Collaboration Technologies and Social Computing 25th International Conference, CRIWG+CollabTech 2019, Kyoto, Japan, September 4-6, 2019, Proceedings - Nakanishi, Hideyuki; Nakanishi, Hideyuki; Egi, Hironori; Egi, Hironori; Chounta, Irene-Angelica; Chounta, Irene-Angelica; Takada, Hideyuki; Takada, Hideyuki; Ichimura, Satoshi; Ichimura, Satoshi; Hoppe, Ulrich; Hoppe, Ulrich (Springer International Publishing : Imprint: Springer, 2019)