著者
陳 錦祥 橋本 良作 福山 佳孝 松下 政裕 小河 昭紀 大沢 真人 横川 忠晴 厚田 広史
出版者
一般社団法人日本機械学会
雑誌
日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A (ISSN:03875008)
巻号頁・発行日
vol.72, no.716, pp.432-437, 2006-04-25
参考文献数
19

The effects of crystal orientation (&theta;) on the structural strength of single crystal trubine vanes and blades calculated with the finite element method (FEM) are discussed in this paper. TMS-75, a 3<SUP>rd</SUP> generation single-crystal Ni-base superalloy, is chosen as the model material for turbine vanes and blades. It became clear that, (1) the elastic constant matrix changes were equivalence for each of three coordinate due to the orientation variation (0&deg;<&theta;<90&deg;), and the strength of the turbine vane and blade were strongly related to &theta;, and also depended on the load and model shape. (2) The strength dependence of the turbine vane on the crystal orientation was depended on coordinate plane : there are lower Mises stress in XY plane and maximum Mises stress in near the &theta;=45&deg;at both YZ and ZX Planes. (3) In the case of a blade, the influence is similar to the vane on blade tip, but the converse holds for the blade root. It is clear that the creep rupture time can be extended, when the <100> crystallographic axes is the Y or X axis of the blade under higher revolution speed.

1 0 0 0 OA 張衡と占術

著者
前原 あやの
出版者
関西大学東西学術研究所
雑誌
関西大学東西学術研究所紀要 (ISSN:02878151)
巻号頁・発行日
vol.45, pp.67-80, 2012-04

Zhang Heng was a Chinese astronomer who lived during the Eastern Han Dynasty of China. Zhang was promoted to grand historian (太史令), and his job was to record heavenly observations. Zhang believed that any observable phenomenon could be explained by scientific means and he tried to seek a rational explanation for such phenomena. Zhang submitted a report entitled 請禁絶図讖疏 to the emperor about his controversial ideas, and criticized the prognosticatory character of fortune-telling called Tuchen (図讖; prediction, prophecy). On the other hand, Zhang accepted 占術 (divination), which he specifically official. In fact, some kinds of divination, for example, Boshi (卜筮; scapulimancy and divination), and oneirocritics (夢占い) were used and described in the books entitled 思玄賦 and 霊憲 written by Zhang. The fact that Zhang criticized Tuchen (図讖) is widely known, but no specific study has been done regarding Zhang's criteria of judgment as to "wha". This article discusses the divination that appeared in books written by Zhang and reviews his critique on Tuchen (図讖), which clarify his thoughts on a close relationship between heavenly bodies and divination. The author provides an account of Zhang's philosophy and evaluates Zhang's philosophy both from the point of view as a literary man and as a scientist against the background of the history of thought in the Eastern Han Dynasty.
著者
佐久間 正明
出版者
Tohoku University
巻号頁・発行日
2017-03-24

課程
著者
岡崎 直人 木谷 光伸 田中 利雄
出版者
公益財団法人 日本醸造協会
雑誌
日本釀造協會雜誌 (ISSN:0369416X)
巻号頁・発行日
vol.79, no.2, pp.133-136, 1984-02-15 (Released:2011-11-04)
参考文献数
8

蒸米上における麹菌の増殖におよぼす温度の影響について検討し, 増殖の限界温度が45℃ であること, 再び40℃ にすれば増殖が再開されることを見い出したっこのことは製麹管理上重要なことと思われる。また, 気中の炭酸ガス濃度を一定に保って麹菌の増殖に伴う酸素吸収を得定する方法を考案し, 炭酸ガスの影響を調べた。その結果, 0.1~1.0%の範囲で発芽の誘導期間を短縮する効果があること, 1%以上存在すると増殖を幾分阻害し, それに伴って酵素生産も低下することを認めた。
出版者
日経BP社
雑誌
日経ビジネス (ISSN:00290491)
巻号頁・発行日
no.888, pp.52-54, 1997-04-28

衛星を使ったインターネットサービスが登場した。一度に電話回線の数倍のデータを送れる。衛星によるテレビ放送との同時サービスも始まる。「ちゃんと接続しているのに,いったいいつになったらホームページの画面の続きが見えるんだ!」——。最近,インターネットの利用者からこんなイライラの声をよく聞く。