We review here the results of one of the experiments performed at the 2003 Reliable Information Access (RIA) Workshop, hosted by Mitre Corporation and the Northeast Regional Research Center (NRRC). The experiment concentrates on query expansion using relevance feedback and explores the behaviour of several information retrieval systems using variable numbers of relevant documents.
Online social networks are often a by-product of blogging and other online media sites on the Internet. Services such as LiveJournal allow their users to specify who their "friends" are, and thus a social network is formed. This paper will explore the relationship between users with the intent of being able to make a prediction of a users age and country of residence based on the information given by their friends on this social network.
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