ORCID Profile
0000-0003-1463-6985
Current Organisations
University of Sydney
,
Indonesian Institute of Sciences
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Manufacturing Engineering | Manufacturing Processes and Technologies (excl. Textiles) | Inorganic Chemistry | Solid State Chemistry | Petroleum and Reservoir Engineering | Electrochemistry | Timber, Pulp and Paper | Condensed Matter Imaging |
Oil and Gas Extraction | Energy Storage (excl. Hydrogen) | Wood, Wood Products and Paper not elsewhere classified | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Fabricated Metal Products not elsewhere classified
Publisher: Elsevier BV
Date: 2020
Publisher: American Physical Society (APS)
Date: 02-07-2008
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4811939
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.JMBBM.2018.10.032
Abstract: Bone is a complex hierarchal structured material with varying porosity and mechanical properties. In particular, human cranial bone is essentially a natural composite consisting of low porosity outer and inner tables and a cancellous interior, or diploë. Experimental studies of biomechanically accurate cranial bone analogues are of high importance for biomechanical, forensics, and clinical researchers, which could improve the understanding and prevention of traumatic injury. Many reported studies use commercially available bone surrogates to draw biomechanical and forensics conclusions however, their mechanical properties are not tabulated over a range of strain rates. This study elucidates the mechanical viability of three leading commercially available bone surrogates, i.e. Synbone, Sawbone, and Bonesim, over a large range of strain rates (10
Publisher: Informa UK Limited
Date: 16-09-2013
Publisher: Elsevier BV
Date: 2014
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4811936
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA02353A
Abstract: A representative volume of LCMA coated porous SiC showing a maximum of 23% shrinkage when subject to high-temperature CO 2 conversion redox reactions. This results in significant structural changes including a reduction in specific surface area.
Publisher: Springer Science and Business Media LLC
Date: 05-09-2015
Publisher: Elsevier BV
Date: 05-2021
Publisher: Elsevier BV
Date: 10-2016
Publisher: Elsevier BV
Date: 2016
Publisher: Springer Science and Business Media LLC
Date: 10-02-2020
DOI: 10.1038/S41598-020-58216-Y
Abstract: Sulphur dioxide (SO 2 ) is removed from flue gases prior to discharge into the atmosphere by high temperature sulphation reactions with the mineral calcite (CaCO 3 ) in the form of calcite aggregates such as limestone. The efficiency of this industrial-scale process is constrained by the self-inhibiting growth of anhydrite (CaSO 4 ) along calcite grain boundaries. Using very high resolution X-ray μCT and Scanning Electron Microscopy we show, for the first time, how the sulphation reaction is initiated by the anisotropic thermal expansion of calcite grains to produce high inter-grain permeability. In turn fast gas-solid reaction occurs to produce a network of porous anhydrite layers between grains. In idual calcite grains are then free to rotate and translate with respect to each other as the sulphation reaction proceeds. Grain translations of up to 24 μm and rotations of up to 0.64 degrees have been tracked in s les of a highly compacted calcite aggregate (Carrara Marble) across up to 600,000 grains through heating and cooling cycles during exposure to SO 2 gas flow at temperatures from 600 to 750 °C at one atmosphere. Such grain kinematics help to maintain gas phase permeability in the solid reactant and mitigate the inhibitory growth of porous anhydrite on grain boundaries.
Publisher: American Geophysical Union (AGU)
Date: 11-2021
DOI: 10.1029/2021WR030891
Abstract: Geologic sequestration in sedimentary formations has been identified as a potential technology to prevent climate‐change inducing carbon dioxide (CO 2 ) from being emitted to the atmosphere. To achieve safe and effective storage underground, accurate understanding, and predictions of supercritical CO 2 (scCO 2 ) behavior in subsurface rock formations is required including quantifying how much scCO 2 is trapped within pore spaces by capillarity (vs. how much remains mobile), and constraining the occurrence of physio‐chemical reactions between scCO 2 and the mineral matrix. Experiments where multiple cycles of scCO 2 and brine are injected into rock s les have produced conflicting results regarding the consistency of trapping as cycles progress likely due to differences in mineral content, pressure‐temperature conditions, aqueous chemistry parameters, and experimental setups. We present a new set of experiments, replicating the conditions of a previous study, but with a new experimental design, apparatus, and timeline. We confirm previous results that demonstrated shifts in injection pressure and scCO 2 trapping behavior over multiple injection cycles, and we conduct additional analyses to discern the fluid‐fluid macroscopic contact angle, interface mean and Gaussian curvatures, scCO 2 interfacial area, and topology of trapped scCO 2 ganglia. We also performed lattice‐Boltzmann simulations approximating experimental conditions where solid wettability was systematically altered over multiple injections cycles trends in scCO 2 ganglia characteristics compare well between experiment and simulation. The results indicate that this system undergoes a transition to a “patchy” mixed‐wet state, and we observe that this wettability alteration renders scCO 2 more stable in the rock pore space, increasing capillary trapping over four injection cycles.
Publisher: SPIE
Date: 31-08-2006
DOI: 10.1117/12.679205
Publisher: American Physical Society (APS)
Date: 13-02-2002
Publisher: Elsevier BV
Date: 04-2018
Publisher: Wiley
Date: 21-09-2018
DOI: 10.1111/JACE.16007
Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 05-2021
Publisher: IOP Publishing
Date: 07-2015
Publisher: Elsevier BV
Date: 08-2004
Publisher: Elsevier BV
Date: 07-2009
Publisher: Elsevier BV
Date: 2019
Publisher: The Open Journal
Date: 13-07-2020
DOI: 10.21105/JOSS.02286
Publisher: IOP Publishing
Date: 31-07-2006
Publisher: Springer Science and Business Media LLC
Date: 04-03-2020
Publisher: Elsevier BV
Date: 08-2005
Publisher: Elsevier BV
Date: 06-2008
Publisher: Elsevier BV
Date: 2021
Publisher: Springer International Publishing
Date: 2017
Publisher: Springer International Publishing
Date: 2017
Publisher: Wiley
Date: 2010
Publisher: American Physical Society (APS)
Date: 02-10-2013
Publisher: American Physical Society (APS)
Date: 10-2014
Publisher: American Physical Society (APS)
Date: 05-06-2015
Publisher: Elsevier BV
Date: 08-2019
Publisher: Elsevier BV
Date: 09-2012
Publisher: Elsevier BV
Date: 04-2023
Publisher: Informa UK Limited
Date: 09-2008
Publisher: Author(s)
Date: 2017
DOI: 10.1063/1.4971709
Publisher: EDP Sciences
Date: 2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1SM00774B
Abstract: 3D rendering of the experimental packing obtained via X-ray CT. A cut-out section shows the bulk crystallisation and partially crystallised regions.
Publisher: arXiv
Date: 2022
Publisher: SPE
Date: 09-11-2015
DOI: 10.2118/177017-MS
Abstract: An Australian bituminous coal is imaged at high resolution of 16.1 μm with (wet) and without (dry) X-ray attenuating fluids present in the pore space using a large-field three-dimensional microfocus helical X-ray computed tomography (micro-CT) instrument. Scanning Electron Microscope (SEM) is conducted on slices of the specimen to visualize coal micro-features up to resolution of about 15 nm. Two- and three-dimensional image registration techniques are used to precisely overlay micro-CT tomograms of the core plug in dry and wet conditions and SEM images to yield detailed three-dimensional visualizations of the geometry and topology of the fracture systems in coal. SEM images are also used to produce a calibration curve based on the relationship between the micro-CT intensity values and the true apertures of fractures within coal. This eliminates the need for two sets of imaging. Advanced filtering algorithms are applied to segment the micro-CT image into four distinct phases: resolved fractures, sub-resolution pores and fractures, macerals, and minerals. The application of micro-CT in determination of relative age relationships between adjacent geological features is presented. The distribution of resolved aperture size within the coal s le is investigated and the variation of permeability and porosity in several sub-s les of the coal is plotted. The analysis suggests that coal permeability is independent of porosity and is likely affected by other petrophysical properties such as lithotype. To include the effects of mineral phase on coal properties, we remove the segmented mineral phase and merge it to the resolved fracture phase. This analysis affirms that minerals are deposited in highly connected regions.
Publisher: Elsevier BV
Date: 2019
DOI: 10.2139/SSRN.3366008
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2SM00922F
Abstract: In a tomographic study of a bidisperse mixture of ellipsoidal placebo pills, a simple mixture distribution is found to reproduce the local packing fraction distributions.
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4811995
Publisher: Elsevier BV
Date: 2012
Publisher: American Physical Society (APS)
Date: 06-2005
Publisher: SPIE
Date: 26-10-2004
DOI: 10.1117/12.559200
Publisher: Elsevier BV
Date: 06-2017
Publisher: Asosiasi Peneliti dan Teknisi Kehutanan dan Lingkungan Hidup Indonesia
Date: 30-04-2023
DOI: 10.59465/IJFR.2023.10.1.75-90
Abstract: Doubtlessly, wood identification is critically important for a number of sectors, including government organizations, the wooden-based industry, museums, law enforcement, and scientists working in the fields of botany, ecology, forestry, and wood technology. Unfortunately, most wood species listed as “the least-known species” lack essential knowledge or even their anatomical feature and basic properties to promote their usage. This research aimed to investigate the anatomical characteristics and fiber quality of the least-known timber species of Apocynaceae family, which are authentic wood collection from Xylarium Bogoriense, namely , Ervatamia. sphaerocarpa, E. aurantiaca, Kopsia flavida, Lepiniopsis ternatensis, Plumeria acuminata, P. rubra, and Voacanga foetida. Wood s les have indistinct growth ring boundaries, diffuse-porous vessels in diagonal and/or radial pattern, vessels in radial multiples of 4 or more cells, simple perforation plate, alternate intervessel pits distinct borders of vessel-ray pits, similar with those of intervessel pits in size and shape throughout the ray cell, and septate fibers with simple pits to minutely bordered pits which are common in radial and tangential walls. Based on the fiber length and the derived values of fiber dimension, some species are classified into Quality Class II and III, and the rest of them are classified into Quality Class II or III for pulp and paper manufacturing. Based on general characteristics, commonly Apocynaceae can be used as handicrafts raw material. Based on the fiber quality, some species which are classified into Quality Class II, are predicted to have potential as pulp and paper material with medium quality.
Publisher: Author(s)
Date: 2017
DOI: 10.1063/1.4971710
Publisher: IOP Publishing
Date: 05-2010
Publisher: Society of Exploration Geophysicists
Date: 09-2012
Publisher: Elsevier BV
Date: 06-2016
Publisher: Wiley
Date: 04-2005
Publisher: EDP Sciences
Date: 2017
Publisher: American Geophysical Union (AGU)
Date: 2016
DOI: 10.1002/2015WR017937
Publisher: Elsevier BV
Date: 2023
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4811946
Publisher: American Physical Society (APS)
Date: 14-04-2015
Publisher: Elsevier BV
Date: 08-0002
Publisher: Elsevier BV
Date: 2020
Publisher: The Royal Society
Date: 13-02-2014
Abstract: Recent advances in the cataloguing of three-dimensional nets mean a systematic search for framework structures with specific properties is now feasible. Theoretical arguments about the elastic deformation of frameworks suggest characteristics of mechanically isotropic networks. We explore these concepts on both isotropic and anisotropic networks by manufacturing porous elastomers with three different periodic net geometries. The blocks of patterned elastomers are subjected to a range of mechanical tests to determine the dependence of elastic moduli on geometric and topological parameters. We report results from axial compression experiments, three-dimensional X-ray computed tomography imaging and image-based finite-element simulations of elastic properties of framework-patterned elastomers.
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 04-2014
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 06-2021
Publisher: AIP Publishing
Date: 08-2022
DOI: 10.1063/5.0093650
Abstract: This article describes a microtomography experimental platform enabling in situ micro-mechanical study of failure and fragmentation in geomaterials. The system is based on an original high-pressure triaxial flow cell, which is fully integrated into a custom built microtomography scanner equipped with a laboratory x-ray source. The design of the high-precision mechanical apparatus was informed by the concurrent development of advanced tomographic reconstruction methods based on helical scanning and of algorithms correcting for hardware inaccuracies. This experimental system produces very high-quality 3D images of microstructural changes occurring in rocks undergoing mechanical failure and substantial fragmentation. We present the results of two experiments as case studies to demonstrate the capabilities and versatility of this instrumental platform. These experiments tackle various questions related to the onset of rock failure, the hydromechanical coupling and relaxation mechanisms in fractured rocks, or the fragmentation process in geomaterials such as copper ores.
Publisher: The Royal Society
Date: 05-2021
Abstract: Termites inhabit complex underground mounds of intricate stigmergic labyrinthine designs with multiple functions as nursery, food storage and refuge, while maintaining a homeostatic microclimate. Past research studied termite building activities rather than the actual material structure. Yet, prior to understanding how multi-functionality shaped termite building, a thorough grasp of submillimetre mechanistic architecture of mounds is required. Here, we identify for Nasutitermes exitiosus via granulometry and Fourier transform infrared spectroscopy analysis, preferential particle sizes related to coarse silts and unknown mixtures of organic/inorganic components. High-resolution micro-computed X-ray tomography and microindentation tests reveal wall patterns of filigree laminated layers and sub-millimetre porosity wrapped around a coarse-grained inner scaffold. The scaffold geometry, which is designed of a lignin-based composite and densely biocementitious stercoral mortar, resembles that of trabecula cancellous bones. Fractal dimension estimates indicate multi-scaled porosity, important for enhanced evaporative cooling and structural stability. The indentation moduli increase from the outer to the inner wall parts to values higher than those found in loose clays and which exceed locally the properties of anthropogenic cementitious materials. Termites engineer intricately layered biocementitious composites of high elasticity. The multiple-scales and porosity of the structure indicate a potential to pioneer bio-architected lightweight and high-strength materials.
Publisher: Elsevier BV
Date: 05-2012
Publisher: Emerald
Date: 07-12-2015
DOI: 10.1108/ETPC-07-2015-0055
Abstract: – The purpose of this paper is to consider the growing interest in oracy and to propose the pedagogy of process drama as an ideal model for the dialogic classroom. – This paper takes the form of an explanatory case study where the author draws on a successful drama/oracy project in a primary school in Brisbane, Australia, to illustrate the connections between Alexander’s five indicators of a dialogic classroom and the process drama in which the students participated. – The application of this process drama as pedagogy for the teaching and learning of oracy has contributed positively to students’ oral communication skills and intercultural awareness. In addition, parents provide positive feedback about student engagement in school and developing self-confidence because “they have something to say”. – There was no formal pre-post test for the oral communication skills on this study, instead the researchers developed a draft “oracy” checklist which deserves further interrogation and development. – There are implications for the use of process drama as a means of creating and sustaining the dialogic classroom. Teacher professional development would be required to assist the planning and delivery of dramas that allow for the deep and complex learning evidenced in this study. – This is an ideal vehicle for assisting in the development of empathy, collaboration, emotional intelligence and intercultural understanding. – This is an ex le of an extremely high-quality curriculum plan and implementation. The importance of engaging in implicit and explicit instruction of oral communication for the twenty-first century should not be underestimated. The process drama allows oral language to be foregrounded, with additional learning opportunities from a range of other learning areas, brought together in a coherent and complex model of practice.
Publisher: The Royal Society
Date: 18-04-2006
Abstract: We describe a three-dimensional imaging and analysis study of eight industrial cellular foam morphologies. The foam morphologies were generated by differing industrial processing methods. Tomograms are acquired on an X-ray micro-computed tomography facility at scales of approximately equal to at resolutions down to 7 μm. The image quality is sufficient in all cases to measure local structure and connectivity of the foamed material, and the field of view large enough to calculate a range of material properties. Phase separation into solid and porous components is straightforward. Three-dimensional structural characteristics are measured directly on the porous and solid phases of the images. A number of morphological parameters are obtained, including pore volume-to-surface-area ratio, connectivity, the pore and solid phase size distributions defined by maximal sphere openings and chord length measurements. We further calculate the pore size distribution associated with capillary pressure via simulating of mercury drainage on the digital images. The binarized microstructures are used as a basis for calculations of transport properties (fluid permeability, diffusivity and thermal conductivity) and elastic moduli. From the data, we generate property–porosity relationships for the range of foam morphologies imaged and quantitatively analyse the effects of porosity and microstructure on the resultant properties of the foams. We compare our numerical data to commonly used theoretical and empirical property–porosity relationships. For thermal conductivity, we find that the numerical results agree extremely well with an empirical expression based on experimental data of various foams. The upper Hashin–Shtrikman bound also provides an excellent prediction of the data across all densities. From simulation of the diffusivity, we can define the tortuosity of the pore space within the cellular solid. We find that different processing methods lead to strong variations in the tortuosity of the pore space of the foams. For elastic properties, our results show that for the Young modulus, E , both the differential effective medium theory and the classical correlation give a good correlation. Assuming a constant Poisson's ratio leads to reasonable agreement. The best correlation for is given by assuming a slight variation in as a linear function of porosity. The permeability of the foams varies over three orders of magnitude. Correlations for permeability based on the classical Kozeny–Carman equation lead to reasonable agreement, except at the lowest porosities. Permeability estimations based on mercury porosimetry give excellent agreement for all foams.
Publisher: Springer Science and Business Media LLC
Date: 12-05-2017
DOI: 10.1038/NCOMMS15082
Abstract: Uncovering grain-scale mechanisms that underlie the disorder–order transition in assemblies of dissipative, athermal particles is a fundamental problem with technological relevance. To date, the study of granular crystallization has mainly focussed on the symmetry of crystalline patterns while their emergence and growth from irregular clusters of grains remains largely unexplored. Here crystallization of three-dimensional packings of frictional spheres is studied at the grain-scale using X-ray tomography and persistent homology. The latter produces a map of the topological configurations of grains within static partially crystallized packings. Using numerical simulations, we show that similar maps are measured dynamically during the melting of a perfect crystal. This map encodes new information on the formation process of tetrahedral and octahedral pores, the building blocks of perfect crystals. Four key formation mechanisms of these pores reproduce the main changes of the map during crystallization and provide continuous deformation pathways representative of the crystallization dynamics.
Publisher: Elsevier BV
Date: 09-2022
DOI: 10.1016/J.ASD.2022.101191
Abstract: Termites sense tiny substrate-borne vibrations through subgenual organs (SGOs) located within their legs' tibiae. Little is known about the SGOs' structure and physical properties. We applied high-resolution (voxel size 0.45 μm) micro-computed tomography (μCT) to Australian termites, Coptotermes lacteus and Nasutitermes exitiosus (Hill) to test two staining techniques. We compared the effectiveness of a single stain of Lugol's iodine solution (LS) to LS followed by Phosphotungstic acid (PTA) solutions (1% and 2%). We then present results of a soldier of Nasutitermes exitiosus combining μCT with LS + 2%PTS stains and scanning electron microscopy to exemplify the visualisation of their SGOs. The termite's SGO due to its approximately oval shape was shown to have a maximum diameter of 60 μm and a minimum of 48 μm, covering 60 ± 4% of the leg's cross-section and 90.4 ± 5% of the residual haemolymph channel. Additionally, the leg and residual haemolymph channel cross-sectional area decreased around the SGO by 33% and 73%, respectively. We hypothesise that this change in cross-sectional area lifies the vibrations for the SGO. Since SGOs are directly connected to the cuticle, their mechanical properties and the geometric details identified here may enable new approaches to determine how termites sense micro-vibrations.
Start Date: 07-2019
End Date: 06-2025
Amount: $3,981,223.00
Funder: Australian Research Council
View Funded ActivityStart Date: 05-2021
End Date: 05-2025
Amount: $420,000.00
Funder: Australian Research Council
View Funded Activity