Mike Ashworth

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Shelf and coastal seas are regions of exceptionally high biological productivity, high rates of biogeochemical cycling and immense socio-economic importance. They are, however, poorly represented by the present generation of Earth system models, both in terms of resolution and process representation. Hence, these models cannot be used to elucidate the role(More)
We consider two non-statistical definitions of entropy for dynamic (non-stationary) black holes in spherical symmetry. The first is analogous to the original Clausius definition of thermodynamic entropy: there is a first law containing an energy-supply term which equals surface gravity times a total differential. The second is Wald’s Noether-charge method,(More)
Accurately representing coastal and shelf seas in global ocean models represents one of the grand challenges of Earth system science. They are regions of immense societal importance through the goods and services they provide, hazards they pose and their role in global-scale processes and cycles, e.g. carbon fluxes and dense water formation. However, they(More)
Sphygmomanometers are the cornerstone of blood pressure management and yet there is no national standard for the regulation of this equipment in the UK. It is known that these machines may often be inaccurate, particularly those used in the community. We embarked upon a survey of all sphygmomanometers in current use in one inner city primary care group.(More)
In recent years, the increased use of off-the-shelf components and the large-scale adoption of parallel computing have led to a dramatic reduction in the costs associated with high-performance computing. This has enabled increased usage of compute-intensive methods, such as Direct Numerical Simulation (DNS), for the simulation of turbulent flows. We(More)
The “problem of time” has been a pressing issue in quantum gravity for some time. To help understand this problem, Rovelli proposed a model of a two harmonic oscillators system where one of the oscillators can be thought of as a “clock” for the other oscillator thus giving a natural time reference frame for the system. Recently, the author has constructed(More)
An industrial aerospace code has been parallelised for execution on shared memory and distributed memory architectures. The flow solver uses an explicit time integration approach and utilises an agglomeration multigrid strategy to accelerate the convergence. A novel method has been used to efficiently parallelise the multigrid solver that also minimised any(More)