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Articles 61 - 90 of 1664
Full-Text Articles in Engineering
Ultra Fast Mas Solid-State Nmr Studies Of Protein-Protein Interactions In The Bacterial Replisome, M Felletti, S Jehle, Y Wang, Kiyoshi Ozawa, S Jergic, G Otting, L Emsley, A Lesage, N Dixon, G Pintacuda
Ultra Fast Mas Solid-State Nmr Studies Of Protein-Protein Interactions In The Bacterial Replisome, M Felletti, S Jehle, Y Wang, Kiyoshi Ozawa, S Jergic, G Otting, L Emsley, A Lesage, N Dixon, G Pintacuda
Faculty of Engineering - Papers (Archive)
Replication of genomic DNA in bacteria involves multiple stable and transient interactions among protein subunits constituting the replisome. Here we show how ultra-fast magic angle spinning (MAS) solid-state NMR (ssNMR) and 1H-detection on either deutereted or fully protonated samples, can give new information about protein-protein interactions in the E. coli replisome. We focused on two fundamental interactions: the first one between the C-terminal domain of the single-stranded (ss) DNA binding protein and its own DNA-binding site, and the second one between the DNA polymerase III subunits a and s. SSB (a tetramer of 79 kDa) has a structurally well-defined ssDNA …
Synthesis Of Uniform Tio2@Carbon Composite Nanofibers As Anode For Lithium Ion Batteries With Enhanced Electrochemical Performance, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Synthesis Of Uniform Tio2@Carbon Composite Nanofibers As Anode For Lithium Ion Batteries With Enhanced Electrochemical Performance, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Faculty of Engineering - Papers (Archive)
Very large area, uniform TiO2@carbon composite nanofibers were easily prepared by thermal pyrolysis and oxidization of electrospun titanium(IV) isopropoxide/polyacrylonitrile (PAN) nanofibers in argon. The composite nanostructures exhibit the unique feature of having TiO2 nanocrystals encapsulated inside a porous carbon matrix. The unique orderly-bonded nanostructure, porous characteristics, and highly conductive carbon matrix favour excellent electrochemical performance of the TiO2@carbon nanofiber electrode. The TiO2@carbon hybrid nanofibers exhibited highly reversible capacity of 206 mAh g−1 up to 100 cycles at current density of 30 mA g−1 and excellent cycling stability, indicating that the composite is a promising anode candidate for Li-ion batteries.
Electrochemical Characteristics Of Layered Li1.95mn0.9co0.15o3 (C2/M) As A Lithium-Battery Cathode, Kiyoshi Ozawa, Yasuhiro Nakao, Takashi Mochiku, Zhenxiang Cheng, Lianzhou Wang, Hideo Iwai, Yoshinori Tsuchiya, Hiroki Fujii, Naoki Igawa
Electrochemical Characteristics Of Layered Li1.95mn0.9co0.15o3 (C2/M) As A Lithium-Battery Cathode, Kiyoshi Ozawa, Yasuhiro Nakao, Takashi Mochiku, Zhenxiang Cheng, Lianzhou Wang, Hideo Iwai, Yoshinori Tsuchiya, Hiroki Fujii, Naoki Igawa
Faculty of Engineering - Papers (Archive)
A manganese-based solid solution with the composition of Li(1.95)Mn(0.9)Co(0.15)O(3) was synthesized by a simplified coprecipitation method, followed by a combustion technique, and its electrochemical characteristics as a lithium-battery cathode were investigated. Rietveld refinement based on neutron diffraction data revealed that the material is assigned to an Li(2)MnO(3)-type structure model with a monoclinic cell due to the space group symmetry of C2/m. In cycling of the Li/Li(+)/Li(1.95)Mn(0.9)Co(0.15)O(3) cell in the potential range of 2.0-4.8 V at current densities of 30 mAg(-1), the discharge capacity characteristically increases from 46.3 to 196.5mAhg(-1) as the cycle increases from 1 to 11, and a discharge …
Experimental Realization Of Superconducting Quantum Interference Devices With Topological Insulator Junctions, M Veldhorst, C G. Molenaar, Xiaolin Wang, H Hilgenkamp, A Brinkman
Experimental Realization Of Superconducting Quantum Interference Devices With Topological Insulator Junctions, M Veldhorst, C G. Molenaar, Xiaolin Wang, H Hilgenkamp, A Brinkman
Faculty of Engineering - Papers (Archive)
We demonstrate topological insulator (Bi2Te3) dc SQUIDs, based on superconducting Nb leads coupled to nano-fabricated Nb-Bi2Te3-Nb Josephson junctions. The high reproducibility and controllability of the fabrication process allow the creation of dc SQUIDs with parameters that are in agreement with design values. Clear critical current modulation of both the junctions and the SQUID with applied magnetic fields have been observed. We show that the SQUIDs have a periodicity in the voltage-flux characteristic of U0 of relevance to the ongoing pursuit of realizing interferometers for the detection of Majorana fermions in superconductor—topological insulator structures.
Facile Synthesis Of A Interleaved Expanded Graphite-Embedded Sulphur Nanocomposite As Cathode Of Li-S Batteries With Excellent Lithium Storage Performance, Yun-Xiao Wang, Ling Huang, Li-Chao Sun, Su-Yuan Xie, Gui-Liang Xu, Shu-Ru Chen, Yue-Feng Xu, Jun-Tiao Li, Shulei Chou, S. X. Dou, Shi-Gang Sun
Facile Synthesis Of A Interleaved Expanded Graphite-Embedded Sulphur Nanocomposite As Cathode Of Li-S Batteries With Excellent Lithium Storage Performance, Yun-Xiao Wang, Ling Huang, Li-Chao Sun, Su-Yuan Xie, Gui-Liang Xu, Shu-Ru Chen, Yue-Feng Xu, Jun-Tiao Li, Shulei Chou, S. X. Dou, Shi-Gang Sun
Faculty of Engineering - Papers (Archive)
This paper reports the facile synthesis of a unique interleaved expanded graphite-embedded sulphur nanocomposite (S-EG) by melt-diffusion strategy. The SEM images of the S-EG materials indicate the nanocomposites consist of nanosheets with a layer-by-layer structure. Electrochemical tests reveal that the nanocomposite with a sulphur content of 60% (0.6S-EG) can deliver the highest discharge capacity of 1210.4 mAh g−1 at a charge–discharge rate of 280 mA g−1 in the first cycle, the discharge capacity of the 0.6S-EG remains as high as 957.9 mAh g−1 after 50 cycles of charge–discharge. Furthermore, at a much higher charge–discharge rate of 28 A g−1, the …
Crossing Point Phenomena () In Specific Heat Curves Of Superconducting Ferromagnets, Anuj Kumar, R P. Tandon, Jianli Wang, Rong Zeng, V P. S Awana
Crossing Point Phenomena () In Specific Heat Curves Of Superconducting Ferromagnets, Anuj Kumar, R P. Tandon, Jianli Wang, Rong Zeng, V P. S Awana
Faculty of Engineering - Papers (Archive)
Crossing point phenomena are one of the interesting and still puzzling effects in strongly correlated electron systems. We have synthesized RuSr2Gd1.4Ce0.6Cu2O10-delta (GdRu-1222) magneto-superconductor through the standard solid state reaction route and measured its magnetic, transport, and thermal properties. We also synthesized RuSr2Eu1.4Ce0.6Cu2O10-delta (EuRu-1222) then measured its heat capacity in zero magnetic fields for reference. The studied compounds crystallized in the tetragonal structure with space group I4/mmm. To explore the crossing point phenomena, the specific heat [C-p (T)] was investigated in the temperature range 1.9-250 K, under magnetic field of up to 70 kOe. Unfortunately though no magnetic and superconducting transitions …
Enhancement Of The Electrochemical Capacitance Of Tio2 Nanotube Arrays Through Controlled Phase Transformation Of Anatase To Rutile, Maryam Salari, Seyed Hamed Aboutalebi, Alfred T. Chidembo, Ivan P. Nevirkovets, Konstantin Konstantinov, Hua-Kun Liu
Enhancement Of The Electrochemical Capacitance Of Tio2 Nanotube Arrays Through Controlled Phase Transformation Of Anatase To Rutile, Maryam Salari, Seyed Hamed Aboutalebi, Alfred T. Chidembo, Ivan P. Nevirkovets, Konstantin Konstantinov, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
Here, we report the fabrication of self-organized titania (TiO2) nanotube array supercapacitor electrodes through controlled phase transformation of TiO2, with aerial capacitances as high as 2.6 mF cm -2, which far exceeds the values so far reported in the literature. The role of phase transformation in the electrochemical charge–discharge behaviour of nanocrystalline TiO2 nanotubes is investigated and discussed in detail. The ease of synthesis and the exceptional electrochemical properties make these nanotube arrays an alternative candidate for use in energy storage devices.
A New Building Scheme To Resist Progressive Collapse, Muhammad N. S Hadi, Thaer M. Saeed Alrudaini
A New Building Scheme To Resist Progressive Collapse, Muhammad N. S Hadi, Thaer M. Saeed Alrudaini
Faculty of Engineering - Papers (Archive)
In this paper, a new scheme is proposed for retrofitting RC buildings to resist progressive collapse that may result from a first floor column failure. The proposed scheme is comprised of placing vertical cables connected at the ends of beams and hung on a hat steel braced frame seated on top of the building. In case of a column collapse, the cables transfer the residual loads above the failed column to the hatbraced frame, which, in turn, redistributes these loads to the adjacent columns. A finite-element modeling and a nonlinear dynamic analysis following the alternate path method (APM), as recommended …
Class A Prediction Of A Piled Relieving Slab Using Uncoupled Models, David Oliveira, Dan Gorman, Frances Badelow
Class A Prediction Of A Piled Relieving Slab Using Uncoupled Models, David Oliveira, Dan Gorman, Frances Badelow
Faculty of Engineering - Papers (Archive)
Construction of the new Windsor Road on/off ramps, part of the M2 Upgrade project, required limiting the loads and movements imposed on existing precast concrete walls so that no additional pressure was applied as a result of the new construction works. This was necessary due to possible structural deficiencies of some of the existing reinforced concrete elements. A piled relieving slab was adopted as the final solution to support the reinforced soil wall ramps and a comprehensive soil-structure interaction assessment was carried out in order to predict the pile head deflections and assess potential loading of the existing walls. A …
Frontier Technologies In Design And Construction For Sustainable Transport Infrastructure, Buddhima Indraratna, Sanjay Shrawan Nimbalkar, Cholachat Rujikiatkamjorn
Frontier Technologies In Design And Construction For Sustainable Transport Infrastructure, Buddhima Indraratna, Sanjay Shrawan Nimbalkar, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
Railways are expected to be one of the main modes of future transport in rapidly developing countries with high population densities, including Sri Lanka. In spite of recent advances in rail track geotechnology, ballasted tracks progressively degrade under heavy cyclic and impact loading. Field studies often provide significant knowledge to better understand track performance and to extend the current state-of-the-art in design. Therefore, comprehensive field trials were carried out on two instrumented rail tracks in Bulli and in Singleton, New South Wales, Australia. In these studies, several track sections were reinforced with different types of geosynthetics placed beneath the ballast …
State-Of-The-Art Design Aspects Of Ballasted Rail Tracks Incorporating Particle Breakage, Fouling, And The Benefits Of Geosynthetic Reinforcement, Buddhima Indraratna, Sanjay Nimbalkar, Michael Martin, Tim Neville, Cholachat Rujikiatkamjorn
State-Of-The-Art Design Aspects Of Ballasted Rail Tracks Incorporating Particle Breakage, Fouling, And The Benefits Of Geosynthetic Reinforcement, Buddhima Indraratna, Sanjay Nimbalkar, Michael Martin, Tim Neville, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
No abstract provided.
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 …
Photomixing In Topological Insulator Hgte/Cdte Quantum Wells In Terahertz Regime, Qinjun Chen, Yee Sin Ang, R A. Lewis, Xiaolin Wang, Chao Zhang
Photomixing In Topological Insulator Hgte/Cdte Quantum Wells In Terahertz Regime, Qinjun Chen, Yee Sin Ang, R A. Lewis, Xiaolin Wang, Chao Zhang
Faculty of Engineering - Papers (Archive)
We reveal that topological insulators (TI) HgTe/CdTe quantum well have a strong nonlinear optical property in the three-photon mixing. While the gapless surface state in TI can exhibit strong nonlinear effect due to the linear energy dispersion, the nonparabolic energy dispersion of the bulk state is responsible for the photo mixing effect reported here. To produce response at terahertz frequency regime from femtosecond electrical fields, the mixing efficiency is around 10 -4 comparable to that of nonlinear semiconductor crystals. The optimal temperature for this nonlinear effect is around 100K. The results suggest a potential application of TI in terahertz photonics.
Retro Reflection Of Electrons At The Interface Of Bilayer Graphene And Superconductor, Yee Sin Ang, Zhongshui Ma, C Zhang
Retro Reflection Of Electrons At The Interface Of Bilayer Graphene And Superconductor, Yee Sin Ang, Zhongshui Ma, C Zhang
Faculty of Engineering - Papers (Archive)
Electron reflection at an interface is a fundamental quantum transport phenomenon. The most famous electron reflection is the electronRhole Andreev reflection (AR) at a metal/superconductor interface. While AR can be either specular or retro-type, electronRelectron reflection is limited to only the specular type. Here we show that electrons can undergo retro-reflection in bilayer graphene (BLG). The underlying mechanism for this previously unknown process is the anisotropic constant energy band contour of BLG. The electron group velocity is fully reversed upon reflection, causing electrons to be retro-reflected. Utilizing a BLG/superconductor junction (BLG/S) as a model structure, we show that the unique …
Precipitation Behavior Of Magnetite In Oxide Scale During Cooling Of Microalloyed Low Carbon Steel, Xianglong Yu, Zhengyi Jiang, Daijun Yang, Dongbin Wei, Quan Yang
Precipitation Behavior Of Magnetite In Oxide Scale During Cooling Of Microalloyed Low Carbon Steel, Xianglong Yu, Zhengyi Jiang, Daijun Yang, Dongbin Wei, Quan Yang
Faculty of Engineering - Papers (Archive)
Precipitation behavior of magnetite particles in the thermal grown oxide scale during isothermal cooling of microalloyed low carbon steel was studied using scanning electron microscopy (SEM) and thin film X-ray. The oxide scale was generated from Gleeble 3500 Thermal-Mechanical Simulator connected with a humid air generator, to simulate 550 and 450°C isothermal treatments. Several types of magnetite precipitates were observed during different cooling processes with respect to the possible mechanisms of precipitation have been discussed. It is found that magnetite particles is as a result of pro-eutectoid precipitation from oxygen-rich wustite, and also as a product of the partial decomposition …
Observation Of Field-Induced Polarization Of Valleys In P-Type Sb 2te 3 Single Crystals, Z J. Yue, C B. Zhu, S X. Dou, Xiaolin Wang
Observation Of Field-Induced Polarization Of Valleys In P-Type Sb 2te 3 Single Crystals, Z J. Yue, C B. Zhu, S X. Dou, Xiaolin Wang
Faculty of Engineering - Papers (Archive)
A flow of carriers along the c axis is extremely sensitive to the orientation of an in-plane magnetic field due to in-plane mass anisotropy in layered compounds. Based on this mechanism, a rotatable in-plane magnetic field has been applied as a valley valve to tune the contribution of each valley in p-type Sb2Te3 bulk single crystals to the total conductivity and interlayer magnetoresistance (MR). A valley-polarized current is generated, and the angular-dependent interlayer MR of up to 160% represents strong anisotropy. There are six inequivalent peaks over all temperature and magnetic field ranges. The giant MR results …
Phase Development In Carbothermal Reduction And Nitridation Of Ilmenite Concentrates, Sheikh A. Rezan, Guangqing Zhang, Oleg Ostrovski
Phase Development In Carbothermal Reduction And Nitridation Of Ilmenite Concentrates, Sheikh A. Rezan, Guangqing Zhang, Oleg Ostrovski
Faculty of Engineering - Papers (Archive)
The phase development in the course of carbothermal reduction and nitridation of ilmentie concentrates and synthetic rutile was studied in temperature programmed reduction (623-1873 K) and isothermal reduction experiments. Ilmenites and synthetic rutile were reduced in a tube reactor with continuously flowing hydrogen-nitrogen mixture or pure nitrogen. The rate and extent of reduction were monitored by online off-gas analysis. Samples reduced to different extent were subjected to XRD and SEM/BSE analyses. Pseudorutile and ilmenite were the main phases in ilmenite concentrates; rutile was the main phase in synthetic rutile. Pseudorutile was first converted to ilmenite and titania which occurred at …
Laboratory Investigation On The Compactability Of Clean Sands, Gabriele Chiaro, Anna Gazzellone, Giuseppe Modoni
Laboratory Investigation On The Compactability Of Clean Sands, Gabriele Chiaro, Anna Gazzellone, Giuseppe Modoni
Faculty of Engineering - Papers (Archive)
Dynamic compaction induced by heavy impact or vibratory rollers is acknowledged as the most powerful process to increase the shear resistance and to reduce the deformability of granular materials. Ground improvement techniques based on this principle are currently adopted to build artificial embankments and to enhance the mechanical response of in-situ soils. In an attempt to clarify the role of grain size distribution on the compactability of granular materials, a systematic laboratory experimental investigation was undertaken on a variety of quartz-limestone sands. Samples were prepared with ten different grain size distributions, by mixing three selected uniform sands with variable percentage. …
Spatial Dispersion Management In Three-Dimensional Drawn Magnetic Metamaterials, Alessandro Tuniz, Benjamin Pope, Alexander Argyros, Simon Fleming, Anna Wang, Maryanne C. J Large, Elise M. Pogson, Roger A. Lewis, Avi Bendavid, Boris T. Kuhlmey
Spatial Dispersion Management In Three-Dimensional Drawn Magnetic Metamaterials, Alessandro Tuniz, Benjamin Pope, Alexander Argyros, Simon Fleming, Anna Wang, Maryanne C. J Large, Elise M. Pogson, Roger A. Lewis, Avi Bendavid, Boris T. Kuhlmey
Faculty of Engineering - Papers (Archive)
We characterize resonances of 3D fiber metamaterials under transmittance at oblique incidence. The resonance frequency of longitudinally invariant resonators increases with the incident angle, while the resonance of disconnected resonators does not. © 2012 OSA.
Microstructure And Mechanical Properties Of If Steel Deformed During Plane Stress Local Torsion, A H. Shamdani, S Khoddam, P F. Thomson, A Dehghan-Manshadi
Microstructure And Mechanical Properties Of If Steel Deformed During Plane Stress Local Torsion, A H. Shamdani, S Khoddam, P F. Thomson, A Dehghan-Manshadi
Faculty of Engineering - Papers (Archive)
Mechanical joints are inherently vulnerable to failure because the presence of the joint hole causes a stress concentration in the vicinity of the hole. The need for improvement of material strength around a fastener hole can be satisfied by severe plastic deformation (SPD) to produce ultrafine grains. The ultrafine grained (UFG) alloys produced by SPD processing possess higher strengths than their coarse-grained counterparts as a result of the reduced grain size. However, in some circumstances such as SPD processing of Al-Zn and Al-Mg alloys the decomposition of supersaturated solid solutions competes with the Hall-Petch effect and leads to a more …
Effect Of A Static Magnetic Field On Nanodosimetric Quantities In A Dna Volume, Peter Lazarakis, Marion U. Bug, Elisabetta Gargioni, Susanna Guatelli, Sabastien Incerti, Hans Rabus, Anatoly B. Rosenfeld
Effect Of A Static Magnetic Field On Nanodosimetric Quantities In A Dna Volume, Peter Lazarakis, Marion U. Bug, Elisabetta Gargioni, Susanna Guatelli, Sabastien Incerti, Hans Rabus, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
Abstract Purpose: With the advent of magnetic resonance imaging (MRI)-guided radiation therapy it is becoming increasingly important to consider the potential influence of a magnetic field on ionising radiation. This paper aims to study the effect of a magnetic field on the track structure of radiation to determine if the biological effectiveness may be altered. Methods: Using the Geant4-DNA (GEometry ANd Tracking 4) Monte Carlo simulation toolkit, nanodosimetric track structure parameters were calculated for electrons, protons and alpha particles moving in transverse magnetic fields up to 10 Tesla. Applying the model proposed by Garty et al., the track structure parameters …
Dependence Of Magnetoelectric Properties On Sintering Temperature For Nano-Sic-Doped Mgb2/Fe Wires Made By Combined In Situ/Ex Situ Process, Wenxian Li, Rong Zeng, Jiazhao Wang, Y Li, S. X. Dou
Dependence Of Magnetoelectric Properties On Sintering Temperature For Nano-Sic-Doped Mgb2/Fe Wires Made By Combined In Situ/Ex Situ Process, Wenxian Li, Rong Zeng, Jiazhao Wang, Y Li, S. X. Dou
Faculty of Engineering - Papers (Archive)
Very fine nano-SiC particles (nm) were doped into a MgB2 superconductor. The influence of self-field supercurrent on the high-field performance of the nano-SiC-doped MgB2/Fe wires is discussed based on comparison of the critical current densities of the in situ processed nano-SiCdoped MgB2 wires and those of the nano-SiC-doped MgB2/Fe wires processed by the combination of in situ/ex situ methods.
A Novel Three Degrees Of Freedom Partially Decoupled Robot With Linear Actuators, Gursel Alici, Jaime Gallardo-Alvarado, Ramon Rodrguez-Castro
A Novel Three Degrees Of Freedom Partially Decoupled Robot With Linear Actuators, Gursel Alici, Jaime Gallardo-Alvarado, Ramon Rodrguez-Castro
Faculty of Engineering - Papers (Archive)
In this work, a new translational robot formed with two different parallel manipulators with a common control point is introduced. An asymmetric parallel manipulator provides three translational degrees of freedom to the proposed robot while the orientation of the end-effector platform is kept constant by means of a Delta-like manipulator. An exact solution is easily derived to solve the forward displacement analysis while a semi-closed form solution is available for solving the inverse displacement analysis. The infinitesimal kinematics of the robot is approached by applying the theory of screws. Finally, a numerical example that consists of solving the inverse/forward displacement …
Application Of A Gac-Coated Hollow Fiber Module To Couple Enzymatic Degradation Of Dye On Membrane To Whole Cell Biodegradation Within A Membrane Bioreactor, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi
Application Of A Gac-Coated Hollow Fiber Module To Couple Enzymatic Degradation Of Dye On Membrane To Whole Cell Biodegradation Within A Membrane Bioreactor, Faisal I. Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi
Faculty of Engineering - Papers (Archive)
Additional granular activated carbon (GAC) layers on the membrane module within a whole cell fungal membrane bioreactor (MBR) set up to treat dye wastewater was effective in minimizing enzymewashout and in improvement of decoloration (degradation of the dye). Supporting batch tests and continuous monitoring of the quality of bioreactor-supernatant and membrane-penneate revealed that biodegradation was effected by both the suspended culture and the dynamically immobilized enzyme on the GAC-coated membrane. In a control MBR. the efficiency of dye removal was variable; in contrast. 85% to near complete removal of dye was achieved using the MBRs equipped with a membrane with …
Behaviour Of Frp Confined Concrete Cylinders Under Different Temperature Exposure, Muhammad N. S Hadi, B A. Louk Fanggi
Behaviour Of Frp Confined Concrete Cylinders Under Different Temperature Exposure, Muhammad N. S Hadi, B A. Louk Fanggi
Faculty of Engineering - Papers (Archive)
Bridge structures are exposed to the elements with a high variation in temperature. The purpose of this study is to investigate the effect of different high temperatures on the behaviour of concrete cylinders wrapped with Fibre Reinforced Polymer (FRP). Twelve concrete cylinders made of 60 MPa having 100 mm diameter and 200 mm height were cast and tested. The cylinders were divided into four groups: cylinders wrapped with a single CFRP layer, cylinders wrapped with two CFRP layers, cylinders wrapped with a single GFRP layer, and cylinders wrapped with two GFRP layers. Each group was exposed to temperatures of 20°C, …
A Review Of Localization Systems For Robotic Endoscopic Capsules, Trung Duc Than, Gursel Alici, Hao Zhou, Weihua Li
A Review Of Localization Systems For Robotic Endoscopic Capsules, Trung Duc Than, Gursel Alici, Hao Zhou, Weihua Li
Faculty of Engineering - Papers (Archive)
Obscure gastrointestinal (GI) bleeding, Crohn disease, Celiac disease, small bower tumors, and other disorders that occur in the GI tract have always been challenging to be diagnosed and treated due to the inevitable difficulty in accessing such a complex environment within the human body. With the invention of wireless capsule endoscope, the next generation of the traditional cabled endoscope, not only a dream has come true for the patients who have experienced a great discomfort and unpleasantness caused by the conventional endoscopic method, but also a new research field has been opened to develop a complete miniature robotic device that …
Abnormal Magnetic Behaviors And Large Magnetocaloric Effect In Mnps3 Nanoparticles, R Zeng, S Q. Wang, G D. Du, Jianli Wang, J C. Debnath, Precious Shamba, Z Y. Fang, S. X. Dou
Abnormal Magnetic Behaviors And Large Magnetocaloric Effect In Mnps3 Nanoparticles, R Zeng, S Q. Wang, G D. Du, Jianli Wang, J C. Debnath, Precious Shamba, Z Y. Fang, S. X. Dou
Faculty of Engineering - Papers (Archive)
A nanostructured honeycomb lattice consisting of MnPS3 nanoparticles synthesized via the ion-exchange technique was found to have restacked molecular layers stabilized by H2O insertion between the layers. Susceptibility (χ) and heat capacity measurements showed the absence of long range magnetic ordering, at least down to 2 K. However, the χ data showed that the system possesses a high effective Curie temperature, suggesting that the system is in a high spin lattice disordered state. Evaluation of the magnetocaloric effect indicates that the system has a large reversible magnetic-entropy change (−ΔSm) of 6.8 and 12.8 J/kg K …
Investigation On Temperature Change Of Cold Magnesium Alloy Strips Rolling Process With Heated Roll, Hailiang Yu, Qing-Bo Yu, Jin-Wu Kang, Xiang-Hua Liu
Investigation On Temperature Change Of Cold Magnesium Alloy Strips Rolling Process With Heated Roll, Hailiang Yu, Qing-Bo Yu, Jin-Wu Kang, Xiang-Hua Liu
Faculty of Engineering - Papers (Archive)
Magnesium alloy strips are widely used in aerospace, automotive industry, etc., which are difficult to produce through cold forming process due to their poor deformation ability. In this article, we studied whether the rolling process with heated roll could be used to roll cold magnesium alloy strips. Thermal-mechanical finite element simulation of the rolling process, using heated roll and cold strips to produce the magnesium alloy strips, was carried out. Influences of roll temperature, rolling velocity, rolling reduction ratio, and initial strip thickness on the thermal field and the mean temperature of magnesium alloy strips were analyzed. Both the heated …
Improving Thermal Comfort In Naturally Ventilated University Buildings, Laia Ledo, Zhenjun Ma, Paul Cooper
Improving Thermal Comfort In Naturally Ventilated University Buildings, Laia Ledo, Zhenjun Ma, Paul Cooper
Faculty of Engineering - Papers (Archive)
A substantial fraction of Australian university buildings are naturally ventilated. These buildings consume a significant amount of energy and frequently suffer from overheating problems, resulting in poor indoor thermal comfort. This paper presents an investigation on the effectiveness of a range of energy conservation measures (ECMs) that can potentially be used to enhance energy performance and thermal comfort of these buildings. The ECMs considered in this study include information technology (IT) equipment and lighting upgrades, and measures focussed on occupant behaviour change. The effectiveness of each ECM was evaluated through modelling of a case study building at the University of …
Liquefaction And Failure Mechanisms Of Sandy Sloped Ground During Earthquakes: A Comparison Between Laboratory And Field Observations, Gabriele Chiaro, Junichi Koseki
Liquefaction And Failure Mechanisms Of Sandy Sloped Ground During Earthquakes: A Comparison Between Laboratory And Field Observations, Gabriele Chiaro, Junichi Koseki
Faculty of Engineering - Papers (Archive)
Prediction of ground failure involving earthquake-induced liquefaction of sloped sandy deposits is a major challenge in geomechanics due to the great number of factors that need to be considered such as initial static shear stress, cyclic shear stress, density state, confining pressure, loading conditions etc. This paper briefly describes the triggers (stress conditions) and the consequences (deformation behaviour) for three distinct failure modes that can be produced by an earthquake on sloped ground consisting of loose saturated sand. Such failure mechanisms were observed in the laboratory by performing undrained monotonic and cyclic torsional simple shear tests on Toyoura sand specimens. …