delicious blog » How SPEAR Identifies Domain Experts within Delicious

To tackle this problem, we created the SPEAR algorithm. SPEAR (Spamming-resistant Expertise Analysis and Ranking) is a new technique to measure the expertise of users by analyzing their public activities on platforms like Delicious. In the case of the latter, this means analyzing the timeline of the bookmarking and tagging activities of users. The focus of SPEAR is on the ability of users to find new, high quality information on the Internet. A great benefit of SPEAR is that it returns two very useful sets of results: first, a list of users ranked by their expertise; and second, a list of websites ranked by their quality. So, whether you are looking for experts on Delicious for the programming language JavaScript or want to find the best websites on photography, SPEAR can help.
(Link: delicious blog » How SPEAR Identifies Domain Experts within Delicious)