（转帖自本人2007年11月20日的一篇博文）
自上周中国驻美国大使周文重来学校演讲之后，今天学校又迎来了89年六四事件的主角之一 -- 王丹。
王丹69年生人，六四之后，在监狱里关押了4年，释放后由于继续从事相关活动，再次被捕，判刑11年，后因国际舆论压力，被释放直接流放到美国，现在Harvard历史系攻读博士学位，马上即将毕业。
我坐在第二排，看的听的都比较清楚。王丹给我的感觉是，首先觉得他还是挺真诚的，并不是一味的唱高调，鼓吹六四有什么重大意义之类的，相反的，他承认当时的绝食似乎有欠妥当，而且学生所做的也不都是正确的。其次，觉得王丹特别的镇定，不管对他的人身攻击也好，对各种各样的提问也罢，总是能安静的把问题听完，然后从容不迫、条理清楚的作出回答，而且声音很平静。
Our research group at the University of Michigan has been working on the "related modules" block for Drupal.org for more than 2 years now. We have published 2 papers on this project so far:
1) Assessment of Conversation Co-mentions as a Resource for Software Module Recommendation. Will be presented at ACM Recommender System Conference'09
2) Conversation Pivots and Double Pivots. Presented at ACM Computer Human Interaction Conference'08
Thanks to the support of Google Summer of Code'09, I was able to develop the Recommender Bundle for Drupal, which includes the following modules:
http://drupal.org/project/recommender
http://drupal.org/project/history_rec
http://drupal.org/project/fivestar_rec
http://drupal.org/project/voting_rec
http://drupal.org/project/uc_rec
http://drupal.org/project/similargroups
http://drupal.org/project/media_rec (not developed)
This paper is submitted to ACM Recommender System Conference'09, co-authored with my advisor Prof. Paul Resnick.
ABSTRACT
My Google Summer of Code 2009 proposal was accepted. The basic idea is to develop at least three modules based on Recommender API. For example, one module is to recommend Flash videos based on users' viewing history like in YouTube. A mockup screenshot is like this:
For more details and discussion, please go to http://groups.drupal.org/node/19894.
There's a big demand from the Drupal community to add fivestar-like ratings to the contrib modules. This would be a pretty cool feature, but it has other concerns too.
A brief history to begin with ...
The idea is to generate "related modules" recommendation based on co-citations. Suppose we have TinyMCE and FCKeditor co-mentioned together in many forum discussions, then we consider the 2 modules related to some extend. Here is a detailed explanation.
From the experience of developing the "pivots" Drupal module recommendation system, I developed the general purpose Recommender API module. It was released today.
Previously, 'related modules' were generated based on discussions in d.o. forum -- if several modules were mentioned in the same discussion threads, we consider them to be somewhat related. (More detailed explanation of the algorithms can be found in my previous Planet Drupal blogs).
