Katsuyoshi Hata

  • Citations Per Year
Learn More
Keygraph is a visualization tool for discovery of relations among text-based data. This paper discusses a new application of KeyGraph for discovery of player characteristics in Massively Multiplayer Online Games (MMOGs). To achieve high visualization ability for this application, we propose a preprocessing method that aggregates action symbol sub-sequences(More)
AIS (ship-borne automatic identification system) is a system that enables a ship to get information about encountered ships, such as their position, course, speed, name etc. automatically by VHF radio transmission. The system is expected to contribute the improvement of marine traffic control and safety. In some congested waterways overloaded/conflicted(More)
Automatic identification system (AIS) is a system that enables ships to exchange information about ships and navigation, such as position, course, speed, name etc. automatically by VHF radio. The system is expected to contribute the improvement of marine traffic control and safety. In some congested waterways excessive transmission of AIS is a potential(More)
  • 1