Research at the Communications Engineering group focuses on acoustic pattern recog­nition, speech and language technology, and technical cognitive systems. One of our core issues is developing a new mathematical model, inspired by quantum field theory, of the perception-action cycle, the behavior controller and of certain higher cognitive capabilities like, for instance, attention, coping, and fantasy. Further, we work on a unified mathematical and algorithmic representation of all processing levels of cognitive systems, e.g. by generalized finite automata like subsymbol-symbol transducers and Petri net transducers.