The Normalized Impact Index for Keywords in Scholarly Papers to Detect Subtle Research Topics Daisuke Ikeda author Yuta Taniguchi author Kazunori Koga author 2020-05 aug text Proceedings of the 8th International Workshop on Mining Scientific Publications Petr Knoth editor Christopher Stahl editor Bikash Gyawali editor David Pride editor Suchetha N Kunnath editor Drahomira Herrmannova editor Association for Computational Linguistics Wuhan, China conference publication ikeda-etal-2020-normalized https://aclanthology.org/2020.wosp-1.6/ 2020-05 aug 42 47