The invention relates to a method of communication adapted to the transmission of data packets that can be transmitted according to various physical modes. Each processing element stores and outputs final data as a function of its position in the row. The transitions are consistently shaped even though the distance between the recording head and the surface of the medium may change. During the surface modification, the dopant in the dopant fluid layer is actively replenished. The desired whether concrete is included in abstract computation system is enhanced by a system of categorizing natural objects using as primitives a set of self tendencies suitable, when hierarchically assigned to objects, to do incremental simulation of future situations from a presented situation.