A Mobile Information Service Adapted to Vague and Situational Requirements of Individual

This study proposes a mobile information service that allows the users who have not yet defined their desired information or whose desired information varies according to the situation to get appropriate information. When the user can specify their desired information to the system explicitly, we develop a "Pull"service. Conversely, when the user cannot verbally specify their desired information to the system, we provide "Push" service and "Don’t disturb" option for the user who does not welcome this service. We consider the characteristics of the environment of mobile terminal to focus on "Time", "Place" and user’s "Preference": long term and short term preference. We also creates rules, algorithms and filtering to this service. Furthermore, the results of experiments verify the idea that different of user desired requires different information services.