Artificial Intelligence Applications and Innovations 15th IFIP WG 12.5 International Conference, AIAI 2019, Hersonissos, Crete, Greece, May 24-26, 2019, Proceedings - MacIntyre, John; MacIntyre, John; Maglogiannis, Ilias; Maglogiannis, Ilias; Iliadis, Lazaros; Iliadis, Lazaros; Pimenidis, Elias; Pimenidis, Elias (Springer International Publishing : Imprint: Springer, 2019)