A5058161910- Magnetic confinement fusion research
- Origins and Evolution of Life
- Thermal and Kinetic Analysis
- Laser-Plasma Interactions and Diagnostics
- Energetic Materials and Combustion
- Nonlinear Dynamics and Pattern Formation
- Advanced Thermodynamics and Statistical Mechanics
- Ionosphere and magnetosphere dynamics
- Quantum chaos and dynamical systems
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Protein Structure and Dynamics
- Chemical Looping and Thermochemical Processes
- thermodynamics and calorimetric analyses
- Chemical Thermodynamics and Molecular Structure
- Spectroscopy and Quantum Chemical Studies
- Process Optimization and Integration
- Photoreceptor and optogenetics research
- Thermochemical Biomass Conversion Processes
- Fire effects on ecosystems
- Carbon Dioxide Capture Technologies
- Fire dynamics and safety research
- Indigenous Health, Education, and Rights
- RNA and protein synthesis mechanisms
- High-Energy Particle Collisions Research
Australian National University
2012-2025
Australian Mathematical Sciences Institute
2010-2025
Canberra (United Kingdom)
2019
University of Alberta
2018
University of Michigan
2011
University of Aberdeen
2009
Defence Science and Technology Group
2009
Princeton Plasma Physics Laboratory
2001
Princeton University
2001
University of Guelph
1999
The Hasegawa-Wakatani equations, coupling plasma density, and electrostatic potential through an approximation to the physics of parallel electron motions, are a simple model that describes resistive drift wave turbulence. Numerical analyses bifurcation phenomena in presented, provide new insights into interactions between turbulence zonal flows tokamak edge region. simulation results show regime where, after initial transient, is suppressed flow generation. As parameter controlling strength...
AbstractA simple dynamical system that models the competitive thermokinetics and chemistry of cellulose decomposition is examined, with reference to evidence from experimental studies indicating char formation a low activation energy exothermal process volatilization high endothermal process. The thermohydrolysis at core primary competition described. Essentially, between two nucleophiles, molecule water an −OH group on C6 end glucosyl cation, form either reducing chain fragment propensity...
A continuing frustration for origin of life scientists is that abiotic and, by extension, pre-biotic attempts to develop self-sustaining, evolving molecular systems tend produce more dead-end substances than macromolecular products with the necessary potential biostructure and function - so-called 'tar problem'. Nevertheless primordial somehow emerged despite presumed handicap. resolution this problem important in emergence-of-life science because it would provide valuable guidance choosing...
A simple model for the thermal decomposition of amorphous cellulose is proposed that rationalizes effect water in promoting charring process at expense volatilization. Simulations mass-loss histories and product evolution are shown to be consistent with various experimental observations literature. Under char-promoting conditions where heat transfer limited, anomalous effects predicted which indicate char formation may not always desirable fire-inhibiting treatments or strategies cellulosic...
It is now accepted that primordial non-cellular RNA communities must have been subject to a periodic drive in order replicate and prosper. We proposed the oxidation of thiosulfate by hydrogen peroxide as this drive. This reaction system behaves (i) thermochemical (ii) pH oscillator, work, we unify for first time. report thermally self-consistent, dynamical simulations which transitions smoothly from nearly isothermal fully developed thermo-pH oscillatory regimes. use oscillator simulated...
The hydrogen peroxide (HP) crucible hypothesis proposed here holds that life began in a localized environment on Earth was perfused with flow of from sustained external source, which powered and mediated molecular evolution the protocellular RNA world. In this article, we consolidate review recent evidence, both circumstantial tested simulation our work laboratory others' work, for its multiple roles first living systems: (1) it provides periodic power source as thiosulfate–hydrogen (THP)...
Abstract HEXITEC is a spectroscopic imaging X-ray detector technology developed at the STFC Rutherford Appleton Laboratory for and γ-ray applications. Each module has 80 × pixels on 250 μm pixel pitch, been implemented successfully in number of This paper presents 2 system, tiled array 4 modules read out simultaneously, which provides an active area 16 cm . Systems have produced using 1 mm thick Cadmium Telluride (CdTe) Zinc (CdZnTe) sensor material. In this system data processing methods...
The purpose of this research is to identify and characterize oscillatory thermal instability in organic peroxides that are used vast quantities industry misused by terrorists. explosive decompositions lauroyl peroxide, methyl ethyl ketone triacetone triperoxide investigated computationally, using a continuous stirred tank reactor model literature values the kinetic parameters. Mathematical stability analysis track instability, which may be violent. In mild regime it shown that, principle,...
Electron thermal fluxes are derived from the power balance for Tore Supra (TS) and NSTX discharges with centrally deposited fast wave electron heating. Measurements of temperature density profiles, combined ray tracing computations absorption allow detailed interpretation flux versus gradient. Evidence supporting occurrence gradient turbulent transport in two confinement devices is found. With control magnetic rotational transform profile heating power, internal barriers created TS...
In a major extension of previous work, we model the putative hydrothermal rock pore setting for origin life on Earth as series coupled continuous flow units (the toy train ). Perfusing through this are reactants that set up thermochemical and pH oscillations, an activated nucleotide produces monomer dimer monophosphates. The dynamical equations system thermally self-consistent. innovative step breaks some new ground, build stochasticity inputs into model. computational results infer various...
This paper presents and tests a previously unrecognised mechanism for driving replicating molecular system on the prebiotic earth. It is proposed that cell-free RNA replication in primordial soup may have been driven by self-sustained oscillatory thermochemical reactions. To test this hypothesis well-characterised hydrogen peroxide oscillator was chosen as driver complementary strands with known association melting kinetics were used substrate. An open flow model self-consistent, coupled...
We analyse a simplified dynamical model that emulates the overall process of self-assembly amphiphilic molecules into micelles under non-equilibrium conditions. The study is motivated by review experimental evidence in literature for occurrence bistability and hysteresis diverse self-assembling molecular systems. Singularity theory conditions classifications bifurcations are used to map bifurcation structure model. analysis predicts micellar systems may exhibit hysteresis. It also provides...
Two dynamical thermokinetic systems for simultaneous reaction models of polymer decomposition are compared. In the independent-parallel model, common reactant is divided explicitly between reactions, and in competitive model entire mass available to both reactions. Elementary bifurcation analyses show that two give quite different predictions thermal behaviour systems. The properties derivative thermogravimetric curves independent discussed, with reference experimental data cellulose.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransient Thermal Behavior of the Hydration 2,3-Epoxy-1-propanol in a Continuously Stirred Tank ReactorR. Ball and B. F. GrayCite this: Ind. Eng. Chem. Res. 1995, 34, 11, 3726–3736Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/doi/10.1021/ie00038a008https://doi.org/10.1021/ie00038a008research-articleACS PublicationsRequest reuse permissionsArticle...
The steady states of the dynamical Endex CSTR problem are analysed in terms degenerate bifurcation (singularity) theory. Steady–state analysis is used two ways: (1) as a device to assist understanding and predicting complex behaviour; (2) practical design operational tool, by applying concept quasi–static parameter variation. In analysis, consideration given effects thermal mismatching, kinetic variations exchange, mass flux heat loss rate parameters, on structure space. qualitative...