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SUMMARY:Exploratory Search and Trend Detection - Gerhard Heyer\, Universit
 ät Leipzig
DTSTART:20141114T120000Z
DTEND:20141114T130000Z
UID:TALK53563@talks.cam.ac.uk
CONTACT:Tamara Polajnar
DESCRIPTION:The talk will present the notion of exploratory search as a me
 ans to go beyond „lookup“\, like learning or investigating (Marchionin
 i 2006)\, and sketch its usefulness in new applications such as _Digital H
 umanities_. In detail\, I want to present a new approach to the analysis o
 f topics and their dynamics over time. Given a large amount of time stampe
 d textual data\, we can identify ”hotly discussed“ concepts by analysi
 ng the rate a term changes context. Adopting the notion of volatility from
  econometrics\, *context volatility* can be used to detect “weak signals
 ” or semantic change independent from pure counts of frequency.
LOCATION:FW26\, Computer Laboratory
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