Clarity, clarity is what is needed in this paper. I agree with Dave -- terms like "energy", "agent", and "semantic topology" only serve to confuse the reader. Overall, this paper has too many variables, metrics, and parameters.

One equation I couldn't figure out was "match(k, Q)", on the third page. Q is the list of user-supplied keywords, k is a keyword in the document, but where does k come from?

I particularly liked section 3.2, because the agent has the ability to determine relevant keywords from documents as it crawls. I wonder how this is controlled, however, and how well it is able to stay on the correct, original topic.