Hans-Jörg Kreowski is a professor for computer science at the University of Bremen in North West Germany. His primary research area is theoretical computer science with an emphasis on graph transformation, algebraic specification, and syntactic picture processing. He is also a member of the Forum of Computer Scientists for Peace and Social Responsibility [de] (FIfF). Source: https://en.wikipedia.org/wiki/Hans-J%C3%B6rg_Kreowski