title: Collective behaviors of two-component swarms.
abstract: 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.
authors.affiliation: Natural Science Research Institute, Yonsei University, Seoul 120-749, Republic of Korea. skyou@incheon.ac.kr
authors.forename: Sang Koo
authors.initials: SK
authors.lastname: You
authors.forename: Dae Hyuk
authors.initials: DH
authors.lastname: Kwon
authors.forename: Yong-ik
authors.initials: YI
authors.lastname: Park
authors.forename: Sun Myong
authors.initials: SM
authors.lastname: Kim
authors.forename: Myung-Hoon
authors.initials: MH
authors.lastname: Chung
authors.forename: Chul Koo
authors.initials: CK
authors.lastname: Kim
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D017753:Ecosystem; D006126:Group Processes; D008954:Models, Biological; D012919:Social Behavior; D013037:Spatial Behavior