著者

安元 培 田中 武雄 福田 和悟

出版者

大阪産業大学

雑誌

大阪産業大学論集. 自然科学編 (ISSN:02871394)

巻号頁・発行日

vol.124, pp.21-30, 2013-03

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The thermoluminescence (TL) of Ca_5(PO_4)_3Cl doped with Pr ions has been studied for use as a thermoluminescence dosimeter (TLD) material. The TL glow spectra of Ca_5(PO_4)_3Cl:Pr irradiated with UV ray show a liner relation between TL glow intensity and irradiation time. In the case of X ray irradiation, the TL spectra also show a same relation but show a different shape of spectrum. These results suggest that the TLD consisting of Ca_5(PO_4)_3Cl:Pr may be possible to discriminate between UV and X rays. It was found that with Ca_5(PO_4)_3Cl:Pr, the shape of the TL glow curve for UV radiation is different from that of the TL glow curve for X ray radiation. It seemed interesting to investigate the mixed radiation field, and TL and thermally stimulated exoelectron emission (TSEE) measured simultaneously for X ray irradiation. However, TSEE was not observed.

著者

玉野 富雄 金岡 正信

出版者

大阪産業大学

雑誌

大阪産業大学論集. 自然科学編 (ISSN:02871394)

巻号頁・発行日

vol.125, pp.1-22, 2015-03

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Considering Japanese construction culture before the Meiji era, the castle masonry walls in the modern age are without equal in the world. The Osaka Castle masonry wall in the Tokugawa period represents an extremely excellent and unparalleled construction culture in the world from the point of view of the beauty of the structure observed in the corner wall profile curve, as well as the wall curved surface, and the mechanical rationality as the structural form. That is a magnificent and graceful construction culture which was uniquely developed and accomplished in Japan. This paper presents the technical history of the Osaka Castle masonry walls, discussing the historical and scientific studies on the masonry walls in the Toyotomi period and in the Tokugawa period.

著者

入江 満

出版者

大阪産業大学

雑誌

大阪産業大学論集. 自然科学編 (ISSN:02871394)

巻号頁・発行日

vol.126, pp.53-63, 2016-02

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In the era of digital big data, the users demand a stable preservation method of a huge digital information data. Today, we have three digital data storage media-type; Solid state (semiconductor,SRAM etc.), Magnetic (HDD, Tape) and Optical discs (CD, DVD, BD). Otherwise, in the today's carbon-conscious society, the optical disc technology be refocused on archiving solution for digital data information. Then, Recordable optical disc in professional use would be the most promising one in those digital storage media. This paper reports discussion of the life expectancy evaluation method of optical disk for data archiving based on the ISO/IEC standard.In the era of digital big data, the users demand a stable preservation method of a huge digital information data. Today, we have three digital data storage media-type; Solid state (semiconductor,SRAM etc.), Magnetic (HDD, Tape) and Optical discs (CD, DVD, BD). Otherwise, in the today's carbon-conscious society, the optical disc technology be refocused on archiving solution for digital data information. Then, Recordable optical disc in professional use would be the most promising one in those digital storage media. This paper reports discussion of the life expectancy evaluation method of optical disk for data archiving based on the ISO/IEC standard.