Models
Passive
A model can be
purely passive
Narrowly Active
A model can be active in
one small facet, with the
modeller providing the
missing context - a
wind-tunnel model, for
example
Facet vs Autonomous
As the system being modelled becomes more complex,
the modeller can no longer maintain the context around
multiple facet models because there are too many
interactions, so the model needs to become
autonomous
Broadly Active
A model can be active
and autonomous - the
model aeroplane carries
its own context - the
connections between all
the pieces
Active and Internal
We want to build internal models of the
world that are active and autonomous that is, they carry their own context and
require nothing outside of themselves that
“understands” them
A Program as a Model
Programmer
Environment
Sensory
Layer
Business
Knowledge
Motor
Layer
The cognitive structure - the programmer - is used as
scaffolding for the model, removed for operation
Autonomous Model
A PLUS operator in a network may not seem like
much, but it is an autonomous model, deciding
within itself how to respond to change of state on its
connections and which connection will be the output
Internal Model
The world is dynamic
For an internal model to successfully
mirror the world, it has to be able to
change its connections - to also be
dynamic
Monkey See
We build an internal model of the world, so we can
predict future behavior - we make the model out of
structure so we can combine it with other structure
Cognitive Model
Environment
Sensory
Layer
A pilot provides the cognitive
layer in a plane, active and
capable of rearranging internal
cognitive structure to suit
changing circumstances
Motor
Layer
Increasing Complexity
Mechanised
Cognitive Layer
Sensory
Layer
Motor
Layer
As systems operate faster and become more
complex, it becomes appropriate to wrap a
mechanised cognitive layer around the human
Internal Model
The elements combine to form an active,
uncommitted structure capable of selfmodification
See Predictive Models