Journal of Advanced Science
Online ISSN : 1881-3917
Print ISSN : 0915-5651
ISSN-L : 0915-5651
24 巻 , 3+4 号
選択された号の論文の3件中1~3を表示しています
Paper
  • MERA Saori, TANAKA Suguru, TONEGAWA Akira, KAWAMURA Kazutaka, SATO Koh ...
    原稿種別: Paper
    2012 年 24 巻 3+4 号 p. 37-40
    発行日: 2012年
    公開日: 2014/07/08
    ジャーナル フリー
    Nuclear fusion is expected as one of the future energy source. Deuterium and Tritium are fuels. But most unreacted fuel is exhausted out of fusion reactor. Especially, Tritium is radioisotope and rarely exists in nature, so fuels recovery is necessary. Therefore, we propose a separation on divertor region by using hydrogen storage material. In this study, we have proposed fuel particles recovering on divertor with titanium in the type of a hydrogen storage material by using divertor simulator TPD-SheetIV via deuterium plasma. After deuterium plasma exposures, the samples were analyzed by thermal desorption spectroscopy (TDS). The temperatures of the samples were increased up to 1093K. As a result, the TDS measurement shows that deuterium is retained.
  • SASAKI Kaito, MIYARA Masahiko, KITA Rio, SHINYASHIKI Naoki, YAGIHARA S ...
    原稿種別: Paper
    2012 年 24 巻 3+4 号 p. 41-44
    発行日: 2012年
    公開日: 2014/07/08
    ジャーナル フリー
    Dielectric relaxation process of water was investigated for 30 wt% gelatin-water mixture at frequencies between 1 MHz and 50 GHz in subzero temperatures down to -50 oC. Below the melting temperature Tm, part of water crystallized and another part of water, uncrystallized water (UCW) , remained in a liquid state with gelatin in an uncrystallized phase. At Tm, the relaxation strength, relaxation time, and relaxation time distribution change adruptly, and their subsequent changes with decreasing temperature are larger than those above Tm. These large temperature dependences below Tm can explained by the increase in gelatin concentration in the uncrystallized phase Cg,UCP with decreasing temperature.
  • NAKAMURA Hiroyuki, KIMURA Tatsuhiro, YAZAKI Koji, OHSHIMA Hiroshi, KAN ...
    原稿種別: Paper
    2012 年 24 巻 3+4 号 p. 45-51
    発行日: 2012年
    公開日: 2014/07/08
    ジャーナル フリー
    It is generally admitted that alcohol drinking elicits the decline of cognitive function. There was little literature mentioned about the relationship between cognitive level and alcohol intake in a quantitative way. The P300 is one of the event related potentials (ERP) and can be used for the indicator of cognitive function. The P300 evoked by auditory Odd-ball task was measured in 10 volunteers. After baseline measurement, the subjects drank alcohol, equivalent to 350 mL of beer (17.5mL of ethanol). Five minutes later, the breath alcohol concentration was checked, and P300 was recorded. If needed, the additional 350mL of beer or equivalent ethanol containing beverages was taken, and P300 was measured repeatedly until the breath concentration reached 1mg⁄L or the participants or⁄and researchers felt that volunteers got drunk enough for the safety. After alcohol loading, the latencies of P300 were significantly prolonged (p<0.001). This phenomenon means a delay of the recognition. Also, the amplitudes of P300 were significantly reduced (p<0.005). This indicates a fall of the cognitive level. Moreover, the positive relationship between the breath alcohol concentrations and delays of P300 latency was clearly observed (p<0.05). This relation was also admitted in the declines of P300 amplitude and breath alcohol levels (p<0.05). It was confirmed that cognitive function decreased in proportion to the amount of the alcohol drinking.
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