@article{oai:ipsj.ixsq.nii.ac.jp:00240476, author = {Sora, Okamoto and Tomoya, Kawakami and Sora, Okamoto and Tomoya, Kawakami}, issue = {3}, journal = {情報処理学会論文誌コンシューマ・デバイス&システム(CDS)}, month = {Oct}, note = {In Japan, tsunamis and landslides are frequently caused as secondary disasters after earthquakes, and early evacuation is an important issue to reduce the damage. In this study, the authors propose a method to reduce the number of evacuation messages based on geographical information while maintaining the time to complete evacuation using social graphs. We define evacuation target areas and evacuate only designated targets within these areas. The proposed method relays evacuation status only when there is a person (node) within the evacuation area. This method reduces the number of messages while maintaining the evacuation completion time. The evaluation results confirmed that the proposed method can reduce the number of messages during evacuation while maintaining the time required to complete the evacuation, compared to the case where all nodes outside the evacuation target area relay the evacuation status and the case where no relay is performed. ------------------------------ This is a preprint of an article intended for publication Journal of Information Processing(JIP). This preprint should not be cited. This article should be cited as: Journal of Information Processing Vol.32(2024) (online) ------------------------------, In Japan, tsunamis and landslides are frequently caused as secondary disasters after earthquakes, and early evacuation is an important issue to reduce the damage. In this study, the authors propose a method to reduce the number of evacuation messages based on geographical information while maintaining the time to complete evacuation using social graphs. We define evacuation target areas and evacuate only designated targets within these areas. The proposed method relays evacuation status only when there is a person (node) within the evacuation area. This method reduces the number of messages while maintaining the evacuation completion time. The evaluation results confirmed that the proposed method can reduce the number of messages during evacuation while maintaining the time required to complete the evacuation, compared to the case where all nodes outside the evacuation target area relay the evacuation status and the case where no relay is performed. ------------------------------ This is a preprint of an article intended for publication Journal of Information Processing(JIP). This preprint should not be cited. This article should be cited as: Journal of Information Processing Vol.32(2024) (online) ------------------------------}, title = {A Message Reduction Scheme Based on Geographical Information in Initiative-evacuation Induction Using Social Graphs}, volume = {14}, year = {2024} }