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Volume 25 (2013)
- Issue 3+4 Pages 14-
- Issue 1+2 Pages 1-
Volume 25, Issue 3+4
Displaying 1-5 of 5 articles from this issue
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Yurika SUZUKI, Daisuke MIKI, Kumiko MIYAJIMA, Takahiro ARAKAWA, Kohji ...Article type: Paper
2013 Volume 25 Issue 3+4 Pages 14-16
Published: 2013
Released on J-STAGE: August 07, 2015
JOURNAL FREE ACCESSA fiber-optic chemifluorescent immunoassay system for detection of Der f1 was constructed. Der f1 is one of the most important indoor allergens derived from Dermatophagoides farinae. The system measures Der f1 as fluorescence amplified by an enzymatic reaction between labeled enzyme to a detection antibody and fluorescent substrate. The measurement range for Der f1 was from 0.49 to 62.5 ng/ml which was equal to that of the enzyme-linked immunosorbent assay (ELISA). The system showed also high selectivity as the result of the comparison of the sensor outputs between Der f1 and other airborne allergens.View full abstractDownload PDF (432K) -
Kazuma SHIRAISHI, Sho ISHII, Atsushi KASAI, Shigehiro INUI, Yoshihito ...Article type: Paper
2013 Volume 25 Issue 3+4 Pages 17-20
Published: 2013
Released on J-STAGE: June 15, 2016
JOURNAL FREE ACCESSA universal CFRTP/NiCF/Al joint method was suggested for the carbon fiber reinforced thermoplastic ABS polymer (CFRTP)CFRTP)CFRTP)CFRTP)CFRTP)CFRTP) and aluminum (Al) with extremely large friction force induced by broad interface of carbon fibers coated by nickel. The CFRTP/NiCF/Al joint part was strengthened by impregnated nickel-coated carbon fibers (NiCF) to prevent aluminum carbide formation, as well as to enhance the ability of fiber rapping by molten aluminum. The universal universal universal universal universal jointjoint joint exhibited the extremely higher safety level of resistance to tensile stress and apparent hardening modulus at each strain than that of the joint without carbon fiber.View full abstractDownload PDF (644K) -
Naoki HATSUTA, Ken MATSUOKA, Masayuki TAKASHIRIArticle type: Paper
2013 Volume 25 Issue 3+4 Pages 21-24
Published: 2013
Released on J-STAGE: October 30, 2015
JOURNAL FREE ACCESSThis paper describes the fabrication and characterization of bismuth telluride (Bi-Te), bismuth selenide (Bi-Se) and bismuth telluride selenium (Bi-Te-Se) thin films by electrodeposition. We examined the relationship between the mole ratio in the solution and the thermoelectric and structural properties of thin films. The thermoelectric properties, in terms of the electrical conductivity, Seebeck coefficient and power factor, were measured at room temperature. Then, the structural properties such as surface morphology and atomic composition were analyzed. The power factor of Bi-Te, Bi-Se and Bi-Te-Se thin films were achieved 3.1, 13.3 and 10.3 μW/cm/K2, respectively. Although resulting performances were relatively high compared to those of thin films prepare using electrodeposition, there is still room for improvement to optimize the atomic composition of the thin films.View full abstractDownload PDF (808K) -
Shigeto KAWATA, Masafumi OGAWA, Shinjiro UMEZU, Yoshihito KUNUGI, Hito ...Article type: Paper
2013 Volume 25 Issue 3+4 Pages 25-30
Published: 2013
Released on J-STAGE: January 21, 2016
JOURNAL FREE ACCESSThe Dye-Sensitized Solar Cell (DSC) has been attracting the attention of many researchers due to its good characteristics such as low cost, flexibility, and colorful panel. Normally DSC is produced by dipping a titania- coated FTO electrode in the dye solution for over three hours to adsorb dye onto the titania layer of the DSC. We have been investigating fundamental characteristics of the electrostatic inkjet. Ejected droplets are charged because of high voltage application. Since the dye adsorption process depends on charge, charged dye gives a preferable effect to the adsorption process to shorten the adsorption time. In this study, an experimental set-up of an electrostatic inkjet was constructed to print dye on a titania-coated FTO electrode. We have investigated the fundamental characteristics of the dye-printed DSC by changing the printing time. As a result, the printing time was drastically reduced from several hours to about 14 or 15 minutes, and the efficiency proved to be about 5%, which is a comparable value to that made by ordinary production methods.View full abstractDownload PDF (918K) -
Hiroyuki NISHIKAWA, Manabu KURAMOTO, Shigeki OKINO, Fujio SUDAArticle type: Paper
2013 Volume 25 Issue 3+4 Pages 31-37
Published: 2013
Released on J-STAGE: December 24, 2015
JOURNAL FREE ACCESSVarious chaos analyses have been applied for the time series of several human activities. As a result of recurrence plot and power spectrum analyses, three rough classes of the transactions between companies, those between companies and individuals, and those between individuals can be refined according to the geometrical structure of an attractor into three more accurate categories: non-stationary, periodic and stochastic changes. In a stochastic one, the slope of the approximate straight line of the log-log graph of power spectrum density: β ≥ 1.26, and the recurrence plot of its attractor shows non-contiguous diagonal lines; in a periodic one, 0.770 ≤ β ≤ 1.25, equally-spaced diagonals; and in a non-stationary one, 0.108 ≤ β ≤ 0.389, ambiguous boundaries of domain.View full abstractDownload PDF (1847K)
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