著者

荒川 貴博 飯谷 健太 當麻 浩司 三林 浩二

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.140, no.11, pp.321-327, 2020-11-01 (Released:2020-11-01)

参考文献数

21

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The human body emits various volatile molecules, depending on a person's genetics, stress, disease and so on. The volatile organic compounds (VOCs) can be found in human transpiration, breath and transdermal gas emanated from skin. In this review, a biochemical gas sensor “bio-sniffer” and a gas imaging system “sniff-cam” for monitoring of VOCs such as acetone, ethanol and acetaldehyde were presented. Firstly, a high-sensitive acetone biochemical gas sensor was demonstrated and measure exhaled breath acetone concentration, and assess lipid metabolism based on breath acetone analysis. Secondly, a fluorometric imaging system for ethanol vapor released from human breath and palm skin was presented. This imaging system measures ethanol vapor concentrations as intensities of fluorescence through an enzymatic reaction. These biochemical gas sensors and imaging system of VOCs showed a rapidly and accurately responses and measurement, which could lead an analysis to metabolism function and non-invasive screening at real time in the near future.

著者

梶家 治

出版者

一般社団法人 電気学会

雑誌

電気学会誌 = The journal of the Institute of Electrical Engineers of Japan (ISSN:13405551)

巻号頁・発行日

vol.114, no.11, pp.719-722, 1994-11-20

参考文献数

3

被引用文献数

3

著者

児玉 浩憲

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.137, no.10, pp.671, 2017

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<p>ノーベル賞受賞者が発表される10月がやってきた。昨年は東京工業大学の大隅良典・栄誉教授が「オートファジー(自食作用)の仕組み解明」で医学生理学賞を受賞,これで日本人のノーベル賞理系3賞の受賞者は合</p>

著者

山沢 清人

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.140, no.11, pp.713-715, 2020-11-01 (Released:2020-11-01)

参考文献数

8

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1.はじめに10年程前から大学教育で重視されてきた「初年次教育(First Year Experience(初年次体験)」(1)は学問的・知的能力の発達,人間関係の確立と維持,アイデンティティの発達,キャリアと人生経験,肉体的・精神的健康の保持,人生観の確立など大学における教育上の目標と学生の個人

著者

佐藤 之彦

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.140, no.11, pp.709-712, 2020-11-01 (Released:2020-11-01)

参考文献数

5

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1.はじめにJABEE(日本技術者教育認定機構)は,1999年11月19日に設立され,2001年度より技術者教育プログラムの認定を開始して現在に至っている。2019 年度までに,累計で173教育機関の510プログラムが認定を受け,これらの認定プログラムの修了生は延べ30万人以上に達している。

著者

中村 貴弘 早川 正士

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.124, no.8, pp.1012-1020, 2004 (Released:2004-11-01)

参考文献数

17

被引用文献数

2 3

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Mesospheric optical phenomena(including sprites) are becoming an interesting subject from the standpoint of atmosphere-ionosphere coupling. This paper deals with our observation of sprites associated with winter thunderstorms in the Hokuriku area and we show the characteristics of those sprites and their parent lightning discharges. Although the scale of Japanese lightning in winter is very small as compared with the MCS (Mesoscale Convective System) for the summer continental lightning, the essential quantities (polarity, charge transfer etc.) are found to be nearly the same as those for those MCS. However, there might be required an additional factor, such as the self-organization of the lightning.

著者

辻本 富幸 中出 雅彦 八木 幸弘 石井 登

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.125, no.12, pp.1237-1244, 2005 (Released:2006-03-01)

参考文献数

14

被引用文献数

4 5

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Water tree is one of the degradation aspects of XLPE cables used for under-ground distribution or transmission lines. We have developed the loss current method using 3rd harmonic in AC loss current for cable diagnosis. Harmonic components in loss current arise as a result of the non-linear voltage-current characteristics of water trees. We confirmed that the 3rd harmonic in AC loss current had good correlation with water tree growth and break down strength. After that, we have applied this method to the actual 66kV XLPE cable lines. Up to now, the number of the application results is more than 120 lines.In this method, it is sometimes said that the degradation signal (3rd harmonic in loss current) is affected by the 3rd harmonic in the test voltage. To indicate and solve this problem, we investigated the extent of influence by 3rd harmonic in the test voltage, and found the rule of the influence. As a result, we developed a new technique of harmonic-noise reduction in loss current method that enabled a more highly accurate diagnosis and confirmed the effectiveness of this new technique by simulations and experiments with actual cables.

著者

松村 太陽 小野 隆

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society (ISSN:03854205)

巻号頁・発行日

vol.132, no.10, pp.893-900, 2012-10-01

参考文献数

6

被引用文献数

1

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At present, there are a variety of measures that are being taken in the face of the lengthening of level crossing closure times, but since these all rely on the intermittent detection of the location and speed of the train, they have not yet shown sufficient effectiveness. Against this backdrop, we will show in our simulation and experimental result the use of inductive wires to continuously detect the location of the train, while also outlining the crossing warning time control system, and how the application of this system. In this paper, warning time optimum control for level crossing with a continuous type train location detector using crossed inductive wires will be proposed and its effect to shorten crossing warning times will be discussed. And we have also confirmed the feasibility of the bidirectional information flow method. As a result, we have demonstrated that the proposed method is effective in delaying the timing of the initiation of warning and it is applicable to a high speed train.

著者

熊澤 孝夫 中川 渡 鶴丸 秀一

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.125, no.10, pp.828-834, 2005

被引用文献数

6 9

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Bow-tie tree(BTT) generated from contaminant, <i>e.g.</i>, metal, carbon, amber(over cured resin) or void is a deterioration factor of XLPE cable. In particular, BTT in contact with inner or outer semi-conductive shield could significantly lower residual AC breakdown voltage of HV power cable. To evaluate influence of water and ion diffusion on generation and progress of BTT, we investigated relationship between water content of XLPE and the generation of BTT by various accelerated aging. The number of BTT in XLPE samples with accelerated aging under open condition, involving evaporation of water in which samples were immersed, was very large compared with closed condition. Furthermore, when samples were intermittently immersed in water, the number of BTT in samples was large compared with samples immersed continuously. In these experiments the generation of BTT seemed to have nothing to do with changes in water content before and after accelerated aging. Therefore, it was suggested that diffusion of ions rather than water in XLPE played an important role in the generation of BTT.

著者

今村 光良 中川 慧 吉田 健一

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.138, no.8, pp.992-998, 2018-08-01 (Released:2018-08-01)

参考文献数

14

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Various methods to predict stock prices have been studied. In a linked paper, we propose a stock price prediction method that applies DTW on scaled daily stock price patterns. We showed its performance using TOPIX data. In this paper, we further analyze the effectiveness of the proposed method using other price indexes, such as the S&P 500, CAC40, DAX, FTSE100, foreign exchange rates, and Cryptocurrency. This paper also reports the importance of pattern length and starting points of patterns. We also discuss the hidden behavior of investors which seems to explain the prediction ability of the proposed method.

著者

加藤 宏和 佐藤 賢司

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.140, no.5, pp.349-355, 2020

被引用文献数

1

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<p>This paper presents a new battery self-traction system for high-speed trains. We developed an SiC applied traction system for the latest Shinkansen train, Series N700S. The developed system is so compact and lightweight that it saves space and weight, which can be used for new equipment under the floor of the car body. Utilizing the released space and weight, we started developing a novel battery system for traction to use in case of power failure of the catenary. This is the first battery self-traction system for high-speed trains in the world. In this paper, we introduce the design philosophy and procedures and discuss the results of the running tests.</p>

著者

衡田 正吉 幸村 明憲

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.126, no.7, pp.443-446, 2006-07-01 (Released:2007-02-06)

参考文献数

5

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本記事に「抄録」はありません。

著者

沼野 稔夫 仲津 英治 木俣 政孝

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.114, no.6, pp.608-611, 1994

被引用文献数

1 1

著者

青木 恭弘

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.123, no.4, pp.216-219, 2003-04-01 (Released:2008-04-17)

参考文献数

9

著者

浅野 尚

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.101, no.9, pp.851-854, 1981-09-20 (Released:2008-04-17)

参考文献数

7

著者

岩澤 永照 羽田 明生 流王 智子 川村 智輝 川﨑 邦弘

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)

巻号頁・発行日

vol.138, no.12, pp.547-557, 2018-12-01 (Released:2018-12-01)

参考文献数

14

被引用文献数

1

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In this paper, we propose a method of construction of inter-vehicle network for coupling and decoupling vehicles. First, we describe the problems associated with construction of inter-vehicle network. Second, we propose two sequences of procedures how to solve these problems by grasping the connection matrix. Finally, we show the prototypes to which the method is applied, and we perform the test for function confirmation and evaluation of the method.

著者

藤崎 敬介 玉木 輝幸 安廣 祥一

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. A, 基礎・材料・共通部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society (ISSN:03854205)

巻号頁・発行日

vol.129, no.11, pp.821-826, 2009-11-01

参考文献数

25

被引用文献数

2 1

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The three-dimensional polycrystal magnetic field analysis method is compared with the distributed magnetic measurement. In the three-dimensional polycrystal magnetic field analysis method, the local coordinates are fixed in each crystal grain and the global coordinates are defined in the polycrystal steel. It is assumed that each crystal grain has the same magnetic characteristics as those of a single crystal grain. When it is applied to the real grain oriented (GO) steel with two crystal grains and with 56 crystal grains in 80-mm &times; 80-mm, and with 0.35 mm thick, their results of the magnetic flux density distribution and the inclination angle are mainly explained by &alpha; angle distribution of the polyctristal steel and seem to be in good agreement.

著者

堀越 力

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.127, no.9, pp.597-599, 2007-09-01 (Released:2007-09-05)

参考文献数

8

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本記事に「抄録」はありません。

著者

澁澤 元治

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.20, no.149, pp.875-932, 1900

著者

丹野 頼元

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.86, no.938, pp.1910-1918, 1966-11-01 (Released:2008-04-17)

参考文献数

8