著者
國分 朋之 祖山 均
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 (ISSN:21879761)
巻号頁・発行日
vol.84, no.863, pp.18-00161, 2018 (Released:2018-07-25)
参考文献数
23
被引用文献数
1

Peening is one of the mechanical surface modification techniques, which is used to improve the fatigue strength by the introduction of the compressive residual stress into the surface of specimen. Several peening techniques, such as shot peening, cavitation peening and laser peening have been proposed and demonstrated the improvement of fatigue strength. Mechanical properties on surface modification layer vary with the techniques because of the difference of mechanism of impacts and strain rate. Therefore, it is possible to improve the fatigue strength further by hybrid peening, which is a combination of different peening techniques, due to controlling the mechanical properties on surface modification layer. In this paper, in order to demonstrate the suppression of fatigue crack propagation by hybrid peening combining shot peening and cavitation peening or cavitation peening and laser peening, the fatigue crack propagation in duralumin treated by hybrid peening was investigated, and the crack propagation behavior of the specimen treated by hybrid peening and single peening method was compared. The relationship between the fatigue crack propagation and the mechanical properties was also evaluated. It was revealed that hybrid peening (former process: laser peening, latter process: cavitation peening and former process: cavitation peening, latter process: shot peening) was more effective to suppress the fatigue crack propagation than single peening method and the number of cycle to failure of the specimen treated by hybrid peening was the largest. The new indicator f(σR’, HV’, Rz’, β’) = σR・HV・β/Rz combined with four factors i.e. compressive residual stress σR, Vickers hardness HV, full-width at half maximum β and maximum height roughness Rz showed the effect of suppression of fatigue crack propagation by peening.
著者
長谷川 憲孝 松井 保 田中 泰雄 高橋 嘉樹 南部 光広
出版者
公益社団法人 土木学会
雑誌
土木学会論文集C (ISSN:1880604X)
巻号頁・発行日
vol.63, no.4, pp.923-935, 2007 (Released:2007-10-19)
参考文献数
10

神戸空港は神戸港沖に埋立造成して築造されたが,海底地盤には沖積粘土層が厚く堆積している.埋立造成にあたっては,これら沖積粘土層の圧密特性を把握する必要があり,その特性を把握するために事前土質調査と各種計測器による計測を行ってきた.その結果,沖積粘土層は擬似過圧密状態であり,その程度は西~北西域で高いことが明らかとなった.施工の進行に伴って,過圧密比の高いエリアにおいて,室内土質試験結果による解析値よりも大きな沈下実測値が得られ,圧密進行後の間隙比も室内土質試験結果より小さい値を示すことが分かった.このことより,これらエリアにおいては解析を行う際に過圧密比を低減する必要が生じた.見直し後の解析値は,その後の実測値とほぼ一致しており,見直しの妥当性が確認できた.
著者
森 威史
出版者
國學院大學綜合企画部
雑誌
國學院雜誌 (ISSN:02882051)
巻号頁・発行日
vol.67, no.12, pp.51-57, 1966-12
著者
飯田 四郎
出版者
京都府立医科大学
雑誌
京都府立医科大学雑誌 (ISSN:00236012)
巻号頁・発行日
vol.38, no.1, pp.653-661, 1943

History. -H. K., a girl aged 14, whose family history was completely negative, was admitted to our clinic became of eruptions an her face, neck and body. The eruptions had been present for the past 12 years. According to her mother's statement, a few red papules appeared in the right zygomatic region of her child when she was two years old. They increased and spread gradually over her face. Examination of the skin. -There were numerous brownish red fairly well defined papules, the size of a miliary to a grain of rice, with minute teleangiectases symmetrically an her forehead, nose, chin, in the nasolabial folds and cheeks. There was a tendency towards confluence in the nasolabial folds and chin. The consistency was generally elastic and firm. On her neck, thorax, abdomen and back were found sporadical papules and nodules in the same quality mentioned above with rather normal skin color. Slightly raised normal skin colored or slightly brown plaques, just like a fibroma molluseum in appearance, some definitely pedunculated and others not so peduneulated, were detected an the neck, thorax, abdomen and genitals though small in number. Another firm socalled shark leather-like nodular plaque, approximately one by two centimetre, were distributed over the upper part of the back and loin. Physical examination. -The patient was moderate in stature, well nourished, irrexpressive and slow in action. Her heart and Jungs were normal. No abnormalities were found in the abdomen by palpation. Wassermann's reaction of the blood was negative. Both Pirquet's cutaneous reaction and Mantoux's percuta-neous reaction were negative. The erythrocytes numbered 4,000,000 and the leucocytes numbered 7,400 per cubic millimetre and the differential ratio of the leucocytes was almost normal. The hemoglobin content was 70 per cent (Sahli). The average worth of the descending velocity of the rod blood corpuseles was 22 millimetre (Westergren). The blond sugar content was 102 milligram decilitre (Hagedorn). The urine was microscopieally normal. The funetion of panereas was also normal. There was no evidence of the disturbance of the function of the kidney. The chromocystopsia, pneumoren, phenolsulfonphthalein test and water test gave negative results. The psychodynamic examination proved that the patient had subnormal intelligence. There were no epileptic seizures after her admission to the clinic. The cerebrospinal fluid was normal. In the left putamen region of tue pneumoencephalogram a sign of a cerebral tumor was found. On the ophthalmologic examination a tumor slightly larger than a papilla composed probably of the connective tissue or the cells of neuroglia was discovered along vasa tempolalis superior of retina of the both eyes. Roentgenologic examination of the bone gave negative results. Pharmacodynamic examination of the visceral nerve System resulted negatively. On examination of the function of the liver the following results were obtained: Takata's reaction was negative. Diazo-reaction was also negative. The metabolism of sugar examined by the charge test with levulose after Strauss and the charge test with lactose after Bauer resulted both slightly positive. The metabolism of albumin examined by amin acid test and the stability test with strange albumin both gave positive results. On the examination of the excretive function of the pigment it was proved that the methylen-blue test after Roch was positive, while that after Rosenthal and Falkenhausen, the indigo-carmin test after Lepehne and the asorbin test after Kuraya were all negative. Both the urobilin test and the urobilinogen fest of the urine gave positive results while the bili-rubin test was negative. I have never seen in former reports such findings which prove that a disturbance of the function of the liver could occur in this disease, though it is not unimaginable.Histopathological examination. -There were little to choose among the histopathological findings of the small tumors. They will be summarized here accordingly. Epidermis: There was no evident charge in the epithelial layers of epidermis. Corium: There was a noticeable hyperplasia of the connective tissue fibres in the whole layers of corium. The sebaceous glands and the sweat glands behaved almost normally, though some of them were hyperplastic and some were hypoplastic. The elastic fibres showed segmentation, diminution and eben disappearance in the highly hyperplastic part of the connective tissue, There were dilated and even newly formed blood vessels with perivaseular round Gell infiltration in the focus. As a peculiar finding in tumors from the nasolabial folds I can enumerate cysts of various sizes, localized sporadically in corium, filled with cholesterin-like substance and surrounded with stratified pavement epithelium. Some pair follicles in this specimen were atrophic, some were cornificated and some were dilated and filled with light reddish substance in the double staining with hematoxylin-eosin. The hair follicles were surrounded notably with round cells. Judging from the findings which indicate various stages of the hair follicles changing into cysts due to pressure, I was able to conclude that the hyperplasia of the sebaceous glands in this case occurred with that of the connective trssue or later time.
出版者
巻号頁・発行日
vol.8 和州高取城,
著者
橋本 尚美 山根 冠児 沖井 則文 石之神 小織 恩田 秀賢 田路 浩正 花谷 亮典
出版者
日本脳神経外科コングレス
雑誌
脳神経外科ジャーナル (ISSN:0917950X)
巻号頁・発行日
vol.18, no.7, pp.525-530, 2009-07-20 (Released:2017-06-02)
被引用文献数
3 3

特発性脳脊髄液減少症には,数週間の安静や点滴による治療を行い,非改善例に自家血硬膜外注入療法が適応される.今回,特発性脳脊髄液減少症に対する自己血注入療法後5日目に症状が再発し,その後,慢性硬膜下血腫と昏睡を生じた症例を経験した.意識障害に対しては保存的な対応が可能であったため,再度自己血注入療法による脊髄液減少症の治療を先行した後に,穿頭洗浄術を行い症状の改善を得た.髄液漏の再発に伴い,急激な脳圧変化が生じ,硬膜下血腫の増悪や意識障害をきたしうる.さらには検査時の腰椎穿刺が頭蓋内環境の変化を誘発する可能性も考慮する必要があり,初回治療により症状が改善した後にも十分な観察が必要である.
著者
柳沢裕之
雑誌
日医雑誌
巻号頁・発行日
vol.127, pp.261-268, 2002
被引用文献数
3
著者
劉 琳
出版者
北海道大学文学研究科
雑誌
研究論集 (ISSN:13470132)
巻号頁・発行日
vol.15, pp.109-124, 2016-01-15

『日本書紀』は日本最古の編年体史書,六国史の第一として古くから尊重さ れてきた。日本の正史にふさわしいものとするために,『日本書紀』全書三十 巻は歌謡部分を除き,当時日本周辺の朝鮮半島諸国や中国で共通して使用さ れた正式な漢文によって記述された。『日本書紀』に関する解釈・研究には, 長い伝統がある。この書が完成された翌年(721年)から早く当時の宮廷にお いて「日本書紀講筵」と呼ばれる『日本書紀』の本文を読み解く講義が行わ れた。そして,『日本書紀』に関する研究の蓄積として,『日本書紀』の諸古 写本に存する訓点・日本書紀私記類・日本書紀の注釈書など,長く伝えられ ている。このように,『日本書紀』の本文を読み下す長い伝統から生まれてき たもの,即ち『日本書紀』の諸古写本に存する訓点のことを日本書紀古訓と 言う。日本書紀古訓は『日本書紀』の本文を解釈する重要な典拠である。そ して,古い日本語の実態を知る上で重要な手懸かりの一つであるため,従来 重要視されてきた。 『日本書紀』の現存する諸伝本の中,巻二二と巻二四を有する伝本は比較的 多い。本稿では日本書紀古訓形容詞の実態,特に各伝本における異同を考察 するために,巻二二と巻二四を有する平安時代,室町時代及び江戸時代の代 表的な『日本書紀』の古写本,版本を用いる。考察内容は,各伝本から収集 した古訓形容詞のデータに基づいて付訓状況・語数・使用語彙などを統計し, 各伝本における同一漢文に当てられた古訓を比較し,その共通面と相違面を 検討することである。考察を通して日本書紀古訓の形容詞は,どのような性 格を有するものか,明らかにしたいと思う。また,日本書紀古訓形容詞の様 相,異なる伝本において古訓形容詞語彙使用の実態及びその相違などを解明 することも本稿の目的である。

1 0 0 0 OA 蕗原拾葉

著者
長野県上伊那郡教育会 編
出版者
鮎沢印刷所
巻号頁・発行日
vol.第4輯, 1940
著者
小松原 明哲
出版者
Japan Ergonomics Society
雑誌
人間工学 (ISSN:05494974)
巻号頁・発行日
vol.27, no.2, pp.73-82, 1991-04-15 (Released:2010-03-11)
参考文献数
7
被引用文献数
1 2

対話型システムにおいて, 多数の選択項目から効率よく目的項目を選択するためのメニュー選択システムとして, 1画面にすべての選択項目を, 類似したものどうしをグルーピングして呈示する単層階層メニュー選択システムを提案し, このグループサイズの決定方法について検討した. このシステムのユーザ行動をモデル化したところ, グループ数とグループ内選択項目数の積の平方根の近傍の整数値となるようにグループサイズを決定すれば, 最短目的項目探索時間が期待できることが予想された. この仮説を検討する実験を行ったところ, 仮説が支持される結果を得ることができた.