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SUMMARY:SpaTeC: Spatio-Temporal Reasoning with Composite Events in Mobile 
 Systems - Dr Scarlet Schwiderski-Grosche (Royal Holloway\, UoL)
DTSTART:20081104T143000Z
DTEND:20081104T153000Z
UID:TALK15001@talks.cam.ac.uk
CONTACT:Pedro Brandao
DESCRIPTION:In mobile systems\, the requirements on composite event detect
 ion are fundamentally different to those in distributed systems. Composite
  event detection must be driven not just by the time of occurrence of an e
 vent\, but also by its location of occurrence.\nHence\, the theory of comp
 osite event detection\, as applied in traditional distributed event-based 
 systems\, needs to be reassessed. In this talk\, I motivate the need for s
 patio-temporal reasoning with composite events in mobile systems and intro
 duce _SpaTeC_\, a composite event language that enables simultaneous reaso
 ning over event occurrences in space and time. Composite event operators p
 rovide for coarse spatio-temporal reasoning.\nSpatial and temporal restric
 tions constrain composite event detection in space and time and provide a 
 basis for event filtering and spatio-temporal routing. Time and location s
 tamps use a guaranteed bounds model for location estimation and time synch
 ronisation. The\nsemantics of _SpaTeC_ event operators is defined accordin
 gly.
LOCATION:Room FW11\, Computer Laboratory\, William Gates Building
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