Kazumichi Ohtsuka

Learn More
In this paper, two important factors which affect the pedestrian outflow at a bottleneck significantly are studied in detail to analyze the effect of an obstacle setup in front of an exit. One is a conflict at an exit when pedestrians evacuate from a room. We use floor field model for simulating such behavior, which is a well-studied pedestrian model using(More)
Models for the simulation of pedestrian dynamics and crowds of pedestrians have already been successfully applied to several scenarios and case studies, off-the-shelf simulators can be found on the market and they are commonly employed by end-user and consultancy companies. However, these models are the result of a first generation of research efforts(More)
This paper introduces the first experiments of an innovative approach to the modeling and simulation of crowds of pedestrians considering the presence of groups as a crucial element influencing overall system dynamics. In-silico experimental results are discussed in relation to in-vitro experiments (experimental observations on the movement of pedestrians(More)
The simulation of pedestrian dynamics is a consolidated area of application for agent-based models: successful case studies can be found in the literature and off-the-shelf simulators are commonly employed by decision makers and consultancy companies. These models, however, generally do not consider the explicit representation of pedestrians aggregations(More)
We study a three-state stochastic particle system on the square lattice, which extends the contact process. The phase diagram is analyzed by the mean-field approximation, the pair approximation, and numerics. The pair approximation turns out to be better than the meanfield ansatz. We also show that the Harris-FKG type correlation inequalities approximately(More)
The simulation of pedestrian dynamics is a consolidated area of application for agent-based models: successful case studies can be found in the literature and off-the-shelf simulators are commonly employed by decision makers and consultancy companies. These models, however, generally do not consider the explicit representation of pedestrians aggregations(More)
Daichi Yanagisawa1,2, Yushi Suma1, Akiyasu Tomoeda3,4, Ayako Kimura5, Kazumichi Ohtsuka4, and Katsuhiro Nishinari4,6 1Department of Aeronautics and Astronautics, School of Engineering, The University of Tokyo. 2Research Fellow of the Japan Society for the Promotion of Science. 3Meiji Institute for Advanced Study of Mathematical Sciences, Meiji University.(More)
  • 1