1. TwiNews: Detect local user
interests in Twitter to re-
rank news
Xin Shuai
Tuesday, October 8, 2013

2. Tuesday, October 8, 2013

3. Tuesday, October 8, 2013

4. Top ranked
news
may not satisfy
all users
from different
geographical
locations!
Tuesday, October 8, 2013

5. Not
relevant to
China!
Tuesday, October 8, 2013

6. Word Closeness Local User Interests
Tuesday, October 8, 2013

7. How to detect the local user
interests given a news query?
Tuesday, October 8, 2013

8. How to detect the local user
interests given a news query?
Tuesday, October 8, 2013

9. Tuesday, October 8, 2013

10. Tuesday, October 8, 2013

11. Can we provide localized news
ranking for users by leveraging
geographical tweets?
Tuesday, October 8, 2013

12. Tuesday, October 8, 2013

13. LDA
topic model
topic 1
technology:
mobile
iphone
facebook
topic 2
economy:
market
stock
investor
Tuesday, October 8, 2013

14. LDA
topic model
topic 1
technology:
mobile
iphone
facebook
topic 2
economy:
market
stock
investor
tweet 1
tweet 2
tweet n
topic 1 topic 2
Tuesday, October 8, 2013

15. LDA
topic model
topic 1
technology:
mobile
iphone
facebook
topic 2
economy:
market
stock
investor
tweet 1
tweet 2
tweet n
topic 1 topic 2
local topical
distribution
+
+
+
technology (topic 1)
Tuesday, October 8, 2013

16. LDA
topic model
topic 1
technology:
mobile
iphone
facebook
topic 2
economy:
market
stock
investor
tweet 1
tweet 2
tweet n
topic 1 topic 2
local topical
distribution
+
+
+
technology (topic 1)
Tuesday, October 8, 2013

17. LDA
topic model
topic 1
technology:
mobile
iphone
facebook
topic 2
economy:
market
stock
investor
tweet 1
tweet 2
tweet n
topic 1 topic 2
news 1
news 2
news 3
technology (topic 1)
local topical
distribution
+
+
+
technology (topic 1)
Tuesday, October 8, 2013

18. LDA
topic model
topic 1
technology:
mobile
iphone
facebook
topic 2
economy:
market
stock
investor
tweet 1
tweet 2
tweet n
topic 1 topic 2
news 1
news 2
news 3
technology (topic 1)
local topical
distribution
+
+
+
technology (topic 1)
cosine
similarity
cosine
similarity
cosine
similarity
Tuesday, October 8, 2013

19. A/B Testing
TwiNews
30 queries, 2 weeks
100 turkers from CA & NY
+3%
+7%
t-test: p < 0.05
A
B
Tuesday, October 8, 2013

20. GibbsLDA++
Tuesday, October 8, 2013

21. localized news ranking
localized user interests
from Twitter
Tuesday, October 8, 2013

22. localized news ranking localized targeted advertising
localized user interests
from Twitter
Tuesday, October 8, 2013

23. localized news ranking localized targeted advertising
localized deal recommendation
localized user interests
from Twitter
Tuesday, October 8, 2013

24. localized news ranking localized targeted advertising
localized deal recommendation
localized user interests
from Twitter
localized music/movie recommendation
Tuesday, October 8, 2013

25. Xin Shuai
Tuesday, October 8, 2013

26. LDA topic modeling
LDA (Latent Dirichlet Allocation)
Tuesday, October 8, 2013

27. LDA topic modeling
LDA (Latent Dirichlet Allocation)
topic 1:
mobile
iphone
facebook
ipad
topic 2:
market
stock
index
investor
topic 3:
....
....
....
Tuesday, October 8, 2013

28. Amazon Mechanical Turk
Price: eleven cents/HITS
Total Cost: over 200 dollars
Tuesday, October 8, 2013

29. Tuesday, October 8, 2013

30. Tuesday, October 8, 2013

31. Tuesday, October 8, 2013

32. Tuesday, October 8, 2013