TraVis: An Interactive Visualization System for Mining Inbound Traveler Activities by Leveraging Mobile Ad Request Data. - Pei-Xun Wang; Hsuan Chiu; Wen-Qian Chen; Che-Chia Chang; Yu-Hsuan Huang; Tzu-Hao Huang; Yuchun Lai; Chia-Hu Chang (CIKM, 2019)