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SUMMARY:BSU Seminar: 'Detecting National\, Regional and Global Changes in 
 Terror Activity' - Dr Sam Tickle\, University of Bristol
DTSTART:20230124T140000Z
DTEND:20230124T150000Z
UID:TALK195112@talks.cam.ac.uk
CONTACT:Alison Quenault
DESCRIPTION:Changepoint detection has received considerable attention in r
 ecent years\, with a myriad of methods arising to address a diverse range 
 of data-intensive situations from genomics to telecommunications. In parti
 cular\, there now exist techniques for streaming data\; high-dimensional s
 ettings\; and instances in which a parametric model cannot be known in adv
 ance. However\, there are relatively few contributions which attempt to ad
 dress all three of these problems simultaneously. We'll discuss these\, al
 ongside a new such method called OMEN\; we will talk about the theoretical
  and empirical properties of OMEN as compared with a suite of standard off
 line change detectors\, before examining the method's performance on the G
 lobal Terrorism Database (GTD). The GTD\, copyrighted to the University of
  Maryland\, and maintained by the National Consortium of the Study of Terr
 orism and Responses to Terrorism (START)\, catalogues terror activity from
  1970 to the present. We will use this resource to pass comment on moments
  in the past fifty years in which the probability of terror activity appea
 red to shift abruptly\, using OMEN to attempt to distinguish between natio
 nal\, regional and global effects.
LOCATION:Large Seminar Room\, East Forvie Building\, Forvie Site\, Robinso
 n Way\, Cambridge CB2 0SR
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