著者
谷津 陽一 片岡 淳 五十川 知子 河合 誠之 水野 恒史 釜江 常好 田島 宏康 高橋 忠幸 斉藤 芳隆 郡司 修一 Yatsu Yoichi Kataoka Jun Ikagawa Tomoko Kawai Nobuyuki Mizuno Tsunefumi Kamae Tsuneyoshi Tajima Hiroyasu Takahashi Tadayuki Saito Yoshitaka Gunji Shuichi
出版者
宇宙航空研究開発機構宇宙科学研究本部
雑誌
第4回宇宙科学シンポジウム = Proceedings of the 4th Space Science Symposium
巻号頁・発行日
pp.453-455, 2004-08

X線、ガンマ線の偏光はほとんど全ての高エネルギー天文現象と関連し、その物理を研究するための有力なプローブである。しかしながら、これまでの観測例は10keV以下では1970年代のかに星雲、10keV以上ではガンマ線バーストのみである。そこで、30〜200keVの領域での世界初の偏光観測を目標とし気球実験を行う予定であり、これに搭載するためのWell-type硬X線偏光PoGO(Polarized Gamma-ray Observer)の開発を行っている。
著者
Masataka Nobuo Hayakawa Sachiko Kawai Nobuyuki
出版者
Public Library of Science
雑誌
PloS one (ISSN:19326203)
巻号頁・発行日
vol.5, no.11, 2010-11
被引用文献数
2

Humans as well as some nonhuman primates have an evolved predisposition to associate snakes with fear by detecting their presence as fear-relevant stimuli more rapidly than fear-irrelevant ones. In the present experiment, a total of 74 of 3- to 4-year-old children and adults were asked to find a single target black-and-white photo of a snake among an array of eight black-and-white photos of flowers as distracters. As target stimuli, we prepared two groups of snake photos, one in which a typical striking posture was displayed by a snake and the other in which a resting snake was shown. When reaction time to find the snake photo was compared between these two types of the stimuli, its mean value was found to be significantly smaller for the photos of snakes displaying striking posture than for the photos of resting snakes in both the adults and children. These findings suggest the possibility that the human perceptual bias for snakes per se could be differentiated according to the difference of the degree to which their presence acts as a fear-relevant stimulus.