Center for Computing Technologies (TZI), P.O.B. 330440, D-28334 Bremen, Germany.|Center for Computing Technologies (TZI), P.O.B. 330440, D-28334 Bremen, Germany.|Center for Computing Technologies (TZI), P.O.B. 330440, D-28334 Bremen, Germany.|Center for Computing Technologies (TZI), P.O.B. 330440, D-28334 Bremen, Germany.