Sentences with phrase «d numerical simulations»

Not exact matches

«The explanation that we came up with — which people who do numerical simulations have been suggesting for a long time — is that whatever this reservoir is with primitive helium, it must be really dense so that only the hottest, most buoyant plumes can entrain some of it to the surface,» Jackson said.

(2) A complete numerical simulation of the motions taking place in the outer core would make it necessary to cover a wide range of scales with a very small time step, which is out of reach with current capabilities.

By using experiments and numerical simulations, Ishikawa and Kikuchi have shown that microorganisms can ingeniously escape from a dead end by swimming.

«In a nutshell, we have discovered using numerical simulations a physical regime where we would generate the highest magnetic fields ever generated on Earth.

To ensure accurate anatomical representation in the numerical simulations of the sprayed drug transport process, they used computed tomography (CT) scans from CRS patients and imaging software to develop anatomically realistic digital 3 - D models.

Astrophysicists have since created numerical simulations of the Tunguska event to try to decide among the competing hypotheses.

Mena provided a mathematical model and numerical simulations of the phenomenon, but the next step — using evidence of the presence of glyphosate in Ecuador to determine whether Colombia had respected the no - spraying zone — proved more challenging.

When the geometry of such a system is specified, the simulator allows the user to vary primary and secondary scattering foil material and thickness and to see results in approximately 100 milliseconds, about 10 million times faster than Monte Carlo simulations, which are simulations and computational algorithms that rely on random sampling to obtain results for extremely complex problems that have only numerical solutions.

Previously he has written numerical simulations to represent a wide variety of systems ranging from the microscopic deformation in the cogs and gears of machinery to the evolution of jellyfish.

Professor Claude - André Faucher - Giguère and his research group, along with collaborators from the FIRE («Feedback In Realistic Environments») project, which he co-leads, had developed sophisticated numerical simulations that produced realistic 3 - D models of galaxies, following a galaxy's formation from just after the Big Bang to the present day.

With the aid of numerical simulation, the scientist and his team have developed a crash - optimized track design for bending stress such as might arise when a car collides head - on with a tree or is hit by another car from the side.

Since this was first predicted in 1988, many research groups in the field have confirmed and refined numerical simulations, while others used static compression techniques to explore the phase diagram of water at high pressure.

The shock waves are usually considered planar surfaces but numerical simulations have previously showed that ripples can form on the surface of shock waves.

We perform numerical simulations to predict the occurrence of astrophysical false positives detectable by the Mission, and quantify the fraction of them that would pass the Kepler candidate vetting procedure.

His work has also provided the theoretical underpinnings for LIGO; he and his colleagues have established target sources of gravitational waves and carried out numerical simulations of the kind that allowed the September 2015 signal to be identified as a pair of merging black holes.

Among the numerous star - planet interaction (SPI) models that have been developed, magnetohydrodynamic (MHD) simulations combine state of the art numerical models of cool star magnetospheres with simplified models of planets.

The technological by - products of this effort, particularly in computing, aeronautics and astronautics, telecommunications, numerical simulation, and optics, have helped to give the nation an economic competitive advantage.

In addition, tidal forces affecting the Oort Cloud come from the differential gravitational forces exerted by stars in the Milky Way's galactic disk and by the galactic core on the Sun and comets as a result of their relative location in the Solar System, which have been modelled with numerical simulations (Duncan et al, 1987).

This Project aims to determine through numerical simulation the effects which spacecraft launched in Norway have on the peripheral ionospheric plasma environment in the observed region.

This suggestion of an accelerated warming in a deep layer of the ocean has been suggested mostly on the basis of results from reanalyses of different types (that is, numerical simulations of the ocean and atmosphere that are forced to fit observations in some manner).

Dr. Dallas Kennedy has coined the phrase «uncontrolled numerical approximations» for all climate model simulations inconsistent with the observed climate and insufficiently scrutinized.

Recent numerical simulations suggest the coupling between the stratospheric and tropospheric circulations has practical applications for weather forecasting and also implications for tropospheric climate change (see text on Climate Change, below).

We have found that much of the literature is unreliable and that the numerical methods used in virtually all the simulation software is not adequate to resolve or estimate the true uncertainty.

Also the behaviour of our numerical simulations of the atmosphere would continue to be affected by the problems typical of model simulations of chaotic dynamical systems even if we could have perfect initial conditions, write perfectly accurate evolution equations and solve them with perfect numerical schemes, just because of the limited number of significant digits used by any computer (Lorenz, 1963).

Every book I've ever read on statistical mechanics or thermodynamics is wrong — and you can safely assume I've read a few, since I did numerical simulations of both static and dynamic critical phenomena that actually were published in places like Physical Review, with referees and everything — or figure 2 above makes it clear that there is no possibility that figure 1 is correct.

«Observations and numerical simulations both suggest that agricultural intensification has cooled temperatures and enhanced rainfall.»

After all of this, if you are still interested in my formal academic qualification, I have a PhD, now work in the pvte sector but in research on numerical simulations.

The result of each test of data set quality or of observation - simulation agreement was expressed as a numerical score, and then these scores were merged into an overall measure of confidence in the hypothesis that human - generated emissions have affected the regional climate, ranging from «none» to «very high».

Throughout the next decade, many idealized numerical experiments demonstrated the capability of this model to produce a realistic hurricane structure, although it would not be until the 1980s that simulations would be attempted using data from real storms.

Doing this renders the D = S assumption invalid, as we have an equilibrium occurring (an unstable one, but an equilibrium) without D = S being true, which leaves economists with few tools to work with aside from numerical simulation and the under - developed branch of economics dealing with complex systems analysis.