Gary Boyd Presentation on Cybernetics

CYBERNETICS, the Science of COMMUNICONTROL CAN YOU HAVE :COMMUNICATION WITHOUT CONTROL ?

CONTROL WITHOUT COMMUNICATION ?

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A SYSTEM consists of ENTITIES

and their RELATIONSHIPS to each other 

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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 

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A SYSTEM is composed of ENTITIES in RELATIONSHIPS

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MODULATION : – at the source-entity a mass or energy CARRIER is modulated by imposing a pattern on it.

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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

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Receiver Uncertainty Reduction Information (Shannon information) 

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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.

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The receiver’s internal state is changed by the received pattern. ď Ž

FIGURE

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NOISE is whatever extraneous pattern gets in with the DESIRED SIGNAL 

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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 ! ??

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