巻号一覧
前身誌
129 巻, 3 号
選択された号の論文の9件中1～9を表示しています
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解説
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山寺 秀哉2009 年 129 巻 3 号 p. 113-116
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーA Magneto-Impedance (MI) effect which exhibited the strong dependence of impedance on external magnetic field was found in amorphous wire by Mohri et.al. fifteen years ago. The magneto-impedance (MI) sensors were developed as a new magnetic field detection principle and achieved to magnetic sensors and strain sensors with high performance. In this review, we describe the layered thin film MI elements and the high resolution sensing of magnetic field and strain utilizing them.抄録全体を表示PDF形式でダウンロード (343K)
論文
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劉 斌, 宮下 善郎, 稲葉 次紀2009 年 129 巻 3 号 p. 117-122
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーFigure modes of Ar torch plasmas with an air cross wind were investigated. In fact, torch plasmas resemble “bamboo” with a low velocity cross wind; they revert to their original position when the low cross wind is removed. Torch plasmas have abundant elasticity; their Young's modulus has been calculated using measured deflection figures on the anode. Adopting the influence factors as the plasma current, the velocity of cross wind and the outside electrode interval, those influence on the figure modes and its Young's modulus was investigated. The Young's modulus increases to the 0.67th power of the plasma current.抄録全体を表示PDF形式でダウンロード (731K) -
飯塚 智徳, 内田 克己, 田中 祀捷2009 年 129 巻 3 号 p. 123-129
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーTwo kinds of epoxy/silica nanocomposites, i.e. Aerosil and Nanopox specimens, were prepared to clarify the effect of nano-filler dispersion and of coupling agents on electric field endurance. According to SEM observation, nano-fillers were well dispersed in the former specimens, while some agglomeration was found in the latter specimens. This difference caused different characteristics for PD resistance and treeing resistance. PD resistance was improved only by adding nano-fillers, and treeing resistance was improved not only by adding nano-fillers but must by making nano-fillers uniformly dispersed. Coupling agents were also effective in treeing resistance in both kinds of specimens. It was then clarified that nano-fillers and coupling agents could improve PD and treeing resistance, but that treeing resistance could be upgraded or degraded depending on the level of nano-filler dispersion.抄録全体を表示PDF形式でダウンロード (3512K) -
小山 潔, 星川 洋, 左近 敏和2009 年 129 巻 3 号 p. 130-138
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーThe present paper describes an investigation conducted on metal detection with a scanning probe. The authors applied a rotating magnetic field probe to metal detection. The rotating magnetic field probe is composed of two vertically placed rectangular exciting coils and a circular detecting coil. The experimental results confirmed that the probe can detect metal objects and provide more information about their shape, direction, and electromagnetic characteristics than conventional metal detector probes. A two-dimensional signal display shows a blurred image of the metal object and the signal phase indicates the object's direction and electromagnetic characteristics. The experimental results showed that excellent restoration of the surface shapes of metal objects can be obtained for both magnetic and nonmagnetic metals under present conditions. There is also a possibility that the rough shape of a metal object can be estimated from the restored image.抄録全体を表示PDF形式でダウンロード (1955K) -
森 啓, 堀内 崇, 水町 学, 情野 哲史, 中川 卓哉, 鈴木 薫2009 年 129 巻 3 号 p. 139-145
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーRecently, a micro lens has been demanded in uniting a laser device and an optical fiber. We have fabricated a new type of plastic micro lens by laser polymerization. The amount of the resin polymerized by exposing laser light, namely light-curing, depends on the laser power and exposing time. The shape of the lens can be controlled by changing the condition of laser irradiation.
In this paper, the characteristic of the lens formed by this method was examined. Moreover, the relation between the lens shape and the condition of laser irradiation was investigated, and the condition to reducing a transverse spherical aberration was examined. As the result, the lens of 390μm in diameter was formed. The area which can be used for light coupling from a laser diode to a multimode fiber will be 81 % in the total lens area.抄録全体を表示PDF形式でダウンロード (735K) -
池内 達, 高橋 和貴, 大久保 貴広, 藤原 民也2009 年 129 巻 3 号 p. 146-152
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーAn electrostatic neutralization of multilayer-loading silicon wafers is demonstrated using a corona discharge ionizer in nitrogen atmosphere, where ac and dc voltages are applied to two needle electrodes for generation of the negative- and positive-charged particles, respectively. We observe a surface potential of the silicon wafer decreases from ±1kV to ±20V within three seconds. Moreover, the density profiles of the charged particles generated by the electrodes are experimentally and theoretically investigated in nitrogen and air atmospheres. Our results show the possibility that the negative-charged particles contributing to the electrostatic neutralization are electrons and negative ions in nitrogen and air atmospheres, respectively.抄録全体を表示PDF形式でダウンロード (670K)
研究開発レター
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竹内 昭洋, 二田 祐佳子, 大久保 寛, 中村 行信, 阿部 道彰, 竹内 伸直2009 年 129 巻 3 号 p. 153-154
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーA large plate antenna, lying 1.2-m above the floor of an underground mine gallery in northeast Japan, detected electric signals when seismic waves arrived. One of the possible mechanisms is the positive electrification of the floor. Here, we inspected such electrification in a laboratory using an air-dried rock block quarried from the mine. The block under partial load showed the positive electrification on the surface of the unstressed volume. The assumption of positive holes is reasonable to explain the electrification. They are activated from the deformation of peroxy bonds, a populous lattice defect in rock-forming minerals. In case of the underground-detection, the seismic waves would activate p-holes near the floor.抄録全体を表示PDF形式でダウンロード (306K) -
斎藤 司, 地主 真実, 南谷 靖史2009 年 129 巻 3 号 p. 155-156
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーWe investigated method to osmose water and seasoner to dried soybeans fast by pulsed electric field, in order to make soybeans a processed food fast. By applying the pulsed electric field to the dried soybeans in water, osmosis time of water to the soybean became approximately half. Then the emission of the discharge was observed on dried soybean. The color of coffee permeated more into the soybean treated than no-treated by the pulsed electric field.抄録全体を表示PDF形式でダウンロード (285K) -
志岐 肇, 桶 真一郎, 須田 善行, 滝川 浩史, 山中 重宣, 大川 隆2009 年 129 巻 3 号 p. 157-158
発行日: 2009/03/01
公開日: 2009/03/01
ジャーナル フリーPt-Rh alloy was examined to use as rod electrode in pulsed arc of PEN-Jet (Plasma ENergized-Jet), which is one of atmospheric-pressure mesoplasma jets, with working gas of air. Erosion rate of Pt-Rh was lower than Pt. As increasing the Rh concentration, erosion rate decreased.抄録全体を表示PDF形式でダウンロード (413K)
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