Sampling in rare events under non-equilibrium conditions

In a recent work, reported by Berryman-Schilling proposes a novel method for calculating the time-series of the probability of a rare event in non-equilibrium conditions [link]. The main contribution of this work lies in the modification of  Pruned-enriched Rosenbluth method, where they call this new algorithm S-PRES. This work might be an interesting  advancement while it does not assume a prior knowledge on the transition paths itself.