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Agent-based Social Simulation tools: Brahms andNetLogoCitation for published version (APA):
Sie, R. (2010). Agent-based Social Simulation tools: Brahms and NetLogo.
Document status and date:Published: 15/10/2010
Document Version:Peer reviewed version
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September 21st, 2010
Agent-based social simulation tools: Brahms and NetLogoRory Sie, LN plenary
di 21 sep 10 (wk )
Structure
✤ Agent-based social simulation tools... what?
✤ Brahms
✤ NetLogo
✤ Brahms vs. NetLogo (yeah!)
di 21 sep 10 (wk )
What are agent-based social simulation tools?
✤ Agent-based computing
✤ Computer simulation
✤ Social science
✤ Tools
agent-based computing
computer simulation
social science
stolen from Davidsson (2002)
di 21 sep 10 (wk )
Brahms in a nutshell
✤ Developed by NASA
✤ Primarily used for work practice modelling
✤ Agent-oriented simulation
✤ Allows for cognitive modelling (Belief-Desire-Intention model)
di 21 sep 10 (wk )
Brahms in a nutshell
✤ Developed by NASA
✤ Primarily used for work practice modelling
✤ Agent-oriented simulation
✤ Allows for cognitive modelling (Belief-Desire-Intention model)
social science
di 21 sep 10 (wk )
Brahms in a nutshell
✤ Developed by NASA
✤ Primarily used for work practice modelling
✤ Agent-oriented simulation
✤ Allows for cognitive modelling (Belief-Desire-Intention model)
social science
agent-based simulation
di 21 sep 10 (wk )
Basic use
✤ Facts
✤ Beliefs about facts
✤ Activities
✤ Workframes
✤ Thoughtframes
di 21 sep 10 (wk )
Basic use
✤ Facts
✤ Beliefs about facts
✤ Activities
✤ Workframes
✤ Thoughtframes
this is a presentation
di 21 sep 10 (wk )
Basic use
✤ Facts
✤ Beliefs about facts
✤ Activities
✤ Workframes
✤ Thoughtframes
this is a presentation
I think this is a presentation
di 21 sep 10 (wk )
Basic use
✤ Facts
✤ Beliefs about facts
✤ Activities
✤ Workframes
✤ Thoughtframes
this is a presentation
I think this is a presentation
give a presentation
di 21 sep 10 (wk )
Basic use
✤ Facts
✤ Beliefs about facts
✤ Activities
✤ Workframes
✤ Thoughtframes
this is a presentation
I think this is a presentation
give a presentation
if LN plenary then give a presentation
di 21 sep 10 (wk )
Basic use
✤ Facts
✤ Beliefs about facts
✤ Activities
✤ Workframes
✤ Thoughtframes
this is a presentation
I think this is a presentation
give a presentation
if LN plenary then give a presentation
if LN plenary is now, I think LN plenary is now
di 21 sep 10 (wk )
Programming example (1/2)
✤ activities:
primitive_activity GivePresentation(){ display: "Giving a presentation"; min_duration:1; // one second max_duration:1800; // 1800 seconds, or half an hour }
di 21 sep 10 (wk )
Programming example (2/2)
✤ workframe wf_GivePresentation{
repeat:false;variables:forone(boolean) LN_plenaryIsNow;// beliefwhen(knownval(current.LN_PlenaryIsNow = true))//if LN plenary is nowdo{ // then GivePresentation(); // give the presentation conclude((current.givingPresentation = true),bc:100,fc:100); // new belief/fact }}
di 21 sep 10 (wk )
Programming example (2/2)
✤ workframe wf_GivePresentation{
repeat:false;variables:forone(boolean) LN_plenaryIsNow;// beliefwhen(knownval(current.LN_PlenaryIsNow = true))//if LN plenary is nowdo{ // then GivePresentation(); // give the presentation conclude((current.givingPresentation = true),bc:100,fc:100); // new belief/fact }}
that’s me!
di 21 sep 10 (wk )
Programming example (2/2)
✤ workframe wf_GivePresentation{
repeat:false;variables:forone(boolean) LN_plenaryIsNow;// beliefwhen(knownval(current.LN_PlenaryIsNow = true))//if LN plenary is nowdo{ // then GivePresentation(); // give the presentation conclude((current.givingPresentation = true),bc:100,fc:100); // new belief/fact }}
beliefthat’s me!
di 21 sep 10 (wk )
Programming example (2/2)
✤ workframe wf_GivePresentation{
repeat:false;variables:forone(boolean) LN_plenaryIsNow;// beliefwhen(knownval(current.LN_PlenaryIsNow = true))//if LN plenary is nowdo{ // then GivePresentation(); // give the presentation conclude((current.givingPresentation = true),bc:100,fc:100); // new belief/fact }}
belief factthat’s me!
di 21 sep 10 (wk )
Brahms strong points
✤ Agent reasoning
✤ Very realistic and powerful
✤ Communication protocol
✤ Agents/objects can carry (conceptual) objects
✤ Locations
di 21 sep 10 (wk )
Brahms weak points
✤ Relatively small group of users (NASA, TU Delft)
✤ Difficult to model iterations
✤ Little support for transient / fuzzy relationships
✤ Difficult to model randomness
di 21 sep 10 (wk )
NetLogo in a nutshell
✤ Developed by Uri Wilensky in 1999
✤ swarm-based simulation
✤ micro-level programming --> study macro-level behaviour
✤ new version released!
di 21 sep 10 (wk )
NetLogo strong points
✤ Lots of users
✤ Iterations, randomness
✤ support for media
✤ Easy to use
di 21 sep 10 (wk )
Brahms vs. NetLogo
Brahms NetLogotype agent-oriented swarm-based
primary goal work-practice modelling
social simulationno. users - ++support - +usability +/- ++
agent reasoning ++ -math operations - +include media - +
di 21 sep 10 (wk )
What suits you best?
✤ My point of view
✤ Interested? [email protected]
Brahms NetLogo
di 21 sep 10 (wk )
What suits you best?
✤ My point of view
✤ Interested? [email protected]
Brahms NetLogo
scale
di 21 sep 10 (wk )