著者
溝端 裕亮 藤田 真敬 大類 伸浩 菊川 あずさ 小林 朝夫 高田 邦夫 立花 正一 岩本 鉄也 山口 大介 木村 幹彦 別宮 愼也
出版者
航空医学実験隊
雑誌
航空医学実験隊報告 (ISSN:00232858)
巻号頁・発行日
vol.56, no.4, pp.79-93, 2016 (Released:2020-04-11)
参考文献数
54
被引用文献数
1

Spatial disorientation (SD) is a false perception of position, motion or attitude by the pilots, and the largest risk factor for fatal accidents. Prevention of SD is difficult. Early realization and withdrawal from SD using instrument flight is the best way to prevent accidents. To prevent accidents due to SD, aircraft’s systems have been developed, and SD training have been conducted. Terrain Awareness and Warning System (TAWS) provides pilots with visual and auditory warning. Automated Ground Collision Avoidance System (Auto GCAS) recovers flight attitude automatically when aircraft goes near into the ground. Spatial Orientation Retention Device (SORD) is multi-sensory warning system. Tactile Situation Awareness System (TSAS) gives vibration to the pilots to indicate pilot’s posture. Three Dimensional Landing Zone (3D-LZ) System projects view of landing zone to the cockpit even in bad weather. In this study, we collected information related to SD training among 21 military forces belong 17 countries. SD training usually includes lecture and experience learning. Pilots receive initial training and periodic training in 17/21 forces. Average frequency was 4 years (range: 6 months to 6 years). Japan Air Self-Defense Force has not conducted periodic SD training. The way of experience with SD is use of simulator similarly JASDF or in-flight demonstration. The simulator training is lower cost and safer than the in-flight training. To maintain and develop aircraft’s systems and SD training is continuously necessary.
著者
山口 大介 新谷 洋二
出版者
Japan Society of Civil Engineers
雑誌
土木史研究 (ISSN:09167293)
巻号頁・発行日
vol.19, pp.293-300, 1999-05-01 (Released:2010-06-15)
参考文献数
19
被引用文献数
1

城を構成するものには、天守・櫓・門・堀・土塁・石垣など様々なものがある。この中でも石垣は天守や櫓などの土台として、また城の防御の要として重要な役割を果たしてきた。石垣の施工上の留意点としては、安全性や耐久性、経済性などを十分に考慮しなければならない。また、使用される石材をみても一つとして同じ形状のものはなく、その材料をいかに組み合わせて堅固に築いていくかが重要である。本研究では、石垣を構成する石材の中でも築石に注目して、その形状や配置状況などについて、石垣の工事報告書などをもとに幾つかの城の石垣を例に取り、調査を行った。その結果、築石の配置状況はその加工の程度やその置き方によって左右されるのではないかと考察した。
著者
四十九院 仁子 四十九院 静子 山口 大介
出版者
日本食生活学会
雑誌
日本食生活学会誌 (ISSN:13469770)
巻号頁・発行日
vol.22, no.2, pp.159-165, 2011-09-30 (Released:2011-10-27)
参考文献数
12

Greek culture has had an enduring influence on the West⁄Western countries. There is an abundance of studies on ancient Greek language as well as philosophy and arts. However, there is comparatively very little reported on the topic of food culture, especially those related to the traditionally celebrated annual events. Therefore, we examined the Greek Orthodox Δωδεκαη´μερο to study the celebratory food culture among the people living in urban areas and in rural provinces of Greece.   The outcome of this study pointed out the following. In the urban areas there is a weakening of observances of traditional customs. This is likely due to diversification of life-style tends to change people′s sense of values. On the other hand, in the rural province, a traditional celebratory food,Kοτο´σουπα, has always been cooked for annual events. It became evident that food culture is influenced by the natural setting as well as by the religious environment that surround various groups of people.
著者
成澤 慶宜 水野 毅 高崎 正也 石野 裕二 原 正之 山口 大介
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.861, pp.17-00523-17-00523, 2018 (Released:2018-05-25)
参考文献数
17

A basic single-degree-of-freedom magnetic suspension system consists of one floator, one electromagnet and one amplifier. For multi-degrees-of-freedom control, multiple electromagnets and multiple amplifiers are necessary, which increases the cost of total system. As a means of overcoming this problem, parallel magnetic suspension has been proposed which controls multiple floators or multi-degree-of-freedom motions with a single power amplifier. In this system, all of the suspended points move simultaneously even when a disturbance acts on one of the suspended points solely because all electromagnet's coils are connected. This paper studies the moving direction of each suspended point with respect to a step disturbance in double parallel magnetic suspension system. The analytical study shows that the response direction is determined by the system parameter that relates the response speed of each subsystem. In the slower subsystem, the suspended point moves in the same direction as the applied force while in the faster subsystem, the suspended point moves in the opposite direction. In other words, the slower subsystem has positive stiffness while the faster system has negative stiffness. To confirm this prediction, step responses are measured in the experimental apparatus.
著者
石橋 尚宜 水野 毅 石野 裕二 髙﨑 正也 山口 大介 原 正之 渡邊 怜
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.83, no.849, pp.16-00404-16-00404, 2017 (Released:2017-05-25)
参考文献数
11
被引用文献数
2

This paper treats a relay-feedback mass measurement system that uses a relay with hysteresis and feeds back the velocity of the object. The measurement system has an on-off relay with hysteresis and switches force acting on the object in relation to its velocity. Such nonlinear control induces a limit cycle. The mass of the object is determined from the period of this cycle. In previous study, the actual trajectory of the limit cycle was different in shape from the theoretical one so that the prerequisites of the estimation formula were not satisfied. The delay of the velocity sensor is a main factor of such degradation. In this paper, the effect of the delay on mass estimation is investigated experimentally and analytically. In addition, an estimating equation including this effect is derived. Experimental result supports the validity of the derived estimating equation.
著者
本杉 日野 山本 恭久 鳴尾 高純 山口 大介
出版者
園芸学会
雑誌
Journal of the Japanese Society for Horticultural Science (ISSN:18823351)
巻号頁・発行日
vol.76, no.4, pp.271-278, 2007 (Released:2007-10-19)
参考文献数
30
被引用文献数
9

コルヒチン処理により作出したブドウ台木 ‘Riparia Gloire de Montpellier’(‘Gloire’, Vitis riparia Michx)および ‘Couderc 3309’(‘3309’, V. riparia × V. rupestris)の四倍体に接ぎ木した‘巨峰’(V. × labruscana Bailey × V. vinifera L.)ブドウ樹の成長と果実品質について,もとの二倍体台木に接ぎ木した‘巨峰’と比較した.組織培養により育成した台木と‘巨峰’を試験管内で接ぎ木し,発根させた.接ぎ木後の発根期間と順化期間において四倍体台木に接ぎ木した‘巨峰’は二倍体台木のものと比べ新梢長および節間長が短かかった.ポット育苗期において,四倍体台木における成長はもとの二倍体台木より弱くなる傾向が認められた.圃場定植後においても,四倍体台木に接ぎ木した‘巨峰’における主梢摘心後の副梢成長量,幹断面積および剪定枝重は二倍体台木と比べて小さくなった.四倍体台木に接ぎ木した‘巨峰’樹の果実は二倍体台木に比べ濃い着色を示した.