model,8-3-J88-3002,ak with a characterization of what a <term> user model </term> is and how it can be used . The
model,6-4-J88-3002,ak of <term> information </term> that a <term> user model </term> may be required to keep about a <term>
model,6-6-J88-3002,ak Since acquiring the knowledge for a <term> user model </term> is a fundamental problem in <term>
hide detail