著者

飯田 裕康

出版者

慶應義塾大学

雑誌

三田評論 (ISSN:1343618X)

巻号頁・発行日

vol.977, pp.106-107, 1996-02-01

著者

飯田 裕康

出版者

The Japanese Society for the History of Economic Thought

雑誌

経済学史学会年報 (ISSN:04534786)

巻号頁・発行日

vol.35, no.35, pp.114-124, 1997 (Released:2010-08-05)

参考文献数

40

著者

飯田 裕康

出版者

The Japanese Society for the History of Economic Thought

雑誌

経済学史学会年報 (ISSN:04534786)

巻号頁・発行日

vol.30, no.30, pp.19-27, 1992 (Released:2010-08-05)

---

In this paper I consider some problems about non economic interests of David Ricardo that appear in his unpublished letter to Lady Mary Shepherd. Lady Mary is a minor figure in the history of economics. She was not an economist but a member of so called “bluestocking.” David Ricardo acquainted with her already in 1812, when they had an opportunity to discuss some academic or scientific topics, particularly astronomical problems.Ricardo wrote a letter to her on 6th Oct. 1819. The letter informed us now that he received an extract from a book by P. S. Laplace, French astronomer, from Lady Mary. He criticized Laplace's calculation of the precession of equinox from view point that it is necessary to distinguish the general outlook of universe from the observation.

著者

飯田 裕康

出版者

The Japanese Society for the History of Economic Thought

雑誌

経済学史学会年報 (ISSN:04534786)

巻号頁・発行日

vol.28, no.28, pp.46-47, 1990 (Released:2010-08-05)

著者

相田 慎一 飯田 裕康

出版者

The Japanese Society for the History of Economic Thought

雑誌

経済学史学会年報 (ISSN:04534786)

巻号頁・発行日

vol.18, no.18, pp.1-10, 1980 (Released:2010-08-05)

参考文献数

31

著者

飯田 裕貴子 吉川 徹

出版者

公益財団法人大原記念労働科学研究所

雑誌

労働科学 (ISSN:0022443X)

巻号頁・発行日

vol.90, no.2, pp.53-64, 2014 (Released:2016-01-25)

参考文献数

20

---

本研究では,呼吸用保護具の着用教育未経験者11名,着用教育経験者1名に折りたたみ式使い捨て呼吸用保護具を着用させ,着用方法の教育前後での全漏れ率を評価した。また,着用教育未経験者から観察された代表的な着用方法の間違いについて検討を行った。漏れ率の測定は米国労働安全衛生局の定量的フィットテスト手順に従い,測定器は労研式マスクフィッティングテスターMT-03™を使用した。着用方法の教育後,漏れ率の減少が確認された。また,着用時の動作よりも,着用教育の有無が漏れ率に大きく影響していた。代表的な着用方法の間違いとしては,折りたたみ面体を立体にしない,締め紐の位置不適切等が確認された。(図8,表4)

著者

小池 関也 小林 優揮 飯田 裕 下嶋 浩

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.67, no.654, pp.321-328, 2001-02-25

参考文献数

10

被引用文献数

2

---

This paper proposes an active noise controller applicable to a moving evaluation point in one dimensional acoustic field. A combined adaptive feedforward/feedback controller based on filtered-x LMS algorithm is proposed. The feedforward controller is utilized for the noise reduction, and the feedback controller is utilized for the reduction of howling, which occurs with use of acoustic reference signal at feedforward controller. For the sake of stable noise control under moving evaluation point, necessity for a real time identificator of transfer function of the error path, which uses a microphone fixed in the neighborhood of the control speaker, is shown. Stable noise reduction without howling is realized by using above combined controller and the real time identificator with use of acoustic reference signal aiming practical use. A straight duct is chosen as a one dimensional acoustic field. Computer simulations and experimental analyses are carried out to clarify the validity of the proposed controller.

著者

小池 関也 小林 優揮 飯田 裕 下嶋 浩

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 = Transactions of the Japan Society of Mechanical Engineers. C (ISSN:03875024)

巻号頁・発行日

vol.67, no.660, pp.2521-2527, 2001-08-25

参考文献数

13

被引用文献数

2

---

A basic noise control system applicable to a moving evaluation point was proposed in the previous report, and its effectiveness was examined numerically and experimentally. Although the results showed that the proposed system is effective, it can only handle the case of slow evaluation point velocity. This restriction seemed to be due to the slow convergent speed of the adaptive filter. In this paper the cause of restriction is examined in detail, and an advanced control system is proposed. The features of the proposed system are as follows : 1) Improved feedback controller where main filter is less affected by the movement of the evaluation point. 2) Introduction of IIR filter together with the learning identification method to the error path identifier. The new system is examined both in simulation and experiment and shows great improvement compared with the basic model.