Unifying Themes in Complex Systems IX Proceedings of the Ninth International Conference on Complex Systems - Morales, Alfredo J.; Morales, Alfredo J.; Gershenson, Carlos; Gershenson, Carlos; Braha, Dan; Braha, Dan; Minai, Ali A.; Minai, Ali A.; Bar-Yam, Yaneer; Bar-Yam, Yaneer (Springer International Publishing : Imprint: Springer, 2018)