Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Magnetic (15)
- For (12)
- Properties (11)
- Coal (10)
- Effect (9)
-
- Modelling (9)
- System (9)
- Gas (8)
- Performance (8)
- Treatment (8)
- Under (8)
- Analysis (7)
- Concrete (7)
- Effects (7)
- Removal (7)
- Temperature (7)
- Cyclic (6)
- Graphene (6)
- High (6)
- Soil (6)
- Development (5)
- Influence (5)
- Lithium (5)
- Membrane (5)
- Model (5)
- Oxygen (5)
- Steelmaking (5)
- Surface (5)
- Vertical (5)
- Australian (4)
Articles 1 - 30 of 171
Full-Text Articles in Entire DC Network
Sorption Of Pesticide Endosulfan By Electrodialysis Membranes, Laura Banasiak, Bart Van Der Bruggen, Andrea Schafer
Sorption Of Pesticide Endosulfan By Electrodialysis Membranes, Laura Banasiak, Bart Van Der Bruggen, Andrea Schafer
Faculty of Engineering - Papers (Archive)
Endosulfan (ES) is a micropollutant found in reverse osmosis concentrates from water reuse applications. Electrodialysis (ED) can remove and recover charged solutes from such concentrates. While polar compounds cannot normally be removed, their fate in ED is important as they can contribute to membrane fouling/poisoning and be released during cleaning. High adsorption of ES to ED membranes was observed. Consequently, the influence of solution pH and presence of humic acid (HA) on sorption mechanisms of ES to ion-exchange membranes during batch sorption isotherm and ED experiments were investigated systematically. ES-membrane partition coefficients (log KAEM/CEM) quantified through sorption isotherm experiments suggested …
A Numerical Study To Evaluate Dynamic Responses Of Voided Concrete Railway Sleepers To Impact Loading, Sakdirat Kaewunruen, Alexander Remennikov, Akira Aikawa
A Numerical Study To Evaluate Dynamic Responses Of Voided Concrete Railway Sleepers To Impact Loading, Sakdirat Kaewunruen, Alexander Remennikov, Akira Aikawa
Faculty of Engineering - Papers (Archive)
The prestressed concrete railway sleepers (or railroad ties), which are installed in railway track systems as the crosstie beam support, are designed to carry and transfer the wheel loads from the rails to the ground. It is well known that railway tracks are subject to impact loading conditions, which are attributable to the train operations with either wheel or rail abnormalities such as flat wheels, dipped rails, etc. These loads are of very high magnitude but short duration. In many cases, it has been reported from the fields that concrete sleepers are lacking of support due to mud pumping or …
Comprehensive Model Of Oxygen Steelmaking Part 3: Decarburization In Impact Zone, Neslihan Dogan, Geoffrey A. Brooks, Akbar Rhamdhani
Comprehensive Model Of Oxygen Steelmaking Part 3: Decarburization In Impact Zone, Neslihan Dogan, Geoffrey A. Brooks, Akbar Rhamdhani
Faculty of Engineering - Papers (Archive)
The development of a global model for oxygen steelmaking and its validation against industrial data has been reported in Part 1 of this paper. Part 2 of this paper explained the model development of decarburization reaction of emulsified droplets and discussed the effects of bloating behaviour of metal droplets on the overall kinetics of the process. Part 3 of this paper focussed on the development of one sub-model on the decarburization reaction in the impact zone and critically evaluates the important process variables affecting the decarburization kinetics. Decarburization rates in the impact zone were calculated using the semi-empirical relationships developed …
The Role Of Brookite In Mechanical Activation Of Anatase-To-Rutile Transformation Of Nanocrystalline Tio2: An Xrd And Raman Spectroscopy Investigation, Masih Rezaee, Seyyed Khoie, Hua-Kun Liu
The Role Of Brookite In Mechanical Activation Of Anatase-To-Rutile Transformation Of Nanocrystalline Tio2: An Xrd And Raman Spectroscopy Investigation, Masih Rezaee, Seyyed Khoie, Hua-Kun Liu
Faculty of Engineering - Papers (Archive)
The mechanism of phase transformation in nanocrystalline TiO2 powders at ambient temperature during high energy ball milling and the role of brookite phase in anatase-to-rutile phase transformation were investigated by the use of Rietveld analysis of X-ray diffraction patterns and Raman spectroscopy methods. The milling process was performed on a fully anatase phase nanocrystalline TiO2 powder via a high energy planetary ball mill with different ball-to-powder weight ratios followed by annealing of the as-milled samples. Some transformation from anatase-to-brookite was observed in all as-milled powders by high resolution transmission electron microscopy. It was proposed that brookite occurs at …
Determining The Ultimate Strength Of 'Tough Skin', A Glass Fibre Reinforced Polymer Liner, Jan Anton Nemcik, Ian Porter, Ernest Y. Baafi, Jeffery Navin
Determining The Ultimate Strength Of 'Tough Skin', A Glass Fibre Reinforced Polymer Liner, Jan Anton Nemcik, Ian Porter, Ernest Y. Baafi, Jeffery Navin
Faculty of Engineering - Papers (Archive)
Fully encapsulated roof bolts have been proven to confine the roof and rib strata actively, while steel mesh only provides passive support and protection from falling rocks as they dislodge from the roof. To provide better stability of the mine roadway skin, replacement of the steel mesh with a spray on polymer liner is being investigated. Among the many benefits that may be realised by the application of quick setting spray on polymer liners as skin support are an increase in development rates and improved safety for working personnel. Extensive testing of a range of available polymer formulations is currently …
Efficient Utilisation Of Coal By Integrating Various Industries, Guangqing Zhang
Efficient Utilisation Of Coal By Integrating Various Industries, Guangqing Zhang
Faculty of Engineering - Papers (Archive)
Natural gas, petroleum and coal are hydrocarbons with significantly different molecular weights and hydrogen to carbon ratios. Among the three conventional fossil fuels, coal is the most abundant and the cheapest, while petroleum is a most desirable fuel resource because it is easily processed into valuable petroleum products, especially gasoline and diesel. How to utilise coal resources, especially as a replacement of petroleum, is an important topic.
Let's Talk Terahertz!, R A. Lewis
Let's Talk Terahertz!, R A. Lewis
Faculty of Engineering - Papers (Archive)
Letter to the editor of the American Journal of Physics.
Multifunctionality From Coexistence Of Large Magnetoresistance And Magnetocaloric Effect In La0.7ca0.3mno3, J. C. Debnath, R. Zeng, J. H. Kim, S. X. Dou
Multifunctionality From Coexistence Of Large Magnetoresistance And Magnetocaloric Effect In La0.7ca0.3mno3, J. C. Debnath, R. Zeng, J. H. Kim, S. X. Dou
Faculty of Engineering - Papers (Archive)
We report the existence of multifunctionality involving large magnetoresistance (MR) and magnetocaloric effect (MCE) near room temperature in La0.7Ca0.3MnO3. A peak in the temperature dependence of the magnetoresistance and a change in the magnetic entropy (ΔSM) are observed at 251 K, with a maximum magnetoresistance MR (defined as ρ(0)∕ρ(H)−1) of about 206% and a maximum ΔSM of approximately 7.54 J∕kgK, at a field of 5 T, where the Curie temperature (TC) and metal‐insulator transition coexist at 251 K. The magnetic entropy change is measured on the basis of resistive …
Effect Of Ti And N Concentrations On Microstructure And Mechanical Properties Of Microalloyed High Strength Line Pipe Steel Welds, Leigh Fletcher, Zhixiong Zhu, Marimuthu Murugananth, Lei Zheng, Mingzhuo Bai, Huijun Li, F Barbaro
Effect Of Ti And N Concentrations On Microstructure And Mechanical Properties Of Microalloyed High Strength Line Pipe Steel Welds, Leigh Fletcher, Zhixiong Zhu, Marimuthu Murugananth, Lei Zheng, Mingzhuo Bai, Huijun Li, F Barbaro
Faculty of Engineering - Papers (Archive)
A selection of nine heats of line pipe steel from the same project with different Ti and N content were used to evaluate the effects of Ti/N ratio on weld zone microstructure, hardness and prior austenite grain size (PAGS) in the coarse grained heat-affected zone (CGHAZ). It was shown that the microstructure of the base metal (BM) mainly consisted of fine grained polygonal ferrite with fine islands of pearlite. The weld metal (WM) microstructure was predominantly acicular ferrite with a small volume fraction of pro-eutectoid ferrite. The CGHAZ consisted of bainitic ferrite and islands of martensite-austenite. The inside region of …
Organic Solar Cells: Evaluation Of The Stability Of P3ht Using Time-Delayed Degradation, Chung-How Poh, Chung-Kiak Poh, Glenn Bryant, Warwick Belcher, Paul Dastoor
Organic Solar Cells: Evaluation Of The Stability Of P3ht Using Time-Delayed Degradation, Chung-How Poh, Chung-Kiak Poh, Glenn Bryant, Warwick Belcher, Paul Dastoor
Faculty of Engineering - Papers (Archive)
Despite the fact that the performance of organic solar cells is generally susceptible to degradation by moisture exposure, there has been suggestion that the photoactive layer (P3HT) is surprisingly resilient. This work attempts to confirm the stability of P3HT as an organic solar cell material by deliberately introducing water into the photoactive layer. A dramatic step drop in device performance during cell characterization is observed approximately one day after the device has been fabricated. The time-delayed step drop in output efficiency strongly suggests that moisture has little effect on the P3HT conducting polymer.
Modelling Net Zero Energy Options For A Sustainable Buildings Research Centre, Paul Cooper, Xiong Liu, Prabuono Buyung Kosasih, Rui Yan
Modelling Net Zero Energy Options For A Sustainable Buildings Research Centre, Paul Cooper, Xiong Liu, Prabuono Buyung Kosasih, Rui Yan
Faculty of Engineering - Papers (Archive)
This paper describes the preliminary design and energy analysis of a university research building in NSW, Australia. This case study highlights some of the challenges confronting those wishing to design cost-effective net zero energy buildings in the Australian higher education sector and beyond. The Sustainable Buildings Research Centre (SBRC) is presently under development at the University of Wollongong and will be a unique building in the local region and an exemplar in respect of demonstration of a range of technical and operational means of reducing greenhouse emissions and other ecological impacts. This paper provides details on the constraints and opportunities …
Landslide Susceptibility And Landslide Hazard Zoning In Wollongong, Phillip Flentje, David Stirling, Daniel Palamara, Robin Chowdhury
Landslide Susceptibility And Landslide Hazard Zoning In Wollongong, Phillip Flentje, David Stirling, Daniel Palamara, Robin Chowdhury
Faculty of Engineering - Papers (Archive)
This paper describes 'knowledge-based' data-mining techniques, developed for the assessment of landslide susceptibility and hazard with particular reference to its application in the Wollongong area. Large scale maps of geology and a comprehensive Landslide Inventory with regional coverage have been prepared. GIS-based derivatives of the digital elevation model including slope, geomorphology, curvature, flow accumulation and wetness index have been developed. Model performance has been assessed as part of a refined methodology for validation, including field inspections. Susceptibility zones outside known landslide areas have been classified as (a) high (b) moderate, (c) low and (d) very low susceptibility. Results show the …
Simulation Of Water And Contaminant Transport Through Vadose Zone - Redistribution System, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Simulation Of Water And Contaminant Transport Through Vadose Zone - Redistribution System, Thidarat Bunsri, Muttucumaru Sivakumar, Dharmappa Hagare
Faculty of Engineering - Papers (Archive)
Movement of water in vadose zone, mainly focusing on infiltration and percolation that involves percolation of water under gravity from soil surface and redistribution which is the capillary rise of water movement upwards, is presented. In the global hydrologic cycle, 76% of the precipitating water enters the soil via percolation-infiltration, which leads to the downward movement of water (L’vovich 1974). The water used by natural processes, can move downwards due to infiltration and lift from groundwater table during natural redistribution process. The forecasting of water movement in unsaturated infiltration redistribution system is linked between soil hydraulic properties and hydrologic condition …
Background Dose For Systemic Targeted Alpha Therapy, Chen-Yu Huang, Susanna Guatelli, Bradley Oborn, Barry J. Allen
Background Dose For Systemic Targeted Alpha Therapy, Chen-Yu Huang, Susanna Guatelli, Bradley Oborn, Barry J. Allen
Faculty of Engineering - Papers (Archive)
The phase 1 clinical trial of systemic Targeted Alpha Therapy for metastatic melanoma has shown that solid tumours can be regressed by alpha radiation. However, patient blood vessels and lymphocytes inevitably received a background radiation from non-targeted alpha decays in the blood circulation. To determine the toxicity of alpha particle to normal tissue capillaries and peripheral blood lymphocytes, capillary and lymphocyte models were established with Geant4 Monte Carlo microdosimetry technique. The specific energy deposited in a capillary endothelial cell nucleus or lymphocyte nucleus per radioactive decay and the cell survival rates were calculated for the source constrained in the vessel. …
A Change Analysis Tool For Service-Based Business Processes, Yi Wang, Jian Yang, Weiliang Zhao
A Change Analysis Tool For Service-Based Business Processes, Yi Wang, Jian Yang, Weiliang Zhao
Faculty of Engineering - Papers (Archive)
Change management is critical and challenging in the context of service-oriented computing paradigm when multiple services are supported by a single business process [1]. The complex dependencies between services and business processes have not been carefully investigated in the existing work. In particular, it is still lacking of an effective tool to support change impact analysis for coupled services and business processes. In this demo, we present a tool: Service Change Analyzer (SCA) for enabling impact analysis when a change happens. The SCA is built up based on our previous work for change analysis, in which a service-oriented business process …
Soac Engine: A System To Manage Composite Web Service Authorization, Haiyang Sun, Weiliang Zhao, Jian Yang, Guizhi Shi
Soac Engine: A System To Manage Composite Web Service Authorization, Haiyang Sun, Weiliang Zhao, Jian Yang, Guizhi Shi
Faculty of Engineering - Papers (Archive)
The authorization of composite web services is different from traditional authorization in a close system due to the dynamic and complex relationships among service consumers and resources (component services). This demonstration is to show the functionality of a system named Service Oriented Authorization Control Engine (SOAC Engine).
Geo-Environmental Approaches For The Remediation Of Acid Sulphate Soil In Low-Lying Floodplains, Buddhima Indraratna, Gyanendra Regmi, Long Nghiem, Alexandra N. Golab
Geo-Environmental Approaches For The Remediation Of Acid Sulphate Soil In Low-Lying Floodplains, Buddhima Indraratna, Gyanendra Regmi, Long Nghiem, Alexandra N. Golab
Faculty of Engineering - Papers (Archive)
Acidity generated from the oxidation of pyrite and other sulphidic compounds that exist at shallow depths in acid sulphate soils (ASS) presents a challenging environmental problem in coastal Australia. The generated acidic groundwater can adversely impact coastal ecosystems, aquaculture and agriculture. Groundwater manipulation using weirs and modified floodgates in creeks and flood mitigation drains in ASS-affected farmland, which has been practiced for over a decade for preventing pyrite oxidation, is not effective in low-lying floodplains due to the high risk of flooding. In this paper, the authors present an overview of their experience in coastal Australia, a critical evaluation of …
Consolidation Of Ground With Partially Penetrated Pvds Combined With Vacuum Preloading, Xueyu Geng, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Consolidation Of Ground With Partially Penetrated Pvds Combined With Vacuum Preloading, Xueyu Geng, Buddhima Indraratna, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
Partially penetrating prefabricated vertical drain (PVDs) with a combined surcharge and vacuum preloading are considered in this paper. The analysis results can be used in cases where the soft soil clay is too deep and not economical to be penetrated to full depth, or the surcharge preloading is too small to justify full penetration of soft clay layer or the vacuum pressure can be lost, which is caused by the permeability of the bottom of the clay for the fully penetrated drain etc.. In this model, a virtual vertical drain is assumed to reflect the real three-dimensional seepage in the …
Non-Destructive Assessment Of Rail Track Condition Using Ground Penetrating Radar, L J. Su, Buddhima Indraratna, C Rujikiatkamjorn
Non-Destructive Assessment Of Rail Track Condition Using Ground Penetrating Radar, L J. Su, Buddhima Indraratna, C Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
Ground penetrating radar (GPR) can be used to locate interfaces and underground utilities, and evaluate ballast fouling conditions, moisture content and subgrade conditions depending on frequencies of antenna and data processing techniques. In Australia, trial testing on railway sections has been conducted by the railway industry. However, in these trials, testing is only conducted on actual tracks where the relationship between track conditions and the GPR response has not yet been established. In this paper, a full scale model rail track designed and constructed at the University of Wollongong is used to investigate factors that infl uence the GPR data …
Development Of Sediment-Infilled Rock Joint Models And Implications On Rockmass Stability, Buddhima Indraratna, Wuditha N. Premadasa, David Oliveira, H S. Welideniya
Development Of Sediment-Infilled Rock Joint Models And Implications On Rockmass Stability, Buddhima Indraratna, Wuditha N. Premadasa, David Oliveira, H S. Welideniya
Faculty of Engineering - Papers (Archive)
Soil-infi lled discontinuities adversely infl uence the stability of rockmass, because, the infi ll materials especially when saturated, drastically reduce the shear strength. The angle of shearing resistance of a discontinuity decreases signifi cantly for increasing infi ll thickness. Once it reaches a critical thickness, the shear strength of the discontinuity will be governed only by the infi ll material and the rock-walls effect becomes negligible. Owing to the lack of research on the shear behavior of infi lled rock joints, it has been common practice to assume that the shear strength of the joint is that of the infi …
Treatment Of Acidic Groundwater In Acid Sulfate Soil Terrain Using Recycled Concrete: Column Experiments, Gyanendra Regmi, Buddhima Indraratna, Long Nghiem, A. Golab, B Guru Prasad
Treatment Of Acidic Groundwater In Acid Sulfate Soil Terrain Using Recycled Concrete: Column Experiments, Gyanendra Regmi, Buddhima Indraratna, Long Nghiem, A. Golab, B Guru Prasad
Faculty of Engineering - Papers (Archive)
Acidic groundwater generated from pyrite oxidation in acid sulfate (AS) soil is a major geoenvironmental problem in Australia. This study aims to evaluate recycled concrete as a reactive material in permeable reactive barriers (PRBs) for the remediation of acidic groundwater in low-lying AS soil floodplains. Laboratory experiments were systematically conducted to investigate the acid neutralization behavior of recycled concrete and its potential to remove dissolved Al and Fe. The results confirmed that recycled concrete could effectively treat acidic groundwater from an AS soil terrain, resulting in near neutral effluent over a long period with complete removal of Al and Fe. …
Performance And Prediction Of Vacuum Combined Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Xueyu Geng, Jayantha Ameratunga, Peter Boyle
Performance And Prediction Of Vacuum Combined Surcharge Consolidation At Port Of Brisbane, Buddhima Indraratna, Cholachat Rujikiatkamjorn, Xueyu Geng, Jayantha Ameratunga, Peter Boyle
Faculty of Engineering - Papers (Archive)
During the past decade, the application of vacuum preloading for stabilising soft coastal clay and other low-lying estuarine soils has become popular in Australia. The cost-effectiveness is a major factor in most projects in view of the significantly reduced time for achieving a relatively high degree of consolidation. Due to an increase in trade activities at the Port of Brisbane, new facilities on Fisherman Islands at the mouth of the Brisbane River will be constructed on the new outer area (235 ha) adjacent to the existing port facilities via land reclamation. A vacuum assisted surcharge load and conventional surcharge scheme …
Stabilisation Of Ballast And Subgrade With Geosynthetic Grids And Drains For Rail Infrastructure, Buddhima Indraratna, Sanjay Nimbalkar, Cholachat Rujikiatkamjorn
Stabilisation Of Ballast And Subgrade With Geosynthetic Grids And Drains For Rail Infrastructure, Buddhima Indraratna, Sanjay Nimbalkar, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
Rail tracks are often placed on ballast that is intended to provide a free draining and sound load bearing platform to ensure track stability and maintain proper alignment. In recent years, the increased demand of heavier and faster trains has posed greater challenges to the railway industry for improving efficiency and track stability while reducing maintenance costs. High traffic induced stresses always result in large plastic deformations and degradation of ballast, which in turn, leads to significant loss of track stability. The deformation and degradation of ballast are influenced by factors such as the amplitude and number of load cycles, …
Removal Of Micropollutants By Membrane Bioreactor Under Temperature Variation, Faisal I. Hai, Karin Tessmer, Luong N. Nguyen, Jinguo Kang, William E. Price, Long Nghiem
Removal Of Micropollutants By Membrane Bioreactor Under Temperature Variation, Faisal I. Hai, Karin Tessmer, Luong N. Nguyen, Jinguo Kang, William E. Price, Long Nghiem
Faculty of Engineering - Papers (Archive)
The effects of controlled temperature variation in the range of 10–45 °C were assessed in a lab-scale MBR that treated synthetic municipal wastewater spiked with selected micropollutants. The effects were evaluated with respect to total organic carbon (TOC) and total nitrogen (TN) removal, micropollutant removal, sludge growth, level of soluble microbial products (SMPs) in the mixed liquor and membrane fouling. Overall, the temperature shifts caused high variation in the TOC and TN levels in the reactor supernatant, however that in membrane-permeate was relatively more stable, substantiating the robustness of the MBR process. Results regarding the removal of micropollutants at ambient …
Surface Dosimetry For Breast Radiotherapy In The Presence Of Immobilization Cast Material, Andrew Kelly, Nicholas Hardcastle, Peter E. Metcalfe, Dean L. Cutajar, Alexandra Quinn, Kerwyn Y. Foo, Michael Cardoso, Sheree Barlin, Anatoly B. Rosenfeld
Surface Dosimetry For Breast Radiotherapy In The Presence Of Immobilization Cast Material, Andrew Kelly, Nicholas Hardcastle, Peter E. Metcalfe, Dean L. Cutajar, Alexandra Quinn, Kerwyn Y. Foo, Michael Cardoso, Sheree Barlin, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
Curative breast radiotherapy typically leaves patients with varying degrees of cosmetic damage. One problem interfering with cosmetically acceptable breast radiotherapy is the external contour for large pendulous breasts which often results in high doses to skin folds. Thermoplastic casts are often employed to secure the breasts to maintain setup reproducibility and limit the presence of skin folds. This paper aims to determine changes in surface dose that can be attributed to the use of thermoplastic immobilization casts. Skin dose for a clinical hybrid conformal/IMRT breast plan was measured using radiochromic film and MOSFET detectors at a range ofwater equivalent depths …
Flow Of Liquid Slag Through Coke Channels, Hazem F. Labib, Brian J. Monaghan, Raymond Longbottom, S J. Chew, Peter R. Austin
Flow Of Liquid Slag Through Coke Channels, Hazem F. Labib, Brian J. Monaghan, Raymond Longbottom, S J. Chew, Peter R. Austin
Faculty of Engineering - Papers (Archive)
The blast furnace is the primary liquid iron production unit for the majority of the world’s steel. At present, our knowledge of the blast furnace does not extend to a full description of the material flow, chemistry and internal physical structure of the furnace. This is due to the highly complex inter-dependent thermal, physical and chemical phenomena within the furnace, and to limited access to the furnace to observe important phenomena directly. This study is focused on developing an improved understanding of liquid flows in the lower zone of the blast furnace. To this end, two experimental methods have been …
Magnetic Properties In Polycrystalline And Single Crystal Ca-Doped Lacoo3, R Zeng, J C. Debnath, Dapeng Chen, P Shamba, Jianli Wang, S J. Kennedy, S J. Campbell, Tania M. Silver, S. X. Dou
Magnetic Properties In Polycrystalline And Single Crystal Ca-Doped Lacoo3, R Zeng, J C. Debnath, Dapeng Chen, P Shamba, Jianli Wang, S J. Kennedy, S J. Campbell, Tania M. Silver, S. X. Dou
Faculty of Engineering - Papers (Archive)
Polycrystalline (PC) and single crystalline (SC) Ca-doped LaCoO3 (LCCO) samples with the perovskite structure were synthesized by conventional solid-state reaction and the floating-zone growth method. We present the results of a comprehensive investigation of the magnetic properties of the LCCO system. Systematic measurements have been conducted on dc magnetization, ac susceptibility, exchange-bias, and the magnetocaloric effect. These findings suggest that complex structural phases, ferromagnetic (FM), and spin-glass/cluster-spin-glass (CSG), and their transitions exist in PC samples, while there is a much simpler magnetic phase in SC samples. It was also of interest to discover that the CSG induced a magnetic …
The Effect Of Sulfur Concentration In Liquid Iron On Mineral Layer Formation During Coke Dissolution, Michael W. Chapman, Brian J. Monaghan, Sharon Nightingale, John G. Mathieson, Robert J. Nightingale
The Effect Of Sulfur Concentration In Liquid Iron On Mineral Layer Formation During Coke Dissolution, Michael W. Chapman, Brian J. Monaghan, Sharon Nightingale, John G. Mathieson, Robert J. Nightingale
Faculty of Engineering - Papers (Archive)
The effects of sulfur concentration in liquid iron on mineral layer development between coke and iron as coke dissolves in a 2 mass % carbon-iron liquid have been investigated at 1500°C. Initial sulfur in iron concentrations used ranged from 0.006 to 0.049 mass %. Key findings include that the two stage dissolution behavior exhibited in the carbon transfer from coke to iron as reported in a previous study by the authors, at low initial sulfur in iron contents, was also apparent at the higher values used in this study. This two stage behavior was attributed to a change in the …
Structural, Dielectric, Antiferromagnetic, And Thermal Properties Of The Frustrated Hexagonal Ho1-Xerxmno3 Manganites, Peng Liu, Xiaolin Wang, Zhenxiang Cheng, Yi Du, Hideo Kimura
Structural, Dielectric, Antiferromagnetic, And Thermal Properties Of The Frustrated Hexagonal Ho1-Xerxmno3 Manganites, Peng Liu, Xiaolin Wang, Zhenxiang Cheng, Yi Du, Hideo Kimura
Faculty of Engineering - Papers (Archive)
The Er doping effects on the structural, dielectric, ferroelectric, magnetic, and thermal properties of the hexagonal Ho1-xErxMnO3 (0 ≤ x ≤ 1) compounds synthesized by the solid-state reaction method have been investigated by Rietveld refinement and by measurements of dielectric constant, ferroelectric hysteresis loops, magnetic susceptibility, and specific heat. The a lattice parameter decreases as the Er content increases, whereas the c lattice parameter nearly keeps constant with pretty minor fluctuations. Dielectric data and ferroelectric hysteresis loops show all the samples are not only ferroelectric materials with leaky nature, but also with dielectric relaxation related …
Upper Critical Field And Thermally Activated Flux Flow In Lafeaso1-Xfx, Mahboobeh Shahbazi, Xiaolin Wang, C Shekhar, O N. Srivastava, Z W. Lin, J G. Zhu, S. X. Dou
Upper Critical Field And Thermally Activated Flux Flow In Lafeaso1-Xfx, Mahboobeh Shahbazi, Xiaolin Wang, C Shekhar, O N. Srivastava, Z W. Lin, J G. Zhu, S. X. Dou
Faculty of Engineering - Papers (Archive)
The magneto-resistance, critical current density, Jc, upper critical field, Hc2, and flux pinning properties of LaFeAsO1−xFx superconductors were investigated systematically by magnetic and magneto-transport measurements in the fields up to 13 T over a temperature range of 5–35 K. It was found that the Hc2 increased with increasing fluorine concentration up to x ≤ 0.15, while with higher fluorine doping, Hc2 decreased. A peak effect in the Jc as a function of field was observed at T Uo, scales as Uo/kB ∝ B …