著者

岡田 厚 安田 聡

出版者

一般社団法人 日本血栓止血学会

雑誌

日本血栓止血学会誌 (ISSN:09157441)

巻号頁・発行日

vol.32, no.3, pp.303-306, 2021 (Released:2021-06-22)

参考文献数

17

著者

岡田 厚正 山本 恭永 依田 連平

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.73, no.9, pp.1186-1192, 1987-07-01 (Released:2009-06-19)

参考文献数

10

被引用文献数

18

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In this study, eighteen kinds of polycrystalline pure metals were provided to investigate the hot-hardness and the indentation creep characteristics at elevated temperatures.The inflection temperatures where the hot-hardness started to decrease quickly with increasing temperature were observed in the range from 0.35 to 0.68 Tm (where Tm was melting point on the absolute scale), and were calculated as 0.49 Tm on the average.However, in some semi-conductor metals such as Si or Ge, the second inflection temperature appeared.The slope of the plot of logHV-logt (t was indentation creep time in sec.) which was defined as "indentation creep rate" was the largest in Mo and the smallest in Si at 0.60 Tm. There was a tendency for the indentation creep rate to increase linearly with increasing homologous temperature, and the slope of the line was the largest in bcc and it became smaller with fcc and cph systems.On the other hand, in the case of semiconductors the indentation creep rate decreased with increasing temperature up to the second inflection temperature.The activation energies of pure metals calculated from the indentation creep were close to those for selfdiffusion.

著者

金 ヒョン兌 田辺 新一 岡田 厚太郎

出版者

日本建築学会

雑誌

日本建築学会環境系論文集 (ISSN:13480685)

巻号頁・発行日

vol.75, no.654, pp.713-720, 2010-08-30 (Released:2010-10-08)

参考文献数

18

被引用文献数

5 5

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Phthalates are used as plasticizers and flame retardants in building materials and phthalates emitted in indoor environment tend to adhere to house dust. According to Wensing, infants take dust 10times as adults, so an investigation on the concentration of phthalates in house dust is important. This study examined the concentration of phthalate in house dust in Japan and Korea. Specially, Korea house much used polyvinyl flooring as floor product and also used floor heating system during the winter. As a result, the amount of the collected dust per square meter in Japan house was more than the one in Korea house. In addition, the amount of house dust in Japan was more than the one in Korea house, even in under dust 63μm. And the concentration of DEHP in the houses investigated in Korea was higher than 50 percentile in Germany and some Korea houses were higher than 95 percentile in Germany. Japan houses investigated had lower concentration of DEHP in house dust than 95 percentile in Germany, and some house in Japan were lower than 50 percentile in Germany.