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BEGIN:VEVENT
DTSTAMP:20260817T073045Z
LAST-MODIFIED:20170320T173732Z
DTSTART:20170511T140000Z
DTEND:20170511T150000Z
UID:event1749@bu.edu
URL:http://physics.bu.edu/internal/events/show/1749
SUMMARY:Greed Could be Dangerous: Statistical physics of Stochastic Search 
	and Lattice Foraging
DESCRIPTION:Featuring Uttam Bhat\n\nPart of the PhD Final Oral Exams.\n\nDi
	ssertation Committee: Sid Redner\, Martin Schmaltz\, Shyam Erramilli\, Clau
	dio Chamon\, Andrei Ruckenstein\n\nAbstract:\n\nAbstract: As the proverbial
	 title suggests\, we find surprising results on lifetimes of random-walking
	 lattice foragers. The set-up is as follows. A random-walking forager is in
	itially on an `Eden' lattice filled with food at every-site\, which is depl
	eted as the forager hops from site to site. This forager has a limit on how
	 many steps it can go without food\, after which\, the forager starves to d
	eath. It also has the ability to detect food in its nearest neighboring sit
	es. It turns out\, acting greedily on this information (i.e.\, biasing its 
	steps towards nearest neighbors with food)\, can actually hurt the lifetime
	 of the lattice forager in one and two-dimensions giving rise to a mean-lif
	etime that depends non-monotonically on such a bias. \n  In a broader conte
	xt\, we study stochastic search and foraging. We use first-passage ideas an
	d develop exact analytic and heuristic tools to study two related systems\,
	 one rich with resources and the other where resources are sparse. These mo
	dels not only serve as simple models of foraging\, but also serve as archet
	ypes of non-equilibrium statistical physical processes.\n\n![Uttam](/resour
	ces/event-image/1749/21ac841_small)
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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