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- The Journal of the Institute of Electrical Engineers of Japan
Volume 119, Issue 5
Displaying 1-8 of 8 articles from this issue
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Hiroyuki Fujita1999 Volume 119 Issue 5 Pages 269
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSDownload PDF (93K) -
Kazuo Harada1999 Volume 119 Issue 5 Pages 270-278
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSSurface of intact lamina in eggplants was exhibited changes of electric potential when exposed to light. The changes of electric potential was hardly effected on light wavelength, the same patterns were observed with blue, green and red lights. The amplitude of first positive phases ware saturated more than about 100μmol/m2/s of light intensity, and the decrease in response times were obseved with increasing light intensity. But, that of second negative phase was increased as light intensity rised. Like photosynthetic rate, correlation was observed between the amplitude of second negative phase and light intensity, and the second phase of light-induced changes of electric potential and photosynthetic rate were strongly repressed with abscisic acid (ABA).View full abstractDownload PDF (1679K) -
Masayuki Ohyama, Yutaka Tomita, Satoshi Honda, Hitoshi Uchida, Noriyos ...1999 Volume 119 Issue 5 Pages 279-284
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSAn active electrode with a built-in transmitter (a wireless electrode) is developed, which derives surface EMG without skin preparation and conductive paste due to high input impedance. In addition, a reference electrode becomes needless by a built-in stabilized reference circuit. Subjects are less restricted with the present wireless electrode compared with the conventional telemetry system because of no connecting wires between electrodes and the transmitter, and no reference electrode. Moreover, it is not affected by the noise caused by the movement of lead wires. Since the FM transmitter is used in the FM radio band, we can use a commercially available FM radio receiver. The wireless electrode was found to be operated for 29 hours in changes of temperature and with a mechanical shock on the landing moment. Legal license is not required in Japan due to the low transmission power.View full abstractDownload PDF (2455K) -
Youichi Shimizu, Yusuke Furuta, Tohru Yamashita1999 Volume 119 Issue 5 Pages 285-289
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSOptical phosphate-ion sensors based on electrochromism of oxide thin-film electrodes were developed. Among the oxide thin-films tested, it was found that Co3O4 and NiO -based electrodes prepared onto ITO glasses by a sol-gel method showed good sensing performance, i.e., the transmittance at 400-800nm of the electrodes changed reversibly depending on HPO42- concentration under applying anodic electrode potentials. The transmittance change of Co3O4 based element at 620nm was almost linear to the logarithm of the HPO42- concentration between 1.0×10-6 and 1.0×10-2 M at+0.4 V vs. SCE. The 90% response time of the element, when the electrode potential was changed from +0.4 to 0 V vs. SCE at 1.0×10-2 M, was about 50s at room temperature.View full abstractDownload PDF (1044K) -
Toshiyuki Tsuchiya, Jiro Sakata1999 Volume 119 Issue 5 Pages 290-294
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSA new chucking system for tensile testing of insulating thin films using electrostatic force has been developed. The free end of a cantilever beam specimen has an electrode, which is fix to a probe on which a pair of electrodes is fabricated to apply the voltage. The system is applied to tensile testing of plasma CVD SiO2 thin films. The tested part of the specimen is 0.65μm thick, 1-5μm wide and 30-300μm long. The mean tensile strength of the specimen is 1.6-2.3GPa depending on the specimen size. The strength is higher than that of the bulk materials. The fracture toughness of the film is 1.4-2.0MPa√m, which is calculated from the fracture strength of notched specimens.View full abstractDownload PDF (4479K) -
Takayuki Kimuara, Hiromitsu Shiraki, Takanori Arano, Noboru Takatsuka1999 Volume 119 Issue 5 Pages 295-301
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSThe saturation signal level of a photodiode with vertical overflow drain, that is generally used in CCD image sensors, depends markedly on a substrate impurity concentration. The relation between them was obtained analytically, for the first time. The analytical result was compared with that of a 3 dimensional numerical analysis to examine the applicability of the analytical solution. Results of the two analyses coincided qualitatively. To examine subsrate impurity fluctuation, the relation between saturation signal and substrate impurity concentration, that was obtained from the 3 dimensional analysis, was applied to a saturated horizontal line signal that was obtained from a CCD image sensor made on a peripheral region of a 5 inch CZ wafer.
The substrate impurity fluctuation of the sensor was estimated to be ±65.7%. Also, an unique photodiode structure was proposed to minimize the effect of the substrate impurity cocentration fluctuation on the saturated signal fluctuation.View full abstractDownload PDF (2039K) -
Youiti Yamamoto, Keiji Taniguchi, Yutaka Nakano, Hiroaki Yamamoto, Yos ...1999 Volume 119 Issue 5 Pages 302-309
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSThis paper describes a new method for measuring the charge-to-mass ratio q/m of a spherical toner particle. Forces which act on this particle put on the gap space of the parallel electrodes consist of the following three components: adhesion, gravity and Coulomb forces. By the movement of the toner particle under these conditions, the charge-to-mass ratio q/m is calculated by the formula 2gd/(V1-V2), where V1, V2, d and g are the voltage applied across parallel (upper and lower) electrodes in the case that the toner particle put on the lower electrode is lifted toward the upper one, the voltage in the case that the toner particle is backed again to the lower one, the air gap distance between the two electrodes and the acceleration of gravity, respectively. This technique is very simple and accurate in comparison with the traditional one, though its application is limited to spherical toner particles.View full abstractDownload PDF (4244K) -
Makoto MITA, Yoshio MITA, Hiroshi TOSHIYOSHI, Hiroyuki FUJITA1999 Volume 119 Issue 5 Pages 310-311
Published: May 01, 1999
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSDownload PDF (2074K)
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