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Full-Text Articles in Engineering
Globular Reduced Graphene Oxide-Metal Oxide Structures For Energy Storage Applications, Alfred Chidembo, Seyed Hamed Aboutalebi, Konstantin Konstantinov, Maryam Salari, Brad R. Winton, Sima Aminorroaya-Yamini, Ivan Nevirkovets, Hua-Kun Liu
Globular Reduced Graphene Oxide-Metal Oxide Structures For Energy Storage Applications, Alfred Chidembo, Seyed Hamed Aboutalebi, Konstantin Konstantinov, Maryam Salari, Brad R. Winton, Sima Aminorroaya-Yamini, Ivan Nevirkovets, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
In this work, we employed an in situ spray pyrolysis approach to fabricate metal oxide-graphene composites with highly porous morphologies.The materials exhibited unique globular structures comprising metal oxide nanoparticles embedded between graphene sheets with high capacitance.
Characterization Of A Novel Diamond-Based Microdosimeter Prototype For Radioprotection Applications In Space Environments, Jeremy A. Davis, Kumaravelu Ganesan, Andrew D. C Alves, Susanna Guatelli, Marco Petasecca, Jayde Livingstone, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Rainer M. Siegele, Steven Prawer, David Jamieson, Zdenka Kuncic, Vincent L. Pisacane, John F. Dicello, James Ziegler, Marco Zaider, Anatoly B. Rosenfeld
Characterization Of A Novel Diamond-Based Microdosimeter Prototype For Radioprotection Applications In Space Environments, Jeremy A. Davis, Kumaravelu Ganesan, Andrew D. C Alves, Susanna Guatelli, Marco Petasecca, Jayde Livingstone, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Rainer M. Siegele, Steven Prawer, David Jamieson, Zdenka Kuncic, Vincent L. Pisacane, John F. Dicello, James Ziegler, Marco Zaider, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
This paper is dedicated to the characterization of a novel diamond microdosimeter prototype with 3D sensitive volumes produced by high energy boron implantation. Diamond has been chosen in order to further improve solid state based microdosimeter in terms of radiation hardness and tissue equivalency. IBIC measurements were undertaken to determine the charge collection efficiency map of the device. It was demonstrated that the proposed ion implantation technology allows for the formation of an array of well defined 3D SVs. A Geant4 application was developed to explain the effect of Al electrode thickness on observed anomaly in deposited energy. Specifics of …
Shear Strength Model For Sediment-Infilled Rock Discontinuities And Field Applications, Buddhima Indraratna, Wuditha N. Premadasa, Jan Anton Nemcik, Mylvaganam Jayanathan
Shear Strength Model For Sediment-Infilled Rock Discontinuities And Field Applications, Buddhima Indraratna, Wuditha N. Premadasa, Jan Anton Nemcik, Mylvaganam Jayanathan
Faculty of Engineering - Papers (Archive)
Discontinuities have a great influence on the reduction of rock mass shear strength depending on the geometry, roughness and the nature of infill sediments. These discontinuities are generally filled with different types of sediments. When the infill sediments are saturated, they make a considerable impact on the overall strength of the rock mass. Most infilled discontinuities in the field are overconsolidated due to various factors such as climatic and weathering conditions, as well as hydrothermal alteration. The increase in the thickness of joint infill subdues the otherwise prominent role of joint roughness. This paper presents some of the existing mathematical …
Dispersion Of Sno2 Nanocrystals On Tio2(B) Nanowires As Anode Material For Lithium Ion Battery Applications, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Dispersion Of Sno2 Nanocrystals On Tio2(B) Nanowires As Anode Material For Lithium Ion Battery Applications, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Faculty of Engineering - Papers (Archive)
TiO2(B)@SnO2 core–shell hybrid nanowires have been synthesized by a facile hydrothermal process and subsequent liquid phase reaction. Hybrid nanowire electrodes exhibit excellent reversible lithium storage capacity rate capability and good cyclability, mainly due to the particular architecture of the composite, which features an open continuous channel along its axis, facilitating lithium ion diffusion, and provides effective mechanical support for the TiO2(B) core, alleviating the stress produced during discharge–charge cycling and also preventing the pulverization of the Sn nanoparticles. Owing to its superior electrochemical performance, this composite could be a promising potential anode material for lithium …
Radiochromic Film Dosimetry And Its Applications In Radiotherapy, Matthew J. Williams, Peter E. Metcalfe
Radiochromic Film Dosimetry And Its Applications In Radiotherapy, Matthew J. Williams, Peter E. Metcalfe
Faculty of Engineering - Papers (Archive)
Radiochromic film can be a fast and inexpensive means for performing accurate quantitative radiation dosimetry. The development of new radiochromic compositions that have greater dose sensitivity and fewer environmental dependencies has led to an ever increasing use of the film in radiotherapy applications. In this report the various physical and dosimetric properties of radiochromic film are presented and the strategies to adequately manage these properties when using radiochromic film for radiotherapy applications are discussed.
Novel Spp Water Management Strategy And Its Applications, Shu-Qing Yang, Bo-Qiang Qin, Pengzhi Lin
Novel Spp Water Management Strategy And Its Applications, Shu-Qing Yang, Bo-Qiang Qin, Pengzhi Lin
Faculty of Engineering - Papers (Archive)
Clean freshwater is the most precious resource in the world and the development of water resources has had a very long history, as early as humans changed from being hunters and food collectors to modern civilization. At very early stage, people had to rely on creeks, rivers and lakes for their water demand that was relatively small, and today humans have accumulated the knowledge and techniques for water storage, building artificial lakes or reservoirs to meet their huge water demand due to industrialization and urbanization. The Wworld’s earliest large dam was the Sadd-el-kafara Dam built in Egypt between 2950 and …
Simulation Of Low Dose Positron Emission Mammography Scanner For Global Breast Health Applications, W. J Ryder, I. N Wienberg, P. S Stepanov, A Reznik, M Urdaneta, E Anashkin, M. A Masoomi, Anatoly B. Rosenfeld
Simulation Of Low Dose Positron Emission Mammography Scanner For Global Breast Health Applications, W. J Ryder, I. N Wienberg, P. S Stepanov, A Reznik, M Urdaneta, E Anashkin, M. A Masoomi, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
Positron emission mammography ("PEM") is a breast imaging modality that typically involves the administration of relatively high doses of radiotracer. In order to reduce tracer costs and consider PEM for global screening applications, it would be helpful to reduce the required amount of administered radiotracer so that patient dose would be comparable to conventional x-ray mammograms. We performed GATE Monte Carlo investigations of several possible camera configurations. Increasing the detector thickness from 10 to 30 mm, increasing the camera surface area from 5 x 20cm2 to 20 x 20cm2, and applying depth-ofinteraction information to increase the acceptance angle, increased the …
Fast And Accurate Proton Computed Tomography Image Reconstruction For Applications In Proton Therapy, Scott Penfold, R. W. Schulte, V. Bashkirov, Anatoly B. Rosenfeld
Fast And Accurate Proton Computed Tomography Image Reconstruction For Applications In Proton Therapy, Scott Penfold, R. W. Schulte, V. Bashkirov, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
Proton computed tomography has been suggested as a means for maximizing the potential benefits of proton radiation therapy. By measuring individual proton energy losses after traversing an object and predicting paths of maximum likelihood through the image space, relative stopping power maps can be generated for treatment planning and image guidance. However, the processes of proton interaction with the imaged object lead to a number of challenges in the image reconstruction procedure. In this work we describe our approach to obtaining accurate relative stopping power maps in the shortest amount of time.
Superconducting Magnetic Energy Storage Systems For Power System Applications, Danny Soetanto, K.W.E Cheng
Superconducting Magnetic Energy Storage Systems For Power System Applications, Danny Soetanto, K.W.E Cheng
Faculty of Engineering - Papers (Archive)
Advancement in both superconducting technologies and power electronics led to High Temperature Superconducting Magnetic Energy Storage Systems (SMES) having some excellent performances for use in power systems, such as rapid response (millisecond), high power (multi-MW), high efficiency, and four- quadrant control. This paper provides a review on SMES applications to power systems.
Evaluation Of Silicon Detectors With Integrated Jfet For Biomedical Applications, Mitra Safavi-Naeini, D. Franklin, Michael L. Lerch, Marco Petasecca, Giorgio U. Pignatel, Mark I. Reinhard, G. F. Dalla Betta, N. Zorzi, Anatoly B. Rosenfeld
Evaluation Of Silicon Detectors With Integrated Jfet For Biomedical Applications, Mitra Safavi-Naeini, D. Franklin, Michael L. Lerch, Marco Petasecca, Giorgio U. Pignatel, Mark I. Reinhard, G. F. Dalla Betta, N. Zorzi, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
This paper presents initial results from electrical, spectroscopic and ion beam induced charge (IBIC) characterisation of a novel silicon PIN detector, featuring an on-chip n -channel JFET and matched feedback capacitor integrated on its p-side (frontside). This structure reduces electronic noise by minimising stray capacitance and enables highly efficient optical coupling between the detector back-side and scintillator, providing a fill factor of close to 100%. The detector is specifically designed for use in high resolution gamma cameras, where a pixellated scintillator crystal is directly coupled to an array of silicon photodetectors. The on-chip JFET is matched with the photodiode …
Applications Of Hydraulic Properties Models On Microscopic Flow In Unsaturated Porous Media, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Applications Of Hydraulic Properties Models On Microscopic Flow In Unsaturated Porous Media, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Faculty of Engineering - Papers (Archive)
Several existing equations for solving the non-linear soil-hydraulic properties are introduced and validated to field and laboratory measured data. Models for non-linear hydraulic properties of unsaturated porous media arise from statistical and mathematical fit through the measured data and they can be expressed in forms of unsaturated permeability versus either pressure head or volumetric moisture content. This paper presents the difference models: Gardner, Knuze et al., Haverkamp et al., van Genuchten and Saxton et al. for calculation of hydraulic properties coefficients, typicallyunsaturated permeability. The accurate and computational efficiency of these five existing models are evaluated for a series of study …
Mre Properties Under Shear And Squeeze Modes And Applications, Kristin Popp, Matthias Kroger, Weihua Li, Xianzhou Zhang, Prabuono B. Kosasih
Mre Properties Under Shear And Squeeze Modes And Applications, Kristin Popp, Matthias Kroger, Weihua Li, Xianzhou Zhang, Prabuono B. Kosasih
Faculty of Engineering - Papers (Archive)
Magnetorheological elastomers (MREs) are smart materials whose mechanical properties, like their modulus and elasticity, can be controlled by an external magnetic field. This feature has resulted in a number of novel applications, such as adaptive tuned dynamic vibration absorbers for suppressing unwanted vibrations over a wide frequency range. MRE-based devices operate in different modes, such as shear mode and squeeze mode; however, the study of mechanical performances of MREs under squeeze mode is very rare. This article aims to investigate MRE performances under both shear and squeeze modes. Experimental studies and simulations were conducted to analyze the MR effect in …
Critical Risk Points Of Nanofiltration And Reverse Osmosis Processes In Water Recycling Applications, Long Nghiem, Andrea Schaefer
Critical Risk Points Of Nanofiltration And Reverse Osmosis Processes In Water Recycling Applications, Long Nghiem, Andrea Schaefer
Faculty of Engineering - Papers (Archive)
NF/RO membrane filtration processes have been recognized as an important technology to facilitate water recycling. Those processes are well-proven technologies, which can be used to remove a wide range of contaminants including trace contaminants that are of particular concern in water recycling. However, risk implications in association with brine or concentrate and membrane cleaning wastewater disposal have to date not been adequately understood. This study examines the adsorption and release process of several endocrine-disrupting chemicals (EDCs) during NF/RO filtration processes. Results reported here indicate that the membrane can serve as a large reservoir for EDCs and their release may be …
Modelling And Simulation Of The Magnetically Impelled Arc Butt (Miab) Process For Transmission Pipeline Applications, John Norrish, Dominic Cuiuri, Mohammad Hossain
Modelling And Simulation Of The Magnetically Impelled Arc Butt (Miab) Process For Transmission Pipeline Applications, John Norrish, Dominic Cuiuri, Mohammad Hossain
Faculty of Engineering - Papers (Archive)
Early patents for the Magnetically Impelled Arc Butt process (MIAB) date back to 1940 [1] and the basic principles of the process have remained unchanged from this time. The process was however refined in the 1970s for use in the production of automotive components and has been used extensively in this area. Investigation of the process for pipe girth welding have been reported and commercial pipe welding heads are reported to be available in the Ukraine [2], Although the process is well established it is believed that a more fundamental analysis of the mechanisms involved would assist in the optimisation …
Critical Risk Points Of Nf/Ro Membrane Filtration Processes In Water Recycling Applications, Long Nghiem, Andrea I. Schaefer
Critical Risk Points Of Nf/Ro Membrane Filtration Processes In Water Recycling Applications, Long Nghiem, Andrea I. Schaefer
Faculty of Engineering - Papers (Archive)
NF/RO membrane filtration processes have been recognized as an important technology to facilitate water recycling. Those processes are well-proven technologies, which can be used to remove a wide range of contaminants including trace contaminants that are of particular concern in water recycling. However, risk implications in association with brine or concentrate and membrane cleaning wastewater disposal have to date not been adequately understood. This study examines the adsorption and release process of several endocrine-disrupting chemicals (EDCs) during NF/RO filtration processes. Results reported here indicate that the membrane can serve as a large reservoir for EDCs and their release may be …
A General Review Of Applications Of Artificial Neural Network To Water Industry, Xin Mi, Muttucumaru Sivakumar
A General Review Of Applications Of Artificial Neural Network To Water Industry, Xin Mi, Muttucumaru Sivakumar
Faculty of Engineering - Papers (Archive)
This paper presents case studies of applications of artificial neural network (ANN) to water industry including water treatment, water quality and water consumption. Overall, ANN was found to be superior to time series and multiple regression analysis for most applications. At the same time, however, ANN is a data driven model, so care has to be taken in preparing data for ANN models. Limitations of the current ANN study to coagulant dosages in water treatment plants are presented and further ANN improvements in this field are in progress.