Comparison Mrinmaya et. al. WWW2012 and McCallum et al 2004

Papers

The papers are

• Mrinmaya et. al. WWW'12
• The Author-Recipient-Topic Model for Topic and Role Discovery in Social Networks: Experiments with Enron and Academic Email

Comparison

In essence, the two papers are similar in the sense that McCallum's role in the RART model can be thought of as Mrinmaya's definition of community in the TURCM model. Other than the fact that Mrinmaya incorporates the type of interaction (i.e. for twitter: normal tweet, retweet, mention, reply, etc...), the basic ideas behind the RART model and the TURCM are similar.

However, one slight difference between the TURCM model and the RART model is in how the community and the recipient is generated:

• In the TURCM model, for each user $u$'s post $P$, a community $c$ is chosen, and based on $c$, the recipient $r$ is chosen. (Thus, the community is assigned with respect to a particular post, not to a particular user. But you can marginalize over all posts of a user to get the community distribution for a user)
• However, in the RART model, both the author and recipient's community assignment is based on the users themselves.

Questions

1. How much time did you spend reading the (new, non-wikified) paper you summarized? About 1 hour
2. How much time did you spend reading the old wikified paper? About 2 hours
3. How much time did you spend reading the summary of the old paper? About 5 min
4. How much time did you spend reading background material? About 30 min
5. Was there a study plan for the old paper? Yes
   1. if so, did you read any of the items suggested by the study plan? and how much time did you spend with reading them? The first 2 were papers I have read in the past. I did a quick read (mainly on introduction) on Airoldis' Mixed Membership Stochastic Blockmodel paper, which took me about 30 minutes.
6. Give us any additional feedback you might have about this assignment. '