The objective of this research was to elucidate the response of geological media such as sand and soil to high-speed and high-pressure loading of projectiles. Particularly, penetration mechanics of high-speed projectiles into granular materials and response of granular media to shock waves were our substantial concern. One of unique the approaches we proposed was to collect numerical data and imaging data in laboratory scale experiments on high-speed projectile impacts using ...
Optical memory has two recording modes: the photon-mode as a silver halide photograph and the heat-mode as a laser optical disk. Though laser heat-mode recording has the advantage of environmental stability, it has limitations due to thermal diffusion phenomena, which will be discussed in this paper. Optical disk memory has the unique feature of read-only media performance, which is also compatible with the rewritable function and is different from HDD ...
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