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Earthquake Engineering For Transportation Network In Low To Moderate Seismicity Regions, M Neaz Sheikh, Frederic Legeron, Hing Ho Tsang, Nelson Lam, Timothy J. Mccarthy
Earthquake Engineering For Transportation Network In Low To Moderate Seismicity Regions, M Neaz Sheikh, Frederic Legeron, Hing Ho Tsang, Nelson Lam, Timothy J. Mccarthy
Faculty of Engineering - Papers (Archive)
Major seismic events during the past few decades have continued to demonstrate the destructive power of earthquakes, with failures to buildings, bridges, industrial and port facilities, as well as giving rise to great economic losses. However, in low to moderate seismicity regions, seismic resistant design is still considered complicated and expensive in terms of actual seismic risk. This is partly due to the fact that design codes do not have any special consideration for these regions; also, economic factors have not been integrated fully with the design principles. Bridges are the most critical components of the transportation network, as failure …
Gate-Tunable Ruderman-Kittel-Kasuya-Yosida Interaction Mediated By Low-Dimensional Electrons With Rashba Spin-Orbit Coupling, Pin Lyu, Ning-Ning Liu, Chao Zhang
Gate-Tunable Ruderman-Kittel-Kasuya-Yosida Interaction Mediated By Low-Dimensional Electrons With Rashba Spin-Orbit Coupling, Pin Lyu, Ning-Ning Liu, Chao Zhang
Faculty of Engineering - Papers (Archive)
The gate-controllable Ruderman-Kittel-Kasuya-Yosida RKKY magnetic interaction between themagnetic impurities embedded in one- and two-dimensional electron gas in the presence of Rashbaspin-orbit coupling was analyzed theoretically. By using the eigenfunctions of the single-particleRashba Hamiltonian as the basis of second quantization, we derived the RKKY interaction by fullytaking into account the spin-orbit interaction. The dependence of the RKKY magnetic interaction onthe Rashba spin-orbit coupling strength was obtained numerically. Our results clearly indicate thatthe RKKY interaction can be significantly modified by an applied voltage via the Rashba spin-orbitcoupling.
Amorphous Carbon-Coated Silicon Nanocomposites: A Low-Temperature Synthesis Via Spray Pyrolysis And Their Application As High-Capacity Anodes For Lithium-Ion Batteries, See How Ng, Jiazhao Wang, David Wexler, Sau Yen Chew, Hua-Kun Liu
Amorphous Carbon-Coated Silicon Nanocomposites: A Low-Temperature Synthesis Via Spray Pyrolysis And Their Application As High-Capacity Anodes For Lithium-Ion Batteries, See How Ng, Jiazhao Wang, David Wexler, Sau Yen Chew, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
This article introduces an effective, inexpensive, and industrially oriented approach to produce carbon-coated Si nanocomposites as high-capacity anode materials for use in rechargeable lithium-ion batteries. Initially, nanosized Si particles (nm) were mixed in a citric acid/ethanol solution via ultrasonication. This mixture was further spray-pyrolyzed in air at low processing temperature (300-500 C), resulting in a homogeneous layer of carbon coating on the surface of the spheroidal Si nanoparticles. The effects of the processing temperature on the amorphous carbon content, the thickness of the carbon-coating layer, and the homogeneity of the carbon coating were studied in detail. These parameters strongly influenced …
Texture Evolution During Annealing Of Warm Rolled Cr-Containing Low Carbon Steels, E V. Pereloma, Azdiar A. Gazder, John J. Jonas, Chris H. J. Davies
Texture Evolution During Annealing Of Warm Rolled Cr-Containing Low Carbon Steels, E V. Pereloma, Azdiar A. Gazder, John J. Jonas, Chris H. J. Davies
Faculty of Engineering - Papers (Archive)
Two low carbon steels alloyed with 0.48wt% and 0.78wt% Cr were warm rolled to 65% reduction at 640°C. Annealing was carried out at 710°C to achieve a range of recrystallized volume fractions up to 100%. Texture analysis was performed by X-ray diffraction and Electron Back Scattering Diffraction. During the initial stages of recrystallization, more recrystallized grains nucleated at shear bands than at grain boundaries in the 0.48wt%Cr steel, whereas this was not the case in the 0.78wt%Cr steel. This is associated with a decrease in the propensity to form shear bands due to the lower amount of C in solid …
Low-Temperature Synthesis Of Polypyrrole-Coated Liv3o8 Composite With Enhanced Electrochemical Properties, Sau Yen Chew, Chuanqi Feng, See How Ng, Jiazhao Wang, Zaiping Guo, Hua-Kun Liu
Low-Temperature Synthesis Of Polypyrrole-Coated Liv3o8 Composite With Enhanced Electrochemical Properties, Sau Yen Chew, Chuanqi Feng, See How Ng, Jiazhao Wang, Zaiping Guo, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
A composite, LiV3O8 -polypyrrole (PPy), was synthesized by a low-temperature solution route followed by an in situ polymerization method. The as-prepared powders consisted of nanosized PPy distributed homogeneously within the layered lithium trivanadate. The electrochemical properties of LiV3O8–PPy composite were systematically investigated and compared with bare lithium trivanadate. It was found that the electrochemical performance of the LiV3O8–PPy composite was significantly enhanced, with a specific capacity of ∼183mAhg−1 retained after 100cycles . This suggests that nanostructured PPy could work well as a polymer-conducting matrix and also as a binding material to improve the overall electrochemical properties of the LiV3O8 when …