Hissingsid - 3:54 pm on Oct 14, 2011 (gmt 0)
Biswanath Panda is a very cleaver chap who works for Google. The Panda update was named after him.
His speciality is categorisation using decision trees.
If you couple decision tree categorisation with semantic analysis (the output of which is a vector model of a document) then you have a breakthrough in the storage space required and speed of retrieval of data stored.
It is the application of this as a component of the ranking algorithm that I believe is what Panda is all about.
Do a search on some of the vocabulary that has become very popular with the Google spokespeople, "False Positives" for example, and semantic vectors and you will see papers on "scalable detection of semantic clones" etc etc etc.
It seems to me that there can be no doubt that this is what Panda is about, the problem is, once you come to that conclusion what do you do about it.