The study examines the regional peculiarities of immigration in Hungary. We reveal the reasons for immigration and the national differences thereof. We analyse the relations between the share of migrants and the road availability with the help of a road analysis method. The purpose of this study...

Mathematical model of a goal-oriented thinking with feedback is described. Basic notions: decision graph, feed-back hierarchy and self-duality are introduced and explained. A source of the conflict in our approach is the ignorance about the importance of decision maker's goals. In contrast to...