  It is proved that almost every interval exchange transformation given by the
symmetric permutation 1->m, 2->m-1,..., m-1->2, m->1, where m>1 is an odd
number, is disjoint from ELF systems. The notion of ELF systems was introduced
to express the fact that a given system is of probabilistic origin; the
following standard classes of systems of probabilistic origin enjoy the ELF
property: mixing systems, ergodic Gaussian systems, Poisson suspensions,
dynamical systems coming from stationary infinitely divisible processes. Some
disjointness properties of special flows built over interval exchange
transformations and under piecewise constant roof function are investigated as
well.
