著者
趙 姍姍
巻号頁・発行日
2014-06-30

Hokkaido University(北海道大学). 博士(法学)
著者
横山 茂雄
出版者
京都大学
巻号頁・発行日
1998-05-25

要旨pdfファイル:学位授与日「平成10年11月24日」
著者
趙 慶済
出版者
立命館大学法学会
雑誌
立命館法学
巻号頁・発行日
vol.350, pp.2026-2106, 2013
著者
Uthongsap Kanokwan
巻号頁・発行日
2012

制度:新 ; 報告番号:甲3675号 ; 学位の種類:博士(学術) ; 授与年月日:2012/6/11 ; 早大学位記番号:新6043
著者
Yamamichi Masato Yoshida Takehito Sasaki Akira
出版者
Ecological Society of America
雑誌
Ecology (ISSN:00129658)
巻号頁・発行日
vol.95, no.8, pp.2303-2315, 2014-08
被引用文献数
18

Theory of invasion ecology indicates that the number of invading individuals (propagule size) and the timing of invasion are important for invasion success. Propagule size affects establishment success due to an Allee effect and the effect of demographic stochasticity, whereas the timing of invasion does so via niche opportunity produced by fluctuating predation pressure and resource abundance. We propose a synthesis of these two mechanisms by a time-varying dose–response curve where the dose is propagule size and the response is establishment probability. We show an example of the synthesis in a simple predator–prey model where successful invasion occurs as a demographic regime shift because of the bistability of the system. The two mechanisms are not independent, but simultaneously determine invasion success in our model. We found that positive growth rate of an invading species does not ensure its establishment, especially when its propagule size is small or when its growth rate is in a decreasing trend. We suggest the difficulty of understanding invasion process based on a dose–response curve of propagule size as no unique curve can be determined due to the effects of invasion timing (i.e., the threshold of demographic regime shift is time varied). The results of our model analysis also have an implication on the phase relationship between population cycles of predators and prey.
著者
別所 裕介 海老原 志穂
出版者
京都大学大学院文学研究科言語学研究室
雑誌
京都大学言語学研究 (ISSN:13497804)
巻号頁・発行日
vol.26, pp.77-91, 2007-12-25

dPa' ris Dialect of Tibetan is spoken in Tianzhu county, Gansu Province, China. Tibetan spoken in China can be divided into three major dialects: Central, Kham and Amdo. dPa' ris dialect belongs to Amdo Tibetan. Tianzhu county is situated at the east end of the Qinghai-Tibet highlands, which is why people in Tianzhu county have been subjected to the cultural contact with Han Chinese. People living at low altitudes in particular are subject to the influence of the sinosphere. In this situation, the number of dPa' ris dialect speakers is on a declining trend. In this note, we will report on the social background which surrounds dPa' ris dialect (1. history and geography of Tianzhu county, 2. ethnic distribution, 3. language use of dPa' ris dialect), and some data on language itself (4. previous work on dPa' ris dialect, 5. phonological description).
著者
Ojima Nobuhiko
巻号頁・発行日
2005-09-05

報告番号: 乙16315 ; 学位授与年月日: 2005-09-05 ; 学位の種別: 論文博士 ; 学位の種類: 博士(農学) ; 学位記番号: 第16315号 ; 研究科・専攻: 農学生命科学研究科
著者
常行 真司
出版者
物性研究刊行会
雑誌
物性研究 (ISSN:08272997)
巻号頁・発行日
vol.81, no.5, pp.749-760, 2004-02-20

この論文は国立情報学研究所の電子図書館事業により電子化されました。