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The Social And Behavioral Implications Of Location-Based Services, Katina Michael, M.G. Michael
The Social And Behavioral Implications Of Location-Based Services, Katina Michael, M.G. Michael
Associate Professor Katina Michael
The social and behavioral implications of location-based services (LBS) are only now beginning to come to light in advanced markets where the services have been adopted by just a little over half the market (Microsoft 2011). Depending on one’s definition of what constitutes location-based services, statistics on the level of adoption differ considerably. While it is helpful to provide as broad a list of applications as possible in what constitutes LBS (e.g. everything from in-vehicle navigation systems to downloading a map using a computer), it can also cloud the real picture forming behind this emerging technology. Emerging not in the …
Practical Reliability Approach To Urban Slope Stability, R. Chowdhury, P. Flentje
Practical Reliability Approach To Urban Slope Stability, R. Chowdhury, P. Flentje
Faculty of Engineering - Papers (Archive)
Assessing urban slope stability requires consideration of significant uncertainties including those associated with shear strength and pore water pressure. For site-specific studies, there is considerable merit in adopting a reliability approach within a probabilistic framework based on widely accepted geotechnical models. Regional slope stability studies are facilitated by using a GIS-based approach. Considerable effort is required to prepare regional data sets including topography and geology and to develop a landslide inventory. Reference is made to a comprehensive knowledge-based approach for assessing failure susceptibility and hazard within an urban region in Australia. Each hazard zone is associated with an estimated likelihood …
Bulk And Surface Field-Induced Optical Rectification From (11n) Zincblende Crystals In A Quasireflection Geometry, Krunal Radhanpura, Stuart Hargreaves, Roger A. Lewis
Bulk And Surface Field-Induced Optical Rectification From (11n) Zincblende Crystals In A Quasireflection Geometry, Krunal Radhanpura, Stuart Hargreaves, Roger A. Lewis
Faculty of Engineering - Papers (Archive)
IIn a previous article, we presented a generalized expression for second-order bulk and third-order surface-field–induced optical rectification for zincblende 4̅ 3m crystal faces with arbitrary Miller indices (hkl) along with experimental data for (11N)A and (11N)B GaAs in transmission geometry. We now expand the results to quasireflection geometry, with angles of incidence and detection of 45°. While this geometry introduces a p-polarized signal component due to mechanisms other than optical rectification, such as photocarrier acceleration by the surface depletion field, the azimuthal angle dependence of the optical rectification component yields further insight into the crystallographic orientation and surface …
Bioaugmented Membrane Bioreactor (Mbr) With A Gac-Packed Zone For High Rate Textile Wastewater Treatment, Faisal Ibney Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi
Bioaugmented Membrane Bioreactor (Mbr) With A Gac-Packed Zone For High Rate Textile Wastewater Treatment, Faisal Ibney Hai, Kazuo Yamamoto, Fumiyuki Nakajima, Kensuke Fukushi
Faculty of Engineering - Papers (Archive)
The long-term performance of a bioaugmented membrane bioreactor (MBR) containing a GAC3 packed anaerobic zone for treatment of textile wastewater containing structurally different azo dyes was observed. A unique feeding strategy, consistent with the mode of evolution of separate waste streams in textile plants, was adopted to make the best use of the GAC-zone for dye removal. Dye was introduced through the GAC-zone while the rest of the colorless media was simultaneously fed through the aerobic zone. Preliminary experiments confirmed the importance of coupling the GAC amended anaerobic zone to the aerobic MBR and also evidenced the efficacy of the …
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 …
Anicap: An Animated 3d Captcha Scheme Based On Motion Parallax, Yang-Wai Chow, Willy Susilo
Anicap: An Animated 3d Captcha Scheme Based On Motion Parallax, Yang-Wai Chow, Willy Susilo
Faculty of Engineering - Papers (Archive)
CAPTCHAs are essentially challenge-response tests that are used to distinguish whether a user is a human or a computer. To date, numerous CAPTCHA schemes have been proposed and deployed on various websites to secure online services from abuse by automated programs. However, many of these CAPTCHAs have been found to suffer from design flaws that can be exploited to break the CAPTCHA. Hence, the development of a good CAPTCHA scheme that is both secure and human usable is an important research problem. This paper addresses this problem by presenting AniCAP, a new animated 3D CAPTCHA scheme that is designed to …
Subgap Optical Conductivity In Semihydrogenated Graphene, Yee Sin Ang, Chao Zhang
Subgap Optical Conductivity In Semihydrogenated Graphene, Yee Sin Ang, Chao Zhang
Faculty of Engineering - Papers (Archive)
We report that for graphene with a finite band gap (such as semihydrogenated graphene or graphene with spin-orbit coupling), there exists a strong nonlinear optical response for energies lower than the band gap where the linear response is forbidden. At low temperatures, the nonlinear current in graphene with a gap is much stronger than that in gapless graphene. Our result suggests that semihydrogenated graphene can have a unique potential as a two-color nonlinear material in the terahertz frequency region. The relative intensity of the two colors can be tuned with the electric field.
Stacked-And-Drawn Metamaterials With Magnetic Resonances In The Terahertz Range, Alessandro Tuniz, Richard Lwin, Alex Argyros, Simon Fleming, Elise Pogson, Evan Constable, R. A. Lewis, Boris Kuhlmey
Stacked-And-Drawn Metamaterials With Magnetic Resonances In The Terahertz Range, Alessandro Tuniz, Richard Lwin, Alex Argyros, Simon Fleming, Elise Pogson, Evan Constable, R. A. Lewis, Boris Kuhlmey
Faculty of Engineering - Papers (Archive)
We present a novel method for producing drawn metamaterials containing slotted metallic cylinder resonators, possessing strong magnetic resonances in the terahertz range. The resulting structures are either spooled to produce a 2-dimensional metamaterial monolayer, or stacked to produce three-dimensional multi-layered metamaterials. We experimentally investigate the effects of the resonator size and number of metamaterial layers on transmittance, observing magnetic resonances between 0.1 and 0.4 THz, in good agreement with simulations. Such fibers promise future applications in mass-produced stacked or woven metamaterials
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 …
Comparison Of Go, Go/Mwcnts Composite And Mwcnts As Potential Electrode Materials For Supercapacitors, Seyed Hamed Aboutalebi, Maryam Salari, Konstantin Konstantinov, David Wexler, Hua-Kun Liu, S. X. Dou
Comparison Of Go, Go/Mwcnts Composite And Mwcnts As Potential Electrode Materials For Supercapacitors, Seyed Hamed Aboutalebi, Maryam Salari, Konstantin Konstantinov, David Wexler, Hua-Kun Liu, S. X. Dou
Faculty of Engineering - Papers (Archive)
We report the synthesis of graphene oxide/multi-walled carbon nanotube (MWCNT) composites employing an alternative and novel approach for possible application as supercapacitor materials in energy storage devices. Integrating these nanostructures resulted in a strong synergistic effect between the two materials consequently leading to a robust and superior hybrid material with higher capacitance compared to either graphene oxide or MWCNTs. Specific capacitances of 251, 85 and 60 F g−1 were obtained for graphene oxide-multi-walled carbon nanotubes, MWCNTs and graphene oxide, respectively, in a potential range from −0.1 to 0.5 V. Most importantly, a 120% increase in capacitance was observed with …
Dynamics And Morphology Of Dendritic Flux Avalanches In Superconducting Films, J. Vestgarden, D. V. Shantsev, Y. Galperin, T H. Johansen
Dynamics And Morphology Of Dendritic Flux Avalanches In Superconducting Films, J. Vestgarden, D. V. Shantsev, Y. Galperin, T H. Johansen
Faculty of Engineering - Papers (Archive)
We develop a fast numerical procedure for the analysis of nonlinear and nonlocal electrodynamics of type-II superconducting films in transverse magnetic fields coupled with heat diffusion. Using this procedure, we explore the stability of such films with respect to dendritic flux avalanches. The calculated flux patterns are very close to experimental magneto-optical images of MgB2 and other superconductors, where the avalanche sizes and their morphology change dramatically with temperature. Moreover, we find the values of a threshold magnetic field, which agrees with both experiments and linear stability analysis. The simulations predict the temperature rise during an avalanche, where for …
Influence Of Temperature On Coal Sorption Characteristics And The Theory Of Coal Surface Free Energy, Lei Zhang, Najdat I. Aziz, Ting Ren, Zhongwei Wang
Influence Of Temperature On Coal Sorption Characteristics And The Theory Of Coal Surface Free Energy, Lei Zhang, Najdat I. Aziz, Ting Ren, Zhongwei Wang
Faculty of Engineering - Papers (Archive)
An experimental study was undertaken to examine the sorption and desorption characteristics of coal at temperatures of 35 °C, 45 °C and 55 °C. The study focused on the effect of changes in temperature and coal particle sizes on gas sorption and desorption characteristics. The coal size used ranged from fragmented coals, 16 mm, 8 mm, 2.4 mm, powdered coal of 150 μm and 54 mm core samples. The samples were tested in pressure vessels, known as “bombs”, charged with CO2 gas at different pressure levels up to a maximum of 4000 kPa. It was found that temperature has a …
Nanoscale Condensation Of Water On Self-Assembled Monolayers, Michael James, Tamim A. Darwish, Simone Ciampi, Sven O. Sylvester, Zhaoming Zhang, Albert Ng, J Justin Gooding, Tracey L. Hanley
Nanoscale Condensation Of Water On Self-Assembled Monolayers, Michael James, Tamim A. Darwish, Simone Ciampi, Sven O. Sylvester, Zhaoming Zhang, Albert Ng, J Justin Gooding, Tracey L. Hanley
Australian Institute for Innovative Materials - Papers
We demonstrate that water is almost universally present on apparently dry self-assembled monolayers, even on those considered almost hydrophobic by conventional methods such as water contact goniometry. The structure and kinetics of nanoscale water adsorption onto these surfaces were investigated using X-ray and neutron reflectometry, as well as atomic force microscopy. Condensation of water on hydrophilic surfaces under ambient conditions formed a dense sub-nanometre surface layer; the thickness of which increased with exponentially limiting kinetics. Tapping mode AFM measurements show the presence of nanosized droplets that covered a small percentage (∼2%) of the total surface area, and which became fewer …
Mesoporous Silicon Photonic Crystal Microparticles: Towards Single-Cell Optical Biosensors, Bin Guan, Astrid I. Magenau, Krisopher A. Kilian, Simone Ciampi, Katharina Gaus, Peter J. Reece, J Justin Gooding
Mesoporous Silicon Photonic Crystal Microparticles: Towards Single-Cell Optical Biosensors, Bin Guan, Astrid I. Magenau, Krisopher A. Kilian, Simone Ciampi, Katharina Gaus, Peter J. Reece, J Justin Gooding
Australian Institute for Innovative Materials - Papers
In this paper we demonstrate the possibility of modifying porous silicon (PSi) particles with surface chemistry and recognition molecules (antibodies) such that these devices could potentially be used for single-cell identification or sensing. This is achieved by modifying PSi Rugate filters via hydrosilylation with surface chemistry that serves firstly, to protect the silicon surfaces from oxidation; secondly, renders the surfaces resistant to nonspecific adsorption of proteins and cells and thirdly, allows further functionality to be added such as the coupling of antibodies. The surface chemistry remained unchanged after sonication of the PSi to form PSi microparticles. The ability to monitor …
Critical Property In Relaxor-Pbtio3 Single Crystals - Shear Piezoelectric Response, Fei Li, Shujun Zhang, Zhuo Xu, Xiaoyong Wei, Thomas R. Shrout
Critical Property In Relaxor-Pbtio3 Single Crystals - Shear Piezoelectric Response, Fei Li, Shujun Zhang, Zhuo Xu, Xiaoyong Wei, Thomas R. Shrout
Australian Institute for Innovative Materials - Papers
The shear piezoelectric behavior in relaxor-PbTiO 3 (PT) single crystals is investigated with regard to the crystal phase. High levels of shear piezoelectric activity, d 15 or d 24 >2000 pC N -1, are observed for single-domain rhombohedral (R), orthorhombic (O), and tetragonal (T) relaxor-PT crystals. The high piezoelectric response is attributed to a flattening of the Gibbs free energy at compositions close to the morphotropic phase boundaries, where polarization rotation is easily accomplished by applying a perpendicular electric field. The shear piezoelectric behavior of perovskite ferroelectric crystals is discussed with respect to ferroelectric-ferroelectric phase transitions and the dc bias …
Direct Observation Of Nodes And Twofold Symmetry In Fese Superconductor, Canli Song, Yi-Lin Wang, Peng Cheng, Yeping Jiang, Wei Li, Tong Zhang, Zhi Li, Ke He, Lili Wang, Jin-Feng Jia, Hsiang-Hsuan Hung, Congjun Wu, Xu-Cun Ma, Xi Chen, Qi-Kun Xue
Direct Observation Of Nodes And Twofold Symmetry In Fese Superconductor, Canli Song, Yi-Lin Wang, Peng Cheng, Yeping Jiang, Wei Li, Tong Zhang, Zhi Li, Ke He, Lili Wang, Jin-Feng Jia, Hsiang-Hsuan Hung, Congjun Wu, Xu-Cun Ma, Xi Chen, Qi-Kun Xue
Australian Institute for Innovative Materials - Papers
We investigated the electron-pairing mechanism in an iron-based superconductor, iron selenide (FeSe), using scanning tunneling microscopy and spectroscopy. Tunneling conductance spectra of stoichiometric FeSe crystalline films in their superconducting state revealed evidence for a gap function with nodal lines. Electron pairing with twofold symmetry was demonstrated by direct imaging of quasiparticle excitations in the vicinity of magnetic vortex cores, Fe adatoms, and Se vacancies. The twofold pairing symmetry was further supported by the observation of striped electronic nanostructures in the slightly Se-doped samples. The anisotropy can be explained in terms of the orbital-dependent reconstruction of electronic structure in FeSe.
In-Field Jc Improvement By Oxygen-Free Pyrene Gas Diffusion Into Highly Dense Mgb2 Superconductor, Minoru Maeda, Jung Ho Kim, Y Zhao, Yoon-Uk Heo, K Takase, Y Kubota, C Moriyoshi, F Yoshida, Y Kuroiwa, S X. Dou
In-Field Jc Improvement By Oxygen-Free Pyrene Gas Diffusion Into Highly Dense Mgb2 Superconductor, Minoru Maeda, Jung Ho Kim, Y Zhao, Yoon-Uk Heo, K Takase, Y Kubota, C Moriyoshi, F Yoshida, Y Kuroiwa, S X. Dou
Australian Institute for Innovative Materials - Papers
Oxygen-free pyrene gas as a carbon (C) dopant was delinked and incorporated into highly dense MgB2 structure via a gas phase diffusion method. The technique offers the advantages that molecular C is homogeneously distributed into MgB2 and substituted at the boron sites without any severe deterioration of grain connectivity. The C substitution causes a significant shrinkage of the a-lattice parameter and an increase in the lattice strain, resulting in high disorder. The introduction of structural disorder as a result of C doping leads to a considerable enhancement of the in-field critical current density (Jc) and upper critical …
Compact-Designed Supercapacitors Using Free-Standing Single-Walled Carbon Nanotube Films, Zhiqiang Niu, Weiya Zhou, Jun Chen, Guoxing Feng, Hong Li, Wenjun Ma, Jinzhu Li, Haibo Dong, Yan Ren, Duan Zhao, Sishen Xie
Compact-Designed Supercapacitors Using Free-Standing Single-Walled Carbon Nanotube Films, Zhiqiang Niu, Weiya Zhou, Jun Chen, Guoxing Feng, Hong Li, Wenjun Ma, Jinzhu Li, Haibo Dong, Yan Ren, Duan Zhao, Sishen Xie
Australian Institute for Innovative Materials - Papers
We reported the realization of assembling compact-designed supercapacitors using large-scaled freestanding and flexible single-walled carbon nanotube (SWCNT) films as both anode and cathode. A prototype of the processing procedures was developed to obtain the uniform spreading of the SWCNT films onto the separators serving as both electrodes and charge collectors without metallic current collectors, leading to a simplified and lightweight architecture. The area of SWCNT film on a separator can be scaled up and its thickness can be extended. High energy and power densities (43.7 Wh kg-1 and 197.3 kW kg-1, respectively) were achieved from the prepared …
Sinteractive Anodic Powders Improve Densification And Electrochemical Properties Of Bazr0.8y0.2o3-O Electrolyte Films For Anode-Supported Solid Oxide Fuel Cells, Lei Bi, Emiliana Fabbri, Ziqi Sun, Enrico Traversa
Sinteractive Anodic Powders Improve Densification And Electrochemical Properties Of Bazr0.8y0.2o3-O Electrolyte Films For Anode-Supported Solid Oxide Fuel Cells, Lei Bi, Emiliana Fabbri, Ziqi Sun, Enrico Traversa
Australian Institute for Innovative Materials - Papers
The difficult sintering of BaZr0.8Y0.2O3-δ(BZY20) powders makes the fabrication of anode-supported BZY20 electrolyte films complex. Dense BZY20 membranes were successfully fabricated on anode substrates made of sinteractive NiO-BZY20 powders, prepared by a combustion method. With respect to traditional anode substrates made of powders prepared by mechanical mixing, the anode substrates made of the wet-chemically synthesized composite NiO–BZY20 powders significantly promoted the densification of BZY20 membranes: dense BZY20 films were obtained after co-pressing and co-firing at 1300°C, a much lower temperature than those usually needed for densifying BZY20 membranes. Improved electrochemical performance was …
Bazr(0.8)Y(0.2)O(3-Delta)-Nio Composite Anodic Powders For Proton-Conducting Sofcs Prepared By A Combustion Method, Lei Bi, Emiliana Fabbri, Ziqi Sun, Enrico Traversa
Bazr(0.8)Y(0.2)O(3-Delta)-Nio Composite Anodic Powders For Proton-Conducting Sofcs Prepared By A Combustion Method, Lei Bi, Emiliana Fabbri, Ziqi Sun, Enrico Traversa
Australian Institute for Innovative Materials - Papers
BaZr0.8Y0.2O3-∂ (BZY)-NiO composite powders with different BZY-NiO weight ratios were prepared by a combustion method as anodes for proton-conducting solid oxide fuel cells (SOFCs). After heating to 1100°C for 6 h, the composite powders were made of a well-dispersed mixture of two phases, BZY and NiO. Chemical stability tests showed that the BZY-NiO anodic powders had good stability against CO2, whereas comparative tests under the same conditions showed degradation for BaCe0.7Zr0.1Y0.2O3-∂- NiO, which is at present the most used anode material for proton-conducting …
Position Preference And Diffusion Path Of An Oxygen Ion In Apatite-Type Lanthanum Silicate La9.33si6o26: A Density Functional Study, Ting Liao, Taizo Sasaki, Shigeru Suehara, Ziqi Sun
Position Preference And Diffusion Path Of An Oxygen Ion In Apatite-Type Lanthanum Silicate La9.33si6o26: A Density Functional Study, Ting Liao, Taizo Sasaki, Shigeru Suehara, Ziqi Sun
Australian Institute for Innovative Materials - Papers
Using density functional theory, we investigated the position preference and diffusion mechanisms of interstitial oxygen ions in lanthanum silicate La9.33Si6O26, which is an apatite-structured oxide and a promising candidate electrolyte material for solid oxide fuel cells. The reported lanthanum vacancies were explicitly taken into account by theoretically determining their arrangement with a supercell model. The most stable structures and the formation energies of oxygen interstitials were determined for each charged state. It was found that the double-negatively charged state is stable over a wide range of the Fermi level, and that the excess oxygen …
Domain Wall Conductivity In Oxygen Deficient Multiferroic Ymno3 Single Crystals, Yi Du, Xiaolin Wang, Dapeng Chen, S X. Dou, Z. Cheng, Michael J. Higgins, Gordon G. Wallace, Jiazhao Wang
Domain Wall Conductivity In Oxygen Deficient Multiferroic Ymno3 Single Crystals, Yi Du, Xiaolin Wang, Dapeng Chen, S X. Dou, Z. Cheng, Michael J. Higgins, Gordon G. Wallace, Jiazhao Wang
Australian Institute for Innovative Materials - Papers
The transport properties of domain walls in oxygen deficient multiferroic YMnO3 single crystals have been probed using conductive atomic force microscopy and piezoresponse force microscopy. Domain walls exhibit significantly enhanced conductance after being poled in electric fields, possibly induced by oxygen vacancy ordering at domain walls. The electronic conduction can be understood by the Schottky emission and Fowler-Nordheim tunnelling mechanisms. Our results show that the domain wall conductance can be modulated through band structure engineering by manipulating ordered oxygen vacancies in the poling fields.
Fabrication, Magnetic, And Ferroelectric Properties Of Multiferroic Bifeo3 Hollow Nanoparticles, Yi Du, Z. Cheng, S X. Dou, Darren J. Attard, Xiaolin Wang
Fabrication, Magnetic, And Ferroelectric Properties Of Multiferroic Bifeo3 Hollow Nanoparticles, Yi Du, Z. Cheng, S X. Dou, Darren J. Attard, Xiaolin Wang
Australian Institute for Innovative Materials - Papers
Hollow BiFeO3nanoparticles were synthesized by an electrospray route for the first time. The phase purity and structure have been investigated by x-ray diffraction and Raman spectroscopy. Transmission and scanning electron microscope investigations revealed that the as-obtained BiFeO3 hollow spheres were polycrystalline, with a shell thickness of 35 nm. The formation mechanism can be possibly explained by Ostwald ripening. Raman spectra have verified decreased vibrational frequencies in BiFeO3nanoparticles. These hollow and core-shell multiferroicnanoparticles exhibit significantly enhanced ferromagnetism from 5 to 600 K due to a broken spiral spin structure. The ferroelectricity of hollow BiFeO3 particles …
Dye-Sensitized Cualo2 Photocathodes For Tandem Solar Cell Applications, Andrew Nattestad, Xiaoli Zhang, Udo Bach, Yi-Bing Cheng
Dye-Sensitized Cualo2 Photocathodes For Tandem Solar Cell Applications, Andrew Nattestad, Xiaoli Zhang, Udo Bach, Yi-Bing Cheng
Australian Institute for Innovative Materials - Papers
Dye-sensitized solar cells (DSCs) using the p-type semiconductor CuAlO2, in conjunction with a highly effective hole injecting dye and an iodide-triiodide-based electrolyte have been produced, demonstrating photocathodic behavior. An improved open-circuit voltage (VOC) of 333 mV was observed, compared to analogous devices using NiO, which can be explained by the CuAlO2 valence-band energy, which is lower on the vacuum scale than that of NiO. Incident photon-to-charge-carrier efficiency response confirms that the observed photocurrent is generated by the dye.
Chitosan Adhesive Films For Photochemical Tissue Bonding, Antonio Lauto, Damia Mawad, Matthew Barton, Sabine C. Piller, Leonardo Longo
Chitosan Adhesive Films For Photochemical Tissue Bonding, Antonio Lauto, Damia Mawad, Matthew Barton, Sabine C. Piller, Leonardo Longo
Australian Institute for Innovative Materials - Papers
Photochemical tissue bonding (PTB) is a promising sutureless technique for tissue repair. PTB is often achieved by applying a solution of rose bengal (RB) between two tissue edges, which are irradiated by a green laser to crosslink collagen fibers with minimal heat production. In this study, RB has been incorporated in chitosan films to create a novel tissue adhesive that is laser-activated. Materials and Methods. Adhesive films, based on chitosan and containing ∼0.1wt% RB were manufactured and bonded to calf intestine by a solid state laser (wavelength =532nm, Fluence ∼110J/cm2, spot size ∼5 mm). A single-column tensiometer, interfaced with a …
Prevention No Cure: A Critique Of The Report Of Australia's National Preventative Health Taskforce, Alex Robson, Mark D. Harrison
Prevention No Cure: A Critique Of The Report Of Australia's National Preventative Health Taskforce, Alex Robson, Mark D. Harrison
SMART Infrastructure Facility - Papers
No abstract provided.
Train Schedule Coordination At Interchange Station In An Open Railway Market Through Agent Negotiation, Chi W. Tsang, Tin K. Ho, Kwan Ho Ip
Train Schedule Coordination At Interchange Station In An Open Railway Market Through Agent Negotiation, Chi W. Tsang, Tin K. Ho, Kwan Ho Ip
SMART Infrastructure Facility - Papers
In open railway markets, coordinating train schedules at an interchange station requires negotiation between two independent train operating companies to resolve their operational conflicts. This paper models the stakeholders as software agents and proposes an agent negotiation model to study their interaction. Three negotiation strategies have been devised to represent the possible objectives of the stakeholders, and they determine the behavior in proposing offers to the proponent. Empirical simulation results confirm that the use of the proposed negotiation strategies lead to outcomes that are consistent with the objectives of the stakeholders.
Contextual Effects In Modeling For Small Domain Estimation, Mohammad-Reza Namazi-Rad, David G. Steel
Contextual Effects In Modeling For Small Domain Estimation, Mohammad-Reza Namazi-Rad, David G. Steel
SMART Infrastructure Facility - Papers
Many different Small Area Estimation (SAE) methods have been proposed to overcome the challenge of findingreliable estimates for small domains. Often, the required data for various research purposes are available at differentlevels of aggregation. Based on the available data, individual-level or aggregated-level models are used in SAE.However, parameter estimates obtained from individual and aggregated level analysis may be different, in practice.This may happen due to some substantial contextual or area-level effects in the covariates which may be misspecifiedin individual-level analysis. If small area models are going to be interpretable in practice, possible contextualeffects should be included. Ignoring these effects leads …