agent-based social simulation tools: brahms and netlogo

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Open Universiteit www.ou.nl Agent-based Social Simulation tools: Brahms and NetLogo Citation 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 Document license: CC BY-SA Please check the document version of this publication: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license above, please follow below link for the End User Agreement: https://www.ou.nl/taverne-agreement Take down policy If you believe that this document breaches copyright please contact us at: [email protected] providing details and we will investigate your claim. Downloaded from https://research.ou.nl/ on date: 03 Jul. 2020

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Open Universiteit www.ou.nl

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

Document license:CC BY-SA

Please check the document version of this publication:

• A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences betweenthe submitted version and the official published version of record. People interested in the research are advised to contact the author for thefinal version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers.

Link to publication

General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.

• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain• You may freely distribute the URL identifying the publication in the public portal.

If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license above, pleasefollow below link for the End User Agreement:

https://www.ou.nl/taverne-agreement

Take down policyIf you believe that this document breaches copyright please contact us at:

[email protected]

providing details and we will investigate your claim.

Downloaded from https://research.ou.nl/ on date: 03 Jul. 2020

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 agent viewer

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 )

Runtime Example

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 )