Search found 9 matches

by Andy Ford
Thu Jul 08, 2004 3:59 pm
Forum: SD Mailing List Archive
Topic: System dynamics and emission trading
Replies: 1
Views: 3303

System dynamics and emission trading

Pawel & the SD List: Klaus Vogstad has applied system dynamics to the nordic market for TGCs, Tradeable Green Certificates. These are used to promote renewable electricity generation and thus reduce the emission of greenhouse gasses. His results are reported in the Proceedings of the 2003 SD Con...
by Andy Ford
Fri Apr 07, 2000 10:55 am
Forum: SD Mailing List Archive
Topic: Looking for a Reference about SMART
Replies: 1
Views: 2735

Looking for a Reference about SMART

This is Andy Ford responding to Jurgen Hemmes question about merging System Dynamics with "SMART." SMART stands for "Simple Multi-Attribute Rating Technique." Its a way of "keeping score" on the simulation results based on the goals specified by each user and each users...
by Andy Ford
Mon Jan 17, 2000 10:24 am
Forum: SD Mailing List Archive
Topic: REEPLY looking for crime / police applications
Replies: 0
Views: 2033

REEPLY looking for crime / police applications

This is Andy Ford responding to Ivo Sarges inquiry about SD applications to crime and police. There are two students reports which deal with this topic: 1. March 1995 student report on the "Multnomah County Sheriffs Office" by students in Bob Johannsens class at Portland State University. ...
by Andy Ford
Mon Dec 20, 1999 10:08 am
Forum: SD Mailing List Archive
Topic: Resource allocation models
Replies: 28
Views: 40856

Resource allocation models

George Backus makes a good point when he encourages us to think of the market share equation MSi = EXP(Ui)/sum(EXP(Uj)) in a system dynamics model of the allocation of a limited resource. The MSi stands for the market share of alternative i. The EXP is the exponential function. And the U stands for ...
by Andy Ford
Sat Dec 11, 1999 10:35 am
Forum: SD Mailing List Archive
Topic: Models of Desertification
Replies: 2
Views: 2615

Models of Desertification

Enrique, Tony Picardi developed an interesting system dynamics model of desertification in the Sahel. The model simulated overgrazing, soil degradation and other issues of interest to the US AID, the US Agency for International Development. A short sketch of Tonys model appears in Chapter 9 of Model...
by Andy Ford
Wed Jul 21, 1999 9:56 am
Forum: SD Mailing List Archive
Topic: Models of Beaver Populations
Replies: 0
Views: 2128

Models of Beaver Populations

Someone asked the SD Discussion List for an example of system dynamics = applied to beavers. Brian Sturtevant, of the Univ. of Maryland Center = for Environmental Studies, has published a Stella model of beaver = impoundments. His focus is the succession of a beaver pond, with = emphasis on vegetati...
by Andy Ford
Tue Jul 13, 1999 5:53 pm
Forum: SD Mailing List Archive
Topic: SD & GIS
Replies: 1
Views: 2785

SD & GIS

This is Andy Ford responding to Daniel Castillo Brievas inquiry about = combining system dynamics with a Geographical Information System, a GIS. = Its gratifying to see so many responses to this inquiry, especially = for those of us working in the environmental area. Hallie Anthony, one of our MS st...
by Andy Ford
Tue Jul 13, 1999 2:02 pm
Forum: SD Mailing List Archive
Topic: Looking for Simple Water/Atmosphere models
Replies: 1
Views: 2630

Looking for Simple Water/Atmosphere models

This is Andy Ford replying to Dean Bredwells inquiry about simple = models of the hydrologic cycle. Arthur Few from Rice University had = done some work on Global Climate & Education for NCAR, the National = Center for Atmospheric Research in Boulder, CO. Their "global change = instructiona...
by Andy Ford
Thu Jun 17, 1999 1:39 pm
Forum: SD Mailing List Archive
Topic: Forest Growth Modeling
Replies: 1
Views: 2802

Forest Growth Modeling

Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable This is Andy Ford replying with two suggestions regarding the inquiry = from William Hajime Yonenaga about system dynamics applied to forest = growth: =20 First, a lot of work has been done by Steve Bo...