the deformation of ballast under vertical loading and to study the influence of the two different particle size distributions. One of them was according to particle size distribution recommended by Indraratna and co-workers in the past as an improvement to Australian Standard and the other was prepared in accordance with Brazilian standard. The discrete element method offers a new means of studying the response characteristics of railway ballast. The basic idea of discrete …
Field Assessment Of Ballasted Railroads Using Geosynthetics And Shock Mats, Sanjay Nimbalkar, Buddhima Indraratna
Field Assessment Of Ballasted Railroads Using Geosynthetics And Shock Mats, Sanjay Nimbalkar, Buddhima Indraratna
Faculty of Engineering and Information Sciences - Papers: Part A
The ballasted railroads form an integral part of the modern transportation infrastructure in Australia. However, they are subjected to large stresses especially on mixed traffic lines, where heavy freight trains are operated. Under such adverse operational conditions, ballast progressively degrades contributing to overall track deformations and frequent maintenance. Maintaining geometry of ballast embankments is necessary to improve safety and efficiency of railway operations. The use of artificial inclusions (geosynthetics and shock mats) as well as recycled (discarded) ballast in track can be economically viable options. In order to gain more insight, the CGRE has conducted extensive field trials on two …
Response Of Piles Subjected To Progressive Soil Movement, Hongyu Qin, Wei Dong Guo
Response Of Piles Subjected To Progressive Soil Movement, Hongyu Qin, Wei Dong Guo
Faculty of Engineering and Information Sciences - Papers: Part A
Model tests were conducted to investigate the behavior of vertically loaded, free head piles undergoing lateral soil movement using an experimental apparatus developed in house. This paper presents ten new tests on an instrumented model pile in dry sand, which provide the profiles of bending moment, shear force and pile deflection along the pile, the development of maximum bending moment Mmax, maximum shear force Tmax, and pile deflection y0 at the ground surface with soil movement. The tests reveal the effects of axial load P (at pile head), the distance between the tested pile and source of free soil movement …
Indoor Scene Reconstruction For Through-The-Wall Radar Imaging Using Low-Rank And Sparsity Constraints, Van H. Tang, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive
Indoor Scene Reconstruction For Through-The-Wall Radar Imaging Using Low-Rank And Sparsity Constraints, Van H. Tang, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive
Faculty of Engineering and Information Sciences - Papers: Part A
This paper addresses the problem of indoor scene reconstruction in compressed sensing through-the-wall radar imaging. The proposed method is motivated by two observations that wall reflections reside in a low-rank subspace and the imaged scene tends to be sparse. The task of mitigating the wall reflections and reconstructing an image of the scene behind-the-wall is cast as a joint low-rank and sparsity constrained optimization problem, where a low-rank matrix captures the wall returns and a sparse matrix represents the formed image. An iterative algorithm is developed to estimate the low-rank matrix and the sparse scene vector from a reduced measurement …
The Swelling Behaviour Of Lignosulfonate-Treated Expansive Soil, Dennis Pere Alazigha, Buddhima Indraratna, J S. Vinod, Lambert Emeka Ezeajugh
The Swelling Behaviour Of Lignosulfonate-Treated Expansive Soil, Dennis Pere Alazigha, Buddhima Indraratna, J S. Vinod, Lambert Emeka Ezeajugh
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents results regarding the potential of lignosulfonate (LS) to control the swelling of expansive soil. One-dimensional swell tests were performed on untreated and LS-treated remoulded samples of Australian expansive soil from the state of Queensland. The test results indicated that LS has significant influence on the swelling behaviour of this expansive soil. The results were compared with those of identical cement-treated soil samples, and it was found that LS could be a economical and environmentally friendly alternative to traditional alkaline additives. In addition, the behaviour of LS-treated specimens during repeated freezing and thawing cycles was measured. The results …
Controlled And Scalable Torsional Actuation Of Twisted Nylon 6 Fiber, Shazed Aziz, Sina Naficy, Javad Foroughi, Hugh Ralph Brown, Geoffrey M. Spinks
Controlled And Scalable Torsional Actuation Of Twisted Nylon 6 Fiber, Shazed Aziz, Sina Naficy, Javad Foroughi, Hugh Ralph Brown, Geoffrey M. Spinks
Faculty of Engineering and Information Sciences - Papers: Part A
Large-scale torsional actuation occurs in twisted fibers and yarns as a result of volume change induced electrochemically, thermally, photonically, and other means. A quantitative relationship between torsional actuation (stroke and torque) and volume change is here introduced. The analysis is based on experimental investigation of the effects of fiber diameter and inserted twist on the torsional stroke and torque measured when heating and cooling nylon 6 fibers over the temperature range of 26-62 °C. The results show that the torsional stroke depends only on the amount of twist inserted into the fiber and is independent of fiber diameter. The torque …
Factors Governing The Pre-Concentration Of Wastewater Using Forward Osmosis For Subsequent Resource Recovery, Ashley J. Ansari, Faisal I. Hai, Wenshan Guo, Hao H. Ngo, William E. Price, Long D. Nghiem
Factors Governing The Pre-Concentration Of Wastewater Using Forward Osmosis For Subsequent Resource Recovery, Ashley J. Ansari, Faisal I. Hai, Wenshan Guo, Hao H. Ngo, William E. Price, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study demonstrated a technique using forward osmosis (FO) to pre-concentrate the organic matter in raw wastewater, thereby transforming low strength wastewater into an anaerobically digestible solution. The chemical oxygen demand (COD) of raw wastewater was concentrated up to approximately eightfold at a water recovery of 90%. Thus, even low strength wastewater could be pre-concentrated by FO to the range suitable for biogas production via anaerobic treatment. Excessive salinity accumulation in pre-concentrated wastewater was successfully mitigated by adopting ionic organic draw solutes, namely, sodium acetate, and EDTA-2Na. These two draw solutes are also expected to benefit the digestibility of the …
An Exploratory Study Of Expectation In It Skills In A Developing Nation: Vietnam, S K. Lau, Graham K. Winley, Nelson K. Y. Leung, Nicole Tsang, Sim Yee Lau
An Exploratory Study Of Expectation In It Skills In A Developing Nation: Vietnam, S K. Lau, Graham K. Winley, Nelson K. Y. Leung, Nicole Tsang, Sim Yee Lau
Faculty of Engineering and Information Sciences - Papers: Part A
The purpose of this study is to explore expectations in information technology skills for organizations in Vietnam, a developing country in South East Asia. Previous research in Vietnam has mainly focused on information technology adoption; this study offers an insight into the demands of information technology skills in Vietnam. A theoretical framework consisting of five domains of expertise is used to examine the nature and structure of information technology profession in Vietnam. Results from the study show that there is an anticipated increase in demand for information technology professionals who possess deep skills in a broad scope of roles and …
Hydrostatic Compression Behavior And High-Pressure Stabilized Β-Phase In Γ-Based Titanium Aluminide Intermetallics, Klaus-Dieter Liss, Ken-Ichi Funakoshi, Rian J. Dippenaar, Yuji Higo, Ayumi Shiro, Mark H. Reid, Hiroshi Suzuki, Takahisa Shobu, Koichi Akita
Hydrostatic Compression Behavior And High-Pressure Stabilized Β-Phase In Γ-Based Titanium Aluminide Intermetallics, Klaus-Dieter Liss, Ken-Ichi Funakoshi, Rian J. Dippenaar, Yuji Higo, Ayumi Shiro, Mark H. Reid, Hiroshi Suzuki, Takahisa Shobu, Koichi Akita
Faculty of Engineering and Information Sciences - Papers: Part A
Titanium aluminides find application in modern light-weight, high-temperature turbines, such as aircraft engines, but suffer from poor plasticity during manufacturing and processing. Huge forging presses enable materials processing in the 10-GPa range, and hence, it is necessary to investigate the phase diagrams of candidate materials under these extreme conditions. Here, we report on an in situ synchrotron X-ray diffraction study in a large-volume press of a modern (α2 + γ) two-phase material, Ti-45Al-7.5Nb-0.25C, under pressures up to 9.6 GPa and temperatures up to 1686 K. At room temperature, the volume response to pressure is accommodated by the transformation γ → …
Design-Oriented Stress–Strain Model For Concrete Under Combined Frp-Steel Confinement, G Lin, Tao Yu, Jin Guang Teng
Design-Oriented Stress–Strain Model For Concrete Under Combined Frp-Steel Confinement, G Lin, Tao Yu, Jin Guang Teng
Faculty of Engineering and Information Sciences - Papers: Part A
Extensive research has been conducted on fiber-reinforced polymer (FRP)-confined plain and RC columns, leading to a large number of stress–strain models. Most of these models have been developed for FRP-confined plain concrete and are thus applicable only to concrete in FRP-confined RC columns with a negligible amount of transverse steel reinforcement. The few models that have been developed for concrete under the combined confinement of FRP and transverse steel reinforcement are either inaccurate or too complex for direct use in design. This paper presents an accurate design-oriented stress–strain model for concrete under combined FRP-steel confinement in FRP-confined circular RC columns. …
Cloud Computing Adoption Decision Modelling For Smes: From The Paprika Perspective, Salim Al Isma'ili, Mengxiang Li, Jun Shen
Cloud Computing Adoption Decision Modelling For Smes: From The Paprika Perspective, Salim Al Isma'ili, Mengxiang Li, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
The popularity of cloud computing has been growing among enter-prises since its inception. It is an emerging technology which promises competi-tive advantages, significant cost savings, enhanced business processes and ser-vices, and various other benefits. The aim of this paper is to propose a decision modelling using Potentially All Pairwise RanKings of all possible Alternatives (PAPRIKA) for the factors that have impact in SMEs cloud computing adoption process.