Journal of Advanced Science
Online ISSN : 1881-3917
Print ISSN : 0915-5651
ISSN-L : 0915-5651
17 巻 , 3+4 号
選択された号の論文の19件中1~19を表示しています
'04 SAS Intelligent Symposium
- インテリジェント材料・ナノテク -
Paper
Letter
- 生命生体理工学 -
Letter
- 有機・高分子材料 -
Paper
Letter
- 機械・材料工学 -
Paper
  • Kyoji TACHIKAWA, Takeshi NAKAZE, Yuuya IKEDA, Osamu IDOHARA, Yoshiaki ...
    2005 年 17 巻 3+4 号 p. 176-180
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    A15 Nb3Al has gained much interests for high-field and large-scale applications due to its excellent critical current density Jc and strain tolerance. However, the shift of Nb3Al composition from stoichiometry at temperatures below 1900°C causes difficulties in the fabrication of conductors with inherent Nb3Al characteristics. In this study, Nb3Al powders prepared by arc melting in an Ar / H2 atmosphere were encased in a sheath and fabricated into tapes through the ex-situ PIT (Powder in Tube) process. The present study revealed that the oxygen content in the Nb3Al powder plays a crucial role in yielding large Jc in the tape. Furthermore, the addition of Ag powder to the Nb3Al powder was found to appreciably enhance the Jc of the tape in lower fields. The superconducting performance of the tapes is discussed in relating to their structures.
  • Yusuke TAKEZAWA, Masami OKAZAKI, Tadaaki AMANO, Mikako TAKEDA, Takashi ...
    2005 年 17 巻 3+4 号 p. 181-184
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    The oxide scale on Fe-3Si alloy was studied in oxygen for 0.03 ∼ 3.72 ks at 1073 K. The formation of blister on the Fe-3Si alloy was observed after oxidation at 1073 K for 0.12 ks. The blister was 100 ∼ 200 μm in size, and its oxide scale was about 1 μm in width. The concentration of oxygen was observed at the underlying surface of blister. The oxide scale on the Fe-3Si alloy was spherical and insular in shape at the early stages of oxidation, and grew laterally, and then changed to planar oxide scale layer.
- 自然・環境エネルギー -
Technical report
- 薄膜・表面物性工学 -
Paper
- その他 -
Letter
Paper
  • Stanislaw M. FILIPEK
    原稿種別: その他
    専門分野: 情報
    2005 年 17 巻 3+4 号 p. 201-208
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    The application of high hydrogen pressure for synthesis of new hydrides, both crystallines and amorphous is briefly described. Properties of novel hydrides, recently obtained for several Laves phases are discussed. Behavior of various hydrides during hydrostatic compression is presented including pressure induced phase transitions and segregation. Parameters of their EOS (Equation of State) are also given and discussed for some hydrides.
  • Takashi ITOH, Tatsuhiro KIMURA, Yoshiaki HAYASAKA, Hiroshi OHSHIMA, Na ...
    2005 年 17 巻 3+4 号 p. 209-217
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    We used a stabilometer to examine development of postural control in 174 school-age boys aged 6-14. Subjects stood upright on a stabilometer for 30 s under both eyes-open and eyes-closed conditions. At that time, we determined the mean location of the center of pressure (CP), the migration area of CP, the migration distance of CP, and the mean migration velocity of CP (VCP) using the measuring instrument. Along with age, the sway in all measuring items decreased under both eyes-open and eyes-closed conditions so that it shows that posture control developed as age advanced. Each measuring item was evaluated according to the ability of discretion by Mahalanobis distance under both eyes-open and eyes-closed conditions. The greatest discretion through all grades was shown for VCP. Nevertheless, VCP decreases more with eyes open than with eyes closed, the difference grows larger between the ages of 9 and 11, indicating that the degree of dependence on visual information in postural control increases during that period. Differences between eyes-open and eyes-closed decrease after age 11; they become constant after age 12, indicating that the ability to maintain a stable posture is obtainable without much use of visual information.
  • Takahiro OKABE, Chika FUTATSUYA, Osamu TANAKA, Takashi OHYAMA
    2005 年 17 巻 3+4 号 p. 218-224
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    Sticky digestive liquid from a carnivorous plant Drosera adelae contains a novel S-like ribonuclease (RNase). In normal plants, S-like RNases corresponding to the D. adelae RNase, which we named DA-I, are induced by phosphate starvation and/or wounding. In this study, the genomic organization of the DA-I gene (da-I) and its 5'-and 3'-flanking sequences were analyzed. The da-I was found to be a gene of single copy in D. adelae. The gene comprises four exons and three introns, with a similarity to the structure of the Class C S-like RNase genes. A nucleotide sequence analysis of the 5'-flanking region revealed that a canonical TATA box sequence (TATAAAT) lies between positions -33 to -27 and a CCAAT box is located between positions -84 to -80 relative to the transcription start site (+1). Although the gene is constitutively transcribed in glandular cells, three wound responsive and two phosphate starvation responsive DNA elements were found within the region between -160 to +2, presenting a riddle regarding the mechanism for the transcriptional regulation of the da-I.
Review
  • Ichiro SHIBASAKI
    2005 年 17 巻 3+4 号 p. 225-240
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    The recent status of research, application, production and the characteristics of InSb and InAs thin film Hall elements are reviewed. Hall elements are now major application area for thin film technology such as vacuum deposition and MBE. Highly sensitive InSb thin filmHall elements formed by vacuum deposition are often applied as magnetic sensors for DC brushless motors used in electronic equipment such as Videotape recorders(VTRs) and personal computers(PCs). InAs thin film and InAs deep quantum well(DQW) Hall elements with high sensitivity and stability over a wide temperature range have been developed by molecular beam epitaxy (MBE). The temperature dependence of InSb single crystal thin films grown on GaAs substrate by MBE were reduced dramatically to very small value by Sn doping as donor impurity. The Hall elements fabricated from the Sn doped InSb single crystal thin films show the very small temperature dependence.
    They have potential for the present and future applications as magnetic sensors required by many electronic systems.
  • Yoshiyuki SEKIYA
    2005 年 17 巻 3+4 号 p. 241-244
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    The carburizing process has been used as surface hardening technology for many years. Carburizing process has been widely used mainly in the machine industry, and has resulted by the end of today.
    Recently, the vacuum carburizing process has attracted attention not only as the conventional gas carburizing process but as a new carburizing method.
    The vacuum carburizing process serves as environment-friendly equipment gentle also to people as compared with the gas carburizing process. And the validity can be found out now also about the difficult heat treatment technology by the conventional method.
    This time, it introduces about the present condition and special carburizing technology of the vacuum carburizing furnace developed in our company.
  • Etsuko HIROTA, Masaru TANAKA, Akira MOCHIZUKI
    2005 年 17 巻 3+4 号 p. 245-249
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    We had already reported poly(2-methoxyetylacrylate) (PMEA) shows good blood compatibility. To clarify this reason we focused on water structure in it and found that PMEA has unique cold-crystallizable water (defined as freezing bound water). The relationship between freezing bound water and blood compatibility was investigated in detail by using MEA copolymer and several poly(methacrylate)s, and it was concluded that this water would play an important roll in PMEA's exhibitting the compatibility.
Exposition
  • Isao TSUKABAYASHI
    2005 年 17 巻 3+4 号 p. 250-253
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    A student's science dislike and losing interest in science pose a graet problem in Japan. It is thought that this problem originates in reduction of the contact by children's natural with urbanization of a living environment in recent Japanes. It is necessary to notify a student about scientific pleasure and interest making science like. I propose to introduce the demonstration experiment to usual physics lecture. We have developed many demonstration experimental aparatuses for physis lecture assist. The outline of two demonstlation experiments are discribed, they are the new type of monkey and hunter, and the ion detection in combustion car engine flame.
  • ―電動弁運転中診断装置―
    Susumu WATANABE
    2005 年 17 巻 3+4 号 p. 254-258
    発行日: 2005年
    公開日: 2007/01/19
    ジャーナル フリー
    Condition Based Maintenance (CBM) for motor-operated valves, which sre used in nuclear power statiions and other plants, requires a real-time monitoring during operation. This highly reliable and rational planned maintenance system can safely reduce theperiodical inspection intervals while cutting down maintenance and labor costs, contributing to reduction of exposure. This developed technology evaluates the soundness correctly, Enabling direct detection of the status in the machine that cannot be checked by conventional Methods. Once the sensor is incorporated into apart of motor-operated valve during the periodical Inspection, status monitoring and degradation tendency management can be made, without need of interrupting the operation and touching the valve, simply by attaching the connectors.
    ?? Compatible with ASME OM
    (Guideline for Condition Maintenaanceby American by Society of Mechanical Engineers)
    ?? Compatible with CNRC GL95-5
    (Recommendation of Nuclear Regulatory Commission on Motor-Operated Valve of Nucelear Power Stations)
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