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Because experiment/model comparisons in magnetic confinement fusion have not yet satisfied the requirements for validation as understood broadly, a set of approaches to validating mathematical models and numerical algorithms are recommended as good practices. Previously identified procedures, such as verification, qualification, and analysis of error and(More)
In addition to the operational limits imposed by MHD stability on plasma current and pressure, an independent limit on plasma density is observed in confined toroidal plasmas. This review attempts to summarize recent work on the phenomenology and physics of the density limit. Perhaps the most surprising result is that all of the toroidal confinement devices(More)
Adult rats exposed to the DNA-methylating agent methylazoxymethanol on embryonic day 17 show a pattern of neurobiological deficits that model some of the neuropathological and behavioral changes observed in schizophrenia. Although it is generally assumed that these changes reflect targeted disruption of embryonic neurogenesis, it is unknown whether these(More)
The spurious drift in pitch angle of order several degrees measured by the motional Stark effect (MSE) diagnostic in the Alcator C-Mod tokamak over the course of an experimental run day has precluded direct utilization of independent absolute calibrations. Recently, the underlying cause of the drift has been identified as thermal stress-induced(More)
Scientific user facilities—particle accelerators, telescopes, colliders, supercomputers, light sources, sequencing facilities , and more—operated by the U.S. Department of Energy (DOE) Oce of Science (SC) generate ever increasing volumes of data at unprecedented rates from experiments, observations , and simulations. At the same time there is a growing(More)
Overview: Scientific collaboration, both international and domestic, is already enhanced via technologies that allow remote participation in experiments and scientific discussions. This mode of collaboration, while not ideal in all ways, offers several distinct advantages: 1. It lowers the travel and relocation burden on collaborators. Moreover, in addition(More)