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BEGIN:VEVENT
DTSTAMP:20260914T033630Z
LAST-MODIFIED:20160325T202906Z
DTSTART:20160322T193000Z
DTEND:20160322T203000Z
UID:event1530@bu.edu
URL:http://physics.bu.edu/internal/events/show/1530
SUMMARY:Percolation\, Cascades\, and Control of Networks
DESCRIPTION:Featuring Raissa D’Souza\, UC Davis\nHosted by: David Campbel
	l\nPoster: http://physics.bu.edu/internal//files/download/032216-DSouza.pdf
	\n\nPart of the Physics Department Colloquia Series.\n\nNetworks are at the
	 core of modern society\, spanning physical\, biological and social systems
	. Each distinct network is typically a complex system\, shaped by the colle
	ctive action of individual agents and displaying emergent behaviors. Moreov
	er\, collections of these complex networks often interact and depend upon o
	ne another\, which can lead to unanticipated consequences such as cascading
	 failures and novel phase transitions.  Simple mathematical models of netwo
	rks\, grounded in techniques from statistical physics\, can provide importa
	nt insights into such phenomena.  Here we will cover several such models\, 
	beginning with control of phase transitions in an individual network and th
	e novel classes of percolation phase transitions that result from repeated\
	, small interventions intended to delay the transition. We then move on to 
	modeling phenomena in coupled networks\, including cascading failures and t
	he notion of optimal interdependence. Finally\, we focus on abrupt transiti
	ons due to a system jumping between bi-stable equilibrium\, and show that w
	hen such systems interact we can observe a new phenomena of catastrophe-hop
	ping leading to non-local cascading failures. Here an intermediate system f
	acilitates the propagation of a sudden change or collapse\, and we show tha
	t catastrophe hopping is consistent with the outbreak of protests observed 
	during the Arab Spring of 2011.
LOCATION:SCI 109\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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