Collective behaviors of two-component swarms.
We present a particle-based simulation study on two-component swarms where there exist two different types of groups in a swarm. Effects of different parameters between the two groups are studied systematically based on Langevin's equation. It is shown that the mass difference can introduce a protective behavior for the lighter members of the swarm in a vortex state. When the self-propelling strength is allowed to differ between two groups, it is observed that the swarm becomes spatially segregated and finally separated into two components at a certain critical value. We also investigate effects of different preferences for shelters on their collective decision making. In particular, it is found that the probability of selecting a shelter from the other varies sigmoidally as a function of the number ratio. The model is shown to describe the dynamics of the shelter choosing process of the cockroach-robot mixed group satisfactorily. It raises the possibility that the present model can be applied to the problems of pest control and fishing using robots and decoys.
You
Sang Koo
SK
Natural Science Research Institute, Yonsei University, Seoul 120-749, Republic of Korea. skyou@incheon.ac.kr
Kwon
Dae Hyuk
DH
Park
Yong-ik
YI
Kim
Sun Myong
SM
Chung
Myung-Hoon
MH
Kim
Chul Koo
CK
D000818:Animals; D001522:Behavior, Animal; D017753:Ecosystem; D006126:Group Processes; D008954:Models, Biological; D012919:Social Behavior; D013037:Spatial Behavior