On the Stability of Global Weights in the Presence of Spam

In A Comparison of Document, Sentence, and Term Event Spaces, Blake analyses the stability of various global weight models (IDF, … More

Answers to IR Quiz

Answers to the IR Quiz are given below: Term Independence Assumption: If k1 and k2 are statistically independent they should … More

By now subscribers should have the current issue of IR Watch – The Newsletter in their inbox. Non subscribers: A … More

“IDF is simply neither a pure heuristic, nor the theoretical mystery many have made it out to be. We have … More

I was looking for the oldest evidence of marketing firms formally selling links and came across this one from 1995 … More

After Yahoo’s CEO Jerry Yang blew it with Microsoft and before the most likely August’s proxy fight between the Icahn-Yang … More

Here is a question I included during the final examination of the Search Engines Architecture course. I am modifying the … More

Now that the semester is over we can take on other projects. After a little break from the blog, it is … More

I’m happy to learn that Dr. Deepak Khemani from the Artificial Intelligence & Database Research Group at Indian Institute of … More