Hellfried Schneider

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INTRODUCTION Few longitudinal data about rates of bone loss in women in midlife exist. Fewer still with their reproductive states having been carefully assessed and sequentially followed-up. METHODS Complete data from 50 women younger than 60 years (mean age at baseline 48.3 ± 5.4 years) were prospectively collected over 9 years. This was done by(More)
The present study treats the calculation of the continuous phase of a multiphase flow, i.e. the numerical solution of the equations for a turbulent incompressible flow. An existing SIMPLE based Single–Grid algorithm is improved applying the Multi–Grid Method. Numerical experiments for two test cases with up to 3 174 400 finite volumes show the features of(More)
The parallelization of the solution algorithm for the set of continuity, Navier–Stokes and turbulence model equations is carried out by parallelization in space, that means by application of the domain decomposition or grid partitioning method. Using a block-structured grid the flow domain is partitioned in a number of subdomains. Usually the number of grid(More)
Dust accumulation inside next-step fusion devices poses a significant safety concern and dust diagnostics will be needed to assure safe operations. An electrostatic dust detection device has been successfully demonstrated in the National Spherical Torus Experiment, Tore Supra, and the Large Helical Device, and the detector's response to carbon particles was(More)
This paper describes aspects of magnetic diagnostics for realtime control in National Spherical Torus Experiment-Upgrade (NSTX-U). The sensor arrangement on the upgraded center column is described. New analog and digital circuitry for processing the plasma current Rogowski data are presented. An improved algorithm for estimating the plasma vertical velocity(More)
Three methods for applying the FM algorithm to censored data are considered, the Buckley-James (1979), a proposed simpler nonparametric method and a normal model for censored data. A new estimator for the variance of y in the Buckley-.James model is proposed and simulations comparing the three methods are descrihcd. To illustrate the use of these methods(More)
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