著者

小林 康浩 大北 正昭 井上 倫夫

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. C (ISSN:03854221)

巻号頁・発行日

vol.96, no.8, pp.173-178, 1976-08-20 (Released:2008-12-19)

参考文献数

7

著者

上脇 憲冶 中原 光久

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.123, no.3, pp.176-176, 2003

著者

依田 育士 細谷 大輔 坂上 勝彦

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)

巻号頁・発行日

vol.124, no.3, pp.805-811, 2004-03-01

被引用文献数

9 11

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Dozens of people are killed every year when they fall off of train platforms, making this an urgent issue to be addressed by the railroads, especially in the major cities. This concern prompted the present work that is now in progress to develop a Ubiquitous Stereo Vision based system for safety management at the edge of rail station platforms. In this approach, a series of stereo cameras are installed in a row on the ceiling that are pointed downward at the edge of the platform to monitor the disposition of people waiting for the train. The purpose of the system is to determine automatically and in real-time whether anyone or anything is in the danger zone at the very edge of the platform, whether anyone has actually fallen off the platform, or whether there is any sign of these things happening. The system could be configured to automatically switch over to a surveillance monitor or automatically connect to an emergency brake system in the event of trouble.

著者

横山 明彦

出版者

The Institute of Electrical Engineers of Japan

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.125, no.3, pp.145-148, 2005-03-01

被引用文献数

21 22

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本記事に「抄録」はありません。

著者

池田 長康

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.114, no.12, pp.834-834, 1994

著者

朴 大欽 土井 雄介 石田 政義

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.131, no.7, pp.621-629, 2011-07-01

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So far, as a part of NaBH₄-H₂-Fuel Cell study we have been through optimization of hydrogen production reactor size and operating conditions to reach 100% of hydrogen production rate. Moreover, the potential of NaBH₄-H₂-Fuel Cells were verified by testing a 1000mL pressurebuffer for steady hydrogen supply under variable load conditions within maximum limit of 1.2kW. However, the buffer used gives rise to decreased energy density of the system due to its big size relatively to other components. Hence, minimized buffer volume under the limit of applied conditions is required to compact the system. In this study, the pressurebuffer volume which satisfies load following as well as compact size is found. Load following ability is approved as a result of hydrogen generation system operation, which has 325mL and 170mL buffer volume at 0°C and 20°C respectively within load variation of the average load 700W, peak load 1200W and 2 seconds of load cycle. Furthermore, NaBH₄-H₂-Fuel Cell's energy density is calculated. At last, all these come into the result that NaBH₄-H₂-Fuel Cell has high usefulnessas a high density mobile power source over 2.7kWh.

著者

渡辺 勝

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.129, no.3, pp.176-176, 2009

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本記事に「抄録」はありません。

著者

奥山 俊昭 藤本 登 松井 孝行 久保田 譲

出版者

The Institute of Electrical Engineers of Japan

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.107, no.2, pp.191-198, 1987

被引用文献数

8 11

著者

松原 裕之

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. A (ISSN:03854205)

巻号頁・発行日

vol.135, no.11, pp.679-685, 2015

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This paper discusses engineering ethics education as a way to enhance problem solving skills through group discussions. During group discussions, students are given a role to play in imaginary scenarios. The students hold discussions to work out the reasons for what went wrong in the imaginary scenarios. Once the causes are identified, the students design multiple solution strategies and devise short-term and long-term measures to be implemented. In order to encourage students to carry out discussions and devise solution strategies, we used two frameworks: Seven-step guide and 4M analysis. We have analyzed the correlation between the test scores in engineering ethics and the pre- and post- self-evaluation results, which were measured by the fundamental competencies for working persons. As a result, we conclude that the education is able to demonstrate an educational effect in terms of the development of communication and problem solving skills, it still leaves some issues to be resolved with regard to the students' ability to act and get things done.

著者

菅野 恵一

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.115, no.9, pp.590-590, 1995

著者

横塚 勉

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.98, no.2, pp.169-176, 1978-02-20 (Released:2008-12-19)

参考文献数

9

著者

高島 大 冨田 睦雄 陳 志謙 佐藤 光彦 道木 慎二 大熊 繁

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.123, no.6, pp.762-763, 2003-06-01

被引用文献数

1

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This paper proposes to paste non-magnetic materials on the rotor surface of a cylindrical brushless DC motor and to use the model including the extended e.m.f. for sensorless control. In the proposed method, the inductance changes depending on the rotor position because of eddy currents, which flow on the non-magnetic material at high frequency. The rotor position can be estimated at standstill and at low speeds. The simulation results show that the proposed method is very useful.

著者

伊東 圭昌 宮澤 以鋼 関口 隆

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.121, no.4, pp.461-467, 2001-04-01

被引用文献数

1

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Programmable Controllers (PCs) are widely applied in the control of manufacturing systems. The purpose of this paper is to give some basic concepts for the verification methods of sequential control systems. Especially, we propose the modeling method of Ladder Diagram (LD) with the cyclic scan of PC by Petri Nets (PNs). First, some experiments are conducted to examine the relationship between the cyclic scan and the behavior of LD. Second, PNs are used for the qualitative modeling of the behavior of LD, based on IEC61131-3. In addition to LD Boolean logic expressions, we consider the PC operation, described by the cyclic scan, peripherals, memories, scanning ladder rungs. As a result, the difference between the LD description and the behavior, caused by the cyclic scan, can be represented by the proposed PNs. Moreover, the behavior of the PNs can be analyzed by the firing sequences, and then confirmed in good qualitative agreement with that of the experimental results.

著者

淺倉 康二 中川 哲朗

出版者

The Institute of Electrical Engineers of Japan

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.125, no.5, pp.288-291, 2005-05-01

被引用文献数

1

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本記事に「抄録」はありません。

著者

湯浅 克也 鳥居 粛

出版者

The Institute of Electrical Engineers of Japan

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.125, no.12, pp.1047-1052, 2005-12-01

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This paper describes the novel scheme of the two-dimensional measurement of the surface magnetic flux density distribution of YBCO melt-processed bulk superconductor exposed in the alternatively changing field. It is well known that the surface flux density distribution is quite important to estimate the current density distribution inside the bulk and the position of the defect. Two-dimensional static field measurements are common and standard in these days, and one-dimensional dynamic ones are reported by many research groups. We tried to measure the two-dimensional dynamic distributions to obtain the further information on the superconducting bulk. The measurement system consists of ten Hall sensors located on straight line, which can be moved toward the perpendicular direction all together. The alternative magnetic field is applied by the external coil, and the sensors are moved in a way synchronized with the field. As the results, we obtain the two-dimensional dynamic surface flux density distribution of YBCO bulk. The specimen has several cracks on the surface, and we are able to find that some of them correspond to the irregular distribution of the results.

著者

浅岡 由伸 本山 英器 松原 広治 杉本 仁志

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.125, no.10, pp.979-987, 2005

被引用文献数

1 3

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Grounding resistance is one of the important parameters in the lightning-protection design of electric power systems. The grounding resistance of electrode decreases as large currents are injected to the electrode by electric discharges in soil. This characteristic is not considered in lightning protection design. Therefore, the design level is kept on the exceeding level in actual phenomena. From viewpoint of the rational lightning protection design for the electric power systems, this characteristic should be considered in practical design. In this study, experiments were conducted using rod electrodes, and the physical phenomena of the electrical discharge in soil were considered by assuming a certain electrical discharge model in soil. Based on these results, a grounding resistance large-current characteristic analysis model that could be easily used in EMTP was developed.

著者

須貝 太一 鈴木 智哉 南谷 靖史 能勢 泰祐

出版者

The Institute of Electrical Engineers of Japan

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.131, no.5, pp.401-407, 2011-05-01

被引用文献数

3 1

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In this study, we investigated a water treatment method spraying the droplets of wastewater into pulse discharge space. The water treatment was carried out by applying voltage with different pulse widths to determine the optimum pulse width, and the optimum pulse voltage determined on the basis of the results of the study was analyzed. The rise time of the voltages with pulse widths of 40, 60, and 80 ns was about 12, 19, and 32 ns, respectively, and the discharge current in the case of the faster rise time was higher. The number of streamer discharges is believed to increase with a decrease in the rise time. The energy efficiency in the case of the pulse width of 40 ns is higher than that in the case of the other pulse widths. This is because almost all of active species are generated by early streamer discharge, and longer discharging time by longer pulse width makes more ineffectual energy by thermal loss. These results show that the pulsed voltage of faster rise time and shorter pulse width is optimum for the treatment.

著者

田中 成志 原田 幸夫 和田 裕一 矢島 明夫 田中 洋

出版者

The Institute of Electrical Engineers of Japan

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.118, no.1, pp.42-45, 1998-12-20

著者

金子 双男 横山 浩

出版者

The Institute of Electrical Engineers of Japan

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.1, pp.39-44, 1994-01-20

被引用文献数

2

著者

姉崎 隆 タンスリヤボン スリヨン 山田 親稔 平田 哲兵 玉城 史朗 加藤 浩

出版者

The Institute of Electrical Engineers of Japan

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.135, no.2, pp.74-80, 2015

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In order for the Okinawan economy to grow independently, creating new businesses is essential. This will require the cultivation of technologies that will form the seeds of those businesses as well as the training of technicians and researchers.  To promote the creation of new businesses and innovation that are "unique to Okinawa," the Institute of Electrical Engineers of Japan set up a cooperative research committee for Okinawa-style robot-embedded/sustainable systems.  We proposed the concept of Okinawa-style robot-embedded systems. To realize this concept, we organized technical meetings and promoted research on this topic. At present, our research is focused on the development of ① a playback-type navigation robot for land and air, ② the learning-based super resolution (LBSR) method and hardware implementation for Bilateral Filter (BF), ③ a goat information and communication technology (ICT), and ④ the Bone Cloud for planning and verifying 3D bone models without performing a surgical procedure. Our promotions are now ongoing.