Search found 117 matches

by John Sterman
Wed Dec 29, 1999 10:01 pm
Forum: SD Mailing List Archive
Topic: Job Opening at Darden
Replies: 0
Views: 9177

Job Opening at Darden

****** Folks, Im forwarding this job opening at the Darden School, at the U. of Va. Darden has been teaching system dynamics for some time (note the inclusion of dynamic systems among the list of teaching areas). John Sterman From: John Sterman <jsterman@MIT.EDU> From: "Bodily, Sam" <Bodil...
by John Sterman
Thu Dec 23, 1999 10:15 am
Forum: SD Mailing List Archive
Topic: Resource allocation models
Replies: 28
Views: 40429

Resource allocation models

The discussion on formulations for the allocation of resources to multiple customers has been interesting; thanks to all for useful contributions. The focus of the discussion has often been finding a parsimonious formulation (defined as one you can explain successfully to your client) that meets var...
by John Sterman
Tue Nov 30, 1999 9:33 am
Forum: SD Mailing List Archive
Topic: ICCS:International Conference on Complex Systems CFP
Replies: 1
Views: 16195

ICCS:International Conference on Complex Systems CFP

Folks, FYI - this conference may be of interest. John Sterman jsterman@MIT.EDU >List-Unsubscribe: <mailto:complex-announcements-off@necsi.org> >Reply-To: <complex-announcements@necsi.org> (Announcements of Complex >Systems Related Activities) >Sender: <complex-announcements@necsi.org> (Announcements...
by John Sterman
Thu Nov 11, 1999 5:46 pm
Forum: SD Mailing List Archive
Topic: Workshop "Economic Dynamics from the Physics Point of View"
Replies: 0
Views: 10333

Workshop "Economic Dynamics from the Physics Point of View"

Forwarded by John Sterman <jsterman@MIT.EDU> >Subject: Workshop "Economic Dynamics from the Physics Point of View" > > Please distribute this announcement to interested collegues. > We apologize for multiple postings! >______________________________________________________________________ ...
by John Sterman
Thu Nov 11, 1999 2:06 pm
Forum: SD Mailing List Archive
Topic: Viridian Climate Modelling
Replies: 0
Views: 9510

Viridian Climate Modelling

Folks, The following message, forwarded by Alan AtKisson to the Balaton Group (founded by Dana and Dennis Meadows, a group of folks committed to creating a sustainable world), describes a terrific idea for distributed modeling. The same concept is being used to factor large numbers for codebreaking,...
by John Sterman
Mon Sep 20, 1999 10:43 am
Forum: SD Mailing List Archive
Topic: Post Doctoral Fellowship at Stanford
Replies: 0
Views: 9477

Post Doctoral Fellowship at Stanford

Forwarded by John Sterman: >POSTDOCTORAL FELLOWSHIP IN COMPUTER SIMULATION MODELING > AND MEDICAL DECISION ANALYSIS > > Stanford University School of Medicine > Stanford, California > >Join a multidisciplinary research team investigating the burden of breast >cancer in the United States and the prom...
by John Sterman
Mon Jun 28, 1999 8:49 am
Forum: SD Mailing List Archive
Topic: Call for Papers: Before and After Studies of Y2K
Replies: 0
Views: 2184

Call for Papers: Before and After Studies of Y2K

>Date: Fri, 25 Jun 1999 11:40:03 -0400 (EDT) >From: "Stuart A. Umpleby" <umpleby@gwis2.circ.gwu.edu> >To: John Sterman <jsterman@MIT.EDU> >Subject: Call for Papers: Before and After Studies of Y2K (fwd) >Mime-Version: 1.0 > >Prof. Sterman, Would you please forward this to the system dynami...
by John Sterman
Wed May 26, 1999 6:28 am
Forum: SD Mailing List Archive
Topic: Announcing a new software for supply chain dynamics ...
Replies: 0
Views: 2273

Announcing a new software for supply chain dynamics ...

Folks, The following message from Ravi Anupindi at Kellogg (Northwestern) describes a new web-based Beer Game and their experience with it in the MBA core operations management class there. Its a promising alternative to the board game for those with access to the internet. John Sterman From: John S...
by John Sterman
Fri Mar 19, 1999 10:08 am
Forum: SD Mailing List Archive
Topic: Discrete Event Simulation v. System Dynamics
Replies: 13
Views: 10487

Discrete Event Simulation v. System Dynamics

Bill Harris is right - the essence of system dynamics is the feedback perspective. The assumption of continuous flows is a modeling approximation, useful for many but far from all problems and model purposes. It is perfectly possible and often done to incorporate feedback processes in discrete simul...
by John Sterman
Mon Jan 04, 1999 10:39 pm
Forum: SD Mailing List Archive
Topic: Jay W. Forrester Award: Call for Nominations
Replies: 0
Views: 2365

Jay W. Forrester Award: Call for Nominations

******* CALL FOR NOMINATIONS ******* The System Dynamics Society solicits nominations for the 1999 Jay Wright =46orrester Award. The Jay Wright Forrester Award is presented as often as once annually for the best contribution to the field of system dynamics published in the preceding five years. The ...
by John Sterman
Mon Dec 14, 1998 9:55 am
Forum: SD Mailing List Archive
Topic: SD-modeling tools vs. Spreadsheets
Replies: 5
Views: 15888

SD-modeling tools vs. Spreadsheets

I fully endorse Georges comments on the difficulties of spreadsheets for dynamic modeling. But there are other pragmatic reasons not to do this as well. While it is possible to represent a system dynamics model in excel, I strongly advise against it. Properly capturing feedbacks and stock-flow struc...
by John Sterman
Thu Oct 22, 1998 9:55 am
Forum: SD Mailing List Archive
Topic: Article of interest
Replies: 4
Views: 9879

Article of interest

I highly recommend that people read the article by Erling Moxnes entitled "Not Only the Tragedy of the Commons: Misperceptions of Bioeconomics" which appeared in Management Science, 44(9), Sept. 98 (1234-1248). Erling conducted a lab experiment with a simulated fishery in which the decisio...
by John Sterman
Fri Jul 24, 1998 9:23 am
Forum: SD Mailing List Archive
Topic: Climate Change and SD
Replies: 1
Views: 3123

Climate Change and SD

George Backus is right about the need for multiple models of the climate change problem (and any other problem for which the uncertainty and stakes are high). The implications go beyond what George suggests. In addition to recognizing that no one model is sufficient, the various models must be made ...
by John Sterman
Sun Jul 05, 1998 10:24 am
Forum: SD Mailing List Archive
Topic: Energy 2020
Replies: 11
Views: 30084

Energy 2020

In SD 1526 Roberto Vacca analyzes trends in global CO2 concentrations by fitting a logistic curve to the Keeling et al. Mauna Loa CO2 data. As is often the case with data showing exponential-like growth, the equation fits reasonably well. Roberto finds a good fit with an asymptote of 400 ppm CO2. He...
by John Sterman
Mon May 11, 1998 11:57 am
Forum: SD Mailing List Archive
Topic: Reinvestment Models
Replies: 1
Views: 2533

Reinvestment Models

Jack Homer developed a model directly applicable to this issue. The model significantely extended Forresters Urban Dynamics model to include gentrification and reinvestment in mature neighborhoods, insurance redlining, and even arson for profit. The model was calibrated and tested against data for t...
by John Sterman
Mon Oct 27, 1997 8:29 am
Forum: SD Mailing List Archive
Topic: System Dynamics in the elevator
Replies: 22
Views: 16370

System Dynamics in the elevator

Bravo to Mike McCann. Even though Im not a marketing person, I agree with his view on the low value of a canned "elevator speech". The key, in all social settings, not only instrumental ones where you hope to sell someone something, is to listen to the other person, get to know them, and u...
by John Sterman
Sun Oct 19, 1997 6:06 pm
Forum: SD Mailing List Archive
Topic: perennial crop modelling
Replies: 7
Views: 4633

perennial crop modelling

Besides Dennis Meadows classic "dynamics of commodity production cycles", see Helmut Weymars "Dynamics of the World Cocoa Market" (19668, MIT Press). Weymar did his phd thesis in economics but worked with the MIT SD group; his model is basically a system dynamics model of the sup...