20. A computer memory comprising program instructions for performing the steps of: linking a first node that is a semantic Janus unit of a computer-implemented network structure to a second node of the computer-implemented network structure using a first link, wherein the first node, the second node and the first link are parts of a semantic network machine, wherein the first node possesses a state that varies with time, and wherein data is stored in the second node; generating changed data by carrying out computational operations on the data based on the state of the first node; storing the changed data in the second node; adding a third node to the semantic network machine; changing the first link to link the first node to the third node, wherein the changed data and the changing the first link to link the first node to the third node are used to recognize a pattern; and generating an image that includes the recognized pattern.
20. A computer memory comprising program instructions for performing the steps of: linking a first node that is a semantic Janus unit of a computer-implemented network structure to a second node of the computer-implemented network structure using a first link, wherein the first node, the second node and the first link are parts of a semantic network machine, wherein the first node possesses a state that varies with time, and wherein data is stored in the second node; generating changed data by carrying out computational operations on the data based on the state of the first node; storing the changed data in the second node; adding a third node to the semantic network machine; changing the first link to link the first node to the third node, wherein the changed data and the changing the first link to link the first node to the third node are used to recognize a pattern; and generating an image that includes the recognized pattern. 21. The computer memory of claim 20 , wherein the recognized pattern is taken from the group consisting of: a road, a river, a railroad track, an electricity line, a blood vessel, a ligament, and an urban area.