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Protecting Low-To-Medium-Rise Buildings By Scrap Tyre-Soil Mixtures, Hing Ho Tsang, Nelson Lam, Saman Yaghmaei-Sabegh, M Neaz Sheikh, Wei Xiong, Shou-Ping Shang
Protecting Low-To-Medium-Rise Buildings By Scrap Tyre-Soil Mixtures, Hing Ho Tsang, Nelson Lam, Saman Yaghmaei-Sabegh, M Neaz Sheikh, Wei Xiong, Shou-Ping Shang
Faculty of Engineering - Papers (Archive)
The stockpiling of scrap tyres is a significant threat to our environment and has been a hot topic amongst the engineering community which has been looking for long term viable solutions to the recycling and reuse of rubber. This paper proposes a new method of utilizing scrap tyres for applications in infrastructure protection forming part of the solution strategy. The method involves mixing scrap tyres with soil materials and placing the mixtures around building foundations, for vibration absorption. The potential of the proposed method will be demonstrated by numerical modelling to show its effectiveness and robustness as a means of …
Response Of Rigid Polyurethane Foam-Filled Steel Hollow Columns Under Low Velocity Impact, Alexander Remennikov, Brian Uy, Kong Sih Ying
Response Of Rigid Polyurethane Foam-Filled Steel Hollow Columns Under Low Velocity Impact, Alexander Remennikov, Brian Uy, Kong Sih Ying
Faculty of Engineering - Papers (Archive)
This paper presents the results of experimental investigations on rigid polyurethane foam-filled steel hollow columns under dynamic loading conditions.
A Low-Complexity Iterative Channel Estimation And Detection Technique For Doubly Selective Channels, Qinghua Guo, Li Ping, Defeng (David) Huang
A Low-Complexity Iterative Channel Estimation And Detection Technique For Doubly Selective Channels, Qinghua Guo, Li Ping, Defeng (David) Huang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we propose a low-complexity iterative joint channel estimation, detection and decoding technique for doubly selective channels. The key to the proposed technique is a segment-by-segment processing strategy under the assumption that the channel is approximately static within a short segment of a data block. Through a virtual zero-padding technique, the proposed segment-by-segment equalization approach inherits the low-complexity advantage of the conventional frequency domain equalization (FDE), but does not need the assistance of guard interval (for cyclic-prefixing or zero-padding), thereby avoiding the spectral and power overheads. Furthermore, we develop a low-complexity bidirectional channel estimator, where the Gaussian message …
Ybco Film With Sm Addition Using Low-Fluorine Tfa-Mod Approach, Dongqi Shi, Lin Wang, Jung Ho Kim, Xuebin Zhu, Min Liu, Qi Li, Rong Zeng, Jyhuan Ahn, S. X. Dou, J. Y. Yoo, Y. K. Kim, T. Yamashita, John Barry, Richard Taylor
Ybco Film With Sm Addition Using Low-Fluorine Tfa-Mod Approach, Dongqi Shi, Lin Wang, Jung Ho Kim, Xuebin Zhu, Min Liu, Qi Li, Rong Zeng, Jyhuan Ahn, S. X. Dou, J. Y. Yoo, Y. K. Kim, T. Yamashita, John Barry, Richard Taylor
Faculty of Engineering - Papers (Archive)
Yttrium barium copper oxide (YBCO) film was synthesized by a metal-organic deposition (MOD) process with fluorine-free Y and Cu precursor. The precursor solution with Sm addition enabled further improvement of the thickness and uniformity of precursor films. The calcination and firing processes were studied, and the precursor film was successfully converted to dense and uniform YBCO film on LaAlO3 (LAO) substrate after annealing in a wet Ar and O2 atmosphere. The measured critical current density (J c) value was about 80 A/cm-w (2.66 MA/cm2). The trifluoroacetate (TFA) reduced MOD process has the advantage that …
Low Temperature Graphene Growth, Shailesh Kumar, N Mcevoy, T. Lutz, G. Keeley, Nicholas Whiteside, Werner Blau, G. Duesberg
Low Temperature Graphene Growth, Shailesh Kumar, N Mcevoy, T. Lutz, G. Keeley, Nicholas Whiteside, Werner Blau, G. Duesberg
Faculty of Engineering and Information Sciences - Papers: Part A
We demonstrate the growth of graphene films on nickel substrates by chemical vapour deposition using acetylene at temperatures as low as 750 degrees celsius, opening a viable route for its scalable production. Raman spectroscopy was used to confirm defect-free mono and multilayer graphene at and above this temperature, and of defective graphene at lower temperatures. Atomic force microscopy and scanning electron microscopy performed directly on the films give an indication of graphene flake size, morphology and also the topography on substrate. An unexpected dependence of graphene thickness on precursor dwell time is reported. This together with low temperature growth suggests …
Low-Complexity Ldpc Coded Bicm-Id With Orthogonal Modulations, S Che, S Tong
Low-Complexity Ldpc Coded Bicm-Id With Orthogonal Modulations, S Che, S Tong
Faculty of Engineering and Information Sciences - Papers: Part A
A low-complexity low density parity check (LDPC) coded bit-interleaved coded modulation with iterative decoding (BICM-ID) scheme with orthogonal modulations is proposed. With a novel mapping strategy of coded bits to symbols, the proposed scheme is equivalent to a generalised LDPC code with Hadamard constraints and thus orthogonal demodulation can be merged into the iterative LDPC decoding process, resulting in a simpler implementation and a lower computational complexity.
Superconducting Properties Of Mgb2 Wire Using Ball Milled Low Purity Boron, Xun Xu, Jung Ho Kim, Yun Zhang, Yue Zhao, Matthew Rindfleisch, Michael Tomsic
Superconducting Properties Of Mgb2 Wire Using Ball Milled Low Purity Boron, Xun Xu, Jung Ho Kim, Yun Zhang, Yue Zhao, Matthew Rindfleisch, Michael Tomsic
Faculty of Engineering - Papers (Archive)
MgB2/Fe wire samples were prepared by using ball-milled 96% boron (B) powder with strong semi-crystalline phase. We observed samples that contained ball-milled 96% B in comparison with one made from as-supplied commercial 96% B, with the results showing a significant enhancement in the high field transport critical current density (Jct) due to small grain size and better reactivity. However, the inter-grain connectivity became worse, which could lead to poor Jct in low field and an increased level of disorder.