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UID:20260803T031220EDT-379899Ojnr@132.216.98.100
DTSTAMP:20260803T071220Z
DESCRIPTION:Theodore Kolokolnikov\nDalhousie University\nAnimal groups ofte
 n form striking aggregation patterns. Examples\ninclude from schools of fi
 sh to locust swarms\, to patterns in\nbacterial cultures. In this talk\, w
 e discuss a very simple model of\nswarming based on pairwise particle inte
 ractions with short-range\nattraction and long-range repulsion\, which can
  lead to very complex\nand intriguing patterns in two dimensions. Dependin
 g on the\nrelative strengths of attraction and repulsion\, a multitude of
 \nvarious patterns are observed\, from nearly-constant density swarms\nto 
 annular solutions\, to complex N-fold symmetry patterns. We show\nthat ann
 ular-type patterns may form if short-range repulsion is\nsufficiently weak
 . A Turing-type analysis of such annular states\nfurther reveals a wealth 
 of possible instabilities which often lead\nto complicated and beautiful p
 atterns. We also consider an inverse\nproblem: given a target pattern\, ho
 w to custom-design the force\ninteraction to obtain said pattern as a stea
 dy state.\n
DTSTART:20110321T200000Z
DTEND:20110321T200000Z
LOCATION:Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue Sherbrooke 
 Ouest
SUMMARY:Particle interaction models of biological aggregation
URL:/channels/event/particle-interaction-models-biolog
 ical-aggregation-171340
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