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7,363 full-text articles. Page 6 of 289.

On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma 2019 National Academy of Sciences of Ukraine

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.


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 2019 University of Wollongong

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 ...


Modelling The X-Ray Source For The Australian Mri-Linac, Natalia Roberts, Bradley M. Oborn, U Jelen, B Dong, Jarrad Begg, Armia George, Saree Alnaghy, Trent Causer, Thahabah Alharthi, Lois C. Holloway, Peter E. Metcalfe 2019 University of Wollongong, Ingham Institute for Applied Medical Research

Modelling The X-Ray Source For The Australian Mri-Linac, Natalia Roberts, Bradley M. Oborn, U Jelen, B Dong, Jarrad Begg, Armia George, Saree Alnaghy, Trent Causer, Thahabah Alharthi, Lois C. Holloway, Peter E. Metcalfe

Faculty of Engineering and Information Sciences - Papers: Part B

MRI-guided radiotherapy allows real-time imaging during treatment however the magnetic field influences the dose distribution in the patient. An accurate model of the radiation beam and the encompassing magnetic field is important to predict dosimetry changes. The purpose of this work is to develop a Monte Carlo model of the Australian MRI-Linac to be used as input into a dose calculation tool for treatment planning. The Australian MRI-Linac is a 1 T inline system with a 6MV flattening filter free photon beam. Commissioning measurements were undertaken both with and without the magnetic field present, PDDs and profiles were used to ...


Characterization Of Prompt Gamma Ray Emission For In Vivo Range Verification In Particle Therapy: A Simulation Study, Melek Zarifi, Susanna Guatelli, Yujin Qi, David Bolst, Dale A. Prokopovich, Anatoly B. Rosenfeld 2019 University of Wollongong

Characterization Of Prompt Gamma Ray Emission For In Vivo Range Verification In Particle Therapy: A Simulation Study, Melek Zarifi, Susanna Guatelli, Yujin Qi, David Bolst, Dale A. Prokopovich, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper we investigate the emission and detection characteristics of prompt gamma (PG) rays for in vivo range verification during hadron therapy, using Geant4 simulations. Proton, 4 He and 12 C beams of varying energy are incident on water phantoms. The PG production yield, energy spectral characteristics and spatial correlation with the Bragg Peak (BP) have been quantified. Further, the angular distributions for PG detection with respect to a point-of-reference on the phantom surface have been explored. The temporal properties of PG emission and time-of-flight (TOF) of PG detection have also been investigated in correlation with the changing particle ...


Monte Carlo Investigation Of The Characteristics Of Radioactive Beams For Heavy Ion Therapy, Andrew Chacon, Mitra Safavi-Naeini, David Bolst, Susanna Guatelli, Daniel R. Franklin, Yuma Iwao, Go Akamatsu, Hideaki Tashima, Eiji Yoshida, Fumihiko Nishikido, Atsushi Kitagawa, Akram Mohammadi, Marie-Claude Gregoire, Taiga Yamaya, Anatoly B. Rosenfeld 2019 University of Wollongong, Australian Nuclear Science and Technology Organisation (ANSTO)

Monte Carlo Investigation Of The Characteristics Of Radioactive Beams For Heavy Ion Therapy, Andrew Chacon, Mitra Safavi-Naeini, David Bolst, Susanna Guatelli, Daniel R. Franklin, Yuma Iwao, Go Akamatsu, Hideaki Tashima, Eiji Yoshida, Fumihiko Nishikido, Atsushi Kitagawa, Akram Mohammadi, Marie-Claude Gregoire, Taiga Yamaya, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.


Superconducting Pair-Breaking Under Intense Sub-Gap Terahertz Radiation, Jie Tian, Jack Zuber, Sunchao Huang, C Zhang 2019 University of Wollongong

Superconducting Pair-Breaking Under Intense Sub-Gap Terahertz Radiation, Jie Tian, Jack Zuber, Sunchao Huang, C Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

We study the effect of a strong and low frequency (ω < Δ, the superconducting gap) electrical field on a superconducting state. It is found that the superconducting gap decreases with the field intensity and wavelength. The physical mechanism for this dependence is the multiphoton absorption by a superconducting electron. By constructing the state of a superconducting electron dressed by photons, we determined the dependence of the superconducting gap on E / ω and temperature. We show that the critical temperature is determined by the parameter E / ω which is distinct from that induced by the heating effect. The result is consistent with experimental findings. This result can be applied to study terahertz nonlinear superconducting metamaterials.


The Influence Of Sorption Pressure On Gas Diffusion In Coal Particles: An Experimental Study, Xin Yang, Gongda Wang, Junying Zhang, Ting X. Ren 2019 China University of Mining and Technology, China Coal Research Institute

The Influence Of Sorption Pressure On Gas Diffusion In Coal Particles: An Experimental Study, Xin Yang, Gongda Wang, Junying Zhang, Ting X. Ren

Faculty of Engineering and Information Sciences - Papers: Part B

Gas pressure changes during the process of coal mine gas drainage and CBM recovery. It is of great importance to understand the influence of sorption pressure on gas diffusion; however, the topic remains controversial in past studies. In this study, four samples with different coal ranks were collected and diffusion experiments were conducted under different pressures through the adsorption and desorption processes. Three widely used models, i.e., the unipore diffusion (UD) model, the bidisperse diffusion (BD) model and the dispersive diffusion (DD) model, were adopted to compare the applicability and to calculate the diffusion coefficients. Results show that for ...


Predicted Behavior Of Saturated Granular Waste Blended With Rubber Crumbs, Yujie Qi, Buddhima Indraratna, Matthew Richard Coop 2019 University of Wollongong

Predicted Behavior Of Saturated Granular Waste Blended With Rubber Crumbs, Yujie Qi, Buddhima Indraratna, Matthew Richard Coop

Faculty of Engineering and Information Sciences - Papers: Part B

Recycling waste materials, such as steel furnace slag (SFS), coal wash (CW), and rubber crumbs (RC) for transport infrastructure is environmentally friendly and offers significant economic benefits. This paper presents a fundamental study of the geotechnical characteristics of this blended matrix (SFSþCWþRC). A semiempirical constitutive model for SFSþCWþRC mixtures is proposed within the framework of critical state (CS) soil mechanics and based on the bounding surface plasticity theory. A CS surface is formulated with the changing RC contents in the waste mixtures, and an experimental relationship between the total work input (Wtotal) and CS parameter (Mcs) is established to capture ...


Flood Mitigation Using An Innovative Flood Control Scheme In A Large Lake: Dongting Lake, China, Yizhuang Liu, Shu-qing Yang, Changbo Jiang, Muttucumaru Sivakumar, Keith Enever, Yuannan Long, Bin Deng, Usman Khalil, Lingshi Yin 2019 Changsha University of Science And Technology, University of Wollongong

Flood Mitigation Using An Innovative Flood Control Scheme In A Large Lake: Dongting Lake, China, Yizhuang Liu, Shu-Qing Yang, Changbo Jiang, Muttucumaru Sivakumar, Keith Enever, Yuannan Long, Bin Deng, Usman Khalil, Lingshi Yin

Faculty of Engineering and Information Sciences - Papers: Part B

A large lake plays an important role in mitigating flood disasters in its nearby regions during the flooding period; however, the effect is limited, because most of its storage capacity becomes dead storage prior to the arrival of the flood wave. In the current study, an innovative flood control scheme (IFCS) is applied to Dongting Lake (the second largest freshwater lake in China) to alleviate flood disasters. MIKE 21 FM was used to examine its feasibility to mitigate flood disasters. One of the largest floods in the 20th century, the 1998-type flood, was modelled and the maximum water levels with ...


Steady Laminar Natural Convection Of Nanofluid Under The Impact Of Magnetic Field On Two-Dimensional Cavity With Radiation, S Saleem, Trung Nguyen-Thoi, Ahmad Shafee, Zhixiong Li, Ebenezer Bonyah, A Khan, Iqra Shehzadi 2019 King Khalid University

Steady Laminar Natural Convection Of Nanofluid Under The Impact Of Magnetic Field On Two-Dimensional Cavity With Radiation, S Saleem, Trung Nguyen-Thoi, Ahmad Shafee, Zhixiong Li, Ebenezer Bonyah, A Khan, Iqra Shehzadi

Faculty of Engineering and Information Sciences - Papers: Part B

In current investigation, steady free convection of nanofluid has been presented in occurrence of magnetic field. Non-Darcy model was utilized to employ porous terms in momentum equations. Working fluid is H2O based nanofluid. Radiation effect has been reported for various shapes of nanoparticles. Impacts of shape factor, radiation parameter, magnetic force, buoyancy and shape impact on nanofluid treatment were demonstrated. Result demonstrated that maximum convective flow is observed for platelet shape. Darcy number produces more random patterns of isotherms.


Analysis Of Surface Roughness Evolution Of Ferritic Stainless Steel Using Crystal Plasticity Finite Element Method, Xiaoguang Ma, Jingwei Zhao, Wei Du, Xin Zhang, Zhengyi Jiang 2019 University of Wollongong

Analysis Of Surface Roughness Evolution Of Ferritic Stainless Steel Using Crystal Plasticity Finite Element Method, Xiaoguang Ma, Jingwei Zhao, Wei Du, Xin Zhang, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

In order to evaluate the surface quality of ferritic stainless steel (FSS) sheets tensile deformation, a crystal plasticity (CP) model, in which the constitutive laws were incorporated with the consideration of the heterogeneous distribution of the properties of grains, was established to analyse the effect of texture, grain sizes and initial surface roughness on the surface roughness evolution of FSS sheets. The electron backscatter diffraction (EBSD) tests were performed to characterise the texture and the grains. A tensile test of the represent volume was simulated and further verified by experimental results. The numerical simulation results indicate that the surface roughness ...


Numerical And Experimental Studies On A New Variable Stiffness And Damping Magnetorheological Fluid Damper, Hui Huang, Shuaishuai Sun, Shumei Chen, Weihua Li 2019 Fuzhou University

Numerical And Experimental Studies On A New Variable Stiffness And Damping Magnetorheological Fluid Damper, Hui Huang, Shuaishuai Sun, Shumei Chen, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

This article describes a new magnetorheological fluid damper; its damping and stiffness are variable and controllable through the compact structure of two damping units and a spring. The ability of variable stiffness and damping enables it to be used for more effective vibration control in wide-band excitation wave occasions. First, the effective stiffness and output damping force are calculated in theory. Then, the magnetic field is simulated by finite element analysis. After the prototype of the new magnetorheological fluid damper is developed and machined, the damper's performances are tested in a hydraulic actuated MTS machine, including stiffness variability and ...


Conditionally Integrable Nonlinear Diffusion With Diffusivity 1/U, Philip Broadbridge, Joanna M. Goard 2019 La Trobe University, University of Wollongong

Conditionally Integrable Nonlinear Diffusion With Diffusivity 1/U, Philip Broadbridge, Joanna M. Goard

Faculty of Engineering and Information Sciences - Papers: Part B

An explicit mapping is given from the space of general complex meromorphic functions to a space of special time-dependent solutions of the 1 + 2-dimensional nonlinear diffusion equation with diffusivity depending on concentration as D = 1/u. These solutions have constant-flux boundary conditions. Some simple examples are constructed, including that of a line source enclosed by a cylindrical barrier. This has direct application to electron diffusion in a laser-heated plasma.


Carbon Nanotube Based Fiber Supercapacitor As Wearable Energy Storage, Zan Lu, Raad Raad, Farzad Safaei, Jiangtao Xi, Zhoufeng Liu, Javad Foroughi 2019 Shanghai University of Engineering Science

Carbon Nanotube Based Fiber Supercapacitor As Wearable Energy Storage, Zan Lu, Raad Raad, Farzad Safaei, Jiangtao Xi, Zhoufeng Liu, Javad Foroughi

Faculty of Engineering and Information Sciences - Papers: Part B

Energy storage is a key requirement for the emerging wearable technologies. Recent progress in this direction includes the development of fiber based batteries and capacitors and even some examples of such fibers incorporated into prototype textiles. Herein we discuss the advantages of using the wet-spinning process to create nanostructured carbon basedmaterials as wearable energy storage. The ability to control the physical, mechanical, electrical, and electrochemical properties of carbon nanotube based fibers holds great promise to develop smart polymeric structure as an energy storing materials including fibers and textiles. This is the first comprehensive review to discuss effect of nanostructured energy ...


End-To-End Multimodal 16-Day Hatching Eggs Classification, Lei Geng, Zhen Peng, Zhitao Xiao, Jiangtao Xi 2019 Tianjin Polytechnic University, Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems

End-To-End Multimodal 16-Day Hatching Eggs Classification, Lei Geng, Zhen Peng, Zhitao Xiao, Jiangtao Xi

Faculty of Engineering and Information Sciences - Papers: Part B

Sixteen-day hatching eggs are divided into fertile eggs, waste eggs, and recovered eggs. Because different categoriesmayhave the same characteristics, they are difficult to classify. Fewexisting algorithms can successfully solve this problem. To this end, we propose an end-to-end deep learning network structure that uses multiple forms of signals. First, we collect the photoplethysmography (PPG) signal of the hatching eggs to obtain heartbeat information and photograph hatching eggs with a camera to obtain blood vessel pictures. Second, we use two different network structures to process the two kinds of signals: Temporal convolutional networks are used to process heartbeat information, and convolutional ...


Evaluation Of Coal Seam Gas Drainability For Outburst-Prone And High-Co2-Containing Coal Seam, Lei Zhang, Ting X. Ren, Naj Aziz, Cun Zhang 2019 China University of Mining and Technology

Evaluation Of Coal Seam Gas Drainability For Outburst-Prone And High-Co2-Containing Coal Seam, Lei Zhang, Ting X. Ren, Naj Aziz, Cun Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents the results of an evaluation study of gas drainability in the Bulli seam in the Southern Coalfield of the Sydney Basin, NSW, Australia, where the coal seam gas (CSG) contains a high proportion of carbon dioxide (CO 2 ). Historically the gas drainability in some particular areas of this coal seam was found to be particularly poor, which posed a significant challenge to gas predrainage. As a result, a large volume of greenhouse gases were released to the atmosphere during mining of the coal seam. Furthermore, the high gas content associated with the CO 2 -rich composition also ...


Whitmore Tension Section And Block Shear, Matthew Elliott, Lip H. Teh 2019 University of Wollongong

Whitmore Tension Section And Block Shear, Matthew Elliott, Lip H. Teh

Faculty of Engineering and Information Sciences - Papers: Part B

This paper examines the validity of the Whitmore net section tension capacity for the design of bolted gusset plates. Using simple algebra, this paper first shows that the Whitmore criterion and the correct block shear criterion would give similar results for a standard connection having approximately seven rows of bolts. It then shows that the Whitmore criterion severely underestimates the actual capacities of connections having two or three bolt rows tested by independent researchers. Conversely, it also shows that the same criterion overestimates the capacities of connections having nine bolt rows that were believed by the testing researchers to fail ...


Experimental Testing And Modelling Of A Rotary Variable Stiffness And Damping Shock Absorber Using Magnetorheological Technology, Lei Deng, Shuaishuai Sun, Matthew Christie, Jian Yang, Donghong Ning, Xiaojing Zhu, Haiping Du, Shiwu Zhang, Weihua Li 2019 University of Wollongong

Experimental Testing And Modelling Of A Rotary Variable Stiffness And Damping Shock Absorber Using Magnetorheological Technology, Lei Deng, Shuaishuai Sun, Matthew Christie, Jian Yang, Donghong Ning, Xiaojing Zhu, Haiping Du, Shiwu Zhang, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

This article presents a novel rotary shock absorber which combines the abilities of variable stiffness and variable damping by assembling a set of two magnetorheological damping units, one of which being placed in series with a rubber spring. This allows the damping and stiffness to be controlled independently by the internal damping and the external damping units, respectively. A test bench was established to verify the variable stiffness and damping functionality. The experimental results for variable damping test, variable stiffness test and co-working test are presented. At the amplitude of 10° and the frequency 0.5 Hz, increases of 141 ...


Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li 2019 University of Wollongong

Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

Functional liquid metal nanoparticles (NPs), produced from eutectic alloys of gallium, promise new horizons in the fields of sensors, microfluidics, flexible electronics, catalysis, and biomedicine. Here, the development of a vapor cavity generating ultrasonic platform for nebulizing liquid metal within aqueous media for the one-step production of stable and functional liquid metal NPs is shown. The size distribution of the NPs is fully characterized and it is demonstrated that various macro and small molecules can also be grafted onto these liquid metal NPs during the liquid-based nebulization process. The cytotoxicity of the NPs grafted with different molecules is further explored ...


Precipitation Strengthening In Ni-Cu Alloys Fabricated Using Wire Arc Additive Manufacturing Technology, Olexandra Marenych, Andrii Kostryzhev, Chen Shen, Zengxi Stephen Pan, Hui Jun Li, Stephen van Duin 2019 University of Wollongong, Defence Materials Technology Centre

Precipitation Strengthening In Ni-Cu Alloys Fabricated Using Wire Arc Additive Manufacturing Technology, Olexandra Marenych, Andrii Kostryzhev, Chen Shen, Zengxi Stephen Pan, Hui Jun Li, Stephen Van Duin

Faculty of Engineering and Information Sciences - Papers: Part B

Two Ni-Cu alloys, Monel K500 and FM60, with various contents of Ti, Mn, Al, Fe and C were deposited in the form of plates on a metal base plate using wire arc additive manufacturing technology. Three deposition speeds have been applied: 300, 400 and 500 mm/min. To modify the as-welded microstructure and properties, the deposited walls/plates have been subjected to two heat treatment procedures: annealing at 1100◦C for 15 min, slow cooling to 610◦C, ageing at this temperature for 8 h and either (i) air cooling to room temperature or (ii) slow cooling to 480◦C ...


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