Search found 18 matches

by zenabraham@aol.com
Wed Jun 18, 2003 4:34 pm
Forum: SD Mailing List Archive
Topic: Launch of Sports Business Simulations Inc.
Replies: 0
Views: 2576

Launch of Sports Business Simulations Inc.

June 18, 2003 Dear Friends, Today marks the official launch of Sports Business Simulations, Inc., or "SBS." SBS produces online business simulations of sports teams and leagues for use in the college classroom. The objective is to provide an extra tool to complement your instruction, thats...
by zenabraham@aol.com
Thu May 01, 2003 12:49 pm
Forum: SD Mailing List Archive
Topic: Can system dynamics models "learn"
Replies: 46
Views: 33408

Can system dynamics models "learn"

Greetings, To me, the concept of "learning" implies an awareness of change in knowledge. Thus, for a system dynamics model to "learn" means not only that it must be aware of what new information it has gained, but what information it does not possess. Then, it must be able to det...
by zenabraham@aol.com
Thu Apr 25, 2002 12:44 pm
Forum: SD Mailing List Archive
Topic: community health & evidence -a role for system dynamics?
Replies: 6
Views: 6328

community health & evidence -a role for system dynamics?

Hello, Im howling in protest! Just because one uses a regression analysis to develop a rationale for using a number does not mean the number is "robust." What do you mean by the term "robust?" I bristle at those within the forecasting community who think and believe that the stan...
by zenabraham@aol.com
Wed Apr 24, 2002 1:07 pm
Forum: SD Mailing List Archive
Topic: community health & evidence -a role for system dynamics?
Replies: 6
Views: 6328

community health & evidence -a role for system dynamics?

In a message dated 1/24/02 7:38:32 AM, jgunkler@sprintmail.com writes: << Mark Mackay asks if there is a role for SD in community health where little "evidence" is quantitative. I think there is. Hello All, I quite agree with the reply above. In System Dynamics, a basic rule is that one sh...
by zenabraham@aol.com
Tue Apr 23, 2002 3:03 pm
Forum: SD Mailing List Archive
Topic: XFL Microworld
Replies: 0
Views: 2956

XFL Microworld

Hello. I recently constructed a web-based simulation device called The XFL Microworld, in using system dynamics and in something called Forio Macro Language (FML). The purpose of the simulator is to introduce the world of web-based business and policy simulators to the sports business (and other ind...
by zenabraham@aol.com
Tue Apr 23, 2002 12:21 pm
Forum: SD Mailing List Archive
Topic: Bioethics simulations
Replies: 2
Views: 7065

Bioethics simulations

Hello,

Im not an expert in bioethics, but it occurs to me that a possible base for
a good simulator exists in the World III model. It was developed to show
relationships between world resource use and population growth.

Zennie
From: zenabraham@aol.com
by zenabraham@aol.com
Tue Apr 23, 2002 11:04 am
Forum: SD Mailing List Archive
Topic: Oakland Athletics Microworld v. 1.0b
Replies: 0
Views: 3187

Oakland Athletics Microworld v. 1.0b

Greetings, Announcing: The Oakland Athletics Microworld at http://broadcast.forio.com/sims/athletics Its an up-to-date system, complete with a representation of the recently passed rules that make up the MLB Collective Bargaining Agreement. Within this simulator, one can attempt to build a new stadi...
by zenabraham@aol.com
Fri Apr 19, 2002 8:36 am
Forum: SD Mailing List Archive
Topic: Economic Dynamics
Replies: 3
Views: 4032

Economic Dynamics

Hi May, What I have most enjoyed about SD may be summed up in this joke I was sent a while ago: An economist was drawing a model describing forecasts of growth in milk production. The person referred to rates of change, and population of consumers, etc. But the SD person in the back of the room rais...
by zenabraham@aol.com
Thu Apr 18, 2002 11:14 am
Forum: SD Mailing List Archive
Topic: SD Models from Written Text
Replies: 30
Views: 28200

SD Models from Written Text

Hello, I must register my disagreement with this point of view. While Im not a fan of the development of this technology, the more I think about it, the more my point of view is changing. The major problem in SD, to me, is that the practitioners state that building representations of a system by usi...
by zenabraham@aol.com
Mon Apr 15, 2002 11:21 am
Forum: SD Mailing List Archive
Topic: Limitations of System dynamics?
Replies: 10
Views: 20905

Limitations of System dynamics?

Greetings, My personal point of view, due to spark controversy, is that nothing is too complex to represent with System Dynamics. The only limitation is the knowledge and imagination of the researcher / programmer, and the software that person is using. Moreover, and perhaps for reasons known best t...
by zenabraham@aol.com
Sun Apr 14, 2002 10:27 am
Forum: SD Mailing List Archive
Topic: This List and The System Dynamics Society
Replies: 8
Views: 12944

This List and The System Dynamics Society

Hello, No. Its not a paranoia you are operating from, its a very sensitive observation and opens the door for some frank talk. On National Public Radio in the US, I heard this report: "A five-year old beat a financial expert and an astrologist in forecasting the British Stock market. The financ...
by zenabraham@aol.com
Fri Apr 12, 2002 11:55 am
Forum: SD Mailing List Archive
Topic: System Dynamcis work on terrrorism
Replies: 9
Views: 7227

System Dynamcis work on terrrorism

Hello,

I would suggest looking at the High Performance Systems web site, and their
area on "stories." Theyve produced a healthy body of work on the subject of
terrorism.

Zennie Abraham
From: zenabraham@aol.com
by zenabraham@aol.com
Thu Apr 11, 2002 1:50 pm
Forum: SD Mailing List Archive
Topic: System Dynamics Society Membership
Replies: 9
Views: 10673

System Dynamics Society Membership

Hello! Geoff Coyles e-mail came right on the "heels" of a discussion of the merits of establishing system dynamics as a "hard science," and my rather combative retort to his post, one deliberately designed to prod one to respond. So, since Im not a member of the System Dynamics S...
by zenabraham@aol.com
Sun Apr 07, 2002 2:33 pm
Forum: SD Mailing List Archive
Topic: Validation of SD-models?
Replies: 2
Views: 4033

Validation of SD-models?

Greetings, I dont know how youve designed your model, but I would suggest backcasting. This is where you "set" the model back to a "time" in the past, before the intended period that the models run is to cover. Then, you run it "forward" and evaluate its output results ...
by zenabraham@aol.com
Sun Apr 07, 2002 6:31 am
Forum: SD Mailing List Archive
Topic: Problem Macroeconomics
Replies: 2
Views: 3613

Problem Macroeconomics

Greetings, I must disagree with the posting. Im of the opinion that we should seek the development of one model capable of being adjusted to represent each country. Why? Well it goes back to this joke: An economist was writing equations on the board describing the growth of milk production and consu...
by zenabraham@aol.com
Thu Apr 04, 2002 10:42 am
Forum: SD Mailing List Archive
Topic: Beer Game simulation
Replies: 9
Views: 30621

Beer Game simulation

Hello, I suggest you use the "Near Beer Game," on the Forio Business Simulations website. Its at <A HREF="http://broadcast.forio.com/sims/nearbeer"> http://broadcast.forio.com/sims/nearbeer</A> To use the Forio description of the Near Beer game... "This is a draft version of...
by zenabraham@aol.com
Wed Apr 03, 2002 5:55 pm
Forum: SD Mailing List Archive
Topic: SD Models from Written Text
Replies: 30
Views: 28200

SD Models from Written Text

Hello, At first crack, I cant think of any reference that perfectly matches the desired answer to your question. But it occurs to me that if the answer were out there, then the perfect software construct based on it, would be a program that takes such text, and automatically crafts a system dynamics...
by zenabraham@aol.com
Tue Apr 02, 2002 11:43 am
Forum: SD Mailing List Archive
Topic: Game Theory and System Dynamics
Replies: 4
Views: 11695

Game Theory and System Dynamics

Hello, What examples are there of the matting of SD with common studies in Game Theory? For example, are there works featuring the graphing of equations using models developed in STELLA? ___________________________________________________________________ Zenophon Abraham From: zenabraham@aol.com