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Full-Text Articles in Engineering
Monte Carlo Study Of The Potential Reduction In Out-Of-Field Dose Using A Patient-Specific Aperture In Pencil Beam Scanning Proton Therapy, Stephen J. Dowdell, Benjamin Clasie, Nicolas Depauw, Peter E. Metcalfe, Anatoly B. Rosenfeld, Hanne M. Kooy, Jacob B. Flanz, Harald Paganetti
Monte Carlo Study Of The Potential Reduction In Out-Of-Field Dose Using A Patient-Specific Aperture In Pencil Beam Scanning Proton Therapy, Stephen J. Dowdell, Benjamin Clasie, Nicolas Depauw, Peter E. Metcalfe, Anatoly B. Rosenfeld, Hanne M. Kooy, Jacob B. Flanz, Harald Paganetti
Faculty of Engineering - Papers (Archive)
This study is aimed at identifying the potential benefits of using a patientspecific aperture in proton beam scanning. For this purpose, an accurate Monte Carlo model of the pencil beam scanning (PBS) proton therapy (PT) treatment head at Massachusetts General Hospital (MGH) was developed based on an existing model of the passive double-scattering (DS) system. The Monte Carlo code specifies the treatment head at MGH with sub-millimeter accuracy. The code was configured based on the results of experimental measurements performed at MGH. This model was then used to compare out-of-field doses in simulated DS treatments and PBS treatments. For the …
How To Achieve Maximum Charge Carrier Loading On Heteroatom-Substituted Graphene Nanoribbon Edges: Density Functional Theory Study, Ting Liao, Chenghua Sun, Ziqi Sun, Aijun Du, Denisa Hulicova-Jurcakova, Sean C. Smith
How To Achieve Maximum Charge Carrier Loading On Heteroatom-Substituted Graphene Nanoribbon Edges: Density Functional Theory Study, Ting Liao, Chenghua Sun, Ziqi Sun, Aijun Du, Denisa Hulicova-Jurcakova, Sean C. Smith
Faculty of Engineering - Papers (Archive)
The practical number of charge carriers loaded is crucial to the evaluation of the capacity performance of carbon-based electrodes in service, and cannot be easily addressed experimentally. In this paper, we report a density functional theory study of charge carrier adsorption onto zigzag edge-shaped graphene nanoribbons (ZGNRs), both pristine and incorporating edge substitution with boron, nitrogen or oxygen atoms. All edge substitutions are found to be energetically favorable, especially in oxidized environments. The maximal loading of protons onto the substituted ZGNR edges obeys a rule of [8-n- 1], where n is the number of valence electrons of the edge-site atom …
Microstructural Evolution During Gaseous Hydrogen Charging Of Zircaloy-4 Processed By High-Pressure Torsion: A Comparative Study, Zhiyang Wang, Huijun Li, Ulf Garbe, Mark D. Callaghan, Yanbo Wang, Xiaozhou Liao
Microstructural Evolution During Gaseous Hydrogen Charging Of Zircaloy-4 Processed By High-Pressure Torsion: A Comparative Study, Zhiyang Wang, Huijun Li, Ulf Garbe, Mark D. Callaghan, Yanbo Wang, Xiaozhou Liao
Faculty of Engineering - Papers (Archive)
The original and high-pressure torsion (HPT) processed Zircaloy-4 materials were hydrided using gaseous hydrogen charging at different hydrogen pressures (10, 15 and 20 atm). The phase and microstructural evolutions of the samples during hydriding were characterized. It showed that when hydriding at the identical conditions, more hydrides tended to form in the HPT samples compared to that of the original ones. At a hydrogen pressure of 20 atm, the HPT sample was completely converted to ε-ZrH2 while some δ-ZrH1.66 hydrides (volume fraction ~5.73%) were present in the material without HPT preprocessing. The HPT samples exhibited high potential for the hydride …
A Laboratory Study Of Railway Ballast Behaviour Under Various Fouling Degree, Cholachat Rujikiatkamjorn, Buddhima Indraratna, Ngoc Trung Ngo, Matthew Coop
A Laboratory Study Of Railway Ballast Behaviour Under Various Fouling Degree, Cholachat Rujikiatkamjorn, Buddhima Indraratna, Ngoc Trung Ngo, Matthew Coop
Faculty of Engineering - Papers (Archive)
This paper presents a laboratory study of interface behavior between ballast and geogrid under various degree of fouling by coal fines. The stress-displacement behaviour of fresh and fouled ballast with geogrid was investigated through a series of large-scale direct shear tests where the fouling degree varied from 0% to 95% Void Contamination Index (VCI), at normal stresses ranging from 15kPa to 75kPa. The results showed that geogrid enhances the shear strength and increases apparent angle of shearing resistance, while only slightly reduces the vertical displacement of the composite geogrid-ballast system. However, when ballast was contaminated by coal fines, the influences …
Experimental Study On Adhesion Of Oxide Scale On Hot-Rolled Steel Strip, Xianglong Yu, Dongbin Wei, Xiaodong Wang, Zhengyi Jiang
Experimental Study On Adhesion Of Oxide Scale On Hot-Rolled Steel Strip, Xianglong Yu, Dongbin Wei, Xiaodong Wang, Zhengyi Jiang
Faculty of Engineering - Papers (Archive)
An experimental method was developed to study the adherence properties of the oxide scale formed on microalloyed low carbon steel after hot strip rolling. The evolution of the oxide scale during laminar cooling was investigated using Gleeble 3500 Thermal-Mechanical Simulator connected with a humid air generator. After the sample cooled down to ambient temperature, the oxide scale was protected by lacquer to prevent the scale from losing. Physicochemical characteristics of the oxide scale were examined and the adherence mechanism was discussed. Decomposed wustite a mixture of α-iron and magnetite (Fe3O4), can substantially improve the integrity of …
Charge Carrier Exchange At Chemically Modified Graphene Edges: A Density Functional Theory Study, Ting Liao, Chenghua Sun, Aijun Du, Ziqi Sun, Denisa Hulicova-Jurcakova, Sean Smith
Charge Carrier Exchange At Chemically Modified Graphene Edges: A Density Functional Theory Study, Ting Liao, Chenghua Sun, Aijun Du, Ziqi Sun, Denisa Hulicova-Jurcakova, Sean Smith
Faculty of Engineering - Papers (Archive)
Heteroatom doping on the edge of graphene may serve as an effective way to tune chemical activity of carbon-based electrodes with respect to charge carrier transfer in an aqueous environment. In a step towards developing mechanistic understanding of this phenomenon, we explore herein mechanisms of proton transfer from aqueous solution to pristine and doped graphene edges utilizing density functional theory. Atomic B-, N-, and O- doped edges as well as the native graphene are examined, displaying varying proton affinities and effective interaction ranges with the H3O+ charge carrier. Our study shows that the doped edges characterized by more dispersive orbitals, …
Study On A Seawater Hydraulic Piston Pump With Check Valves For Underwater Tools, X He, B Zhu, Y Liu, Z Jiang
Study On A Seawater Hydraulic Piston Pump With Check Valves For Underwater Tools, X He, B Zhu, Y Liu, Z Jiang
Faculty of Engineering - Papers (Archive)
The aim of this study is to develop a seawater hydraulic piston pump for the power pack of an underwater tool system. A pump with check valves and oil–water-separated structure was selected for the purpose of improving its tolerance to particles when applied in open-circuit system. A novel ‘anti-loosening’ structure was introduced for the piston/shoe assembly. To improve the anti-wear and anti-corrosion performances of the piston and sleeve pairs under seawater lubrication, carbon fibre-reinforced polyetheretherketone was injected as an inner of the sleeve, and synthesized WC was formed on the piston with improved surface hardness. The unbalance problem of the …
Study Of Vacancy-Type Defects By Positron Annihilation In Ultrafine-Grained Aluminum Severely Deformed At Room And Cryogenic Temperatures, L H. Su, Cheng Lu, Lizi He, L C. Zhang, P Guagliardo, A K. Tieu, S N. Samarin, J F. Williams, H J. Li
Study Of Vacancy-Type Defects By Positron Annihilation In Ultrafine-Grained Aluminum Severely Deformed At Room And Cryogenic Temperatures, L H. Su, Cheng Lu, Lizi He, L C. Zhang, P Guagliardo, A K. Tieu, S N. Samarin, J F. Williams, H J. Li
Faculty of Engineering - Papers (Archive)
"Commercial-purity aluminum was processed by equal-channel angular pressing (ECAP) at room temperature (RT-ECAP) and cryogenic temperature (CT-ECAP) with liquid nitrogen cooling between two successive passes.It was found that the RT-ECAPed samples showed equiaxed microstructure after 4 and 8 ECAP passes, while the CT-ECAPed samples displayed slightly elongated microstructure and slightly smaller grain size.Moreover, the CT-ECAPed samples had higher hardness values than the RT-ECAPed samples subjected to the same amount of deformation.Positron annihilation lifetime spectroscopy (PALS) was used to investigate the evolution of vacancy-type defects during the ECAP deformation process.The results showed that three types of defects existed in the ECAPed …
Large Area Silicon Microdosimeter For Dosimetry In High Let Space Radiation Fields: Charge Collection Study, Jayde Livingstone, Dale A. Prokopovich, Michael L. F Lerch, Marco Petasecca, Mark I. Reinhard, Hiroshi Yasuda, Marco Zaider, James F. Ziegler, Vincent L. Pisacane, John F. Dicello, Vladimir L. Perevertaylo, Anatoly B. Rosenfeld
Large Area Silicon Microdosimeter For Dosimetry In High Let Space Radiation Fields: Charge Collection Study, Jayde Livingstone, Dale A. Prokopovich, Michael L. F Lerch, Marco Petasecca, Mark I. Reinhard, Hiroshi Yasuda, Marco Zaider, James F. Ziegler, Vincent L. Pisacane, John F. Dicello, Vladimir L. Perevertaylo, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
Silicon microdosimeters for the characterisation of mixed radiation fields relevant to the space radiation environment have been under continual development at the Centre for Medical Radiation Physics for over a decade. These devices are useful for the prediction of single event upsets in microelectronics and for radiation protection of spacecraft crew. The latest development in silicon microdosimetry is a family of large-area n-SOI microdosimeters for real-time dosimetry in space radiation environments. The response of n-SOI microdosimeters to 2 MeV H and 5.5 MeV He ions has been studied to investigate their charge collection characteristics. The studies have confirmed 100% yield …
Hot Deformation Of Cast And Extruded Tial: An In-Situ Diffraction Study, Thomas Schmoelzer, Klaus-Dieter Liss, Svea Mayer, Kun Yan, Mark H. Reid, Rian J. Dippenaar, Matthew Peel, Helmut Clemens
Hot Deformation Of Cast And Extruded Tial: An In-Situ Diffraction Study, Thomas Schmoelzer, Klaus-Dieter Liss, Svea Mayer, Kun Yan, Mark H. Reid, Rian J. Dippenaar, Matthew Peel, Helmut Clemens
Faculty of Engineering - Papers (Archive)
Intermetallic TiAl alloys are a class of innovative high-temperature materials which are developed to replace the substantially denser Ni-base alloys in low-pressure turbine blades of jet engines. By streamlining the production process of these parts, a substantial decrease in production costs can be achieved. To this end, a profound knowledge of the microstructural processes occurring during hot deformation is a prerequisite. To investigate the microstructural development during forming operations, cast and extruded as well as only cast specimens were hot-deformed and the microstructural development investigated in-situ by means of a novel diffraction method. This powder diffraction method utilizes the behavior …
Neutron Diffraction Study Of The Magnetic Order In Ndmn2ge1.6si0.4, Jianli Wang, Stewart J. Campbell, John M. Cadogan, A J Studer, Rong Zeng, S. X. Dou
Neutron Diffraction Study Of The Magnetic Order In Ndmn2ge1.6si0.4, Jianli Wang, Stewart J. Campbell, John M. Cadogan, A J Studer, Rong Zeng, S. X. Dou
Faculty of Engineering - Papers (Archive)
Here we report a detailed investigation of NdMn2Ge1.6Si0.4; this forms part of our investigation of the magnetic order across the NdMn2Ge2−xSix (x = 0–2.0) series by magnetometry, x-ray diffraction and neutron diffraction over the temperature range 6–465 K. On decreasing the temperature from 465 K, NdMn2Ge1.6Si0.4 exhibits four magnetic transitions: (i) from paramagnetism to intralayer antiferromagnetism AFl at TIntraN ~ 430 K; (ii) AFl to canted ferromagnetism Fmc at TInterC ~ 330 K; (iii) Fmc to conical magnetic ordering …
Study On Solidification During Twin-Roll Casting Of Magnesium Alloy, Yucheng Zhang, X Cheng, D Wei, Xiaolin Wang, Z Jiang
Study On Solidification During Twin-Roll Casting Of Magnesium Alloy, Yucheng Zhang, X Cheng, D Wei, Xiaolin Wang, Z Jiang
Faculty of Engineering - Papers (Archive)
The process of vertical twin-roll casting including pouring, solidifying, roiling and cooling can be accomplished In a very short time. Some Important process parameters In roll casting that are difficult to be obtained experimentally may be acquired by employing numerical simulation. In this paper, a numerical simulation has been conducted based on a 20 finite element model of vertical twin-roil ab1p casting coupling temperature, flow, and thermal stress. The Influences of key process parameters Including submerged nozzle depth and nozzle spray angle have been studied. The distribution of thermal stress was obtained and Its effect on the cracks In the …
Experimental Study Of High-Strength Concrete Columns Confined With Different Types Of Mesh Under Eccentric And Concentric Loads, Muhammad N. S Hadi, Hua Zhao
Experimental Study Of High-Strength Concrete Columns Confined With Different Types Of Mesh Under Eccentric And Concentric Loads, Muhammad N. S Hadi, Hua Zhao
Faculty of Engineering - Papers (Archive)
A new idea is investigated in this study to reduce the cover spalling of high-strength concrete columns: installing relatively cheap materials such as household fly screen and wire mesh in the formwork of RC columns. Three materials were chosen in this study: fiberglass fly mesh (FGFM), standard aluminum fly mesh (SAFM), and 12:7 x 12:7 galvanized steel wire mesh (S12.7 WM). A total of 16 cylindricalspecimens with a length of 925 mm and a diameter of 205 mm were cast and tested under concentric, eccentric, and pure bending loading. The testing results showed that S12.7 WM significantly improved the load-carrying …
Experimental Study On The Effectiveness Of Prefabricated Vertical Drains Under Cyclic Loading, Cholachat Rujikiatkamjorn, Buddhima Indraratna, Guanghui Meng
Experimental Study On The Effectiveness Of Prefabricated Vertical Drains Under Cyclic Loading, Cholachat Rujikiatkamjorn, Buddhima Indraratna, Guanghui Meng
Faculty of Engineering - Papers (Archive)
This study is an attempt to investigate the effectiveness of a prefabricated vertical drain (PVD) installed in remoulded soft clay, where a large-scale cyclic triaxial process simulation rig was employed to simulate cyclic loading representing a track environment. The experimental data show that PVD successfully prevents excessive accumulation of pore water pressure during cyclic loading, and their dissipation continues to occur after the load is removed. The findings of this study have direct significance to rail track environments, e.g. in coastal Australia, where PVD installation beneath rail tracks constructed on low-lying estuarine soils has been recently adopted.
A Study Of The Continous Cooling Behaviour And Effect Of Preheat And Interpass Temperature On The Haz Of High Strength Quenched And Tempered Steel, Lenka Kuzmikova, Mark Callaghan, Nathan Larkin, Robert Scott, Robert De Jong, Huijun Li, John Norrish
A Study Of The Continous Cooling Behaviour And Effect Of Preheat And Interpass Temperature On The Haz Of High Strength Quenched And Tempered Steel, Lenka Kuzmikova, Mark Callaghan, Nathan Larkin, Robert Scott, Robert De Jong, Huijun Li, John Norrish
Faculty of Engineering - Papers (Archive)
In this study, the continuous cooling phase transformation behaviour of a quenched and tempered armour steel was investigated. A continuous cooling transformation diagram was constructed providing valuable information for predicting microstructural evolution and mechanical properties at different cooling rates during actual welding fabrication. Welding trials were carried out utilising flux-cored arc welding technique in combination with an austenitic stainless steel consumable. The effect of various preheat and interpass temperatures on cooling rate and consequently on the heat affected zone microstructure and mechanical properties of multipass welds were investigated.
Some Comments On The Study Of Metallurgical Coke And Its Use In The Iron Blast Furnace: Understanding Process Fundamentals Through Laboratory Studies, Brian J. Monaghan, Michael Chapman, Sharon A. Nightingale, John G. Mathieson, Robert J. Nightingale
Some Comments On The Study Of Metallurgical Coke And Its Use In The Iron Blast Furnace: Understanding Process Fundamentals Through Laboratory Studies, Brian J. Monaghan, Michael Chapman, Sharon A. Nightingale, John G. Mathieson, Robert J. Nightingale
Faculty of Engineering - Papers (Archive)
Much of the recent experimental work carried out at by the PYROmetallurgical group at the University of Wollongong has focussed on understanding coke behaviour in the lower zone of the blast furnace. This work has had both fundamental and applied elements and has been carried out with a view to improving coke utilization in the blast furnace and ultimately reducing greenhouse gas emissions.
Study On Edge Crack Propagation During Cold Rolling Of Thin Strip By Fem, Haibo Xie, Zhengyi Jiang, Dongbin Wei, A. K. Tieu
Study On Edge Crack Propagation During Cold Rolling Of Thin Strip By Fem, Haibo Xie, Zhengyi Jiang, Dongbin Wei, A. K. Tieu
Faculty of Engineering - Papers (Archive)
Edge crack is one common phenomenon in cold rolling of thin strip which affects qualities of the rolled strip. A three‐dimensional elastic‐plastic finite element (FE) model for cold flat product rolling has been developed to simulate the edge crack propagation during rolling. Stress field is investigated around the edge crack tip, and the effects of the friction coefficient, the initial crack size, reductions on crack propagation are analysed. The FE simulation provides a better understanding of the crack growth at the edge of thin strip, and could be helpful in developing of cold rolled strip with high performance mechanical properties. …
A Study Of The Strength Of Lime Treated Soft Clays, Martin D. Liu, Stephen Pemberton, Buddhima Indraratna
A Study Of The Strength Of Lime Treated Soft Clays, Martin D. Liu, Stephen Pemberton, Buddhima Indraratna
Faculty of Engineering - Papers (Archive)
In this paper, a comprehensive study of the strength of lime treated soft clays is made. There are three major factors that affect the strength of the soils; they are the lime content, curing time, and curing temperature. The variations of soil strengths with the three factors are analysed and quantified via proposed empirical equations. These equations are verified against experimental data. Finally, a general strength criterion, unifying the influence of all the three factors into a single equation, is proposed. The capacity of the general equation is also demonstrated. It is seen that the proposed strength equations can provide …
Evolutionary Modeling For Streamflow Forecasting With Minimal Datasets: A Case Study In The West Malian River, China, Qingwei Ni, Li Wang, Renzhen Ye, Fenglin Yang, Muttucumaru Sivakumar
Evolutionary Modeling For Streamflow Forecasting With Minimal Datasets: A Case Study In The West Malian River, China, Qingwei Ni, Li Wang, Renzhen Ye, Fenglin Yang, Muttucumaru Sivakumar
Faculty of Engineering - Papers (Archive)
A large data set is generally needed when modeling hydrological processes. However, for developing countries such as China, data sets are often unavailable in remote areas. An attempt to apply a novel genetic programming (GP) technique was made to model the relationship between streamflow of the West Malian River and the impact of climate change in the northeastern part of China. Available annual streamflow and climatic data were used for training and testing of the GP model. Data from the years between 1982 and 2002 were used for automatic selection of the model relationship. Prediction of the model was undertaken …
In Situ Study Of Dynamic Recrystallization And Hot Deformation Behavior Of A Multiphase Titanium Aluminide Alloy, Klaus-Dieter Liss, Thomas Schmoelzer, Kun Yan, Mark H. Reid, Matthew Peel, Rian J. Dippenaar, Helmut Clemens
In Situ Study Of Dynamic Recrystallization And Hot Deformation Behavior Of A Multiphase Titanium Aluminide Alloy, Klaus-Dieter Liss, Thomas Schmoelzer, Kun Yan, Mark H. Reid, Matthew Peel, Rian J. Dippenaar, Helmut Clemens
Faculty of Engineering - Papers (Archive)
Hot-compression tests were conducted in a high-energy synchrotron x-ray beam to study in situ and in real time microstructural changes in the bulk of a β-solidifying titanium aluminide alloy. The occupancy and spottiness of the diffraction rings have been evaluated in order to access grain growth and refinement, orientation relationships, subgrain formation, dynamic recovery, and dynamic recrystallization, as well as phase transformations. This method has been applied to an alloy consisting of two coexisting phases at high temperature and it was found that the bcc β-phase recrystallizes dynamically, much faster than the hcp α-phase, which deforms predominantly …
First-Principles Study On The Enhancement Of Lithium Storage Capacity In Boron Doped Graphene, Xianlong Wang, Zhi Zeng, Hyojun Ahn, Guoxiu Wang
First-Principles Study On The Enhancement Of Lithium Storage Capacity In Boron Doped Graphene, Xianlong Wang, Zhi Zeng, Hyojun Ahn, Guoxiu Wang
Faculty of Engineering - Papers (Archive)
The adsorption of Li ions on boron doped graphene was investigated using a first-principles method. Our results show that, as boron doping turns graphene into an electron-deficient system, more Li ions can be captured around boron doped centers than in pristine graphene. One boron atom doped into graphene (6C ring unit) can adsorb six Li ions, which indicates that boron doped graphene is an efficient Li-ion storage material for lithium batteries. Further investigations show that, under limited conditions, boron doped graphene (BC5) can form Li6BC5 compound after Li-ion adsorption, corresponding to a lithium storage capacity …
A Comparative Study On Field, Temperature, And Strain Dependences Of The Critical Current For Doped And Undoped Mgb2 Wires Based On The Percolation Model, Sangjun Oh, Jung Ho Kim, Kyuhwan Cho, Chulhee Lee, Chan-Joong Kim, S. X. Dou, M Rindfleisch, Mike Tomsic, Jung-Ho Ahn
A Comparative Study On Field, Temperature, And Strain Dependences Of The Critical Current For Doped And Undoped Mgb2 Wires Based On The Percolation Model, Sangjun Oh, Jung Ho Kim, Kyuhwan Cho, Chulhee Lee, Chan-Joong Kim, S. X. Dou, M Rindfleisch, Mike Tomsic, Jung-Ho Ahn
Faculty of Engineering - Papers (Archive)
Field, temperature, and strain dependences of the critical current for a SiC doped multifilamentary in situ MgB2 wire have been studied. Measurement results were compared with that of the undoped wire, and the origin of the difference in the critical current is discussed. The critical current can be calculated with the percolation model considering the effect of anisotropy. The temperature dependence of the fitting parameters, the upper critical field along the ab-plane, and c-axis is compared with the dirty-limit two-gap theory. To assess the validity of the fitting parameters, resistive transition has been measured especially to …
Study On A Magnetorheological Fluid Bladder Spring For Isolation System, Xianzhou Zhang, Weihua Li, Xingyu Wang
Study On A Magnetorheological Fluid Bladder Spring For Isolation System, Xianzhou Zhang, Weihua Li, Xingyu Wang
Faculty of Engineering - Papers (Archive)
Vibration reduction and isolation plays an important role in protecting machinery and structures from unwanted vibration related problems. A variety of passive and active isolation systems have been developed for vibration suppression. However, passive systems are only effective for narrow frequencies while passive systems usually have high costs.
Raman Study Of Element Doping Effects On The Superconductivity Of Mgb2, Wenxian Li, Yongqing Li, R H. Chen, Rong Zeng, S. X. Dou, M Y. Zhu, H M. Jin
Raman Study Of Element Doping Effects On The Superconductivity Of Mgb2, Wenxian Li, Yongqing Li, R H. Chen, Rong Zeng, S. X. Dou, M Y. Zhu, H M. Jin
Faculty of Engineering - Papers (Archive)
The influences of phonon frequency and unit cell volume on the superconductivity of element-doped MgB2 are discussed with reference to a Raman study on SiC, C, Mn, and Al-Ag-doped Mg-B materials. A phenomenon has been found in the doped samples, in that the phonon frequency changes to counteract the crystal lattice variation to keep the system stable within a Grüneisen parameter of 2.0–4.0. The chemical doping effects on phonon frequency and unit cell volume can be explained by the harmonicity-anharmonicity competition in the compounds. A decreased electronic density of states is responsible for the depression of superconductivity that is …
Calibrating Engineering Graduate Capabilities Against Assessment Tasks: A Preliminary Study, Long Nghiem, Maureen E. Bell
Calibrating Engineering Graduate Capabilities Against Assessment Tasks: A Preliminary Study, Long Nghiem, Maureen E. Bell
Faculty of Engineering - Papers (Archive)
This paper investigated the connection between assessment tasks and graduate capabilities. Surveys conducted as part of this study revealed differences in planning for the development of, and student achievement of, graduate capabilities and that assessment tasks were valuable tools to guide and facilitate the development of intended graduate capabilities. Drawing from the obtained data, a prototype framework for curriculum design was proposed, allowing for better alignment of assessment tasks and graduate capability development in systematic subject design.
Experimental And Numerical Study Of Double Shearing Of Bolt Under Confinement, Najdat I. Aziz, Hossein Jalalifar
Experimental And Numerical Study Of Double Shearing Of Bolt Under Confinement, Najdat I. Aziz, Hossein Jalalifar
Faculty of Engineering - Papers (Archive)
The shear behaviour of reinforced rock joints is investigated for the bolt-grout-rock interaction and for failure mechanism. The effectiveness of the bolt application under lateral and axial loading conditions within surrounding materials is investigated in different medium strength. Double shearing testing of bolts were studied in concrete blocks of 20, 40, 50 and 100 MPa strengths, subjected to different pretension loads of 0, 5, 10, 20, 50 and 80 KN respectively. The experimental study was complemented with three-dimensional numerical analysis. Parameters examined include: shear resistance, shear displacement, induced strains and stresses during bolt bending process and its ultimate failure across …
Simulation Study Of Quadrupole Dielectrophoretic Trapping, Weihua Li, J Sun, B Liu, X Z. Zhang
Simulation Study Of Quadrupole Dielectrophoretic Trapping, Weihua Li, J Sun, B Liu, X Z. Zhang
Faculty of Engineering - Papers (Archive)
This paper presents a numerical study of particle trapping using quadrupole microfludic dielectrophoretic device. By taking into account the dielectrophoreis, viscous drag, the trajectory of particles flowing through the quadrupole device was obtained. Simulation results show that the device is effective for negative trapping, where particles are effectively trapped at the device centre. The device geometry is optimized by maximizing the dielectrophoretic force.
A Feasibility Study Of Recycling Of Manganese Furnace Dust, Ruihua Shen, Guangqing Zhang, Mark Dell'amico, Peter Brown, Oleg Ostrovski
A Feasibility Study Of Recycling Of Manganese Furnace Dust, Ruihua Shen, Guangqing Zhang, Mark Dell'amico, Peter Brown, Oleg Ostrovski
Faculty of Engineering - Papers (Archive)
This paper presents results of a feasibility study of recycling manganese furnace dust generated in production of ferromanganese and silicomanganese at Tasmanian Electrometallurgical Company, Australia. Dried manganese furnace dust contains about 20 wt% of carbon, in average 33.4 wt% of manganese and 1.3 wt% of zinc. Manganese in the dust is in the form of MnO, Mn3O4 and MnCO3; zinc is mainly in the form of ZnO and ZnSO4. Analysis of the zinc balance with dust recycling showed that to keep zinc intake at the acceptable level, it should be partly removed from the dust. In the reduction laboratory experiments, …
Case Study Approach In Operations Management Research, Senevi B. Kiridena, Anneke Fitzgerald
Case Study Approach In Operations Management Research, Senevi B. Kiridena, Anneke Fitzgerald
Faculty of Engineering - Papers (Archive)
No abstract provided.
Viscoelastic Study Of Conducting Polymers Using Quartz Crystal Microbalance, Mehrdad Bahrami Samani, Philip G. Whitten, Geoffrey M. Spinks, Christopher David Cook
Viscoelastic Study Of Conducting Polymers Using Quartz Crystal Microbalance, Mehrdad Bahrami Samani, Philip G. Whitten, Geoffrey M. Spinks, Christopher David Cook
Faculty of Engineering - Papers (Archive)
Application of conducting polymers has been growing widely in different fields such as batteries, solar cells, capacitors and actuators. Mechanical properties of conducting polymers like flexibility, high power to mass ratio and high active strain make them potentially applicable to robotic and automation industries. Obviously, a dynamic model of the actuation phenomenon in conducting polymers is needed to study its controllability and also to optimize the mechanical performance. De Rossi and colleagues suggest treating the mechanical behaviour of conducting polymers separately from the viscoelastic structural model and electrochemical actuation[1]. But it has been observed that the effects of electrochemical actuation …