著者

谷本 能文 泉 俊輔 古田 耕一 鈴木 友恵 藤原 好恒 平田 敏文 山田 外史 伊藤 喜久男

出版者

社団法人 環境科学会

雑誌

環境科学会誌 (ISSN:09150048)

巻号頁・発行日

vol.13, no.1, pp.61-67, 2000-02-29 (Released:2011-03-01)

参考文献数

19

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ミドリムシに対する強磁場の影響について研究した。生きているミドリムシは,水平方向の勾配強磁場(380T2m-1)中では,高磁場方向に移動する(正の走磁性)。一方,EDTAで殺したミドリムシは,低磁場側に集まった。8Tの均一磁場では走磁性は見られなかった。強磁場中のミドリムシの顕微鏡観察の結果,ミドリムシは磁場とほぼ垂直方向に配向して泳ぎ,また殺したミドリムシも磁場配向していた。ミドリムシの正の走磁性は,ミドリムシの磁場配向とミドリムシにかかる不均一な磁気力の2つを考慮することにより説明された。

著者

西村 貴士 林 晃平 山田 外史 岩原 正吉

出版者

公益社団法人 日本磁気学会

雑誌

日本応用磁気学会誌 (ISSN:02850192)

巻号頁・発行日

vol.30, no.3, pp.387-390, 2006 (Released:2007-02-21)

参考文献数

7

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It is important to understand leakage magnetic fields surrounding magnetic machines and devices for facilitation of development and evaluating the environmental effects of the magnetic field level to determine whether it conforms to the EMC guideline. The magnetic projection method is a measurement technique that can detect a leakage magnetic field by means of a simple probe. The principles of 2-D magnetic field measurement and reconstruction have been previously reported. This paper proposes the principles of a spherical magnetic projection method, and reports on an experiment carried out to observe the overall leakage magnetic field around a sample object. As a result, it is shown that the projection method can easily measure and visualize a magnetic field on a spherical surface with good accuracy.

著者

山田 外史

出版者

IEEE

雑誌

IEEE Sensors Journal (ISSN:1530437X)

巻号頁・発行日

vol.7, no.3, pp.401-408, 2007-03

被引用文献数

34

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Cancer is the most deadly disease in the world today. There is a variety of different treatment methods for cancer, including radiotherapy and chemotherapy with anticancer drugs that have been in use over a long period of time. Hyperthermia is one of the cancer treatment methods that utilizes the property that cancer cells are more sensitive to temperature than normal cells. The control of temperature is an important task in achieving success using this treatment method. This paper reports the development of a novel needle-type nanosensor based on the spin-valve giant magnetoresistive (SV-GMR) technique to measure the magnetic flux density inside the body via pricking the needle. The sensor has been fabricated. The modeling and experimental results of flux density measurement have been reported. From the information of flux density, the temperature rise can be estimated to permit the delivery of controlled heating to precisely defined locations in controlled hyperthermia cancer treatment. The actual experiment with human is under investigation. © 2007, IEEE. All rights reserved.Proceedings of the 1997 2nd International Conference on Power Electronics and Drive Systems, PEDS. Part 2 (of 2); Singapore, Singapore; ; 26 May 1997 through 29 May 1997; Code 47014