A5111893782- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Atmospheric chemistry and aerosols
- Geophysics and Gravity Measurements
- Meteorological Phenomena and Simulations
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Atmospheric aerosols and clouds
- Wind and Air Flow Studies
- Quantum and electron transport phenomena
- Pasture and Agricultural Systems
- Wind Energy Research and Development
- Quantum many-body systems
- Spectroscopy and Laser Applications
- Technology Adoption and User Behaviour
- Enzyme function and inhibition
- Environmental and Air Quality Management
- Fiscal Policies and Political Economy
- Technostress in Professional Settings
- Enhanced Recovery After Surgery
- Quantum-Dot Cellular Automata
- Phytoestrogen effects and research
- Gene Regulatory Network Analysis
Rigetti Computing (United States)
2023-2025
University of Cape Town
2022-2024
Groote Schuur Hospital
2024
Queensland Government
2022
Queensland Department of Environment and Science
2013-2014
The University of Queensland
1996-2003
Using NASA's A‐Train satellite measurements, we evaluate the accuracy of cloud water content (CWC) and vapor mixing ratio (H 2 O) outputs from 19 climate models submitted to Phase 5 Coupled Model Intercomparison Project (CMIP5), assess improvements relative their counterparts for earlier CMIP3. We find more than half show CMIP3 CMIP5 in simulating column‐integrated amount, while changes simulation are insignificant. For models, model spreads differences observations larger upper troposphere...
Abstract. We use a coupled atmosphere-ocean global climate model (CSIRO-Mk3.6) to investigate the drivers of trends in summer rainfall and circulation vicinity northern Australia. As part Coupled Model Intercomparison Project Phase 5 (CMIP5), we perform 10-member 21st century ensemble driven by Representative Concentration Pathway 4.5 (RCP4.5). To roles different forcing agents, also multiple ensembles historical change, which are analysed for period 1951–2010. The runs include "all...
Abstract The vertical distributions of cloud water content (CWC) and fraction (CF) over the tropical oceans, produced by 13 coupled atmosphere‐ocean models submitted to Phase 5 Coupled Model Intercomparison Project (CMIP5), are evaluated against CloudSat/CALIPSO observations as a function large‐scale parameters. Available CALIPSO simulator CF outputs also examined. A diagnostic framework is developed decompose simulation errors into errors, parameterization covariation errors. We find that...
Combinatorial optimization is a broadly attractive area for potential quantum advantage, but no algorithm has yet made the leap. Noise in hardware remains challenge, and more sophisticated quantum-classical algorithms are required to bolster their performance. Here, we introduce an iterative heuristic solve combinatorial problems. The reduces classical greedy presence of strong noise. We implement on programmable superconducting system using up 72 qubits solving paradigmatic...
We develop a hardware-efficient ansatz for variational optimization, derived from existing ansatzes in the literature, that parametrizes subsets of all interactions cost Hamiltonian each layer. treat gate orderings as parameter and observe doing so can provide significant performance boosts experiments. carried out experimental demonstration runs compilation-optimized implementation fully connected Sherrington-Kirkpatrick Hamiltonians on 50-qubit linear-chain subsystem Rigetti's Aspen-M-3...
Abstract. All the representative concentration pathways (RCPs) include declining aerosol emissions during 21st century, but effects of these declines on climate projections have had little attention. Here we assess global and hemispheric-scale anthropogenic aerosols in RCP4.5 CSIRO-Mk3.6, a model from Coupled Model Intercomparison Project Phase 5 (CMIP5). Results this are then compared with those other CMIP5 models. We calculate effective radiative forcing (ERF, including indirect effects)...
Abstract The effects of declining anthropogenic aerosols in representative concentration pathway 4.5 (RCP4.5) are assessed four models from phase 5 the Coupled Model Intercomparison Project (CMIP5), with a focus on annual, zonal-mean atmospheric temperature structure and zonal winds. For each model, effect is diagnosed difference between projection forced by RCP4.5 for 2006–2100 another that has identical forcing, except fixed at early twenty-first-century levels. response to interpreted...
We use single-forcing historical simulations with a coupled atmosphere–ocean global climate model to compare the effects of anthropogenic aerosols (AAs) and increasing long-lived greenhouse gases (LLGHGs) on simulated winter circulation in Southern Hemisphere (SH). Our primary focus is subtropical jet, which an important source baroclinic instability, especially Australasian region, where speed jet largest. For period 1950 2005, our suggest that AAs weaken whereas LLGHGs strengthen jet. The...
The application of the Nesbet algorithm to full iterative solution two-dimensional master equation for thermal unimolecular reactions is presented. This leads an efficient computing rate coefficients in falloff regime such as simple fission dissociations, radical−radical recombinations, and ion−molecule wherein microcanonical dissociation are sensitive both vibrational energy angular momentum excited species.
Abstract. We use a coupled atmosphere-ocean global climate model (CSIRO-Mk3.6) to investigate the roles of different forcing agents as drivers summer rainfall trends in Australasian region. Our results suggest that anthropogenic aerosols have contributed observed multi-decadal increase over north-western Australia. As part Coupled Model Intercomparison Project Phase 5 (CMIP5), we performed multiple 10-member ensembles historical change, which are analysed for period 1951–2010. The runs...
Abstract Introduction and hypothesis Fully absorbable implants may be an alternative to permanent meshes in the correction pf pelvic organ prolapse (POP) as they reduce adverse events by promoting tissue regeneration collagen metabolism. This study was aimed at evaluating long-term host biomechanical response a fully poly-4-hydroxybutyrate (P4HB) scaffold comparison with polypropylene (PP) mesh. Methods Poly-4-hydroxybutyrate ( n = 16) PP mesh were surgically implanted posterior vaginal wall...
Achieving high-quality solutions faster than classical solvers on computationally hard problems is a challenge for quantum optimization to deliver utility. Using superconducting computer, we experimentally investigate the performance of hybrid quantum-classical algorithm inspired by semidefinite programming approaches solving maximum cut problem 3-regular graphs up several thousand variables. We leverage structure input address sizes beyond what current machines can naively handle. attain an...
A new method of calculating the absolute spectral density a Hamiltonian operator is derived and discussed. The expressed as solution an integral equation in which kernel renormalized one-sided energy correlation function full microcanonical for reference Hamiltonian. associated with this transforms known into equation, by virtue its formulation space, inherently one-dimensional offers no storage difficulties, elements may be computed applying Lanczos algorithm to randomly selected...
Trend analysis and change point detection in a time series are frequent tools. Change is the identification of abrupt variation process behaviour due to natural or artificial changes, whereas trend can be defined as estimation gradual departure from past norms. We analyze data presence trend, using Cox-Stuart methods together with algorithms. applied near-surface wind speed for Australia an example. The trends speeds have been investigated based upon our newly developed datasets, which were...
Global warming is affecting extreme events, such as floods, droughts, heat waves and bushfires, with important consequences for human communities ecosystems. Large-scale reforestation, especially in the tropics sub-tropics, has potential to help mitigate this trend projected increases events. This raises an question Australia: what of large-scale reforestation changes climate during 21st Century? An first step addressing accurately represent key land surface characteristics a model.
We develop a hardware-efficient ansatz for variational optimization, derived from existing ansatze in the literature, that parametrizes subsets of all interactions Cost Hamiltonian each layer. treat gate orderings as parameter and observe doing so can provide significant performance boosts experiments. carried out experimental runs compilation-optimized implementation fully-connected Sherrington-Kirkpatrick Hamiltonians on 50-qubit linear-chain subsystem Rigetti Aspen-M-3 transmon processor....