File prefetching is an eeective technique for improving le access performance. In this paper, we present a le prefetching mechanism that is based on on-line analytic modeling of interesting system events and is transparent to higher levels. The mechanism, incorporated into a client's le cache manager, seeks to build semantic structures, called access trees, that capture the correlations between...

We report on our preliminary studies of a new controller for a two-link brachiating robot. Motivated by the pendulum-like motion of an ape's brachiation, we encode this task as the output of a \target dynamical system." Numerical simulations indicate that the resulting controller solves a number of brachiation problems that we term the \ladder", \swing up" and \rope" problems. Preliminary analy...