Erratum. After the publication of this paper, we found an inconsequential mistake in the derivation of the dissipation function for the Nosé-Hoover thermostatted system, Eq. (17) of the original paper. A complete and correct derivation for O(0)(X) is now reported in Appendix B of Ref. [1], where, in particular, it is shown that (Formula Presented) (Figure Presented)