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Full-Text Articles in Engineering

Performance Simulation And Evaluation Of Net Zero Energy Buildings In An Australian Coastal Climate, Joel Anderson, Duane A. Robinson, Zhenjun Ma Jan 2019

Performance Simulation And Evaluation Of Net Zero Energy Buildings In An Australian Coastal Climate, Joel Anderson, Duane A. Robinson, Zhenjun Ma

Faculty of Engineering and Information Sciences - Papers: Part B

Net zero energy buildings (NZEB) are becoming more common, and as new energy saving designs and technologies become available, the ability to estimate overall energy use and understand the impact on operation of building appliances will become important. This paper outlines simulation results of performance improvements achieved by modifying various components (glazing, lighting, thermal comfort settings) of two tertiary education NZEBs and a typical modern commercial building. The DesignBuilder models' thermal performance and energy consumption were validated using real data from case study buildings. The work shows validating models of smaller, less conven-tional, buildings is more difficult than for larger ...


Use Of Geogrids And Recycled Rubber In Railroad Infrastructure For Enhanced Performance, Buddhima Indraratna, Yujie Qi, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Tim Neville, Fernanda Bessa Ferreira, Amir Shahkolahi Jan 2019

Use Of Geogrids And Recycled Rubber In Railroad Infrastructure For Enhanced Performance, Buddhima Indraratna, Yujie Qi, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Tim Neville, Fernanda Bessa Ferreira, Amir Shahkolahi

Faculty of Engineering and Information Sciences - Papers: Part B

Railway tracks are conventionally built on compacted ballast and structural fill layers placed above the natural (subgrade) foundation. However, during train operations, track deteriorations occur progressively due to ballast degradation. The associated track deformation is usually accompanied by a reduction in both load bearing capacity and drainage, apart from imposing frequent track maintenance. Suitable ground improvement techniques involving plastic inclusions (e.g., geogrids) and energy absorbing materials (e.g., rubber products) to enhance the stability and longevity of tracks have become increasingly popular. This paper presents the outcomes from innovative research and development measures into the use of plastic and ...


On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma Jan 2019

On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

This article addresses the pseudo-tetragonal nature of the crystal lattice of martensite in carbon-containing steels. It is proposed that the periodic distortion of c-cube edges by the presence of carbon atoms is better reflected in the root-mean-square distortions of martensite lattice than by the value of doublet splitting of the corresponding X-ray reflections of the martensite crystal.


Implementation Of An Iot Based Radar Sensor Network For Wastewater Management, Adam Drenoyanis, Raad Raad, Ivan Wady, Carmel Krogh Jan 2019

Implementation Of An Iot Based Radar Sensor Network For Wastewater Management, Adam Drenoyanis, Raad Raad, Ivan Wady, Carmel Krogh

Faculty of Engineering and Information Sciences - Papers: Part B

Critical wastewater events such as sewer main blockages or overflows are often not detected until after the fact. These events can be costly, from both an environmental impact and monetary standpoint. A standalone, portable radar device allowing non-invasive benchmarking of sewer pumping station (SPS) pumps is presented. Further, by configuring and deploying a complete Low Power Wide Area Network (LPWAN), Shoalhaven Water (SW) now has the opportunity to create "Internet of Things" (IoT)-capable devices that offer freedom from the reliance on mobile network providers, whilst avoiding congestion on the existing Supervisory Control and Data Acquisition (SCADA) telemetry backbone. This ...


Non-Linear Tyre Model-Based Non-Singular Terminal Sliding Mode Observer For Vehicle Velocity And Side-Slip Angle Estimation, Boyuan Li, Haiping Du, Weihua Li, Bangji Zhang Jan 2019

Non-Linear Tyre Model-Based Non-Singular Terminal Sliding Mode Observer For Vehicle Velocity And Side-Slip Angle Estimation, Boyuan Li, Haiping Du, Weihua Li, Bangji Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

Vehicle velocity and side-slip angle are important vehicle states for the electronic stability programme and traction control system in vehicle safety control system and for the control allocation method of electric vehicles with in-wheel motors. This paper proposes an innovative side-slip angle estimator based on the non-linear Dugoff tyre model and non-singular terminal sliding mode observer. The proposed estimation method based on the non-linear tyre model can accurately present the tyre's non-linear characteristics and can show advantages over estimation methods based on the linear tyre model. The utilised Dugoff tyre model has a relatively simple structure with few parameters ...


Derivative-Based Acceleration Of General Vector Machine, Binbin Yong, Fucun Li, Qingquan Lv, Jun Shen, Qingguo Zhou Jan 2019

Derivative-Based Acceleration Of General Vector Machine, Binbin Yong, Fucun Li, Qingquan Lv, Jun Shen, Qingguo Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

General vector machine (GVM) is one of supervised learning machine, which is based on three-layer neural network. It is capable of constructing a learning model with limited amount of data. Generally, it employs Monte Carlo algorithm (MC) to adjust weights of the underlying network. However, GVM is time-consuming at training and is not efficient when compared with other learning algorithm based on gradient descent learning. In this paper, we present a derivative-based Monte Carlo algorithm (DMC) to accelerate the training of GVM. Our experimental results indicate that DMC algorithm is faster than the original MC method. Specifically, the training time ...


Analytical Expressions For Characterising Voltage Dips And Phase-Angle Jumps In Electricity Networks, Most Begum, Mollah R. Alam, Kashem M. Muttaqi Jan 2019

Analytical Expressions For Characterising Voltage Dips And Phase-Angle Jumps In Electricity Networks, Most Begum, Mollah R. Alam, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part B

Voltage dips/sags are one of the major concerns for electricity consumers as well as utility service providers. Therefore, the characterisation of voltage dips/sags is required. This study presents a set of mathematical expressions for characterising different types of voltage dips/sags and their associated phase-angle jumps, which are typically found due to faults and/or disturbances in electricity networks. The expressions are derived analytically from the model of the power network containing generators, transmission and/or distribution lines, transformers etc. Four types of voltage dips, namely, A, B, E, and G, which are associated with four major types ...


Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang Jan 2019

Manganese Based Layered Oxides With Modulated Electronic And Thermodynamic Properties For Sodium Ion Batteries, Kai Zhang, Duho Kim, Zhe Hu, Mihui Park, Gahee Noh, Yujeong Yang, Jing Zhang, Vincent Lau, Shulei Chou, Maenghyo Cho, Si-Young Choi, Yong-Mook Kang

Australian Institute for Innovative Materials - Papers

Manganese based layered oxides have received increasing attention as cathode materials for sodium ion batteries due to their high theoretical capacities and good sodium ion conductivities. However, the Jahn–Teller distortion arising from the manganese (III) centers destabilizes the host structure and deteriorates the cycling life. Herein, we report that zinc-doped Na0.833[Li0.25Mn0.75]O2 can not only suppress the Jahn–Teller effect but also reduce the inherent phase separations. The reduction of manganese (III) amount in the zinc-doped sample, as predicted by first-principles calculations, has been confirmed by its high binding energies ...


A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang Jan 2019

A Freestanding Cnts Film Fabricated By Pyrrole-Modified Cvd For Capacitive Deionization, Dan Song, Wenlei Guo, Tao Zhang, Pengyi Lu, Anran Guo, Feng Hou, Xiao Yan, Ji Liang

Australian Institute for Innovative Materials - Papers

Carbon nanotubes (CNTs) are an excellent electrode material for capacitive deionization (CDI), due to their excellent electronic conductivity and outstanding chemical/physical stability. Their powder form and easy aggregation, however, have greatly limited their practical CDI performance. Aiming to address this issue, the authors report a freestanding CNT film which was fabricated by floating-catalyst chemical vapor deposition, as a binder-free electrode for CDI. By simply adjusting the pyrrole content in the precursor, the morphology of the resulting CNT film can be tuned to meet the requirements of CDI. In the presence of 2 wt.% pyrrole, the CNT film with a ...


Mobile Health Interventions For Self-Control Of Unhealthy Alcohol Use: Systematic Review, Ting Song, Siyu Qian, Ping Yu Jan 2019

Mobile Health Interventions For Self-Control Of Unhealthy Alcohol Use: Systematic Review, Ting Song, Siyu Qian, Ping Yu

Faculty of Engineering and Information Sciences - Papers: Part B

Background: Unhealthy alcohol use (UAU) is one of the major causes of preventable morbidity, mortality, and associated behavioral risks worldwide. Although mobile health (mHealth) interventions can provide consumers with an effective means for self-control of UAU in a timely, ubiquitous, and cost-effective manner, to date, there is a lack of understanding about different health outcomes brought by such interventions. The core components of these interventions are also unclear.

Objective: This study aimed to systematically review and synthesize the research evidence about the efficacy of mHealth interventions on various health outcomes for consumer self-control of UAU and to identify the core ...


A New Method For Direct Tensile Testing Of Concrete, Faez Alhussainy, Hayder Alaa Hasan, M Neaz Sheikh, Muhammad N. S Hadi Jan 2019

A New Method For Direct Tensile Testing Of Concrete, Faez Alhussainy, Hayder Alaa Hasan, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Different testing methods were used in previous studies to measure the direct tensile strength of concrete. However, these methods experienced several major deficiencies such as stress concentration at the end of the specimens because of inadequate gripping and loading eccentricity and nonuniform fracture plane because of difficulties in aligning and centering the specimens during testing. This study presents the details of a new method of testing concrete under uniaxial tension. The method was developed to overcome the difficulties associated with testing methods adopted in the previous research studies. A full description of the wooden molds used in casting the specimens ...


A Robust Registration Method For Autonomous Driving Pose Estimation In Urban Dynamic Environment Using Lidar, Rendong Wang, Youchun Xu, Miguel Sotelo, Yulin Ma, T Sarkodie-Gyan, Zhixiong Li, Weihua Li Jan 2019

A Robust Registration Method For Autonomous Driving Pose Estimation In Urban Dynamic Environment Using Lidar, Rendong Wang, Youchun Xu, Miguel Sotelo, Yulin Ma, T Sarkodie-Gyan, Zhixiong Li, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

The registration of point clouds in urban environments faces problems such as dynamic vehicles and pedestrians, changeable road environments, and GPS inaccuracies. The state-of-the-art methodologies have usually combined the dynamic object tracking and/or static feature extraction data into a point cloud towards the solution of these problems. However, there is the occurrence of minor initial position errors due to these methodologies. In this paper, the authors propose a fast and robust registration method that exhibits no need for the detection of any dynamic and/or static objects. This proposed methodology may be able to adapt to higher initial errors ...


Robust Entangled-Photon Ghost Imaging With Compressive Sensing, Jun Li, Wenyu Gao, Jiachuan Qian, Qinghua Guo, Jiangtao Xi, Christian H. Ritz Jan 2019

Robust Entangled-Photon Ghost Imaging With Compressive Sensing, Jun Li, Wenyu Gao, Jiachuan Qian, Qinghua Guo, Jiangtao Xi, Christian H. Ritz

Faculty of Engineering and Information Sciences - Papers: Part B

This work experimentally demonstrates that the imaging quality of quantum ghost imaging (GI) with entangled photons can be significantly improved by properly handling the errors caused by the imperfection of optical devices. We also consider compressive GI to reduce the number of measurements and thereby the data acquisition time. The image reconstruction is formulated as a sparse total least square problem which is solved with an iterative algorithm. Our experiments show that, compared with existing methods, the new method can achieve a significant performance gain in terms of mean square error and peak signal⁻noise ratio.


Grain Boundary Induced Deformation Mechanisms In Nanocrystalline Al By Molecular Dynamics Simulation: From Interatomic Potential Perspective, Liang Zhang, Yasushi Shibuta, Xiaoxu Huang, Cheng Lu, Mao Liu Jan 2019

Grain Boundary Induced Deformation Mechanisms In Nanocrystalline Al By Molecular Dynamics Simulation: From Interatomic Potential Perspective, Liang Zhang, Yasushi Shibuta, Xiaoxu Huang, Cheng Lu, Mao Liu

Faculty of Engineering and Information Sciences - Papers: Part B

Nanocrystalline metals exhibit many excellent mechanical properties and their underlying deformation mechanisms have been studying widespread. The well-designed atomistic simulations can predict the mechanical behavior of materials ahead of experiments and provide sufficient information on the atomic scale. The choice of appropriate interatomic potential is one of the main concerns of any atomistic simulation that needs to be seriously considered in order to obtain reliable results. In this study, we investigated the mechanical response and the deformation mechanisms of nanocrystalline Al under uniaxial loading by molecular dynamics (MD) simulations with different embedded atom method (EAM) interatomic potentials. The selection of ...


A Practical Protocol For The Experimental Design Of Comparative Studies On Water Treatment, Long Ho, Olivier Thas, Wout Van Echelpoel, Peter L. M Goethals Jan 2019

A Practical Protocol For The Experimental Design Of Comparative Studies On Water Treatment, Long Ho, Olivier Thas, Wout Van Echelpoel, Peter L. M Goethals

Faculty of Engineering and Information Sciences - Papers: Part B

The design and execution of effective and informative experiments in comparative studies on water treatment is challenging due to their complexity and multidisciplinarity. Often, environmental engineers and researchers carefully set up their experiments based on literature information, available equipment and time, analytical methods and experimental operations. However, because of time constraints but mainly missing insight, they overlook the value of preliminary experiments, as well as statistical and modeling techniques in experimental design. In this paper, the crucial roles of these overlooked techniques are highlighted in a practical protocol with a focus on comparative studies on water treatment optimization. By integrating ...


Accurate Magneto-Optical Determination Of Radius Of Topological Nodal-Ring Semimetals, Wenye Duan, Cuihong Yang, Zhongshui Ma, Yiming Zhu, C Zhang Jan 2019

Accurate Magneto-Optical Determination Of Radius Of Topological Nodal-Ring Semimetals, Wenye Duan, Cuihong Yang, Zhongshui Ma, Yiming Zhu, C Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

The shape of the Fermi surface of topological nodal-ring semimetals at low carrier concentrations is characterized by the ring radius b/ℏvF. This peculiar topological property may not have a clear signature in measurable physical quantities. We demonstrate an accurate and definitive method to determine the radius of topological nodal-ring semimetals. Under a magnetic field along the ring axis, the axial magneto-optical response (σzz) has a giant peak. The position of this ultrastrong response is at the frequency of exactly 2b and is independent of the strength of the magnetic field. The amplitude of the peak response is many times ...


In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu Mar 2018

In Operando Mechanism Analysis On Nanocrystalline Silicon Anode Material For Reversible And Ultrafast Sodium Storage, Lei Zhang, Xianluo Hu, Chaoji Chen, Haipeng Guo, Xiaoxiao Liu, Gengzhao Xu, Haijian Zhong, Shuang Cheng, Peng Wu, Jiashen Meng, Yunhui Huang, Shi Xue Dou, Hua-Kun Liu

Australian Institute for Innovative Materials - Papers

Presently, lithium-ion batteries (LIBs) are the most promising commercialized electrochemical energy storage systems. Unfortunately, the limited resource of Li results in increasing cost for its scalable application and a general consciousness of the need to find new type of energy storage technologies. Very recently, substantial effort has been invested to sodium-ion batteries (SIBs) due to their effectively unlimited nature of sodium resources. Furthermore, the potential of Li/Li+ is 0.3 V lower than that of Na/Na+, which makes it more effective to limit the electrolyte degradation on the outer surface of the electrode.[1] Nevertheless, one major obstacle ...


Resilience And Sustainability In The Management Of Landslides, Phillip N. Flentje, Robin N. Chowdhury Jan 2018

Resilience And Sustainability In The Management Of Landslides, Phillip N. Flentje, Robin N. Chowdhury

Faculty of Engineering and Information Sciences - Papers: Part A

There are many regions worldwide which are susceptible to landslides, which cause loss of life and adverse impacts to infrastructure, environment and communities. Landslides are often triggered by exceptional rainfall and large-magnitude earthquakes. A range of strategies and methods have been developed to mitigate the occurrence of landslides and to reduce their impact, including risk to human safety. The adopted approaches and systems must be sustainable and resilient in relation to the communities that are at risk. This paper refers to an Australian regional case study of urban landslide management in the Wollongong region, New South Wales. The research carried ...


The Murray Darling Basin Plan Is Not Delivering - There's No More Time To Waste, Quentin Grafton, Darla Hatton Macdonald, David Paton, Graham P. Harris, Henning Bjornlund, Jeffery D. Connor, John Quiggin, John Williams, Lin Crase, Richard T. Kingsford, Sarah Ann Wheeler Jan 2018

The Murray Darling Basin Plan Is Not Delivering - There's No More Time To Waste, Quentin Grafton, Darla Hatton Macdonald, David Paton, Graham P. Harris, Henning Bjornlund, Jeffery D. Connor, John Quiggin, John Williams, Lin Crase, Richard T. Kingsford, Sarah Ann Wheeler

SMART Infrastructure Facility - Papers

More than five years after the Murray Darling Basin Plan was implemented, it's clear that it is not delivering on its key objectives. The Basin Plan, at its core, is about reducing the amount of water that can be extracted from its streams, rivers and aquifers. It includes an environmental water strategy to improve the conditions of the wetlands and rivers of the basin. The Productivity Commission will conduct a five-yearly inquiry into the effectiveness of the Basin Plan in 2018. It is high time to explain what is really going on in the Basin and water recovery. For ...


The Charge Transport Mechanisms In Conducting Polymer Polypyrrole Films And Fibers, Reza Ghanbari, Shaban Reza Ghorbani, Hadi Arabi, Javad Foroughi Jan 2018

The Charge Transport Mechanisms In Conducting Polymer Polypyrrole Films And Fibers, Reza Ghanbari, Shaban Reza Ghorbani, Hadi Arabi, Javad Foroughi

Australian Institute for Innovative Materials - Papers

Smart materials based on inherently conducting polymers are of practical interest and extend the advantages of electromaterials from the nanoscale to macroscale applications. However understanding mechanisms of the their electrical properties are still remained challanging. Herein, we report the transport properties of chemically and electrochemically preapred conducting polymer polypyrrole films and fibers. Conduction mechanisms of the as-prepared polypyrrole (PPy) were investigated using their electrical properties as a function of temperature (7-300 K). The results of the PPy resistivity were evaluated using a linear combination of Mott's and Efros-Shklovskii's Variable- Range Hopping (Mott-VRH and ES-VRH) models. It was found ...


Enhancement Of Thermoelectric Figure Of Merit By The Insertion Of Multi-Walled Carbon Nanotubes In Α-Mgagsb, Jingdan Lei, De Zhang, Weibao Guan, Zheng Ma, Zhenxiang Cheng, Chao Wang, Yuanxu Wang Jan 2018

Enhancement Of Thermoelectric Figure Of Merit By The Insertion Of Multi-Walled Carbon Nanotubes In Α-Mgagsb, Jingdan Lei, De Zhang, Weibao Guan, Zheng Ma, Zhenxiang Cheng, Chao Wang, Yuanxu Wang

Australian Institute for Innovative Materials - Papers

Hybrid materials provide an efficient alternative route on improving the thermoelectric performance compared with doping elements. Especially, the insertion of carbon nanotubes plays an effective role in modulating the electrical transport properties and phonon scattering simultaneously. We fabricated a multi-walled carbon nanotube (MWCNTs) doped α-MgAgSb-based hybrid material and researched its thermoelectric properties in detail. The introduced MWCNTs enhanced carrier transport due to the metallic character of MWCNTs and phonon dispersion by the additional interfaces of insertions. The results showed that the electrical conductivity in α-MgAgSb/CNTs was remarkably enhanced especially at MgAg0.97Sb0.99/0.15 wt. % CNTs boosting to ...


Energy Of Dendritic Avalanches In Thin-Film Superconductors, T Qureishy, J I. Vestgarden, A J. Qviller, A S. Fjellvag, J M. Meckbach, A Torgovkin, Tom H. Johansen, K Ilin, M Siegel, I J. Maasilta, Pavlo Mikheenko Jan 2018

Energy Of Dendritic Avalanches In Thin-Film Superconductors, T Qureishy, J I. Vestgarden, A J. Qviller, A S. Fjellvag, J M. Meckbach, A Torgovkin, Tom H. Johansen, K Ilin, M Siegel, I J. Maasilta, Pavlo Mikheenko

Australian Institute for Innovative Materials - Papers

A method for calculating stored magnetic energy in a thin superconducting film based on quantitative magneto-optical imaging is developed. Energy and magnetic moment are determined with these calculations for full hysteresis loops in a thin film of the superconductor NbN. Huge losses in energy are observed when dendritic avalanches occur. Magnetic energy, magnetic moment, sheet current and magnetic flux distributions, all extracted from the same calibrated magneto-optical images, are analyzed and discussed. Dissipated energy and the loss in moment when dendritic avalanches occur are related to each other. Calculating these losses for specific spatially-resolved flux avalanches is a great advantage ...


Progress And Future Perspectives On Li(Na)-Co2 Batteries, Fengshi Cai, Zhe Hu, Shulei Chou Jan 2018

Progress And Future Perspectives On Li(Na)-Co2 Batteries, Fengshi Cai, Zhe Hu, Shulei Chou

Australian Institute for Innovative Materials - Papers

Li(Na)-CO2 batteries are attracting significant research attention due to contemporary energy and environmental issues. Li(Na)-CO2 batteries make possible the utilization of CO2 and open up a new avenue for energy conver-sion and storage. Research on this system is currently in its infancy, and its development is still faced with many challenges in terms of high charge potential, weak rate capability, and poor cyclability. Moreover, the reaction mechanism in the battery is still unclear and hard to determine, due to the generation of carbon along with metal carbonates on the cathode. In this review, the authors present ...


Review Of Electrolytes In Nonaqueous Lithium-Oxygen Batteries, Haipeng Guo, Wenbin Luo, Jun Chen, Shulei Chou, Hua-Kun Liu, Jiazhao Wang Jan 2018

Review Of Electrolytes In Nonaqueous Lithium-Oxygen Batteries, Haipeng Guo, Wenbin Luo, Jun Chen, Shulei Chou, Hua-Kun Liu, Jiazhao Wang

Australian Institute for Innovative Materials - Papers

Based on an inexhaustible and ubiquitous source of oxygen, the lithium-oxygen batteries are currently the subject of much scientific investigation because of their potential for extremely high energy density. The electrocatalytic materials for them have been extensively researched during the past decade. Even though they are a key component in the lithium-oxygen batteries, however, the study of electrolytes is still in its primary stage. Electrolytes have an important influence on the electrochemical performance of lithium-oxygen batteries, especially on their cycling stability and rate capacity. Therefore, it is important to select an ideal electrolyte with excellent stability against attack by reaction ...


Synthesis And Characterization Of Dendritic Pt Nanoparticles By Using Cationic Surfactant, Kenya Kani, Mohamed B. Zakaria, Jianjian Lin, Abdulmohsen Alshehri, Jeonghun Kim, Yoshio Bando, Jungmok You, Md. Shahriar Al Hossain, Jiang Bo, Yusuke Yamauchi Jan 2018

Synthesis And Characterization Of Dendritic Pt Nanoparticles By Using Cationic Surfactant, Kenya Kani, Mohamed B. Zakaria, Jianjian Lin, Abdulmohsen Alshehri, Jeonghun Kim, Yoshio Bando, Jungmok You, Md. Shahriar Al Hossain, Jiang Bo, Yusuke Yamauchi

Australian Institute for Innovative Materials - Papers

Platinum (Pt) is known as one of the most promising electrocatalysts, and nanostructured Pt materials have enhanced its activity due to their abundant catalytically active sites derived from their high surface area. Herein, we synthesize fascinating dendritic Pt nanoparticles (DPNs) by a softtemplating method using hexadecyltrimethylammonium chloride (CTAC) as a pore-forming agent. The dissolved negatively charged Pt precursor (PtCl4 2¹) effectively interact with the surfactant. The particle size of the obtained DPNs is around 20 nm, and the pore walls are composed of Pt nanocrystals. The obtained DPNs show good electrocatalytic activity towards methanol oxidation reaction (MOR) compared to commercial ...


3d Printing Vegemite And Marmite: Redefining "Breadboards", Charles Hamilton, Gursel Alici, Marc In Het Panhuis Jan 2018

3d Printing Vegemite And Marmite: Redefining "Breadboards", Charles Hamilton, Gursel Alici, Marc In Het Panhuis

Australian Institute for Innovative Materials - Papers

The ability to use Food Layered Manufacturing (FLM) to fabricate attractive food presentations and incorporate additives that can alter texture, nutrition, color, and flavor have made it widely investigated for combatting various issues in the food industry. For a food item to be FLM compatible, it must possess suitable rheological properties to allow for its extrusion and to keep its 3D printed structure. Here, we present a rheological analysis of two commercially available breakfast spreads, Vegemite and Marmite, and show their compatibility with FLM in producing 3D structures onto bread substrates. Furthermore, we demonstrated that these materials can be used ...


Thickness Dependence Of Dendritic Flux Avalanches In Yba2cu3o7-Xfilms, E Baruch-El, M Baziljevich, Tom H. Johansen, A Shaulov, Y Yeshurun Jan 2018

Thickness Dependence Of Dendritic Flux Avalanches In Yba2cu3o7-Xfilms, E Baruch-El, M Baziljevich, Tom H. Johansen, A Shaulov, Y Yeshurun

Australian Institute for Innovative Materials - Papers

By implementing a unique magneto-optical system with ultrafast magnetic-field ramping-rate capability (up to 3 kT/s), we have been able to routinely generate and image dendritic flux instabilities in YBa 2 Cu 3 O 7-x films. In the present work we study the effect of the film thickness on the dendritic instability. Dendritic avalanches in 50-600 nm thick films were magneto-optically imaged at 7 K, after ramping the magnetic field from zero to 60 mT at different rates. The data reveal a remarkable change in flux morphologies between the thin and the thicker films. While the former (50-250 nm) display ...


Frequency And Wavenumber Selective Excitation Of Spin Waves Through Coherent Energy Transfer From Elastic Waves, Yusuke Hashimoto, Davide Bossini, Tom H. Johansen, Eiji Saitoh, Andrei Kirilyuk, Theo Rasing Jan 2018

Frequency And Wavenumber Selective Excitation Of Spin Waves Through Coherent Energy Transfer From Elastic Waves, Yusuke Hashimoto, Davide Bossini, Tom H. Johansen, Eiji Saitoh, Andrei Kirilyuk, Theo Rasing

Australian Institute for Innovative Materials - Papers

Using spin-wave tomography (SWaT), we have investigated the excitation and the propagation dynamics of optically excited magnetoelastic waves, i.e., hybridized modes of spin waves and elastic waves, in a garnet film. By using time-resolved SWaT, we reveal the excitation dynamics of magnetoelastic waves through coherent-energy transfer between optically excited pure-elastic waves and spin waves via magnetoelastic coupling. This process realizes frequency and wavenumber selective excitation of spin waves at the crossing of the dispersion relations of spin waves and elastic waves. Finally, we demonstrate that the excitation mechanism of the optically excited pure-elastic waves, which are the source of ...


Si Nanocrystal-Embedded Sioxnanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials, Hyundong Yoo, Eunjun Park, Juhye Bae, Jaewoo Lee, Dong Jae Chung, Yong Jo, Min-Sik Park, Jung Ho Kim, Shi Xue Dou, Young-Jun Kim, Hansu Kim Jan 2018

Si Nanocrystal-Embedded Sioxnanofoils: Two-Dimensional Nanotechnology-Enabled High Performance Li Storage Materials, Hyundong Yoo, Eunjun Park, Juhye Bae, Jaewoo Lee, Dong Jae Chung, Yong Jo, Min-Sik Park, Jung Ho Kim, Shi Xue Dou, Young-Jun Kim, Hansu Kim

Australian Institute for Innovative Materials - Papers

Silicon (Si) based materials are highly desirable to replace currently used graphite anode for lithium ion batteries. Nevertheless, its usage is still a big challenge due to poor battery performance and scale-up issue. In addition, two-dimensional (2D) architectures, which remain unresolved so far, would give them more interesting and unexpected properties. Herein, we report a facile, cost-effective, and scalable approach to synthesize Si nanocrystals embedded 2D SiO x nanofoils for next-generation lithium ion batteries through a solution-evaporation-induced interfacial sol-gel reaction of hydrogen silsesquioxane (HSiO 1.5 , HSQ). The unique nature of the thus-prepared centimeter scale 2D nanofoil with a large ...


Three-Dimensional Printing And Cell Therapy For Wound Repair, Sylvia Van Kogelenberg, Zhilian Yue, Jeremy Dinoro, Christopher Baker, Gordon G. Wallace Jan 2018

Three-Dimensional Printing And Cell Therapy For Wound Repair, Sylvia Van Kogelenberg, Zhilian Yue, Jeremy Dinoro, Christopher Baker, Gordon G. Wallace

Australian Institute for Innovative Materials - Papers

Significance: Skin tissue damage is a major challenge and a burden on healthcare systems, from burns and other trauma to diabetes and vascular disease. Although the biological complexities are relatively well understood, appropriate repair mechanisms are scarce. Three-dimensional bioprinting is a layer-based approach to regenerative medicine, whereby cells and cell-based materials can be dispensed in fine spatial arrangements to mimic native tissue. Recent Advances: Various bioprinting techniques have been employed in wound repair-based skin tissue engineering, from laser-induced forward transfer to extrusion-based methods, and with the investigation of the benefits and shortcomings of each, with emphasis on biological compatibility and ...