English: The regulator aims to maintain the desired state(s) of some essential variable in the face of disturbances, by measuring the essential variable (blue arrow), comparing the value to a desired reference (red arrow) and using the difference as a basis for modifying the environment.
High-level diagram broadly based on material in W. Ross Ashby, "An introduction to cybernetics", Chapman & Hall, London, 1956.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.