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Articles 211 - 240 of 2936
Full-Text Articles in Social and Behavioral Sciences
Microstructure And Micro-Texture Evolution During The Dynamic Recrystallisation Of A Ni-30fe-Nb-C Model Alloy, Parvez Mannan, Ahmed A. Saleh, Azdiar A. Gazder, Gilberto Casillas, Elena V. Pereloma
Microstructure And Micro-Texture Evolution During The Dynamic Recrystallisation Of A Ni-30fe-Nb-C Model Alloy, Parvez Mannan, Ahmed A. Saleh, Azdiar A. Gazder, Gilberto Casillas, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
The evolution of microstructure and micro-texture during discontinuous dynamic recrystallisation of an austenitic Ni-30Fe-Nb-C model alloy subjected to interrupted plane strain compression at strains (ε) of 0.23, 0.35, 0.68, 0.85 and 1.2 was investigated using electron backscattering diffraction and transmission electron microscopy. Throughout the strain range, the majority of dynamic recrystallisation events comprised nucleation in necklace-like arrangements located at and along grain boundaries via bulging. At ε ≥ 0.68, discrete nucleation events were also observed within grain interiors. Grain growth during dynamic recrystallisation is characteristic of strain induced boundary migration. The initial texture comprised Cube-RD ({013}〈100〉), Cube-ND ({001}〈310〉) and Cube …
Towards An Automated Robotic Arc-Welding-Based Additive Manufacturing System From Cad To Finished Part, Donghong Ding, Chen Shen, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Nathan P. Larkin, Stephen Van Duin
Towards An Automated Robotic Arc-Welding-Based Additive Manufacturing System From Cad To Finished Part, Donghong Ding, Chen Shen, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Nathan P. Larkin, Stephen Van Duin
Faculty of Engineering and Information Sciences - Papers: Part A
Arc welding has been widely explored for additive manufacturing of large metal components over the last three decades due to its lower capital cost, an unlimited build envelope, and higher deposition rates. Although significant improvements have been made, an arc welding process has yet to be incorporated in a commercially available additive manufacturing system. The next step in exploiting "true" arc-welding-based additive manufacturing is to develop the automation software required to produce CAD-to-part capability. This study focuses on developing a fully automated system using robotic gas metal arc welding to additively manufacture metal components. The system contains several modules, including …
Reduction Of Quartz To Silicon Monoxide By Methane-Hydrogen Mixtures, Xiang Li, Guangqing Zhang, Ragnar Tronstad, Oleg Ostrovski
Reduction Of Quartz To Silicon Monoxide By Methane-Hydrogen Mixtures, Xiang Li, Guangqing Zhang, Ragnar Tronstad, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
The reduction of quartz was studied isothermally in a fluidized bed reactor using continuously flowing methane-hydrogen gas mixture in the temperature range from 1623 K to 1773 K (1350 °C to 1500 °C). The CO content in the off-gas was measured online using an infrared gas analyzer. The main phases of the reduced samples identified by XRD analysis were quartz and cristobalite. Significant weight loss in the reduction process indicated that the reduction products were SiO and CO. Reduction of SiO2 to SiO by methane starts with adsorption and dissociation of CH4 on the silica surface. The high carbon activity …
Rapid Transformation Of Hexagonal To Cubic Silicon Carbide (Sic) By Electric Discharge Assisted Mechanical Milling, Iis Siti Aisyah, Monika Wyszomirska, Andrzej Calka, David Wexler
Rapid Transformation Of Hexagonal To Cubic Silicon Carbide (Sic) By Electric Discharge Assisted Mechanical Milling, Iis Siti Aisyah, Monika Wyszomirska, Andrzej Calka, David Wexler
Faculty of Engineering and Information Sciences - Papers: Part A
Silicon carbide powder was successfully transformed from hexagonal SiC into cubic SiC using the electric discharge assisted mechanical milling (EDAMM) method. The milling process was conducted in nitrogen plasma at atmospheric pressure. The effects of pulsed alternating current (AC) and direct current (DC) discharge on product formation were investigated. Products were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy and nanohardness. It was found that hexagonal SiC can be transformed into cubic SiC under EDAMM processing, near complete transformation occurring within 5 min when applying AC mode electrical pulses, and within 10 min when applying DC mode discharges.
State Of The Art Of Control Schemes For Smart Systems Featuring Magneto-Rheological Materials, Seung-Bok Choi, Weihua Li, Miao Yu, Haiping Du, Jie Fu, Phu Xuan Do
State Of The Art Of Control Schemes For Smart Systems Featuring Magneto-Rheological Materials, Seung-Bok Choi, Weihua Li, Miao Yu, Haiping Du, Jie Fu, Phu Xuan Do
Faculty of Engineering and Information Sciences - Papers: Part A
This review presents various control strategies for application systems utilizing smart magneto-rheological fluid (MRF) and magneto-rheological elastomers (MRE). It is well known that both MRF and MRE are actively studied and applied to many practical systems such as vehicle dampers. The mandatory requirements for successful applications of MRF and MRE include several factors: advanced material properties, optimal mechanisms, suitable modeling, and appropriate control schemes. Among these requirements, the use of an appropriate control scheme is a crucial factor since it is the final action stage of the application systems to achieve the desired output responses. There are numerous different control …
Microstructures And Mechanical Properties Of Trip Steel Produced By Strip Casting Simulated In The Laboratory, Zhiping Xiong, Andrii Kostryzhev, Ahmed A. Saleh, Liang Chen, Elena V. Pereloma
Microstructures And Mechanical Properties Of Trip Steel Produced By Strip Casting Simulated In The Laboratory, Zhiping Xiong, Andrii Kostryzhev, Ahmed A. Saleh, Liang Chen, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
Conventional transformation induced plasticity (TRIP) steel (0.17C-1.52Si-1.61Mn-0.03Al, wt%) was produced via strip casting technology simulated in the laboratory. Effects of holding temperature, holding time and cooling rate on ferrite formation were studied via analysis of the continuous cooling transformation diagram obtained here. A typical microstructure for conventional TRIP steels consisting of ~ 0.55 fraction of polygonal ferrite with bainite, retained austenite and martensite was obtained. However, coarse prior austenite grain size of ~80 μm led to large polygonal ferrite grain size of ~17 μm, coarse second phase regions of ~21 μm size, small amount of retained austenite (0.02-0.045) and the …
Special Rolling Techniques For Improvement Of Mechanical Properties Of Ultrafine-Grained Metal Sheets: A Review, Hai Liang Yu, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Ajit R. Godbole, Shi-Hong Zhang
Special Rolling Techniques For Improvement Of Mechanical Properties Of Ultrafine-Grained Metal Sheets: A Review, Hai Liang Yu, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Ajit R. Godbole, Shi-Hong Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Interest in ultrafine-grained (UFG) materials has grown rapidly in past 20 years. This review focuses on the application of special rolling techniques for improvement of the mechanical properties of UFG metal sheets. These techniques include asymmetric rolling, cryorolling, asymmetric cryorolling, cross-accumulative roll bonding, and skin-pass rolling. The techniques also include a combination of processes such as equal channel angular press and subsequent rolling, combined high-pressure torsion and subsequent rolling, as well as combined accumulative roll bonding and subsequent asymmetric rolling. We also discuss the main mechanisms leading to improvement in the ductility of UFG materials related to the special rolling …
The Rheology Of Shear Thickening Fluids With Various Ceramic Particle Additives, Selim Gürgen, Weihua Li, Melih Cemal Kushan
The Rheology Of Shear Thickening Fluids With Various Ceramic Particle Additives, Selim Gürgen, Weihua Li, Melih Cemal Kushan
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, shear thickening fluids (STFs) and three different types of additive particles such as silicon carbide, aluminum oxide and boron carbide are presented. STFs were fabricated based on nanosize fumed silica suspended in a liquid medium, polyethylene glycol at a constant concentration of 20 wt%, and then varying amounts of different types of particle additives were added. Their rheological properties under various temperatures were tested using a rheometer, and the effects of silica loading on the rheology of pure STF were investigated. The suspensions exhibited different systematic variations with respect to the varied parameters.
Orthogonal Experimental Design Of Titanium Dioxide - Poly(Methyl Methacrylate) Electrospun Nanocomposite Membranes For Photocatalytic Applications, Andrew Vild, Sara Teixeira, Klaus Kuhn, Gianaurelio Cuniberti, Vitor Sencadas
Orthogonal Experimental Design Of Titanium Dioxide - Poly(Methyl Methacrylate) Electrospun Nanocomposite Membranes For Photocatalytic Applications, Andrew Vild, Sara Teixeira, Klaus Kuhn, Gianaurelio Cuniberti, Vitor Sencadas
Faculty of Engineering and Information Sciences - Papers: Part A
An orthogonal experimental method was designed to assess the influence of the electrospinning processing parameters on average diameter and distribution of poly(methyl methacrylate) (PMMA) fibers. Based on the orthogonal experimental design analysis, electrospun TiO2-PMMA nanocomposites were processed with the optimal polymer processing conditions to obtain thin fibers with a high overall surface area. Further it was found that the average fiber diameter decreases from 2.0 ± 0.5 down to 1.2 ± 0.2 μm with increasing photocatalyst content. Moreover, the wettability of samples was independent of the filler amount, and showed strong hydrophobic behavior. Thermogravimetric analysis showed that for polymer solutions …
Developing An Optimum Maintenance Policy By Life Cycle Cost Analysis - A Case Study, Khaled O. El-Akruti, Tieling Zhang, Richard Dwight
Developing An Optimum Maintenance Policy By Life Cycle Cost Analysis - A Case Study, Khaled O. El-Akruti, Tieling Zhang, Richard Dwight
Faculty of Engineering and Information Sciences - Papers: Part A
This paper focuses on developing maintenance policies for critical assets to improve the production performance based on life cycle cost (LCC) analysis. A general approach is adopted for conducting the LCC analysis. The investigation is based on a case study to demonstrate how an optimum maintenance policy is determined. The relevant LCC structure in the case study is defined for the decision process which involves determination of the optimum life, repair limit and selection of materials, and trade-off between repair and replacement. The LCC analysis is based on statistical data modelling which facilitates decision-making on the optimal replacement of an …
On The Feasibility Of Partial Slip Reversal And De-Twinning During The Cyclic Loading Of Twip Steel, Ahmed A. Saleh, Bjorn Clausen, Donald W. Brown, Elena V. Pereloma, Christopher H. J Davies, Carlos N. Tome, Azdiar A. Gazder
On The Feasibility Of Partial Slip Reversal And De-Twinning During The Cyclic Loading Of Twip Steel, Ahmed A. Saleh, Bjorn Clausen, Donald W. Brown, Elena V. Pereloma, Christopher H. J Davies, Carlos N. Tome, Azdiar A. Gazder
Faculty of Engineering and Information Sciences - Papers: Part A
A recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the cyclic (tension-compression) loading behaviour of an Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel between strain limits of ±1%. Lattice strain measurements acquired via in-situ neutron diffraction were used to further validate the modelling results. An improved prediction of the pronounced Bauschinger effect during unloading is achieved when the reversibility of partial slip in the 〈112〉 direction is accounted for. This result indicates a potential contribution of the stress-induced separation of partial dislocations to the observed early yielding …
Enhanced Mechanical Properties Of Arb-Processed Aluminum Alloy 6061 Sheets By Subsequent Asymmetric Cryorolling And Ageing, Hai Liang Yu, Lihong Su, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Jintao Li, Ajit R. Godbole, Charlie Kong
Enhanced Mechanical Properties Of Arb-Processed Aluminum Alloy 6061 Sheets By Subsequent Asymmetric Cryorolling And Ageing, Hai Liang Yu, Lihong Su, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Jintao Li, Ajit R. Godbole, Charlie Kong
Faculty of Engineering and Information Sciences - Papers: Part A
Grain size and precipitations affect the strength and ductility of ultrafine-grained materials. In this study, aluminum alloy 6061 sheets were fabricated using the accumulative roll bonding (ARB) technique. The ARB-processed sheets were subsequently subjected to cryorolling and asymmetric cryorolling. The sheets were further aged at 100 °C for 48 h. Mechanical tests show that a combination of asymmetric cryorolling and ageing results in significant improvement in both the ductility and the strength of the ARB-processed sheets. The microstructures of the sheets at different stages of the process were also analyzed using optical microscopy, scanning electron microscopy, transmission electron microscopy and …
Effect Of Cyano Dipolar Groups On The Performance Of Lithium-Ion Battery Electrospun Polyimide Gel Electrolyte Membranes, A Maceiras, A Goren, Vitor Sencadas, Carlos M. Costa, J L. Vilas, Senentxu Lanceros-Méndez, L M. Leon
Effect Of Cyano Dipolar Groups On The Performance Of Lithium-Ion Battery Electrospun Polyimide Gel Electrolyte Membranes, A Maceiras, A Goren, Vitor Sencadas, Carlos M. Costa, J L. Vilas, Senentxu Lanceros-Méndez, L M. Leon
Faculty of Engineering and Information Sciences - Papers: Part A
Three polyimide membranes (polymer 0CN, copolymers 0CN/2CN (50/50) and polymer 2CN), with and without [Formula presented] dipolar groups, have been prepared by electrospinning and evaluated as lithium-ion battery separators. The prepared membranes show average fiber diameters between 0.5 and 1.09 μm and a degree of porosity of ~ 80%. The thermal stability, uptake, tortuosity and ionic conductivity values are influenced by the presence of the [Formula presented] dipolar groups in the polyimide polymer chain. The best battery performance in LFP/Li system is obtained for the 0CN sample, which shows discharge capacity values of 149.7 mAh·g− 1, 146.5 mAh·g− 1 and …
Influence Of Cr-Rich Oxide Scale On Sliding Wear Mechanism Of Ferritic Stainless Steel At High Temperature, Xiawei Cheng, Zhengyi Jiang, Buyung Kosasih, Hui Wu, Suzhen Luo, Laizhu Jiang
Influence Of Cr-Rich Oxide Scale On Sliding Wear Mechanism Of Ferritic Stainless Steel At High Temperature, Xiawei Cheng, Zhengyi Jiang, Buyung Kosasih, Hui Wu, Suzhen Luo, Laizhu Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
The tribological tests of a ferritic stainless steel (FSS) 445 in contact with high-speed steel (HSS) were performed on a high-temperature pin-on-disc tribometer. Wear exhibited significant difference when the FSS 445 was oxidised with a Cr-rich oxide scale on the surface. The HSS pin displayed adhesive wear when there was no oxide scale on the stainless steel disc, and in the early stages, the coefficient of friction fluctuated significantly, but the level of wear changed as Cr2O3 particles formed. The wear was then reduced, and the coefficient of friction remained stable. The Cr-rich oxide scale which formed on the stainless …
The Evolution In The Stellar Mass Of Brightest Cluster Galaxies Over The Past 10 Billion Years, Sabine Bellstedt, Christopher E. Lidman, Adam Muzzin, Marijn Franx, Susanna Guatelli, Allison R. Hill, Henk Hoekstra, Noah Kurinsky, Ivo Labbe, Danilo Marchesini, Z. Cemile Marsan, Mitra Safavi-Naeini, Cristobal Sifon, Mauro Stefanon, Jesse Van De Sande, Pieter Van Dokkum, Catherine Weigel
The Evolution In The Stellar Mass Of Brightest Cluster Galaxies Over The Past 10 Billion Years, Sabine Bellstedt, Christopher E. Lidman, Adam Muzzin, Marijn Franx, Susanna Guatelli, Allison R. Hill, Henk Hoekstra, Noah Kurinsky, Ivo Labbe, Danilo Marchesini, Z. Cemile Marsan, Mitra Safavi-Naeini, Cristobal Sifon, Mauro Stefanon, Jesse Van De Sande, Pieter Van Dokkum, Catherine Weigel
Faculty of Engineering and Information Sciences - Papers: Part A
Using a sample of 98 galaxy clusters recently imaged in the near-infrared with the European Southern Observatory (ESO) New Technology Telescope, WIYN telescope and William Her- schel Telescope, supplemented with 33 clusters from the ESO archive, we measure how the stellar mass of the most massive galaxies in the universe, namely brightest cluster galaxies (BCGs), increases with time. Most of the BCGs in this new sample lie in the redshift range 0.2
Young's Modulus Measurement Using Fibre-Coupled Self-Mixing Laser Diode, Ke Lin, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Hui Jun Li
Young's Modulus Measurement Using Fibre-Coupled Self-Mixing Laser Diode, Ke Lin, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Hui Jun Li
Faculty of Engineering and Information Sciences - Papers: Part A
A new fibre-coupled self-mixing laser diode is developed for measurement of Young's modulus. Instead of transmission in free space, the light path is coupled in a fibre, which enables the measuring system easily and feasibly to be installed in many application cases. A specimen made of aluminium alloy 6061 is tested by the system designed. The obtained value of Young's modulus is 70.02 GPa with 0.16% measurement accuracy, showing a high repeatability and a good agreement with the standard values reported in literatures.
Exploiting The Error Correction Mechanism In Qr Codes For Secret Sharing, Yang-Wai Chow, Willy Susilo, Guomin Yang, James Phillips, Ilung Pranata, Ari Moesriami Barmawi
Exploiting The Error Correction Mechanism In Qr Codes For Secret Sharing, Yang-Wai Chow, Willy Susilo, Guomin Yang, James Phillips, Ilung Pranata, Ari Moesriami Barmawi
Faculty of Engineering and Information Sciences - Papers: Part A
This paper investigates a novel approach to secret sharing using QR codes. The proposed QR code secret sharing approach exploits the error correction mechanism inherent in the QR code structure, to distribute and encode information about a secret message in a number of shares. Each share in the scheme is constructed from a cover QR code, and each share itself is a valid QR code which can be scanned and decoded by a QR code reader. The secret message can be recovered by combining the information contained in the QR code shares. Since each share is a valid QR code, …
Anonymous Identity-Based Broadcast Encryption With Revocation For File Sharing, Jianchang Lai, Yi Mu, Fuchun Guo, Willy Susilo, Rongmao Chen
Anonymous Identity-Based Broadcast Encryption With Revocation For File Sharing, Jianchang Lai, Yi Mu, Fuchun Guo, Willy Susilo, Rongmao Chen
Faculty of Engineering and Information Sciences - Papers: Part A
Traditionally, a ciphertext from an identity-based broadcast encryption can be distributed to a group of receivers whose identities are included in the ciphertext. Once the ciphertext has been created, it is not possible to remove any intended receivers from it without conducting decryption. In this paper, we consider an interesting question: how to remove target designated receivers from a ciphertext generated by an anonymous identity-based broadcast encryption? The solution to this question is found applicable to file sharing with revocation. In this work, we found an affirmative answer to this question. We construct an anonymous identity-based broadcast encryption, which offers …
Whose Body Is It? The Body As Physical Capital In A Techno-Society, Sharon Bradley-Munn, Katina Michael
Whose Body Is It? The Body As Physical Capital In A Techno-Society, Sharon Bradley-Munn, Katina Michael
Faculty of Engineering and Information Sciences - Papers: Part A
In today's postmodern Western world, there is a greater propensity toward consumerism. Mass-market production coupled with international trade means that you can buy just about anything made anywhere with the simple click of a mouse. Not only are we seeing the commoditization of things (i.e., material objects), but also businesses and industries are capitalizing on this consumerist mentality, studying individuals? buying habits to demographically target their market. This data mining is done through a multiplicity of ways, such as through technological monitors called sensors. Sensors capture humancentric data at discrete intervals, generating big data that draws out patterns. Behavior can …
The Impact Of Social Media Policy And Use On Value Creation: A Survey Research, Uuf Brajawidagda, Akemi T. Chatfield
The Impact Of Social Media Policy And Use On Value Creation: A Survey Research, Uuf Brajawidagda, Akemi T. Chatfield
Faculty of Engineering and Information Sciences - Papers: Part A
Organizations need to provide effective policies in aligning their social media use with organizational goals to realize the expected benefits of social media. However, while social media use has been studied, social media policy research is lacking. This study aims to examine impacts of social media policy and active use on value creation. Drawing on the Model of IT/Business Value, we assessed the interplay between social media policy and social media use on value creation in a survey research conducted with Indonesia's disaster management agencies. Our analysis results of 124 survey responses show that social media use and social media …
Two-Factor Data Security Protection Mechanism For Cloud Storage System, Joseph K. Liu, Kaitai Liang, Willy Susilo, Jianghua Liu, Yang Xiang
Two-Factor Data Security Protection Mechanism For Cloud Storage System, Joseph K. Liu, Kaitai Liang, Willy Susilo, Jianghua Liu, Yang Xiang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we propose a two-factor data security protection mechanism with factor revocability for cloud storage system. Our system allows a sender to send an encrypted message to a receiver through a cloud storage server. The sender only needs to know the identity of the receiver but no other information (such as its public key or its certificate). The receiver needs to possess two things in order to decrypt the ciphertext. The first thing is his/her secret key stored in the computer. The second thing is a unique personal security device which connects to the computer. It is impossible …
Optimal Design Of Fixture Layout In A Multi-Station Assembly Using Highly Optimized Tolerance Inspired Heuristic, Satish Tyagi, Nagesh Shukla, Sumant Kulkarni
Optimal Design Of Fixture Layout In A Multi-Station Assembly Using Highly Optimized Tolerance Inspired Heuristic, Satish Tyagi, Nagesh Shukla, Sumant Kulkarni
Faculty of Engineering and Information Sciences - Papers: Part A
The multi-station assembly (MSA) process requires auxiliary devices such as fixtures and clamps to accurately locate and firmly hold the workpiece in a desired position. Improper positioning of these fixtures and clamps affects the dimensional integrity of final product. This study determines the optimal design of fixture layout that minimizes the product dimensional variations caused by the manhandling and aging of auxiliaries. In order to model variation propagation from one assembly station to another in the MSA, a state space model is employed. Further, an E-optimality based sensitivity criterion is proposed to mathematically formulate and measure the quality of the …
A Process Of Prioritizing Topics For Health Technology Assessment In Kazakhstan, Lyazzat Kosherbayeva, David M. Hailey, Kural Kurakbaev, Adlet Tabarov, Ainur Kumar, Gulnara Gutzskaya, Elena Stepkina
A Process Of Prioritizing Topics For Health Technology Assessment In Kazakhstan, Lyazzat Kosherbayeva, David M. Hailey, Kural Kurakbaev, Adlet Tabarov, Ainur Kumar, Gulnara Gutzskaya, Elena Stepkina
Faculty of Engineering and Information Sciences - Papers: Part A
Objectives: The aim of this study was to develop criteria for the prioritization of topics for health technology assessment (HTA) in the healthcare system of Kazakhstan. Methods: Initial proposals for criteria were suggested through consultation with Ministry of Health (MoH) policy areas. These were refined through a workshop attended by HTA department staff, persons from medical universities and research institutes, and MoH policy makers. The workshop included discussion on methods used in international HTA practice. Opinions of participants on selection of criteria from those specified in a review of prioritization processes were used to define a list for inclusion in …
Hölder Regularity Of The Solution To The Complex Monge-Ampère Equation With L P Density, Luca Baracco, Tran Vu Khanh, Stefano Pinton, Giuseppe Zampieri
Hölder Regularity Of The Solution To The Complex Monge-Ampère Equation With L P Density, Luca Baracco, Tran Vu Khanh, Stefano Pinton, Giuseppe Zampieri
Faculty of Engineering and Information Sciences - Papers: Part A
On a smooth domain ⊂⊂ Cn,we consider the Dirichlet problem for the complex Monge-Ampère equation ((ddcu)n = f dV, u|b ≡ φ). We state the Hölder regularity of the solution u when the boundary value φ is Hölder continuous and the density f is only L p, p > 1. Note that in former literature (Guedj-Kolodziej-Zeriahi) the weakness of the assumption f ∈ L p was balanced by taking φ ∈ C1,1 (in addition to assuming strongly pseudoconvex).
Learning Path Adaptation In Online Learning Systems, Alva Hendi Muhammad, Qingguo Zhou, Ghassan Beydoun, Dongming Xu, Jun Shen
Learning Path Adaptation In Online Learning Systems, Alva Hendi Muhammad, Qingguo Zhou, Ghassan Beydoun, Dongming Xu, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
Learning path in online learning systems refers to a sequence of learning objects which are designated to help the students in improving their knowledge or skill in particular subjects or degree courses. In this paper, we review the recent research on learning path adaptation to pursue two goals, first is to organize and analyze the parameter of adaptation in learning path; the second is to discuss the challenges in implementing learning path adaptation. The survey covers the state of the art and aims at providing a comprehensive introduction to the learning path adaptation for researchers and practitioners.
Commentary On "The Influence Of Hospital-Based Hta On Technology Acquisition Decision", David M. Hailey
Commentary On "The Influence Of Hospital-Based Hta On Technology Acquisition Decision", David M. Hailey
Faculty of Engineering and Information Sciences - Papers: Part A
The article by Dupouy and Gagnon presents a case study on the structure and operation of an HB-HTA unit with reference to an assessment of a diagnostic technology. It gives interesting details on the organization of an HB-HTA program, and of the approaches that were taken in the assessment. It also notes the demands on a small unit and some limits to its activities. Semi-structured interviews were held with informants from three groups in the hospital. Excerpts from the interviews provide further insight. Projects of the HTA Unit are assisted by a stakeholders working group; information is included on its …
A Data-Driven Predictive Model For Residential Mobility In Australia - A Generalised Linear Mixed Model For Repeated Measured Binary Data, Mohammad-Reza Namazi-Rad, Payam Mokhtarian, Nagesh Shukla, Albert Munoz
A Data-Driven Predictive Model For Residential Mobility In Australia - A Generalised Linear Mixed Model For Repeated Measured Binary Data, Mohammad-Reza Namazi-Rad, Payam Mokhtarian, Nagesh Shukla, Albert Munoz
Faculty of Engineering and Information Sciences - Papers: Part A
Household relocation modelling is an integral part of the Government planning process as residential movements influence the demand for community facilities and services. This study will address the problem of modelling residential relocation choice by estimating a logit-link class model. The proposed model estimates the probability of an event which triggers household relocation. The attributes considered in this study are: requirement for bedrooms, employment status, income status, household characteristics, and tenure (i.e. duration living at the current location). Accurate prediction of household relocations for population units should rely on real world observations. In this study, a longitudinal survey data gathered …
Biaxial Creep Test Study On The Influence Of Structural Anisotropy On Rheological Behaviour Of Hard Rock, Chuangzhou Wu, Qingsheng Chen, Sudip Basack, Riqing Xu, Zhenming Shi
Biaxial Creep Test Study On The Influence Of Structural Anisotropy On Rheological Behaviour Of Hard Rock, Chuangzhou Wu, Qingsheng Chen, Sudip Basack, Riqing Xu, Zhenming Shi
Faculty of Engineering and Information Sciences - Papers: Part A
Rheological characteristics are one of most important properties needed to be considered for the designing and construction for the long term stability and serviceability of underground structures in the rock mass. Up to date, although extensive studies on the rheological properties of rocks are available in the literature, most of existing studies reported the strain-time data for the axial deformation through compression rheological method and did not mention the lateral deformation, and mainly focused on the soft rocks at shallow depth. Thus, very limited attention has been paid to the rheological properties of deep and hard rock, neglecting the effects …
Telehealth In Nephrology Care - Promises And Challenges, David M. Hailey
Telehealth In Nephrology Care - Promises And Challenges, David M. Hailey
Faculty of Engineering and Information Sciences - Papers: Part A
Telenephrology has been suggested as an approach to facilitate coordinated care between primary care providers and nephrologists for patients with chronic kidney disease (CKD). Telehealth, the delivery of health-related services and information at a distance by telecommunication technologies, has been relatively little used in nephrology. Technologies used in telehealth continue to expand and range from telephone consultation to various web-based applications. Telehealth offers potential benefits and efficiencies, but evidence of its effectiveness and economic impact is less extensive than might be expected. A recent overview noted limitations in the telehealth literature, including many short-term feasibility studies with few participants, failure …
An Expert Pi Controller With Dead Time Compensation Of Monitor Agc In Hot Strip Mill, Fei Zhang, Shengyue Zong, Xiang Wang, Xiaohuai Ren
An Expert Pi Controller With Dead Time Compensation Of Monitor Agc In Hot Strip Mill, Fei Zhang, Shengyue Zong, Xiang Wang, Xiaohuai Ren
Faculty of Engineering and Information Sciences - Papers: Part A
Hot strip rolling production is a high-speed process which requires high-speed control and communication system, but because of the long distance between the delivery stand of the finishing mill and the gauge meter, dead time occurs when strip is transported from the site of the actuator to another location where the gauge meter takes its reading, which seriously affects the thickness control effect. According to the process model which is developed based on the measured data, a filtered Smith predictor is applied to predict the thickness deviation of the finishing mill. At the same time, an expert PI controller based …