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Sorting effect of sand of mixed grain size was investigated by a movable bed experiment under the condition with dominant longshore sand transport. In a plane wave tank of 4m width, a model beach of the slope 1/10 and composed of mixed sand, d50 of which are 0.2mm and 2mm, was made and waves were incident obliquely. Mixed rate of fine and coarse sand is 1:1. Sorting effect by longshore sand transport was confirmed and experimental results were compared with the numerical simulation using the one-line model considering sorting of each grain proposed by Kumada et al. Predicted results agreed with the experimental results.

我々の施設では, 口腔癌に対して機能温存, 形態温存を目的に動注, 放射線同時併用療法を行っている。今回は, 一次治療時で腫瘍が消失し外科療法を行わずに良好な経過が得られている下顎歯肉癌の1例について報告する。患者は65歳女性で, 初診時, 左側下顎歯槽部を中心に38×26mmの腫瘍を認め, X線所見にて下顎管におよぶ骨吸収を認めた。入院後, 浅側頭動脈カニュレーションを行い, PEP (総量48mg) , MTX (総量200mg) およびCDDP (総量100mg) の3剤併用化学療法と放射線療法 (Linac総線量40Gy) を行った。治療後臨床的に腫瘍は縮小, 消失し, positoron emission tomographyによる機能的画像診断による治療効果の評価でもCRと判定した。治療後2年2か月経過した現在, 再発, 転移は認めていない。

It is very important for structural designer to evaluate properly the brittle fracture characteristics of steel plates. Though comparatively reliable data can be obtained from so called large scale laboratory tests, they are unsuitable for commercial acceptance test methods from the view point of efficiency, economy, etc.On the other hand the interpretation of current commercial test such as Charpy test is rather obscure and evaluation of notch toughness of materials in relation to service failure depends almost solely on accumulation of experiences in service performances with the lack of accepted theoretical basis.The present authors previously reported of the sucessful results of fracture mechanics analysis on the double tension test (brittle fracture propagation test) and new interpretation and method of analysis for such test results and further insisted that similar method of analysis and correlation study should be made on small size test. In this report the results of analysis based on abovementioned considerations are discussed in comparison with the results from double tension test.Though there are something to be improved for the practical purposes, fundamental characteristics of the small size test of this sort have been clarified to some extent from fracture mechanics view point and some important data were obtained which will be available for future improvements in small size tests.