著者

古閑 康裕 勝木 淳 末田 毅 秋山 秀典 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集. 秋の分科会

巻号頁・発行日

vol.1996, no.4, 1996-09-13

著者

秋山 秀典 原 雅則

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.115, no.3, pp.164-169, 1995-02-20 (Released:2008-04-17)

参考文献数

2

著者

塚本 俊介 前田 貴昭 池田 元吉 秋山 秀典

出版者

The Japan Society of Plasma Science and Nuclear Fusion Research

雑誌

プラズマ・核融合学会誌 = Journal of plasma and fusion research (ISSN:09187928)

巻号頁・発行日

vol.79, no.1, pp.39-42, 2003-01-25

被引用文献数

7 7

---

Pulsed high voltage was applied to logs used for mushroom culturing to mushroom growth. An experiment was carried out in an attempt to increase shiitake mushroom yield. Results showed that the weight of shiitake mushroom yield was double that of a normal group cropped in a month. Another experiment was performed to estimate the effect of electrical stimulation on the growth of hyphae. Results of that experiment showed a slight influence on the growth of hyphae, and showed some possibilities this method can improve mushroom culturing techniques.

著者

江口 倫史 勝木 淳 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集. 秋の分科会

巻号頁・発行日

vol.1993, no.4, 1993-09-20

著者

塚本 俊介 前田 貴昭 池田 元吉 秋山 秀典

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.79, no.1, pp.39-42, 2003 (Released:2005-09-28)

参考文献数

8

被引用文献数

5 7

---

Pulsed high voltage was applied to logs used for mushroom culturing to mushroom growth. An experiment was carried out in an attempt to increase shiitake mushroom yield. Results showed that the weight of shiitake mushroom yield was double that of a normal group cropped in a month. Another experiment was performed to estimate the effect of electrical stimulation on the growth of hyphae. Results of that experiment showed a slight influence on the growth of hyphae, and showed some possibilities this method can improve mushroom culturing techniques.

著者

副島 通邦 江口 倫史 勝木 淳 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集. 年会

巻号頁・発行日

vol.49, no.4, 1994-03-16

著者

勝木 淳 末田 毅 古関 康裕 秋山 秀典 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集. 秋の分科会

巻号頁・発行日

vol.1995, no.4, 1995-09-12

著者

勝木 淳 山田 智博 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

秋の分科会講演予稿集

巻号頁・発行日

vol.1992, no.4, 1992-09-14

著者

勝木 淳 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

春の分科会講演予稿集

巻号頁・発行日

vol.1991, no.4, 1991-03-11

著者

勝木 淳 末田 毅 秋山 秀典

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) (ISSN:03854205)

巻号頁・発行日

vol.117, no.9, pp.962-970, 1997-08-20 (Released:2008-07-15)

参考文献数

18

被引用文献数

1

---

Railguns are facilities to accelerate projectiles up to several km/s by the electromagnetic force due to a driving current. A variety of current waveforms are used for railguns developed in the world This paper describes the dependence of a railgun operation on a rising rate of the driving current. The use of the exploding wire as an opening switch enables to change the rise time of the driving current. A secondary arc is likely to appear and the erosion on a rail surface is more severe when the current with a short rise time is used. According to the non-dimensional railgun plasma simulation, the current with a short rise time heats up the plasma so fast that plenty of particles ablated from the bore surface, which seem to be the cause of the secondary arc, increase rapidly in the early phase of acceleration.

著者

秋山 秀典 寺本 明美 小薗 和剛

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.126, no.8, pp.782-788, 2006 (Released:2006-11-01)

参考文献数

11

被引用文献数

2 3

---

A conventional lecture on Laser Engineering had been done in a lecture room till 1999. A content using on-demand streaming method was made for an online lecture of Laser Engineering in 2000. The figures and equations used on the conventional lecture and the voice recorded for the online lecture were converted to the real media. Then an online lecture has been provided to students by using a Helix Universal Server. The trial of the online lecture was done only for the students who wanted to take the online lecture course in 2000. The online lectures have been recognized as the credits for graduation by the change of a law since 2001. About 100 students have registered the online lecture of Laser Engineering every year since 2001. Here, three years' questionnaire surveys of the online lecture are summarized, and results of examinations on the conventional lecture for two years and on the online lecture for three years are compared. It is recognized for the lecture of Laser Engineering that the educational effect of the online lecture is comparable to or better than that of the conventional lecture.

著者

Kiyan Tsuyoshi Takade Maya Namihira Takao Hara Masanori Sasaki Mitsuru Goto Motonobu Akiyama Hidenori キヤン ツヨシ タカデ マヤ ナミヒラ タカオ ハラ マサノリ ササキ ミツル ゴトウ モトノブ アキヤマ ヒデノリ 喜屋武 毅 高出 麻耶 浪平 隆男 佐々木 満 後藤 元信 秋山 秀典

出版者

Institute of Electrical and Electronics Engineers

雑誌

IEEE transactions on plasma science

巻号頁・発行日

vol.36, no.3, pp.821-827, 2008-06

被引用文献数

4 33

---

This paper deals with the effect of the polarity and gap geometry on dc breakdown voltage characteristics of a pointto-plane gap in supercritical carbon dioxide (SC CO2) that is required to design a plasma reactor. In the experiments, the gap width d and the curvature radius of the point tip r were changed in the range of 80 to 300 μm and 50 to 170 μm respectively,and the CO2 state was controlled within the gas, liquid, and SC phases. The experimental results showed that a remarkable polarity effect appeared under certain gap conditions. As a result, it was found that negative polarity and a higher stressed electrode are desired conditions for the dc plasma reactor since an active corona supplying rich chemical radicals appears in SC CO2 under such conditions.

著者

Namihira Takao Tsukamoto Shunsuke Wang Douyan Hori Hideo Katsuki Sunao Hackam Reuben Akiyama Hidenori Shimizu Masaru Yokoyama Kenichi ナミヒラ タカオ ツカモト シュンスケ ホリ ヒデオ カツキ スナオ アキヤマ ヒデノリ シミズ マサル ヨコヤマ ケンイチ オウ トエン 浪平 隆男 勝木 淳 秋山 秀典 王 斗艶

出版者

Institute of Electrical and Electronics Engineers

雑誌

IEEE TRANSACTIONS ON PLASMA SCIENCE

巻号頁・発行日

vol.29, no.4, pp.592-598, 2001-08

被引用文献数

8 49

---

A short duration of 100-ns pulsed power has been used to remove nitric oxide (NO) in a mixture of nitrogen, oxygen, water vapor, and NO, simulating flue gases from a power station. The effects of the gas flow rate, the reactor length, and the pulse repetition rate on the percentage of NO removal and its energy efficiency are reported. The percentage of NO removal at a fixed gas flow rate increased with increasing pulse repetition rate due to the increased energy into the discharge. At a fixed pulse rate, the removal of NO increased with decreasing gas flow rate due to the increased residence time of the gas in the discharge reactor, thus facilitating the creation of increased radicals of O and N which then decreased NO. The energy removal efficiency of NO (in mol/kWh) decreased with increasing gas flow rate and increasing removal ratio of NO. The removal of NO increased with increasing energy density (J/I) input into the discharge at different reactor length.

著者

Wang Douyan Jikuya Manabu Yoshida Seishi Namihira Takao Katsuki Sunao Akiyama Hidenori オウ トエン ジクヤ マナブ ヨシダ セイシ ナミヒラ タカオ カツキ スナオ アキヤマ ヒデノリ 王 斗艶 軸屋 学 吉田 政史 浪平 隆男 勝木 淳 秋山 秀典

出版者

Institute of Electrical and Electronics Engineers

雑誌

IEEE transactions on plasma science

巻号頁・発行日

vol.35, no.4, pp.1098-1103, 2007-08

被引用文献数

6 80

---

A Blumlein generator that has a pulsewidth of 100 nswas used to investigate the process of streamer discharge propagationin a coaxial cylindrical reactor using a streak camera. Bothpositive and negative polarities of the streamer discharges wereperformed in air at atmospheric pressure. The results showed thatthe primary and secondary streamers propagated with increasingvelocity from the central rod to the outer cylinder electrode inboth positive and negative polarities of applied voltages to the rodelectrode. The propagation velocity of the streamer heads was inthe range of 0.8–1.2 mm/ns for a positive peak applied voltage inthe range of 43–60 kV and 0.6 mm/ns for a negative peak appliedvoltage of−93 kV, respectively. The electric field at streamer onsetwas calculated to be 12 and 20 MV/m for positive and negativeapplied voltages, respectively

著者

勝木 淳 前田 定男 秋山 秀典 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

秋の分科会講演予稿集

巻号頁・発行日

vol.1990, no.4, 1990-09-12

著者

勝木 淳 末田 毅 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集. 年会

巻号頁・発行日

vol.50, no.4, 1995-03-16

著者

勝木 淳 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

年会講演予稿集

巻号頁・発行日

vol.46, no.4, 1991-09-12

著者

勝木 淳 末田 穀 秋山 秀典

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集 (ISSN:13428349)

巻号頁・発行日

vol.52, no.1, 1997-03-17

著者

勝木 淳 江口 倫史 末田 毅 秋山 秀典 前田 定男 佐藤 浩之助

出版者

一般社団法人日本物理学会

雑誌

日本物理学会講演概要集. 年会

巻号頁・発行日

vol.49, no.4, 1994-03-16