著者
佐藤 太一 河野 達仁 越村 俊一 山浦 一保 今村 文彦
出版者
地域安全学会
雑誌
地域安全学会論文集 (ISSN:13452088)
巻号頁・発行日
no.10, pp.393-400, 2008-11

Many evacuation simulation models have been developed. However, all the models exogenously set the rate of evacuation and the evacuation route which are inherently determined by residents. With the exogenous settings, these models can not follow the change in the residents' behavior according to changes in policies. Therefore, it is necessary to model residents who evacuate based on their individual rationality. And now, it is known in particular that residents will not evacuate by some psychological factors (e.g. cognitive dissonance). This paper, focusing on cognitive dissonance as psychological factors, constructs an evacuation model incorporating individual rationality and cognitive dissonance. As a result, we show the effects of cognitive dissonance on the residents' evacuation.
著者
小川 侑一 松村 茂樹 北條 春夫 佐藤 太一 梅澤 清彦
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. C編 (ISSN:03875024)
巻号頁・発行日
vol.65, no.634, pp.2486-2493, 1999-06-25
参考文献数
8

This paper proposes a simulator which can depict the rotational vibration of a spur gear having any types of tooth surface deviation including both tooth profile deviations and tooth helix deviations. The developed simulator is based on a single degree of freedom motion system constructed with equivalent mass, damping and mesh stiffness of a pair of gears. The mesh stiffness is calculated considering the effect of the tooth helix deviation which brings non uniform load distribution along the contact line of a tooth pair. The dynamic load tests have been performed to verify the simulator changing both helix slope deviation of driven gear and torque. The analytical results under each operating conditions are in good agreement with experimental results. Also, the damping ratio of the test gear system is evaluated as 0.03 with measured vibration responses, which is smaller than conventional expectation value of 0.07.
著者
木原 康之 鈴木 達也 菅野 貴皓 深尾 隆則 津坂 優子 札場 勇大 佐藤 太一 横小路 泰義
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C編 (ISSN:18848354)
巻号頁・発行日
vol.79, no.803, pp.2362-2372, 2013 (Released:2013-07-25)
参考文献数
13

We have already proposed the method to transfer human skill to a robot through direct teaching. By using the method, we can automatically extract human skill including sensory feedback to adapt to environmental variation. However, we have not discussed what trajectory is robust against environmental variation. In this paper, we discuss the robustness condition of robot trajectories against environmental variation and how to derive the robust trajectory. We propose a method to determine whether a trajectory is robust or not. The method considers the probability of the environment variation uses the parameter space expression of trajectory in order to derive the robustness condition. We confirm the effectiveness of the proposed method through a case study on a typical assembly task, peg-in-hole.
著者
加藤 岳人 七野 滋彦 佐藤 太一郎 秋田 幸彦 河野 弘 梛野 正人 金井 道夫 三浦 由雄 片山 信 山本 英夫
出版者
一般社団法人日本消化器外科学会
雑誌
日本消化器外科学会雑誌 (ISSN:03869768)
巻号頁・発行日
vol.16, no.4, pp.735-739, 1983-04-01
被引用文献数
19

鈍的腹部外傷による小腸・腸間膜損傷の病型は,破裂・断裂・挫傷の3型に分類される.腸管の破裂や断裂は遅発性のものを除けば診断は比較的容易で,多くは開腹に至り救命しうる.一方,挫傷は症状も軽微で何らの後遺症も残さず治癒することが多い.しかしまれな合併症として遅発性穿孔や腸狭窄をきたす場合がある.今回われわれは外傷性小腸狭窄を呈した2症例を経験し,術前診断が可能であったので文献的考察を加えて報告する.
著者
田中 基八郎 松原 謙一郎 佐藤 太一
出版者
一般社団法人日本機械学会
雑誌
日本機械学會論文集. C編 (ISSN:03875024)
巻号頁・発行日
vol.61, no.592, pp.4730-4735, 1995-12-25
被引用文献数
16

Strange sounds generated by machines express trouble or poor condition of the machines. Especially, in automobiles and air conditioners, strange sounds are paid attentions carefully, and the sources of those sounds are investigated and improved. To express strange sounds in Japanese, many kinds of onomatopoeia are used. Onomatopoeia is characteristic of Japanese culture. In this paper, the relationship between onomatopoeia expressing impulsive sounds and beat sounds, and the real sounds of the phenomena, are studied from the viewpoint of acoustic physics.
著者
大野 麻里恵 佐藤 太一 田中 基八郎
出版者
一般社団法人日本機械学会
雑誌
評価・診断に関するシンポジウム講演論文集
巻号頁・発行日
vol.2004, no.3, pp.29-32, 2004-12-15
被引用文献数
1

Strange sounds generated by machines are expressed by onomatopoeia. And onomatopoeia expresses trouble or poor condition of the machines. Especially, many kinds of onomatopoeia are used for expressing strange sound of automobiles, and the relationship between onomatopoeia and the sources of strange sound is reported. In this study application of onomatopoeia for expressing strange sound is discussed. Onomatopoeia is language which people utter. Therefore it is necessary to clarify the relationship between the frequencies perceived to sound like the onomatopoeic word and uttered sounds. In this report, we paid attention to both the vowel and the consonant of uttered sound of onomatopoeia. As a result we found that the utterance time of a consonant changes by the mechanism of utterance. And the ratio of energy between the vowel and the consonant influences frequency of the sound that an onomatopoeia expresses.
著者
佐藤 太一 尾山 敬一 小林 春美 田中 基八郎
出版者
一般社団法人日本機械学会
雑誌
IIP情報・知能・精密機器部門講演会講演論文集
巻号頁・発行日
vol.2005, pp.320-325, 2005-03-21
被引用文献数
1

We have performed basic experiments for the purpose of applying onomatopoeia to engineering problems. In these experiments, test subjects were made to perform lifting actions while listening to onomatopoeic utterances. We thereby demonstrated that there is a relationship between the onomatopoeic utterances and the lifting forces exerted by the test subjects. We examined how the lifting forces are related to the magnitude of the onomatopoeic utterances and the envelope of these sounds. Furthermore, by comparing this phenomenon with the effects of simple tones and white noise, we investigated how the lifting force is affected depending on whether or not emotion is expressed when uttering the onomatopoeia.
著者
佐藤 太一郎 山田 吉英 渡辺 旦 亀田 武志
出版者
一般社団法人電子情報通信学会
雑誌
電子情報通信学会技術研究報告. EMCJ, 環境電磁工学 (ISSN:09135685)
巻号頁・発行日
vol.106, no.182, pp.35-39, 2006-07-20

近年,モーメント法(MoM)に基づく電磁界シミュレーターは,高速多重極法(FMM)を使用することで計算能力が大幅に向上し,大形構造物の解析が可能となった.本報告では,ステルス戦闘機の1/48のスケールモデルを用いて,レーダー断面積(RCS)の検討を行った.周波数60GHzにおいて,電磁界シミュレーション値と簡易測定値を求めて比較した.スケールモデルの寸法は約80波長であり,計算時のメモリー容量は1.9GBで,計算時間は2時間程度であった.測定は電波暗室を用い,ほぼ遠方界領域で行った.測定器の性能から,ダイナミックレンジは不十分であり,RCSの大きくなる部分の比較しかできなかった.計算値と測定値は良い対応を示し,データの信頼性を確認できた.