CYBERNETICS, the Science of COMMUNICONTROL CAN YOU HAVE :COMMUNICATION WITHOUT CONTROL ? CONTROL WITHOUT COMMUNICATION ?
A SYSTEM consists of ENTITIES
and their RELATIONSHIPS to each other
In a CYBERSYSTEM the most important kind of connecting relationships are: CONTROL relationships. IF entities are close-coupled the control doesn’t need a communication channel. Otherwise CONTROL is mediated through COMMUNICATION CHANNELS
A SYSTEM is composed of ENTITIES in RELATIONSHIPS
MODULATION : â€“ at the source-entity a mass or energy CARRIER is modulated by imposing a pattern on it.
The COMMUNICONTROL CHANNEL ď Ž
The carrier carries the pattern through a time and space CHANNEL from the source entity (SENDER) to a RECEIVER entity
Receiver Uncertainty Reduction Information (Shannon information)
If and only if the RECEIVER is a learner or learning machine which has a set of expected possibilities with regard to the SOURCE, Then the pattern received REDUCES THE RECEIVER’s UNCERTAINTY about what is the situation at the source (sender). NOTE THAT: RUR-INFORMATION is a relationship property between the message – pattern and the particular receiver, NOT a property of the message in itself. 4
The receiverâ€™s internal state is changed by the received pattern. ď Ž
NOISE is whatever extraneous pattern gets in with the DESIRED SIGNAL
Noise INCREASES the receiver’s uncertainty. Note that WHAT is NOISE and what is desired signal is decided by only the RECEIVER. SIGNAL / NOISE RATIO = 30dB ! ?? 8