著者
中野 不二男 藤田 辰人
出版者
宇宙航空研究開発機構
雑誌
宇宙航空研究開発機構研究開発報告 (ISSN:13491113)
巻号頁・発行日
vol.8, pp.1-8, 2009-03

The technologies obtained through the space activities should be used in various areas including "Humanities study". "Surveillance study by ALOS data on the trace of migration in ancient history" is an experiment to invent a new field as "Space Humanities study". At the ancient time in Japan, how have the people moved, and how have they lived? The history of mankind is coexistence of the movement and settling down. About settling down place, the verification work is still continuing in every ruin. However, in comparison with "Settling down ", the researches in movement are not performed enough. Because the verification work is usually done on the ground, and spots of ruin exist has been replaced to the average maps. On 2D-maps without rich indications of geographical features, it makes difficult to find out and trace the ancient people's footprint between ruin-to-ruin. The bird's-eye view photos by ALOS, which show details of geographical features, are ideal for those verification works. But processing costs of the bird's-eye view photos by ALOS are quite high for students. Using the newly developed software"Daichi no hoko" ,ALOS data , and 3D- software on the market, it becomes capable to show the details of geographical features on 3D-maps. And tracing footprints of ancient people will be possible in low cost. This method is expected to apply for various fields such as cultural anthropology, archeology, and even for amateur historian's personal study.
著者
福重 進也 赤星 保浩 渡辺 圭子 FURUSAWA Naomi KOURA Takao 趙 孟佑 HARADA Shoji 藤田 辰人
出版者
一般社団法人日本機械学会
雑誌
年次大会講演論文集 : JSME annual meeting
巻号頁・発行日
vol.2007, no.5, pp.415-416, 2007-09-07

Space debris impact to solar array causes not only destruction of insulation layer but also impact-induced plasma. This plasma lead to arcing between two points with potential differences on the solar array, for example, high potential cell and low potential cell or substrate with a damage on the insulation layer. Joule heat of this arcing can carbonize insulation layer and create permanent short-circuit path. This is permanent sustained arc. In this study, hypervelocity impact test was conducted to a solar array coupon which was compose of grand potential substrate and high potential cell applied voltage using an external circuit to simulate condition of power generation. We measured temperature and density of plasma created by hypervelocity impact as well as current and voltage of the external circuit in order to evaluate possibility of the permanent sustained arc between high potential cell and substrate on the solar array due to a space debris impact.