Journal of Advanced Science
Online ISSN : 1881-3917
Print ISSN : 0915-5651
ISSN-L : 0915-5651
Search
Advanced search
OR
Browse
Search
Volume 14, Issue 1-2
Displaying 1-49 of 49 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Preparation and evaluation of a porous ceramics from used bottles
    Masayoshi YAMAZAKI, Takashi KUBOTA, Jun-ichi MATSUSHITA
    2002 Volume 14 Issue 1-2 Pages 1-4
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.1
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Used glass bottles have remained useless. It is, thus, the present purpose how the used bottles can be processed and changed to the insulation materials technologically. After the used glass bottles are grounded into <50μ powder by a mortar or a ball-mill in ethyle alcohol, the obtained slurry powder is mixed with carbonate and others. Such slurry, then, is pressed under the pressure of 20MPa and heated at 800°C for 10min. in the air. Judging from the results of many physical and mechanical tests of the finally obtained materials, i.e., porous ceramics, we propose that the porous ceramics could be used as the insulation materialse.
    View full abstract
    Download PDF (566K)
  • Preparation and evaluation of a porous ceramics from trash glass
    Masahiko WATANABE, Takashi KUBOTA, Jun-ichi MATSUSHITA
    2002 Volume 14 Issue 1-2 Pages 5-8
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.5
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The recycling of trash glass is strongly required from the views of the environmental pollution and the re-use of wasted glass. It is the present purpose how the trash glass can be processed and changed to the insulation materials technologically. After the trash glass is grounded into <50μ powder by a mortar or a ball-mill in ethyle alcohol, the obtained slurry powder is mixed with calcium carbonate and others. Such slurry, then, is pressed under the pressure of 20MPa and heated at 800°C in the air. Judging from the results of many physical and mechanical tests of the finally obtained materials, i.e., porous ceramics could be used as the insulation materials.
    View full abstract
    Download PDF (606K)
  • Study of controlled molecule condition of organic-dye L/LB film by electric field
    Tsutomu TERAO, Sadao UEGUSA, Kenichiro NAKAMURA, Takanobu KUMAMOTO
    2002 Volume 14 Issue 1-2 Pages 9-12
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.9
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The purpose of this research wants to create L/LB film of an only organic-dye without Arachidic acid (AA). However, if L/LB has no AA, it will not be in a good condition of molecule state. Therefore, membranous molecule condition is regularly controlled by electric field. Only RhodamineB's molecule condition of L film created a set state that touches the hydrophilic group. And The condition was analyzed the π-A curve. Moreover, only Merocyanine created LB film, which controlled to J band condition. Optical absorption strum of the LB film was measured and examined. As a result, it was found from two analyses that both of molecules were controlled by the electric field.
    View full abstract
    Download PDF (811K)
  • Fatigue recovery of PZT by electron beam irradiation treatment
    Kentaro TAKASHINA, Hideki YAMAGUTI, Akihiro MIZUTANI, Yoshitake NISHI
    2002 Volume 14 Issue 1-2 Pages 13-14
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.13
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The fatigue of PZT was recovered by the electron beam irradiation. A fatigue life was evaluated by using collision test. The fatigue recovery was discussed based on ESGA results.
    View full abstract
    Download PDF (308K)
  • Materials research for medical catheter
    Byungsuk KIM, Norihito MOTAI, Hiromasa YABE, Yoshitake NISHI, Haru-His ...
    2002 Volume 14 Issue 1-2 Pages 15-16
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.15
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A new actuator for medical catheter is developed, which is operated by volume expansion of hydrogen storage alloy. A testing actuator using LaNi3Co2powder exhibited reversible shape change by changing the hydrogen gas pressure. A large strain change was obtained by alterative flowing of pure H2 gas and Ar-5%H2 gas mixture.
    View full abstract
    Download PDF (2700K)
  • Improvement of critical current in MgB2 superconducting tapes
    Osamu SUZUKI, Masakazu ENOMOTO, Makoto AODAI, Yutaka YAMADA, Kyoji TAC ...
    2002 Volume 14 Issue 1-2 Pages 17-18
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.17
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Newly discovered MgB2 superconducting tapes have been prepared by PIT process. The critical current (Ic) of the Ni-sheathed MgB2 tapes with 10vol% In and Sn addition excesses 300A at 4.2K, corresponding to above the critical current density (Jc) of 40, 000A/cm2. The addition of powder metals with low melting point improves the Ic for the MgB2 superconducting tapes.
    View full abstract
    Download PDF (2290K)
  • A stick-type enzyme electrode for a breath alcohol analysis
    Hiroyuki MATSUNAGA, Satoshi TODA, Kohji MITSUBAYASHI
    2002 Volume 14 Issue 1-2 Pages 19-20
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.19
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A stick-type gas-phase biosensor (bio-nose) for ethanol vapor was constructed using alcohol oxidase (AOD). The calibration range of the bio-nose for ethanol vapor was from 1.0 to 500ppm. The nose device was also possible to assess the concentration of ethanol in breath air after alcohol-drinking.
    View full abstract
    Download PDF (313K)
  • A bioelectronic nose for ammonia vapor
    Yuki KANEKO, Yuki HASHIMOTO, Kohji MITSUBAYASHI
    2002 Volume 14 Issue 1-2 Pages 21-22
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.21
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A gas-phase biosensor (bio-nose) for ammonia was fabricated by incorporating an enzyme electrode with flavin-containing monooxygenase into a reaction unit with both liquid- and gas-phase cells separated a porous diaphragm membrane. The bio-nose was calibrated against ammonia vapors from 3.72 to 366ppm.
    View full abstract
    Download PDF (270K)
  • A study on cognitive functioning to detect a target from opposite visual flow
    Chie AKASAKA, Shu-hei OGAWA, Naoaki KANAI, Katsurou OKAMATO, Kiyoyuki ...
    2002 Volume 14 Issue 1-2 Pages 23-24
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.23
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To investigate the cognitive functioning of moving visual target detection from the non-target visual flow with the same or opposite flow direction, an experiment was carried out with a computer controlled CRT display. Correct detection score of the target from the non-target flow with the opposite direction was better than that from the same direction. The effects of the visual adaptation on task performance was discussed.
    View full abstract
    Download PDF (266K)
  • A posture reflex evoked by the virtual self-moving condition
    Yuya ISHII, Seiji OH-YA, Kiyoyuki YAMAZAKI, Naoaki KANAI, Katsuro OKAM ...
    2002 Volume 14 Issue 1-2 Pages 25-26
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.25
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To investigate the cognitive aspects of posture control under the apparent force condition generated by auditory stimulation, body sway fluctuation was measured with healthy adult subjects. As an experimental stimulation, an increasing tone for the left ear and a decreasing tone for the right ear were used.. Subjects felt that the sound source was moving from right to left under an eyes closed condition. On the contrary, subjects who were shown a moving image of a natural scene which was interlocked to the auditory stimulus before the experiment (cognitive preparation), they felt themselves moving from a left to right direction. In this experiment, body sway was measured with and without the cognitive preparation. Results showed that the center of gravity biased to the opposite direction of subjective movement of the sound source with cognitive preparation. Without cognitive preparation, the center of gravity biased in the same direction of subjective movement of the sound source. It suggests that the higher level posture control reflex was observed in the cognitive condition without any sensory input from the muscle receptors.
    View full abstract
    Download PDF (305K)
  • The relationship between the required time for the stereopsis and the pixel density of random dot pattern
    Shu-hei OGAWA, Nobuyuki SUZUKI, Naoaki KANAI, Katsurou OKAMATO, Kiyoyu ...
    2002 Volume 14 Issue 1-2 Pages 27-28
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.27
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In order to analyze the performance of 3D perception using controlled random dot patterns containing different pixel density, a minimum required time of depth perception was estimated. The experimental task was to discriminate displayed figures which had three different apparent depths in the random-dot-stereogram on a computer controlled CRT screen. Results showed that the required time for depth perception in the experimental condition was not longer than that in the control condition. This suggests that the depth information processing in the human brain is not only a correlation computation of images from both eyes but also another processing stage based upon multiple feedback mechanism from various visual areas.
    View full abstract
    Download PDF (299K)
  • Symbol legibility and the P300 component of Event Related Potentials
    Tetsuo MATSUNAGA, Yoshikazu NISHIDA, Naoaki KANAI, Kenji IKEDA, Katsur ...
    2002 Volume 14 Issue 1-2 Pages 29-30
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.29
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    For the development of a communication-assisting device for disabled users using simplified symbols, legibility of displayed information must be investigated. In this study, to assess the symbol legibility an experimental study was carried out by using measurement of the P300 component of Event Related brain Potentials. Measured amplitudes and latencies of the P300 component were analyzed. Result suggested that the number of association items from a symbol may be influence on the latency of the P300 component.
    View full abstract
    Download PDF (292K)
  • An assessment of the wearing comfort of diapers utilizing EEG measurement
    Toshihiro ENDO, Toshihiko OH-HASHI, Masataka ISHII, Kenji IKEDA, Naoak ...
    2002 Volume 14 Issue 1-2 Pages 31-32
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.31
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In order to assess the wearing comfort of disposable diapers for adult users, an experimental study was carried out using the EEG measurement. As the experimental condition, 80ml of physiological salt solution at 37 degrees centigrade was injected in the diaper during the EEG measurement. Three types of diapers with different absorbency were used for the study. Time course of alpha wave activities was analyzed. Integrated alpha power was decreased at 30 minute after salt solution injection in low absorbent diaper. The methodological problems of the assessment of diaper characteristics were discussed.
    View full abstract
    Download PDF (317K)
  • A film-type glucose sensor with optical transparency
    Yoshihiro OYA, Tatsuro ENDOH, Kohji MITSUBAYASHI
    2002 Volume 14 Issue 1-2 Pages 33-34
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.33
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A thin biosensor for glucose was constructed by immobilizing glucose oxidase (GOD) onto a sensitive area of the flexible oxygen electrode with ITO (Indium-Tin Oxide) working electrode. The glucose sensor has good optical transparency (>0.6 abs.) at visible zone (wavelength: 400-700nm), and was calibrated against glucose standard solutions from 0.06 to 1.24mmol/l.
    View full abstract
    Download PDF (286K)
  • A telemetry system with mobile phones for monitoring human physical indices
    Yoshihiko WAKABAYASHI, Kohji MITSUBAYASHI, Yoshiko TAYA, Yoko NOMURA
    2002 Volume 14 Issue 1-2 Pages 35-36
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.35
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A convenient telemeter system was constructed using a mobile measuring device (slave unit) and a base computer system (master unit) with two mobile phones. As the results of applying it with thermistors onto skin-surfaces, the system was possible to tele-monitor the skin-surface temperatures successfully.
    View full abstract
    Download PDF (313K)
  • Development of large shape change actuator by using lightweight bi-metal consisted of polymer and metal
    Kazunori AKIYAMA, Hiromasa YABE, Yoshitake NISHI
    2002 Volume 14 Issue 1-2 Pages 37-38
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.37
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    New lightweight bi-metal actuator which shows the larger shape changes operated by temperature changes was innovated. Polymer-metal bi-metal was prepared by physical vapor deposition. The large reversible shape changes were caused by temperature changes. The maximum strain was about 3500ppm.
    View full abstract
    Download PDF (344K)
  • The development of photo-electric conversion device produced by n-silicon and p-photocatalyst layer
    Abdul Hakim, Sadao UEGUSA
    2002 Volume 14 Issue 1-2 Pages 39-40
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.39
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The opto-electronics device is an element that photoelectric conversion is possible by itself. In the present investigation, the opto-electronics device was constructed by using organic materials. From this research, we attempt to find out the characteristic of opto-electronics produced by n-silicon and p-photocatalyst layer by changing the polymerization quantity of the storage layer and the incident light intesity. It was found that the photovoltage increases linearly with incident light intesity.
    View full abstract
    Download PDF (293K)
  • Fabrication of the CNx films by TPD sheet plasma source
    Ken'ichiro ONA, Mitsuo IWASE, Akira TONEGAWA
    2002 Volume 14 Issue 1-2 Pages 41-42
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.41
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The nitrogen gas reactive plasma is irradiated on the carbon target in order to obtain CNx films. The critera of a better irradiation process are as follows; the target voltage and the discharged current are 300V and 20A, respectively. The CNx films have been analyzed by the FTIR, XPS(ESCA), AFM, Raman and UV Methods. The results suggest that the CNx film is amorphous state.
    View full abstract
    Download PDF (305K)
  • Crystal synthesis and thermoelectric properties of Cu-based ternary compound semiconductors
    Kouichirou HIRASAWA, Takashi MAEDA, Hiroaki MATSUSHITA, Akinori KATSUI
    2002 Volume 14 Issue 1-2 Pages 43-44
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.43
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Among the combination of ternary compounds, we have investigated about the synthesis of Cu2-IV-VI3 and Cu3-V-VI4 (IV=Si, Ge, Sn; V=Sb; VI=Se, Te). The melting points have been determined by using the differential thermal analysis. A single phase was formed for Cu2GeSe3, Cu2GeTe3, Cu2SnSe3, Cu2SnTe3 and Cu3SbSe4 by melt growth. As results of temperature dependence of Seebeck coefficient, the maxima of Cu2SiTe3, Cu2GeTe3 and Cu2SnSe3 were obtained to be 144, 25 and 231μV/°C respectively.
    View full abstract
    Download PDF (338K)
  • Oxidation of Fe-20Cr-4Al alloys with small amounts of sulfur for a long time at 1273K
    Tadaaki AMANO, Ryouta SAWAGUCHI, Takashi MITANI, Masakazu OHISHI, Hisa ...
    2002 Volume 14 Issue 1-2 Pages 45-46
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.45
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Oxidation of Fe-20Cr-4Al alloys with small amounts of sulfur was studied in dry air at 1273K for 3600ks by mass change measurements, X-ray diffraction, macro-morphology of oxidized surface of the Fe-20Cr-4Al alloys, X-ray diffraction and scanning electron microscopy. Mass change of the alloy with 7ppm of sulfur showed a negative value because of marked spalling of the oxide film or the alloy. Mass changes increased with increasing sulfur content.
    View full abstract
    Download PDF (2919K)
  • The effects of yttrium addition on oxidation behavior of a Fe-20Cr-4Al-S (185ppm) alloy
    Tadaaki AMANO, Tetsuya SATO, Hideaki NANBA, Kiyoshi HIGUCHI, Hisao ISO ...
    2002 Volume 14 Issue 1-2 Pages 47-48
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.47
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The effects of yttrium addition on oxidation behavior of a Fe-20Cr-4Al-S alloy were studied in dry air at 1273K for 3600ks by mass change measurements, macro-morphology of oxidized surface, X-ray diffraction and scanning electron microscopy. Mass change of an alloy containing only S (185ppm) was 0.67×10-2kg/m2. The mass change of the alloys increased in the order of the 300ppmY<800ppmY<3700ppmY<10ppmY<185ppmS.
    View full abstract
    Download PDF (2938K)
  • Influence of small amount of Hf for oxidation of Fe-20Cr-4Al-S (185ppm) alloys
    Tadaaki AMANO, Kazumasa YAMADA, Tomohiko MATSUZAKI, Akihisa IWAMI, His ...
    2002 Volume 14 Issue 1-2 Pages 49-50
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.49
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Oxidation behavior of Fe-20Cr-4Al-S (185ppm) alloys with hafnium was studied in dry air at 1273K for 3600ks by mass change measurements, macro-morphology of oxidized surface, X-ray diffraction and scanning electron microscopy. The mass change of the alloy containing only 185ppmS was of 0.67×10-2kg/m2. The mass changes of all the alloys increased in the order of the 900ppmHf<500ppmHf<1900ppmHf<185ppmS<4300ppmHf.
    View full abstract
    Download PDF (2612K)
  • The cyclic-high temperature oxidation behavior of Fe-20Cr-4Al-S (748ppm) alloys with small amounts of yttrium at 1273K
    Tadaaki AMANO, Tsuyoshi WAKABAYASHI, Yumiko MORI, Sumiko BIRUKAWA, His ...
    2002 Volume 14 Issue 1-2 Pages 51-52
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.51
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The cyclic-high temperature oxidation behavior of Fe-20Cr-4Al-S (748ppmS: A), Fe-20Cr-4Al (702ppmS, 30ppmY: B), Fe-20Cr-4Al (645ppmS, 30ppmY: C) and Fe-20Cr-4Al (73ppmS, 1700ppmY: D) alloys was studied in oxygen at 1273K during 5cycles (1cycle=18.0ks) by mass change measurements, macro-morphology of oxidized surface of the alloy, X-ray diffraction and scanning electron microscopy. Mass changes of all the alloys increased with increasing number of cycles. Cyclic-high temperature oxidation resistance of the C and D alloys increased markedly as compared with the A and B alloys.
    View full abstract
    Download PDF (2649K)
  • Cyclic-high temperature oxidation behavior of Fe-20Cr-4Al-S (748ppm) alloys with yttrium at 1673K
    Tadaaki AMANO, Tomonori ISHIKAWA, Yoshinao NAITO, Hisao ISOBE
    2002 Volume 14 Issue 1-2 Pages 53-54
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.53
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The cyclic-high temperature oxidation behavior of Fe-20Cr-4Al (748ppmS: A), Fe-20Cr-4Al (702ppmS, 30ppmY: B), Fe-20Cr-4Al (645ppmS, 30ppmY: C), Fe-20Cr-4Al (382ppmS, 40ppmY: D) and Fe-20-Cr-4Al (73ppmS, 1700ppmY: E) alloys was studied in oxygen at 1673K during 5 cycles by mass change measurements, macro-morphology of oxidized surface of the alloys, X-ray diffraction and scanning electron microscopy. Mass changes of all the alloys increased with increasing number of cycles. The alloy E showed marked resistance for the cyclic-high temperature oxidation.
    View full abstract
    Download PDF (2887K)
  • Hydrogen absorption of nanostructural Mg2Ni alloy prepared by mechanical grinding
    Yasushi DAIKUHARA, Takashi MIYATA, Hirohisa UCHIDA, Toshiro KUJI
    2002 Volume 14 Issue 1-2 Pages 55-56
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.55
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Mg2Ni is one of the most promising hydrogen storage materials because of its high hydrogen absorption capacity. But its hydriding and dehydriding kinetics are very slow and hydriding/dehydriding temperature is very high. Recently much attention has been paid to make nanostructural Mg2Ni alloy. The alloy is expected to have much faster kinetics for hydrogen absorption and desorption at lower temperatures. The hydrogen absorption properties of nanostructural Mg2Ni alloy prepared by mechanical grinding is discussed.
    View full abstract
    Download PDF (2345K)
  • Creep behavior using Ti-TiB in situ composites
    Kumi Endo, Jun-ichi MATSUSHITA, Kenshi KAWABATA, Eiichi SATO, Kazuhiko ...
    2002 Volume 14 Issue 1-2 Pages 57-58
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.57
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In order to estimate dependence of volume fraction of ceramic and metallic phase on composite's creep behavior, we fabricated Ti-TiB in situ composites whose volume fractions of TiB were 10, 24 and 40%. The steady-state creep rates of all composites were agreement with the estimation of continuum mechanic. Microstructure of Ti-40TiB, however is quite different from that of Ti-10TiB, because TiB whiskers are strongly connected each other in Ti-40TiB. This structure of Ti-40TiB seems to require the deformation off TiB to creep, and of creep behavior of composites with high volume fraction of reinforcements requires more extensive study.
    View full abstract
    Download PDF (2282K)
  • Solid-state diffusion bonding of closed-cell aluminum foams
    Akiko KITAJIMA, Jun-ichi MATSUSHITA, Koichi KITAZONO, Eiichi SATO, Kaz ...
    2002 Volume 14 Issue 1-2 Pages 59-60
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.59
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Solid-state diffusion bonding (DB) was demonstrated for joining closed-cell aluminum foams (ALPORAS). A superplastic 5083 aluminum alloy sheet was inserted between the foams to assist the DB process. Microscopic observation revealed that the cell wall of the foams penetrated into the 5083 alloy sheet and their interface partly disappeared. Energy dispersion X-ray spectrometer(EDS) confirmed the diffusion of magnesium element from the 5083 alloy to the aluminum foam regions. The bonding strength was evaluated by four-point bend tests. The obtained bending stress was about 50% of the original foam at room temperature and was more than 60% at 423K. The advantage of the DB process in the high temperature applications was discussed comparing with the adhesive bonding of aluminum foams.
    View full abstract
    Download PDF (3080K)
  • Fundamental study of Ti: Al2O3 ceramics Laser medium
    Daisuke MOCHIDA, Hiroshi MUROTANI, Moriaki WAKAKI
    2002 Volume 14 Issue 1-2 Pages 61-62
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.61
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Laser media have been conventionally made of single crystal materials. However, single crystals have the disadvantages of less flexibility of forming and poor productivity. We used ceramic materials in place of single crystals to solve these problems. We produced ceramic laser media in which porosity and purity were controlled.
    View full abstract
    Download PDF (273K)
  • Permeation of hydrogen gas through acation-exchange membrane
    Shigeru KACHI, Haru-Hisa UCHIDA
    2002 Volume 14 Issue 1-2 Pages 63-64
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.63
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Permeation of H2 through a cation-exchange membrane was tested from the viewpoint under H2 purification. We measured the hydrogen penetration property of a catian-exchange membrane under various conditions. No permeation of the H2 gas was observed through a dry membrane or a wet membrane. However, hydrogen permeated through a few membranes with vacuum-evaporated of Au-Pd layers as a catalyst.
    View full abstract
    Download PDF (361K)
  • An alkaline hydrogen storage alloy prepared by mechanical alloying
    Naoki OKADA, Haru-Hisa UCHIDA, Ryota GENMA, Yoshitake NISHI
    2002 Volume 14 Issue 1-2 Pages 65-66
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.65
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In hydrogen energy systems, hydrogen transportation using hydrogen storage alloys e.g. LaNi5 is expected. Since the weight of hydrogen storage alloys is huge, less heavy hydrogen storage alloys are required. From this point of view, we prepared the alkaline hydrogen storage alloys by mechanical alloying and investigated their hydrogen absorption characteristics.
    View full abstract
    Download PDF (374K)
  • Effect of alkaline pretreatment on hydrogen absorption property of water vapor exposed LaNi5
    Shingo TSUBUTEISHI, Yoshitake NISHI, Haru-Hisa UCHIDA
    2002 Volume 14 Issue 1-2 Pages 67-68
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.67
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Electrolysis of water is an important production method of hydrogen. But it contains much amount of impurities such as O2 and H2O etc. The H2 absorption of hydrogen storage alloy is deteriorated by impurities in H2 gas. Recently, we reported an effect of LiOH and H2O pretreatment, which drastically enhances the H2 absorption of the alloy even after the significant air oxidation. In this paper, we report effect of LiOH pretreatment on H2 absorption of water vapor exposed LaNi5.
    View full abstract
    Download PDF (302K)
  • Construction of photo-rechargeable battery using rhodamine B
    Hiroki WATANABE, Sadao UEGUSA, Kenichiro NAKAMURA
    2002 Volume 14 Issue 1-2 Pages 69-70
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.69
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Photo-rechargeable battery was constituted using the Pori-Pyrrole and Rhodaminine B as a photocatalyst layer and an electronic accumulation material respectively. Accumulation voltage and efficiency were measured with different polymerization voltage of 0.5-3.0[V]. At lower polymerization voltage, higher photo voltaic efficiency was obtained.
    View full abstract
    Download PDF (332K)
  • Performance comparison of DB and UDB generator
    Tsutomu IWASHITA, Sadao URGESA, Fujio SUDA
    2002 Volume 14 Issue 1-2 Pages 71-72
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.71
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The Performance of model generator of DB (Dialytic Battery) and UDB (Ultra Dialytic Battery) were compared under same experimental condition. Time dependence of output voltage and electric power were observed. In spite of larger internal resistance of UDB, higher output energy was obtained in comparison with the DB.
    View full abstract
    Download PDF (344K)
  • Basic performance of a dye-sensitized all plastic photovoltaic cell
    Taketo OSHIMA, Sadao UEGUSA, Kenichiro NAKAMURA
    2002 Volume 14 Issue 1-2 Pages 73-74
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.73
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A photovoltaic cell was fabricated based on the basic structure of Gratzel cell. All the systems of this cell were made from the electro conducting polymers which was an organic substance of poly-para-phenylene (PPP). We used p and n-type PPP which were made by the electrolytic polymerization as an electrode. Successful result was obtained as a functioning all plastic photovoltaic cell.
    View full abstract
    Download PDF (376K)
  • Oxidation and Hydroxidation of Cerium Films at 298K
    Daisuke TABUSE, Yasunori TAJIMA, Daisuke KATSUYA, Fujio SUZUKI, Hirohi ...
    2002 Volume 14 Issue 1-2 Pages 75-76
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.75
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this study, we aimed at measuring the quantitative reactivity of O2 and H2O with Ce films with clean surface at 298K. In Ce-O2 system, the reactivity of O2 with the Ce surface exhibited the highest value at the initial stage, meaning that all O2 molecules impinging the surface can adsorb on the Ce surface. With the increasing amount of adsorbed O2, the O2 reactivity decreased rapidly. Ce was found to have higher O2 reactivity compared with other rare earths metals. In Ce-H2O system, the reactivity of H2O with the Ce surface exhibited also the highest value at the initial stage, suggesting that all H2O molecules impinging the surface adsorb and dissociate into H, O and/or OH. The number of the H atoms dissociated from the adsorbed H2O molecules was found to decrease with the increasing amount of adsorbed H2O molecules. A quantitative analysis was made for the reactivity of the H atoms dissociated from H2O.
    View full abstract
    Download PDF (308K)
  • Effect of the surface modifications of LaNi5 on the work function and the initial activation rate
    Sho TAKAHASHI, Fujio SUZUKI, Hirohisa UCHIDA
    2002 Volume 14 Issue 1-2 Pages 77-78
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.77
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    We reported that the alkaline surface treatment using LiOH, NaOH, and KOH markedly decreases the work function for electrons of the alloy surface, and that this effect accelerates the initial activation rate of the LaNi5 alloys. In this study, the effects of the alkaline surface treatment and the surface oxidation on the work function, the initial activation rate, and the surface condition of the LaNi5 alloy were examined.
    View full abstract
    Download PDF (282K)
  • TOF-SIMS surface analysises on LaNi5 after LiOD treatment
    Chika Izawa, Yoshitake NISHI, Hidekazu OKUHIRA, Haru-Hisa UCHIDA
    2002 Volume 14 Issue 1-2 Pages 79-80
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.79
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In the Hydrogen Energy System, hydrogen storage alloy is considered to be an important energy carrier. LiOH pretreatment enhances activation process and also H2 absorption even after oxidation. This reaction mechanism is not clearly explained until now. In this study, the surface of LaNi5 alloy treated by LiOD solution was analyzed by TOF-SIMS. Lager intensity of H was confirmed at the place with higher concentration of Li. Higher raction rate can be explained by this higher H concentration caused by LiOH pretreatment.
    View full abstract
    Download PDF (2660K)
  • Changes in surface wettability on TiO2 thin film and blur free by electron beam irradiation
    Yasunori ISOGAI, Hiroyuki IZAWA, Kazuhiro AKIYAMA, Rie FUJII, Yoshitak ...
    2002 Volume 14 Issue 1-2 Pages 81-82
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.81
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The misting-free has been developed by sheet electron beam irradiation treatment. We studied the effect of sheet electron beam irradiation on blur free property of anatase phase of TiO2 thin film. The sheet electron beam irradiation decreased the contact angle on anatase phase of TiO2 thin film.
    View full abstract
    Download PDF (283K)
  • Effect of Electron Beam on misting free of natural quartz crystal window
    Naoki YAMAGUCHI, Yoshitake NISHI, Kazuya OGURI, Akira TONEGAWA, Keisuk ...
    2002 Volume 14 Issue 1-2 Pages 83-84
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.83
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    We studied effect of electron beam irradiation on time to clear vision of natural quartz crystal. The EB irradiation decreased time to clear vision. Based on the result of ESR, the dangling bond was increased by electron beam irradiation.
    View full abstract
    Download PDF (253K)
  • Development of GaAs photoconductors for submillimeter astronomy
    Liquid Phase Epitaxial Growth of GaAs Layer
    Junichi TSUCHIYA, Moriaki WAKAKI, Osamu ABE, Hiroshi MURAKAMI
    2002 Volume 14 Issue 1-2 Pages 85-86
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.85
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The submillimeter wavelength region is the last undeveloped spectral window in modern astronomy. Our purpose is to develop the photoconductive detector for 300μm band using GaAs epitaxial film. The final goal of our detector development is to obtain a Blocked Impurity Band (BIB) type detector. Ultra pure GaAs films have been grown reproducibly by the sliding boat method of Liquid Phase Epitaxy(LPE). The epitaxial films with the carrier density of 5.6×1013cm-3 and the mobility of 86600cm2/Vs at 77K were grown.
    View full abstract
    Download PDF (252K)
  • A Bio-optical nose for alcohol vapor
    Takuo KON, Yuki HASHIMOTO, Kohji MITSUBAYASHI
    2002 Volume 14 Issue 1-2 Pages 87-88
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.87
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A newly optical gas-sensor was fabricated by immobilizing alcohol oxidase onto a tip-surface of an oxygen sensitive optical fiber with a ruthenium complex. As the results of the batch analysis, the bio-optical nose was possible to use for measuring ethanol vapor concentration. The nose device could be applied for detecting other substances in the gas-phase by changing biocatalysts.
    View full abstract
    Download PDF (277K)
  • Parametric study of a mist-singlet oxygen generator III
    Noriaki TAKAHASHI, Makoto SHIMIZU, Shigeki MUTO, Masamori ENDO, Tomoo ...
    2002 Volume 14 Issue 1-2 Pages 89-90
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.89
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A new type mist-singlet oxygen generator (Mist-SOG) for a chemical oxygen-iodine laser (COIL) has been developed. The Mist-SOG is devoted to make the liquid recirculation unnecessary with the complete reaction through a single pass of basic hydrogen peroxide (BHP). However, the water vapor pressure increases because of the reaction heat in the Mist-SOG is higher than the usual SOG. The pressure is suppressed from 2.2 Torr to 1.3 Torr by using the cooling medium of H2O2.
    View full abstract
    Download PDF (2399K)
  • Doppler ion temperature measurements in ICRF heated sheet plasma
    Kazuya SHIRAISHI, Takehisa SHIBUYA, Masataka ONO, Akira TONEGAWA, Kazu ...
    2002 Volume 14 Issue 1-2 Pages 91-92
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.91
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In a nuclear fusion oriented plasma, divertor plasma plays important roles, such as impurity control and plasma heat treatment. In this research, divertor plasma was simulated using straight line type sheet plasma. Especially, ion temperature that is an important parameter to control impurities is measured by spectroscopic method. As a result of measurement, ion temperature was evaluated from doppler width.
    View full abstract
    Download PDF (303K)
  • Development of a freshness sensor with flavin-containing monooxygenase
    Kazuhisa YANO, Yohei KUBOTERA, Yuki HASHIMOTO, Kohji MITSUBAYASHI, Tak ...
    2002 Volume 14 Issue 1-2 Pages 93-94
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.93
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A freshness sensor for fish and meat was constructed by immobilizing flavin containing monooxygenase type-3 (FMO3) as, one of drug metabolizing enzymes in human liver, to a dissolved oxygen electrode. The FMO3 immobilized sensor was calibrated against trimethylamine solutions (TMA, fish-odor substance) from 1.0 to 50.0mmol/l. As the results of the experiments with fish and meat samples, the sensor output increased by increasing a keeping period at the room temperature for their decomposition.
    View full abstract
    Download PDF (304K)
  • Solar cell production increase scenario coping with petroleum-resources drain
    Haruhito TANAHASHI, Sadao UEGUSA
    2002 Volume 14 Issue 1-2 Pages 95-96
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.95
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    By using energy effectively, human beings built rich material civilization. On the other hand, civilization produced the resources exhaustion problem and the environmental problem. Petroleum exhaustion in the 21st century will restrict an economic activity. In connection with it, it is thought that the energy source of supply by the solar cell etc. clean and stabilized over the future is required. In this paper, the scenario lighting of solar cell production prediction and solar cell production increase was performed. The future state was examined from them.
    View full abstract
    Download PDF (331K)
  • Characteristic of optical response of MMIC
    Tasuku TOYA, Kentarou SAITOU, Tatuo KUWAYAMA, Shigeo KAWASAKI
    2002 Volume 14 Issue 1-2 Pages 97-98
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.97
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this paper, experimental results and simulation results of operating frequency shift are reported by a 10GHz HEMT oscillator with illumination. Resulting from measurement of the illuminated oscillator, it is confirmed that the operating frequency shift depends on illumination intensity. Simulation results of the oscillating with illuminated FET model showed good agreement with experimental results. As a result, the operating frequency can be controlled with illumination intensity parameters.
    View full abstract
    Download PDF (390K)
  • A simulator with a plug-in frame structure for the thin-wire antenna analysis
    Ryosuke SASAKI, Masaharu NOZAWA, Masayoshi TOYODA, Hiroyuki KOIKE, Ryu ...
    2002 Volume 14 Issue 1-2 Pages 99-100
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.99
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this paper, the antenna analysis simulator made by the object oriented programming was reported. This simulator based on a plug-in frame structure was composed by GUI, a FDTD solver and a Moment Method solver. These elements were combined in the plug-in frame by the API. This simulator can work with the solvers using the FDTD and the Moment Method under the identical GUI. Numerical results from each analysis method for a thin-wire antenna were compared.
    View full abstract
    Download PDF (412K)
  • Active integrated antenna for the microwave power transmission of SSPS system
    Noriyuki TERADA, Hiromitsu AOYAMA, Takahiro OHISHI, Yuki YOSHIDA, Shig ...
    2002 Volume 14 Issue 1-2 Pages 101-102
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.101
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    One possible resolution to requirements for SSPS spacetenna as small-size, light-weight, beam control and retrodirectivity is reported. As an effective solution, an active integrated antenna arrays was demonstrated. Two types of the active integrated antenna arrays was made. These operated at 2.45GHz and 5.8GHz. Fundamental operation for beam steering of 20 degree for the retrodirectivity was confirmed.
    View full abstract
    Download PDF (2613K)
  • Millimeter-wave active integrated antenna using the 3D printed PBG structure
    Hideyuki ISHIDA, Ryuta SONODA, Shigeo KAWASAKI
    2002 Volume 14 Issue 1-2 Pages 103-104
    Published: July 31, 2002
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.2978/jsas.14.103
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this report, the implementation and characterization of a millimeter wave Active Integrated Antenna Array is demonstrated, utilizing second harmonics for the MMIC oscillator with the multiple 3D printed PBG structure by etching. The 3D PBG structure is laminated by 2D PBG structure. The PBG was designed by computer program based on the FDTD method. The PBG structure works to suppress the leaked fundamental wave and makes improve performance of the Active Integrated Antenna Array.
    View full abstract
    Download PDF (368K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top