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Development Of A Metallurgical Coke Analogue To Investigate The Effects Of Coke Mineralogy On Coke Reactivity, Raymond Longbottom, Brian J. Monaghan, Oliver Scholes, Merrick R. Mahoney
Development Of A Metallurgical Coke Analogue To Investigate The Effects Of Coke Mineralogy On Coke Reactivity, Raymond Longbottom, Brian J. Monaghan, Oliver Scholes, Merrick R. Mahoney
Faculty of Engineering - Papers (Archive)
In this study the suitability of a laboratory analogue for coke for studying the effects of minerals on the reactivity of coke was evaluated. In addition to this, the effects of different physical properties and production conditions on the reactivity of the coke analogue were also tested. The coke analogue was used for control testing of specific mineral, and to some degree maceral, effects on reactivity. Such information would improve our fundamental understanding of coke reactivity behaviour and could be used to develop more accurate predictive models of coke strength after reaction (CSR) or associated indices and coke properties. The …
Phase Development In Carbothermal Reduction And Nitridation Of Ilmenite Concentrates, Sheikh A. Rezan, Guangqing Zhang, Oleg Ostrovski
Phase Development In Carbothermal Reduction And Nitridation Of Ilmenite Concentrates, Sheikh A. Rezan, Guangqing Zhang, Oleg Ostrovski
Faculty of Engineering - Papers (Archive)
The phase development in the course of carbothermal reduction and nitridation of ilmentie concentrates and synthetic rutile was studied in temperature programmed reduction (623-1873 K) and isothermal reduction experiments. Ilmenites and synthetic rutile were reduced in a tube reactor with continuously flowing hydrogen-nitrogen mixture or pure nitrogen. The rate and extent of reduction were monitored by online off-gas analysis. Samples reduced to different extent were subjected to XRD and SEM/BSE analyses. Pseudorutile and ilmenite were the main phases in ilmenite concentrates; rutile was the main phase in synthetic rutile. Pseudorutile was first converted to ilmenite and titania which occurred at …
Teaching Monte Carlo Codes At University: Development Of A Geant4 Course For Students Of Schools Of Physics, Susanna Guatelli, Dean Cutajar, Anatoly B. Rosenfeld, Catherine Layton
Teaching Monte Carlo Codes At University: Development Of A Geant4 Course For Students Of Schools Of Physics, Susanna Guatelli, Dean Cutajar, Anatoly B. Rosenfeld, Catherine Layton
Faculty of Engineering and Information Sciences - Papers: Part A
Nowadays, it is important that students of Schools of Physics include the study of Monte Carlo codes in their curriculum as these codes are widely used in research. At the School of Engineering Physics of the University of Wollongong, we designed and set in place a Geant4 course addressed to the Medical Physics domain. In this paper, we illustrate the main features of the course and its development since 2010. The design of this course maybe adopted to teach Geant4 or any other Monte Carlo code, and in general to teach complex software tools to students with limited computing background. …
Information Systems Development Projects As Complex Adaptive Systems, Karlheinz Kautz
Information Systems Development Projects As Complex Adaptive Systems, Karlheinz Kautz
Faculty of Engineering and Information Sciences - Papers: Part A
This research considers information systems development (ISD) projects as complex adaptive systems. We investigate the question whether complex adaptive systems (CAS) theory is relevant as a theoretical foundation for understanding ISD, and if so, which kind of understanding can be achieved by utilizing the theory? We introduce key concepts of CAS theory such as interaction, emergence, interconnected autonomous agents, selforganization, co-evolution, poise at the edge of chaos, time pacing, and poise at the edge of time to analyse and understand ISD in practice. We demonstrate the strength of such a CAS approach through an empirical case study presentation and analysis. …
Ethics In Engineering: Student Perceptions And Their Professional Identity Development, Brad Stappenbelt
Ethics In Engineering: Student Perceptions And Their Professional Identity Development, Brad Stappenbelt
Faculty of Engineering and Information Sciences - Papers: Part A
Professional ethics instruction in engineering is commonly conducted by examining case studies in light of the code of conduct of a suitable professional body. Although graphical presentations of spectacular failures, sobering stories of the repercussions and the solid framework provided by the tenets of a code of ethics may leave a lasting impression, students generally gain their professional identity from relatives and colleagues. Their professional ethics tend to be mostly an extension of their personal ethics. Instruction on ethics generally serves only to reinforce students' inclination to act ethically and provides encouragement to act on these beliefs. In this study …
An Inventory Of Landslides Within The Sydney Basin To Aid The Development Of A Refined Susceptibility Zoning, Phillip N. Flentje, David Stirling, Darshika Palamakumbure
An Inventory Of Landslides Within The Sydney Basin To Aid The Development Of A Refined Susceptibility Zoning, Phillip N. Flentje, David Stirling, Darshika Palamakumbure
Faculty of Engineering and Information Sciences - Papers: Part A
The University of Wollongong GIS-based Landslide Inventory is currently being expanded from its Illawarra centric coverage (664 landslides) to include the 31,000km2 geological extent of the Sydney Basin and ultimately all of New South Wales (hereafter this inventory will be referred to as the NSW LI). In 1998, this inventory stood at 319 sites of instability and in 2010 it had grown to 616 landslides. The population of the Sydney Basin in 2006 was approximately 4.9 million people, representing approximately one quarter of the population of Australia. When this current phase of expansion is completed, the NSW LI will include …
Microstructure Development And Alloying Elements Diffusion During Sintering Of Near-Beta Titanium Alloys, Elena Pereloma, Dmytro Savvakin, Andrew Carman, Azdiar Gazder, Orest Ivasishin
Microstructure Development And Alloying Elements Diffusion During Sintering Of Near-Beta Titanium Alloys, Elena Pereloma, Dmytro Savvakin, Andrew Carman, Azdiar Gazder, Orest Ivasishin
Faculty of Engineering - Papers (Archive)
Two near-beta alloys, Ti-5Al-5Mo-5V-2Cr-1Fe and Ti-10V-3Fe-3Al, were produced by the blended element powder metallurgy technique. The use of (i) elemental powders with the Al-V master alloy in the case of Ti-5Al-5Mo-5V-2Cr-1 Fe and, (ii) the complex Al-Fe-V master alloy in Ti-10V-3Fe-3Al has highlighted the influence of different alloying elements and their combination on microstructure evolution and chemical homogenisation. While Fe has the fastest diffusivity in Ti and its addition improves the density of both sintered alloys it also results in accelerated rates of grain coarsening. The combination of Al and V in the master alloy powder inhibits the diffusion of …
Strength Development In Blended Cement Admixed Saline Clay, Suksun Horpibulsuk, Worawit Phojan, Apichat Suddeepong, Avirut Chinkulkijniwat, Martin D. Liu
Strength Development In Blended Cement Admixed Saline Clay, Suksun Horpibulsuk, Worawit Phojan, Apichat Suddeepong, Avirut Chinkulkijniwat, Martin D. Liu
Faculty of Engineering - Papers (Archive)
Cement stabilization is extensively used to improve engineering properties of soft saline clays. The effect of salinity, which is modified by geological and climate changes, on the strength development in cement admixed saline clay is investigated in this paper. For a particular curing time and salt content, the strength development in saline clay admixed with cement is governed by the clay-water/cement ratio, wc/C. The strength increases with the decrease of wc/C. The increase in salt content for a particular water content decreases the inter-particle attraction of the clay and the cementation bond strength. Hence, for the same clay-water/cement ratio, the …
Characterising Compacted Fills At Penrith Lakes Development Site Using Shear Wave Velocity And Matric Suction, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn, R Golaszewski
Characterising Compacted Fills At Penrith Lakes Development Site Using Shear Wave Velocity And Matric Suction, Ana Heitor, Buddhima Indraratna, Cholachat Rujikiatkamjorn, R Golaszewski
Faculty of Engineering - Papers (Archive)
Conventional quality control of compaction during construction is currently based on an in-situ determination of dry unit weight and moisture content via nuclear procedures, but because this is a localised procedure, poor compaction can often occur. Moreover, with older compacted embankments where few or no records of the control done during construction are available, there is no existing methodology that can help practising engineers assess their post-construction condition. This means that the scope of the nuclear method renders it as inadequate and alternative methods should be considered. The use of shear wave velocity (Vs) surveys (i.e. MASW) to assess the …
Development Of Sipm-Based Scintillator Tile Detectors For A Multi-Layer Fast Neutron Tracker, R Preston, J Jakubek, D Prokopovich, J Uher
Development Of Sipm-Based Scintillator Tile Detectors For A Multi-Layer Fast Neutron Tracker, R Preston, J Jakubek, D Prokopovich, J Uher
Faculty of Engineering and Information Sciences - Papers: Part A
We are developing thin tile scintillator detectors with silicon photomultiplier (SiPM) readout for use in a multi-layer fast-neutron tracker. The tracker is based on interleaved Timepix and plastic scintillator layers. The thin 15 x 15 x 2 mm plastic scintillators require suitable optical readout in order to detect and measure the energy lost by energetic protons that have been recoiled by fast neutrons. Our first prototype used dual SiPMs, coupled to opposite edges of the scintillator tile using light-guides. An alternative readout geometry was designed in an effort to increase the fraction of scintillation light detected by the SiPMs. The …
Mechanics Of Design And Model Development Of Cvc-Plus Roll Curve, Jianzhong Xu, Dianyao Gong, Zhengyi Jiang, Xianghua Liu, Guodong Wang
Mechanics Of Design And Model Development Of Cvc-Plus Roll Curve, Jianzhong Xu, Dianyao Gong, Zhengyi Jiang, Xianghua Liu, Guodong Wang
Faculty of Engineering and Information Sciences - Papers: Part A
The mathematic model of CVC-Plus work roll curve is built. The ratio of the initial shifting value to the target crown is determined, and the mathematical model considering the relationship between the coefficients A2, A3, A4, A5 and is established. According to the theoretical analysis, the distance between the maximum or minimum point of the high order equivalent crown for work roll with CVC-plus roll curve and the rolling central point is the times of the roll barrel length. In general, the initial shifting value of the CVC-plus roll curve is not equal to the initial shifting value of the …
An Ontology Development Methodology To Integrate Existing Ontologies In An Ontology Development Process, Nelson K. Y Leung, Sim Kim Lau, Nicole Tsang
An Ontology Development Methodology To Integrate Existing Ontologies In An Ontology Development Process, Nelson K. Y Leung, Sim Kim Lau, Nicole Tsang
Faculty of Engineering and Information Sciences - Papers: Part A
Ontology is defmed as an explicit specification of a conceptualization while a conceptualization is an abstract, simplified view of the world that we wish to represent for some purpose. To build high quality ontologies, developers are required to choose and follow a suitable ontology development methodology in which containing a series of steps, activities and guidelines that are put together in an organized and systematic manner. Literatures show that building ontologies by reusing existing ontologies is more cost effective than building from scratch. However, majority of the methodologies only provide a very limited discussion about how to perform integration or …
Development And Validation Of A Concept Inventory For Introductory-Level Climate Change Science, Lorna Jarrett, Brian Ferry, George Takacs
Development And Validation Of A Concept Inventory For Introductory-Level Climate Change Science, Lorna Jarrett, Brian Ferry, George Takacs
Faculty of Engineering and Information Sciences - Papers: Part A
This paper follows on from Jarrett, Takacs and Ferry (2011) which reported the first stage in development of a high school level concept inventory (CI) for the science of climate change: the climate change concept inventory (CCCI). In order to develop a reliable and valid instrument, it is necessary to follow appropriate procedures. This paper details the process of CI item development; reports statistical results of initial field trials and outlines how these will be used to further refine the CCCI. Item difficulty, discrimination, and point biserial coefficient were calculated for each item. Cronbach's alpha and test-retest data were used …