slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Agenda PowerPoint Presentation
Download Presentation
Agenda

Loading in 2 Seconds...

play fullscreen
1 / 10

Agenda - PowerPoint PPT Presentation


  • 114 Views
  • Uploaded on

Invitation to Research SYSTEMS THINKING Roger Clarke , Xamax Consultancy, Canberra Visiting Professor, CSIS, Uni of Hong Kong Visiting Fellow, Australian National University http://www.anu.edu.au/people/Roger.Clarke/... ...Res /15-Sys.ppt ebs, 16-20 January 2003. Agenda. Systems Models

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Agenda' - indra


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Invitation to ResearchSYSTEMS THINKINGRoger Clarke, Xamax Consultancy, CanberraVisiting Professor, CSIS, Uni of Hong Kong Visiting Fellow, Australian National University http://www.anu.edu.au/people/Roger.Clarke/......Res /15-Sys.pptebs, 16-20 January 2003

agenda
Agenda
  • Systems
  • Models
  • Cybernetics
  • Complexity of:
    • System
    • Model
    • Behaviour
a system
A System
  • A set of interacting Real-World Entities
  • Interacts with its Environment across its Boundary
  • Entities within a System:
    • gather inputs via Sensors
    • transmit outputs via Effectors
    • interact with one another via Interfaces
  • Systems may:
    • exist at the same level (e.g. an mammal’s cardio-vascular and digestive systems)
    • be related hierarchically (e.g. corpuscles within blood within the cardio-vascular system)
system characteristics
System Characteristics
  • Degree of Closedness/Opennessto external Stimuli or Triggers
  • EntropyThe tendency to lose energy and order
  • NegentropyThe importation of energy to sustain order
  • Unguidedness cf. Purposiveness
  • Adaptiveness/LearningThe ability to change as a result of stimuli
a model
A Model
  • An Abstract-World Representationof a Real-World System
  • Iconic or Symbolic/Mathematical
  • Capable of being:
    • viewed (e.g. a map
    • manipulated (e.g. a model aircraft in a wind-tunnel)

in ways that the System cannot be

  • Necessarily (greatly) simplified
  • ‘The only reliable model of a real-world system is the system itself’ (Pratchett)
categories of models
Categories of Models
  • Deterministic Models – Automata
    • Computable by Analytical Methods
    • Too Complex to Compute, hence Requiring Numerical Methods
  • Probabilistic Models
  • Non-Deterministic / Stochastic Models
    • Entities exercisingSelf-Determination / Free Wille.g. Humans and Organisations
cybernetics
Cybernetics
  • Control Loop:
    • Inputs or Process Parameters changedas a result of measurement of Outputs
  • Feedback:Positive / Reinforcing or Negative / Retardent
  • Static Equilibrium / Steady-State cf.Dynamic Equilibrium / Homeostasis
  • Delays, Control Limits, Tolerances

=> Hunting / Hysteresis, Over-Correction

  • Feedforward
  • Tiered Control Loops exhibit Complex Behaviour
levels of discourse about systems boulding
Levels of Discourse About Systems (Boulding)
  • Framework Anatomy
  • Balanced Dynamic Clockwork
  • 1st-Order Control Thermostat
  • Open, Self-Maintaining Cell (in Biology)
  • Genetic-Societal Plant
  • Self-Aware, Purposive Animal (& Orgn?)
  • Self-Conscious Human
  • ...