“JSTOR usage data and what it can tell us about ourselves: is there predictability based on historical use by libraries of similar size?”. OCLC Systems
butterfly effect)という表現は、気象学者のエドワード・ローレンツが1972年にアメリカ科学振興協会で行った講演のタイトル Predictability: Does the Flap of a Butterfly's Wings in Brazil Set Off a Tornado in