1. Issue Signatures (1) speeches, news stories, video tags, etc. – {0.1528,0.0072,…,0.0220} aggregate (mean) for candidate, party, state, time period, media type, etc. vector space model: tf-idf weights; cosine similarity reduces documents of arbitrary length to fixed- length lists of numbers G. Salton, A. Wong, and C. S. Yang (1975), "A Vector Space Model for Automatic Indexing," Communications of the ACM, vol. 18, nr. 11, pages 613–620 April 4, 2008IGERT-IDM Seminar1

2. Issue Signatures (1) Service to America Thank you. It's good to be back in Meridian. As you might know, I was once a flight instructor here at the air field named for my grandfather during my long past and misspent youth. And it's always good to be in Mississippi, which you could call my ancestral home. Generations of McCains were born and raised in Carroll County, on land that had been in our family since 1848. The last McCain to live on the property, which the family called Teoc, was my grandfather's brother, Joe McCain. I spent a couple summers here as a young boy, and enjoyed it immensely. I had never had a permanent address because my father's naval career required us to move frequently. But here, in the care of my very likeable Uncle Joe, I could imagine, with a little envy, what it must have been like for the McCains who came before me to be so connected to one place; to be part of a community and a landscape as well as a family. 1abortion 4gun control 5economy 5.1spending 5.2taxes 5.3poverty 5.5social security 5.6the middle class 5.9research spending 6education 7energy policy 7.1energy independence 8environment 8.1global warming 9health care 10homeland security 11immigration 12judicial activism 13.1veterans 14political reform 16global image 18iraq war 19war on terror 20foreign policy 21defense policy 23election reform 24faith and politics 26women's rights 27families 28space program 29agriculture 30service 31civil rights 32disabilities

3. Issue Signatures (3) sum of the dot product ------------------------------------------------------ product of the euclidean ‘distances’ http://www.miislita.com/information-retrieval-tutorial/cosine-similarity-tutorial.html

4. Issue Signatures (3)

5. Preliminary Results (1) April 4, 2008IGERT-IDM Seminar5 1abortion 4gun control 5economy 5.1spending 5.2taxes 5.3poverty 5.5social security 5.6the middle class 5.9research spending 6education 7energy policy 7.1energy independence 8environment 8.1global warming 9health care 10homeland security 11immigration 12judicial activism 13.1veterans 14political reform 16global image 18iraq war 19war on terror 20foreign policy 21defense policy 23election reform 24faith and politics 26women's rights 27families 28space program 29agriculture 30service 31civil rights 32disabilities

6. Preliminary Results (2) April 4, 2008IGERT-IDM Seminar6

7. April 4, 2008IGERT-IDM Seminar 7 1abortion 4gun control 5economy 5.1spending 5.2taxes 5.3poverty 5.5social security 5.6the middle class 5.9research spending 6education 7energy policy 7.1energy independence 8environment 8.1global warming 9health care 10homeland security 11immigration 12judicial activism 13.1veterans 14political reform 16global image 18iraq war 19war on terror 20foreign policy 21defense policy 23election reform 24faith and politics 26women's rights 27families 28space program 29agriculture 30service 31civil rights 32disabilities