Atsushi Fukuyama

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A global simulation code is developed to study the ICRF heating combining two global simulation codes: a full wave field solver, TASK/WM, and a drift kinetic equation solver, GNET. The both codes can treat a 3-D magnetic configuration based on the MHD equilibrium by VMEC code. The developed code is applied to the ICRF minority heating in a simple circular(More)
Theory of non-local transport has been developed, taking an example of zonal flows (ZFs), the radial correlation length of which is longer than those for microscopic fluctuations. ZF, which is driven by fluctuations at one radius, can suppress fluctuations at distant radii. This mechanism induces new non-local interactions in turbulent transport. That is,(More)
The purpose of this investigation was to analyze three-dimensional images of the optic nerve obtained by magnetic resonance angiography (MRA) in cases of anterior communicating artery aneurysm and craniopharingioma. Four ruptured anterior communicating artery aneurysms, five non-ruptured anterior communicating artery aneurysms and two craniopharingiomas(More)
INTRODUCTION We aim to elucidate the effect of spatial resolution of three-dimensional cine phase contrast magnetic resonance (3D cine PC MR) imaging on the accuracy of the blood flow analysis, and examine the optimal setting for spatial resolution using flow phantoms. MATERIALS AND METHODS The flow phantom has five types of acrylic pipes that represent(More)
PURPOSE Since film processors used for screen-film systems have been decreasing recently, it is becoming difficult to develop duplicating film (Dup film) used conventionally. The purpose of this study was to evaluate the usefulness of the method of duplicating film using a computed radiography (CR) system. MATERIALS AND METHODS The process of duplicating(More)
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