著者

児玉 良明 角川 明 高橋 孝仁 石川 暁 川北 千春 金川 健 戸田 保幸 加藤 洋治 地本 晶彦 山下 和春 永松 哲朗

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

vol.2002, no.192, pp.1-13, 2002 (Released:2007-05-30)

参考文献数

17

被引用文献数

5 2

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This paper is the first half of the report on the study on microbubbles carried out by the SR239 project of the Shipbuilding Research Association of Japan, and describes the preparatory study for the full-scale experiment using a 116m-long ship. In the present study, first the skin friction reduction effect by microbubbles was investigated including the use of an array-of-holes plate for bubble generation, the effects of streamwise pressure gradient, surface curvature, and vertical plate, the sea-water effect, and the effect of bubble size. Bubble generators for the full-scale experiment were designed and built, and a preliminary injection experiment was carried out. Two new measuring devices for the full-scale experiment were developed; they are skin friction sensors and local void ratio sensors. Microbubble experiments were carried out in a 400m-long towing tank using a 50m-long flat plate ship, in order to obtain the scale effect data and to confirm the validity of the new devices for the full-scale experiment. The use of adhesives to fix measurement devices and cables on the hull surface was tested and established. The hydrodynamic fairing of the cables was also tested and established. Finally, a preliminary microbubble experiment using a small ship was carried out and the bubble behavior was observed.

著者

加藤 洋治

出版者

公益社団法人日本船舶海洋工学会

雑誌

咸臨 : 日本船舶海洋工学会誌 (ISSN:18803725)

巻号頁・発行日

no.8, 2006-09-10

著者

水田 啓介 伊藤 八次 西田 基 秋田 茂樹 加藤 雅也 小塩 勝博 海田 健宏 古田 充哉 宮田 英雄 柳田 正巳 柴田 康成 横山 壽一 松原 茂規 小泉 光 森 芳郎 大野 通敏 近藤 由香 藤宮 大 山田 匡彦 渡辺 英彦 加藤 洋治

出版者

耳鼻咽喉科臨床学会

雑誌

耳鼻咽喉科臨床 (ISSN:00326313)

巻号頁・発行日

vol.90, no.12, pp.1399-1407, 1997-12-01 (Released:2011-11-04)

参考文献数

14

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IPD® (supratast tosilate) was investigated for its prophylactic efficacy and therapeutic efficacy in the treatment of cedar pollinosis during the 1996 cedar pollen season. The subjects investigated were patients at the Gifu University School of Medicine and its affiliated hospitals, who had a history of cedar pollinosis. The patients were classified into two treatment groups: the prophylaxis group (70 patients), in whom IPD® administration began before the start of cedar pollen dispersion, and the treatment group (49 patients), who underwent IPD® treatment only after cedar pollen dispersion had begun and symptoms of pollinosis had manifested.Results were as follows: (1) The nasal symptoms (sneezing, runny nose, nasal congestion) were milder in the prophylaxis group than in the treatment group throughout the cedar pollen season, with the difference being significant during the season's first 2 weeks. (2) In the prophylaxis group, IPD®'s inhibitory effect was rated as excellent in 18.6% of the patients, good in 45.7% and fair in 20.0%. In the treatment group, the improvement in the symptoms was rated as disappearance in 4.2%, excellent in 20.8% and good in 43.8%. (3) When symptom inhibition in the prophylaxis group was investigated as a function of the duration of IPD® administration prior to the start of pollen dispersion, the good + excellent inhibition rate was 57.7% in the subpopulation pretreated for <2 weeks (26 cases), 64.9% with 2 to <4 weeks' pretreatment (37 cases) and 85.7% with 4 to <6 weeks' pretreatment (7 cases). Thus, IPD®'s prophylactic inhibitory rate increased with the length of the pretreatment period. (4) In the prophylaxis groups, the CAP-RAST value was significantly reduced at the time of peak pollen level and at the end of the pollen season compared with the value before IPD® administration.

著者

永松 哲郎 児玉 良明 角川 明 高井 通雄 村上 恭二 石川 暁 上入佐 光 荻原 誠功 吉田 有希 鈴木 敏夫 戸田 保幸 加藤 洋治 池本 晶彦 山谷 周二 芋生 秀作 山下 和春

出版者

公益社団法人日本船舶海洋工学会

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

no.192, pp.15-28, 2002-12

参考文献数

11

被引用文献数

7 12

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This paper is the second half of the report on the study on microbubbles carried out by the SR239 project of the Shipbuilding Research Association of Japan, and describes the full-scale experiment using "SEIUN MARU", a 116m-long training ship that belongs to the Institute for Sea Training. Using numerical analysis and the experimental data obtained in the preparatory study described in the first half of the report, the net energy saving of SEIUN MARU by microbubbles at 14kts was estimated to be 2%. In the full-scale experiment, the trajectory of the generated bubbles was observed using underwater TV cameras and was found to shift more upward than predicted. The local skin friction was measured at several locations on the hull surface, and the skin friction increase as well as decrease by the bubbles was measured. The local void ratio was measured at one point on the hull surface, and the bubbles were found to travel slightly away from the hull surface. The change of the ship speed and shaft horsepower by microbubbles was measured, and the decrease or increase of engine power at constant ship speed was analyzed. In the most cases of the experiment the ship speed decreased by the bubble injection, mainly due to the increase of ship resistance and the decrease of propeller efficiency caused by the bubbles going into the working propeller. But, by carefully choosing the bubble injection location and thus avoiding the bubble entrainment into the propeller, the 3% power saving at a constant speed of 14kts was obtained. By taking into account the power needed to inject bubbles against hydrostatic pressure due to water depth at the injection point, this corresponds to the net power saving of 2%. Thus the net power saving by microbubbles was measured on a full-scale ship for the first time in the world.

著者

加藤 洋治

出版者

公益社団法人日本船舶海洋工学会

雑誌

日本造船学会誌 (ISSN:03861597)

巻号頁・発行日

no.654, 1983-12

著者

岩田 重信 三嶋 由充子 西村 忠郎 川勝 健司 石神 寛通 佐藤 達明 斉藤 路子 宮沢 亨司 馬場 駿吉 高木 一平 加藤 洋治 堀部 昌代 野々山 勉 木村 哲郎 松浦 由美子 浅井 美洋

出版者

The Japan Broncho-esophagological Society

雑誌

日本気管食道科学会会報 (ISSN:00290645)

巻号頁・発行日

vol.47, no.6, pp.510-525, 1996-12-10

被引用文献数

31 15

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434 cases (216 males and 218 females) of esophagus and 182 cases (118 males and 64 females) of broncho-tracheal foreign bodies gathered from the ENT departments of 7 universities located in the Tokai area of Japan were statistically analyzed during past 10 years. As esophageal foreign bodies, PTP (35.1%) ranked first, followed by coins (24.0%), peaces of meat (10.9%), and fish bones (10.0%). In regard to broncho-tracheal foreign bodies, 75.1% of all cases were under 3-year-olds patients. Transluscent foreign bodies were found in 86.3% of all cases. The foreign bodies were beans in 68.1% of all cases, followed by artifical teeth in 11.5%. The foreign bodies were lodged in the right bronchas with the same frequency as in the left. In this study, PTP foreign bodies have occurred most often in the esophagus recently, and the discussed the prevention of PTP foreign bodies in this paper.

著者

加藤 洋治 山口 一 岡田 真三 菊池 浩平 宮永 大

出版者

公益社団法人日本船舶海洋工学会

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

no.150, pp.140-147, 1981-12

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It is well-known that sheet cavitation inception is dependent on laminar separation. There-fore, the sheet cavitation might be controlled by restraining the separation. Authors tried to control sheet cavitation on an axisymmetric body by water jet injection, and proved experimentally that it was possible to suppress the sheet cavity. The nondimensional injection flow rate for the cavity suppression depended only on Reynolds number. The leading edge of the sheet cavity coincided with separation point which was visualized by oil film method. By increasing injection rate the reattachment point of separation bubble moved upstream and finally the separation bubble vanished. The sheet cavitation also vanished at the same condition.