The other day I described a framework (service-oriented agent-based modeling) that I thought would suit the kinds of M&S I want to do. As far as I know there isn't any literature on this sort of modeling paradigm. But if a re-interpretation of stocks and flows modeling can be understood in that light and if work has already been done in that area, I want to know about it so that I don't reproduce that effort.
-- Russ On Fri, Aug 28, 2009 at 7:42 AM, Douglas Roberts <[email protected]>wrote: > Why are you asking this? Do you want to build an ABM of a system that > models stock transactions, or write a paper about how do do so, of just find > a place for this class of simulation that fits your worldview? > > --Doug > > > On Fri, Aug 28, 2009 at 8:26 AM, Russ Abbott <[email protected]>wrote: > >> My question was simpler than that. Is there work on stocks and flows >> models in which the network structure is not static? >> >> -- Russ >> >> >> >> On Fri, Aug 28, 2009 at 6:59 AM, Nicholas Thompson < >> [email protected]> wrote: >> >>> All, >>> >>> I have tried to stay out of this discussion because I know even less >>> about this subject than usual, if such a thing is possible. But ..... >>> >>> Russ Abbott wrote: >>> >>> *In a service-oriented agent-based model the agents have the ability to >>> reconfigure themselves dynamically and perhaps even to add new agents and >>> new stock nodes. In a stocks and flows model, the structure of the network >>> static.* >>> >>> Which led me to wonder if there is any thing lurking in the notion of >>> "self-reconfiguration" here that might be making the programing more >>> difficult. What would be lost (or gained) if we replaced the words "ability >>> to reconfigure themselves" with the words "sometimes are reconfigured". >>> That's the thing about metaphysics: cant live with it; cant live without >>> it. At the risk of saying something both controversial and >>> incomprehensible, isnt the notion of self-organization literally a non >>> starter because, in control theory, the control parameter, the measure by >>> which the system takes stock of its own organization, is always some part or >>> feature of the system, not the whole system. It's a cue. >>> >>> all be best, >>> >>> Nick >>> >>> Nicholas S. Thompson >>> Emeritus Professor of Psychology and Ethology, >>> Clark University ([email protected]) >>> http://home.earthlink.net/~nickthompson/naturaldesigns/<http://home.earthlink.net/%7Enickthompson/naturaldesigns/> >>> >>> >>> >>> >>> >>> ----- Original Message ----- >>> *From:* Russ Abbott <[email protected]> >>> *To: *The Friday Morning Applied Complexity Coffee Group<[email protected]> >>> *Cc: *Antony W. Iorio <[email protected]>; [email protected]; >>> [email protected]; >>> Lowe,Donald<[email protected]> >>> *Sent:* 8/28/2009 5:49:40 AM >>> *Subject:* Re: [FRIAM] Agents, stocks, and flows >>> >>> In a discussion with a colleague today we talked briefly about stocks and >>> flows networks. It struck me that a stocks and flows model is a limited sort >>> of service-oriented agent-based model. In a service-oriented agent-based >>> model, agents accept inputs and produce outputs -- the simplest version >>> being a supply chain. That's really a stocks and flows model in which the >>> agents control the flows. Important differences are: >>> >>> - In an agent-based model, the agents are assumed to be autonomous in >>> various ways. In a stocks and flows model the flow rates are not >>> autonomous. >>> The flow rates are equations that don't have the ability to change >>> themselves.They are assumed to be facts about the nature of the domain >>> being >>> modeled. >>> >>> >>> - In a service-oriented agent-based model the agents have the ability >>> to reconfigure themselves dynamically and perhaps even to add new agents >>> and >>> new stock nodes. In a stocks and flows model, the structure of the >>> network >>> static. >>> >>> So this raises the question whether anyone knows of any work in stocks >>> and flows modeling that addresses stocks and flows networks that are >>> flexible in the ways just mentioned. >>> >>> -- Russ >>> >>> >>> ============================================================ >>> FRIAM Applied Complexity Group listserv >>> Meets Fridays 9a-11:30 at cafe at St. John's College >>> lectures, archives, unsubscribe, maps at http://www.friam.org >>> >> >> >> ============================================================ >> FRIAM Applied Complexity Group listserv >> Meets Fridays 9a-11:30 at cafe at St. John's College >> lectures, archives, unsubscribe, maps at http://www.friam.org >> > > > > >
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
