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Youta ONOZAKI, Ken-ichi NAKAZATO, Tatsuo SAITO, Kei KUBOTA, Yoshihito ...
1999 Volume 11 Issue 2 Pages
95
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The giant magnetstrictve materials (GMM) are expected in many applications such as power transducers, SAW devices, and sensor devices for under sea, a satellite orbit and outdoor. However, little discussion has been made from the view point of corrosion resistance of GMM. The anodic polarization behavior was measured in acidic, alkaline and neutral salt solutions for the samples of (Tb-Dy-Fe) thin films prepared by DC sputtering process.
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Kensuke YAMAMOTO, Tomotaka SUMI, Yoshiki DOUDA, Masamoto ONO, Yoshihit ...
1999 Volume 11 Issue 2 Pages
96
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The ion-plating is used as a film formation process with a high deposition rate in many mass production process. In this study, we investigated the formation of giant magnetostricive TbFe
2 thin film by ion-plating process.
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Masato HASHIMOTO, Masaru HASHIMOTO, Kensuke YAMAMOTO, Tomotaka SUMI, Y ...
1999 Volume 11 Issue 2 Pages
97
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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MgO thin films are applied to the protective layer of plasma-dispray devices, because of high secondery electron emission and low sputtering rate. In this study, We investigated the formation of MgO thin films by ion-plating process. The MgO thin films by ion-plating process showed high transparency and high deposition rate.
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Ken-ichi NAKAZATO, Kazunori ICHIKI, Ken SAKAI, Yoshihito MATSUMURA
1999 Volume 11 Issue 2 Pages
98
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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In this study, magnetostrictive thin films were prepared by do magnetron sputtering process. The magnetic and magunetostrictive properties were investigated in relation to the Ar gas pressure.
Compositions of thin film were changed as Ar gas pressure.
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Takahiro KUBOTA, Sadao UEGUSA
1999 Volume 11 Issue 2 Pages
99-100
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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In this paper, construction of photo-catatytic rechargeable battery was studied, using organic materials. More suitable battery characteristic was obtained when the resistance of the electrode was decreased by decreasing amount of doping in the electrode. The effect of pigment in electrodes was also investigated.
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Toshifumi ISHII, Sadao UEGUSA, Kenichiro NAKAMURA
1999 Volume 11 Issue 2 Pages
101-102
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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A new type of photo-rechargeable battery was confirmed to react with light. The battery was composed of merocyanine dye mixed LB film as photocatalyst and poly-pyrrole as charge element. The layer number and the characteristics of the LB film affected drastically the performance of the battery.
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Daisuke KANEKO, Sadao UEGUSA, Yoshio INOUE
1999 Volume 11 Issue 2 Pages
103-104
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Photo-rechargeable battery is a device, which enables both photoelectric conversion and charge storage within a device. In this study a photo-rechargeable battery was made using TiO
2 particle sandwiched by pyrrole films. Battery performance was strongly dependent on the particle size and particle distribution.
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Michiaki YAMAMOTO, Sadao UEGUSA, Fujio SUDA
1999 Volume 11 Issue 2 Pages
105-106
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The dialytic battery (DB) can be generally characterized as a pollution-less battery. In this study, new type of DB was constructed with decreased leak current and pressurized salt water. The output power of the DB could be 10 times more increased than that of the former DB.
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Satoshi AZUMA, Sadao UEGUSA, Fujio SUDA
1999 Volume 11 Issue 2 Pages
107-108
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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A saline water DB (dialytic battery) was modified by using pressurized saline water. Internal resistance was increased with increased pressure. The output power of modified battery was drastically increased as much as double of the former DB battery.
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Terumi BABA, Kyouko HIRATA, Fujio SUDA
1999 Volume 11 Issue 2 Pages
109-110
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Single phase natural convection in a rectangular loop was experimentally invenstigated. As the results, there was no after effect in the temperature difference between left and right vertical branches and the frequency of temperature oscillation. However, the temperature oscillation patterns are largely influenced by the duration of no heat input. Therefore, in order to investigate the transient effect of the flow in the loop, it is necessary for the loop to rest at least 24 hours. The boundary between the unstable and stable state experimentally determined was slightly different from that obtained from the one-dimensional model.
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fractal dimension of the dentritic ice
Kiyohide MOCHIZUKI, Takashi FUJIMOTO, Fujio SUDA
1999 Volume 11 Issue 2 Pages
111-112
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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In the present study supercooling solidifications of an aqueous soluiton of NH
4Cl has been experimentally investigated; Fractal analyses were made for the dendritic-ice pattern obtained in the two ways; One is the filled pattern, and the other is that drawn by lines. Their fractal dimension
D was determined by the use of the box-counting method. As the results, their fractal dimension
D of the filled pattern (
Df) is larger than that of the pattern drawn by lines (
De). It is concluded that
Df represents the true fractal dimension
D.
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aging effect of power output
Megumi OKABE, Tomomi HOSHINO, Fujio SUDA, Sadao UEGUSA
1999 Volume 11 Issue 2 Pages
113-114
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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A dialytic battery (DB) with ion-exchange membranes can convert the mixing free energy into the electric energy. The purpose of this paper is in seeing the deterioration of the performance by use of long time of an ion exchange film. Maximum electric power became about 1/10 in carbon electrode by the use of intermittence which lasted for eight years.
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Tomomi SATO, Momoko MACHIDA, Yoshihiro YONEZAWA, Yoshio INOUE
1999 Volume 11 Issue 2 Pages
115-116
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Photocatalyst supported on granulated titania was applied to the prevention of polluted algae propagation in eutrophic water. Even in the best conditions for the propagation of algae in MA medium under solar irradiation in summer, water remained almost clear for a period of a month when the photocatalyst was placed approximately 1cm below the surface of water level. Similar results were obtained in the model household waste-water. A larger amount of waste-water was also treated similarly by circulating it to the irradiating water-channel where photocatalyst was densely scattered.
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Tomoko IKEDA, Daigo SAKAI, Yoshihiro KIUCHI, Yoshio INOUYE
1999 Volume 11 Issue 2 Pages
117-118
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Phyto-remediation by kenaf was attemptedto apply to improve eutrophic water quality. The growth of kenaf was satisfactorily achieved in water environment by using Kanuma-soil(sedimentary rocks and clays of volcanic ashes obtained primarily in northern region of Kanto Plain in Japan). Nitrate was removed from eutrophic water through growing kenaf, while phosphate was mainly absorbed on Kanuma-soil. Accordingly, the combination of kenaf and Kanuma-soil was found to be effective for remediation of eutrophic water environment.
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Study on observation bands
Satoru YAMAMIYA, Hajime FUKUSHIMA
1999 Volume 11 Issue 2 Pages
119-120
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The paper investigates appropriate combination of observation wavelengths that can be used for cloud identification algorithm for the land pixels as well as the ocean pixels. The use of a visible wavelength is suggested to discriminate the cloud over the land from the vegetation, both of which have equally high reflectance in the near-infrared bands. Aerosol radiance at 565nm band, in addition to the one at 865nm band, is proposed due to the relatively low and stable reflectance of ocean water. Some OCTS image examples are shown to demonstrate the performance of this method.
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Mika YAMAMURO, Masanobu GOTO, Kohichiroh YAMASHITA, Hirohisa UCHIDA
1999 Volume 11 Issue 2 Pages
121-122
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Previously, we reported the improvement of the initial activation rate of LaNi
2.5Co
2.5 by KOH pretreatment for electrochemical reaction. Hydrogen absorption rate is very sensitive to the sample preparation. In this study, we prepared the pellet form and powder of the LaNi
2.5Co
2.5 pretreated with KOH. In each form, we examined the effects of the pretreatment on cyclic capacity and hydrogen absorption rate.
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Koji OKADA, Atsushi KOMATSU, Hideki HOTTA, Hirohisa UCHIDA
1999 Volume 11 Issue 2 Pages
123
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Recently, rare earth based hydrogen storage alloys are used as the battery negative electrode. The rate of hydriding is markedly affected by the exposure to air because the surface of metals becomes coated with oxide and hydroxide. The alkaline pretreatments is improved the surface of metals. We reported that the initial hydrogen absorption rate in electrochemical process was enhanced by heating the surface of LaNi
5 in alkaline solution. In this study, we investigated the effect of KOH alkaline pretreatment on the equilibrium characteristics of the LaNi
5-H system.
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Shoichi TERADA, Masahiro HADANO, Nobuaki URUSHIHARA, Hirohisa UCHIDA
1999 Volume 11 Issue 2 Pages
124-125
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The absorption kinetics of H
2 with Nd was investigated using a volumetric method under ultra high vacuum. The change in the reaction probability, r as a function of absorbed H amount, N for the Nd-H
2 system was compared with those for the La-H
2 and Ce-H
2 systems. We investigated the correlations between r-N curves and equilibrium property of the Nd-H system relations at 298K.
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Yasuhito SUZUKI, Takeshi HARAKI, Hirohisa UCHIDA
1999 Volume 11 Issue 2 Pages
126-127
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The diffussion controlling H
2 desorption kinetics was found by the measurement of desorption rate of LaNi
5H
6. According to this result, two methods of analysing the activation energy were examined, one for diffusivity and another for temperature dependence on the desorption rate. From data obtained, the activation energy for diffusion of H was calculated. The activation energies obtained from two different analitic methods were compared with each other.
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Hiromi TAMURA, Kaoru SUZUKI, Yuka OZU, Haru-Hisa UCHIDA
1999 Volume 11 Issue 2 Pages
128-129
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The hydrogen storage alloy is an important element in hydrogen system as energy carrier. Unfortunately by contacting with air the hydrogen storage alloy becomes to be deactivated and usually does not absorb any hydrogen more. Recently we found the effect of alkaline treatment and subsequent water rinsing process on the H
2 sorption characteristics, where the H
2 sorption is improved even after a significant oxidation. In this study we investigated the effect of only by the treatment at the water treatment on the H
2 sorption characteristics. We found the preferred effect only at adequate temperature and with treatment duration.
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Toki SUGIYAMA, Akiko KITAHARA, Haru-Hisa UCHIDA
1999 Volume 11 Issue 2 Pages
130-131
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Penetration of H
2 and CO
2 through organic silicone compound sheet was tested from the viewpoint of gas separation. Additionally LaNix was deposited on the organic silicone compound sheet and the penetration characteristics of both H
2 and CO
2 were investigated. While almost no difference was observed at H
2 and CO
2 penetration through the sheet without LaNix, however, decreased hydrogen diffusion rate was measured for the film with LaNix.
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Shinji TAKADA, Haru-Hisa UCHIDA, Yuka OZU, Yoshitake NISHI, Masafumi O ...
1999 Volume 11 Issue 2 Pages
132-133
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Electron beam irradiation was carried out for modifing surface chemical property of H
2 storage alloy. As a first result, the effect of the irradiation on the H
2 sorption characteristics of LaNi
5 was investigated. Electron beam of 200kV was irradiated under 1bar air and N
2 at room temperature. Irradiation under airdecreased the initial absorption rate, while the storage capacity increased up to 3% after the irradiation under N
2.
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Shinya SAKURABA, Haru-Hisa UCHIDA
1999 Volume 11 Issue 2 Pages
134-135
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Environmental impact by recycling paper package for milk products (milk pack) was estimated using environmental I/O table in Japan. Present state of recycling technology and materials flow was also investigated. Production of 7.66×10
5ton toilette paper (1997 in Japan) was considered using recycled 2.001×10
5ton of milk pack (1997 in Japan) in function of recycle rate. In case of using PE coating film on milk packs for thermal energy in recycle process the impact becomes reduced with increasing recycle rate of milk packages.
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Chie ISHII, Sakie KUBO, Haru-Hisa UCHIDA
1999 Volume 11 Issue 2 Pages
136-137
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Air exposure of LaNi
5, which yields the growth of surface oxide layer, results in the decreased H
2 absorption rate and the accelerated pulverization of the sample at the subsequent hydriding cycles. Recently effect of alkaline pretreatment and/or of Pd catalysis addition onto the LaNi
5 powder were reported. Accelated molecular dessociation on the oxide surface by these treatments improve the absorption kinetics drastically even after significant oxidation.
In this report the effect of these treatments on the sample pulverization was investigated. The existence of surface alkaline hydroxide (LiOH) layer accelerated the pulverization, while no difference was observed at the addition of Pd catalysis.
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Hidehiko NARUSAWA, Moriaki WAKAKI
1999 Volume 11 Issue 2 Pages
138-139
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Centrifuge separation in a Sol-Gel process was tested to form metaloxane distribution in the precursor gel to make a gradient-index lens in short time. In this process, TiO
2 gel particles that increase refractive index will grow at early stage of gelation. After centrifuge separation, the solution show characteristic IR absorption spectra which could indicate difference of TiO
2 concentration.
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Yasuhiro KATANO, Moriaki WAKAKI
1999 Volume 11 Issue 2 Pages
140-141
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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A fundamental study of 3-dimendinal photo hardening using an infrared laser, CO
2 laser, was carried out instead of using a conventional UV laser. It was aimed to obtain a relation between power densities and irradiation time for thermal hardening plastics.
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Mitsuo KAWASHIMA, Syouji NAGATOMO, Masamori ENDO, Shuzaburo TAKEDA, Ke ...
1999 Volume 11 Issue 2 Pages
142-143
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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High pressure operation of Chemical Oxygen Iodine Laser (COIL) with an advanced jet-type Singlet Oxygen Generator (SOG) and Turbo blower was demonstrated. The required vacuum pump Cavity was substantially reduced by this schare. The obtained chemical efficency was 17.1% at 290W out put. The specific energy, 2.23J/l was three times higher than this of supersonic operation.
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Kenji SUZUKI, Daichi SUGIMOTO, Tomoo FUJIOKA, Takanori KAWANO, Masamor ...
1999 Volume 11 Issue 2 Pages
144-145
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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One of the most important factors for industrial laser is an ability to produce a pulsed-output beam. In order to achieve high peak pulse generation on Chemical Oxygen Iodine Laser (COIL), magnetic gain switching based on the Zeeman effect has been studied. As a result, pulse oscillation was successfully obtained and the peak power was three times higher than the average power.
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Ken NAGATA, Akihiro MATSUBARA, Akira TONEGAWA, Eiji YABE, Kazutaka KAW ...
1999 Volume 11 Issue 2 Pages
146-147
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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A new gas divertor preventing the reverse flow of the cooling gas has been experimentally investigated by using the small TP-D plasma source. Experimental results clearly show that the newly constructed high vacuum region in the divertor can prevent the reverse flow. An effect of plasma plugging on the reverse flow is also discussed.
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Takeshi MIURA, Ryoichiro MURATA, Akihiro MATSUBARA, Akira TONEGAWA, Ei ...
1999 Volume 11 Issue 2 Pages
148-149
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Ion electric current “Ii” shows the peak value at the frequency that is higher than ion cyclotron resonance frequency (ICRF: f
ci) in the sheet plasma. We call “the extraordinary heating of sheet plasma” for the phenomenon mentioned above, although the physical explanation of such heating has not be given up to now.
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Kentaro KATO, Ryoichiro MURATA, Akihiro MATSUBARA, Akira TONEGAWA, Eij ...
1999 Volume 11 Issue 2 Pages
150-151
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The effect of the discharge current Id of a sheet plasma on the neon ion temperature which is one of the parameter for gas divertor experiment has been experimentally investigated. The neon ion temperature T
i is measured from the Doppler broad of emission spectrum in the sheet plasma by spectroscopy. We have observed that the value of T
i is nearly constant with respect to Id.
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Kazuya TAKEDA, Masahiro SATO, Akira TONEGAWA, Kazutaka KAWAMURA, Kazuo ...
1999 Volume 11 Issue 2 Pages
152-153
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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The formation of detached Ar plasma at the undirectional or directional contact of Ar or H
2 gas has been carried out experimentally from the viewpoint of the cooling of the Ar plasma concerned with a fundamental research on the gas divertor by using the magnetized sheet plasma. The detached plasma forms easily by the directional contact of H
2 cooled gas. On the other hand, no detached plasma forms by the contact of Ar gas.
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Yuuichi WATANABE, Akira TONEGAWA, Masahiro SATO, Kazutaka KAWAMURA, Ka ...
1999 Volume 11 Issue 2 Pages
154-155
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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We have demonstrated the measurement of two-photon laser-induced fluorescence to monitor atom concentrations in a magnetized sheet plasma with vertical gas flow system. The Oxygen atomic radicals were detected by exciting O atoms at 226nm and detecting fluorescence at 845nm.
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Makoto OGAWA, Masataka ONO, Akira TONEGAWA, Kazutaka KAWAMURA, Kazuo T ...
1999 Volume 11 Issue 2 Pages
156-157
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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We have demonstrated the measurment of the heat flux and the spatial profile of the electric current at end-plate in a magnetized sheet plasma. It is found that the heat flux depends on the loss of negatively charged particles at the center region in the sheet plasma.
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Shinsuke YOSHIZAWA, Masahiro SHIBAMOTO, Akira TONEGAWA, Kazutaka KAWAM ...
1999 Volume 11 Issue 2 Pages
158-159
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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We have developed the system as it makes up the temporal measurement of the plasma parameters (electron density N
e, electron temperature T
e, electron distribution function f
e(v)) in the pulse sheet plasma. It is found that T
e and f
e(v) dramatically change until the plasma is stady state; the high energy electrons (10-20eV) appear at initial condition (t=0.36msec).
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Tomokuni EGAWA, Yuichi ISHIKAWA, Keisuke YAMAZAKI, Katsuhiko SUNAKO
1999 Volume 11 Issue 2 Pages
160-161
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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We proposed a new type of unstable resonator. Generally it is difficult for the unstable resonator to put out laser beam in a low gain laser medium (ex. Chemical Oxygen Iodine Laser: COIL). We considered the new type of unstable resonator, which stimulated more times of transitions in cavity. Output power of unstable resonator was simulated and compared with the confocal one.
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Shinobu OHARA, Hirotaka KOTAKE, Daichi SUGIMOTO, Shigeru YAMAGUCHI, To ...
1999 Volume 11 Issue 2 Pages
162-163
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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Objective of this study is to develop an Optical Multi-Channel Analyzer (OMA) in mid-infrared region and broadband TE-CO
2/N
2O pulse laser for an environmental gas sensing. Newly developed MCT-array, which is capable of monitoring a wide-range of spectrum at the same time, was employed as a detector of the multi-channel analyzer. Absorption spectrum of the NH
3 was successfully observed using this new OMA.
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Takashi FUSHIMI, Akihiro NAKANISHI, Shigeru YAMAGUCHI, Tomoo FUJIOKA, ...
1999 Volume 11 Issue 2 Pages
164-165
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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It is known that the quality of cutting plate using laser optics and the flow of assisting gas which is blowing in high speed from processing nozzle. It is estimated that particularly distribution of flow speed and of the gas in the cut kerf influences the characteristics of cutting, but there are various unknown things in them. Then, the target of this research is to find a best condition of cutting from visualization of the flow in the kerf with changing the pressure of assisting gas and the radius of the nozzle and width of the kerf by using optical device.
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Yasunori NOJIMA, Moriaki WAKAKI
1999 Volume 11 Issue 2 Pages
166-167
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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A multi-channel Fourier transform spectrometer (MCFTS) has the merits of both a Fourier transform spectrometer and a multi-channel spectrometer. We tried the application of a MCFTS to Raman scattering measurements. In this study, the emission of Cd spectral lamp was measured by using a birefringence polarizing interferometer with a Savart plate as a calibration of the system.
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Jun-ichiro NAOHARA, Daisuke YANAGIHARA, Sadao UEGUSA, Shiosaku YAZAWA
1999 Volume 11 Issue 2 Pages
168-169
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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In this presentation a general model was proposed for forecasting the development of science and technology in the future using a chaos prediction. A computer program was made for this new model using a neural network based on the Back propagation method.
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Takamitsu NUMATA, Sadao UEGUSA
1999 Volume 11 Issue 2 Pages
170-171
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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As for the present world industrial technology, significant progress was made after the industrial revolution. The revolution was the important factor of the progress which changed the structure of the society. In this paper, the revolution in Japan was supposed to be the time period after the world war II. The corresponding industrial revolution in England, America and Japan were compared and analyzed from the view point how changed the society systems in each countries.
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Shunichi NOGUCHI, Masanori INADA, Tsunenori SUZUKI
1999 Volume 11 Issue 2 Pages
172-173
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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We developed the teaching video materials for WWW. We filmed an experiment by a digital video camera. The teaching materials consist of including an experiment of Coulomb's force between the two balls. It is easy to understand the static electricity between the two balls by using visualization of the physical phenomena.
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Takahito SUZUKI, Tsunenori SUZUKI, Harunobu SEITA, Chikara ITOH, Shige ...
1999 Volume 11 Issue 2 Pages
174-175
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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In this research, developments of an educational tool and an instructive simulator for a beginner in the antenna technology were carried out, which provide an analysis of thin wire antenna as well as the basic electromagnetic theory. This instructive simulator is believed to be very useful for a basic analytical function by mean of adopting wavelet.
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Tasuku OGURA, Yasuhiro KOMATSU, Sadao UEGUSA
1999 Volume 11 Issue 2 Pages
176-178
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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In this paper, we investigated the characteristics of the historical development of semiconductor device using the concept of abduction. Five types of abduction could be defined in analyzing the historical progress of the semiconductor.
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Hajime ONODA
1999 Volume 11 Issue 2 Pages
f1-f4
Published: August 15, 1999
Released on J-STAGE: February 25, 2010
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