Search found 18 matches

by carolus
Fri Apr 25, 2003 5:05 pm
Forum: SD Mailing List Archive
Topic: Simulation Model Interchange Language
Replies: 13
Views: 16353

Simulation Model Interchange Language

SDs, The construction of SD models is done in a number of ways including different software packages on different platforms. This diversity has a number of advantages but at the same time it is restricting the ability to exchange views and comments on certain models, since models are not (yet) vendo...
by carolus
Thu Apr 24, 2003 4:23 pm
Forum: SD Mailing List Archive
Topic: Modeling for general consumption
Replies: 2
Views: 3087

Modeling for general consumption

Rays reply on Rutgers Q on Music Industry modelling is interesting. It refers to - at least - three questions. Q1: can we model the Illegal Music Industry (Rutgers initial Q.)? Q2: if so, should any interested party have access to this modelling process? Q3: and more in general: should any decision ...
by carolus
Tue Apr 22, 2003 1:40 am
Forum: SD Mailing List Archive
Topic: SD and the propensity to file long term disability
Replies: 2
Views: 4332

SD and the propensity to file long term disability

John J. Voyers query is most intriguing. To start with, I must confess that Im not an expert on disabilities or injury claims. Nevertheless, I would like to add some thoughts on this issue. The query seems to have two parts. The first is about the problematic behavior: >(...) a query on (...) any in...
by carolus
Fri Apr 26, 2002 6:09 pm
Forum: SD Mailing List Archive
Topic: Differential equations
Replies: 25
Views: 39559

Differential equations

SDrs, Ed Gallaher posed a very interesting question: * Can anyone provide examples that contradict Jays assertion? in which Jays assertion is: >>> Mathematicians have had some difficulty defining a derivative, and >>> there is a reason. There is no such thing. Nowhere in nature or >>> human affairs ...
by carolus
Sat Apr 20, 2002 10:28 am
Forum: SD Mailing List Archive
Topic: SD Models from Written Text
Replies: 30
Views: 28202

SD Models from Written Text

Hi All, This thread on extracting models from written documents generates a certain Aha-erlebnis, as the germans would probably say. The ratio behind the initial request seems to be the availability of a tool that does the hard work: extracting knowledge from certain sources. If that would be possib...
by carolus
Wed Apr 17, 2002 3:12 pm
Forum: SD Mailing List Archive
Topic: the meaning of widget
Replies: 0
Views: 2778

the meaning of widget

Dear SDrs, According to the timelines of the 20th century, <http://timelines.ws/20thcent/1961.HTML> the word widget comes from the Musical How to Succeed in Business Without Really Trying, by Frank Loesser and Abe Burrows who produced the Broadway hit. The play lampooned life at the fictional Worldw...
by carolus
Thu Apr 11, 2002 9:50 am
Forum: SD Mailing List Archive
Topic: System Dynamics Society Membership
Replies: 9
Views: 10674

System Dynamics Society Membership

Dear colleagues, geoff coyle wrote with regard to the content of this discussion list: >Id be the last to turn away an enquirer, but is it unreasonable > to suggest that someone who wants to use the Societys facilities This struck me as rather strange. I thought there has been put forward, also on t...
by carolus
Sat Apr 15, 2000 11:16 am
Forum: SD Mailing List Archive
Topic: Level of Detail in Models
Replies: 2
Views: 2635

Level of Detail in Models

The discussion on Level of Detail in Models now seems to me like a loop. Maybe someone can falsify it. I observe the following: * we dont understand why X occurs so we have a problem * that problem can be solved if we know why it occurs so we need (more) insight * in order ot increase our insight we...
by carolus
Tue Apr 04, 2000 8:52 pm
Forum: SD Mailing List Archive
Topic: expanding prison populations
Replies: 1
Views: 2519

expanding prison populations

John, Regarding prison populations you may find some interesting findings in the research of Paul E. McCold (1993): "The role of fiscal policy in producing prison population dynamics: a trend analysis and dynamic simulation of felony offender processing in New York State 1975-1988. Dissertation...
by carolus
Fri Apr 23, 1999 2:50 pm
Forum: SD Mailing List Archive
Topic: Modeling the Kosovo Crisis
Replies: 4
Views: 4200

Modeling the Kosovo Crisis

I was wondering whether someone has (made) a model of the escalating KOSOVO crisis? -- Carolus Gr=FCtters +++++++++++++++++++++++++++++++++++++++++++++++++++++ Recht en Informatica Law and IT Faculteit der Rechtsgeleerdheid Faculty of Law KU Nijmegen, University of Nijmegen URL: http://www.jur.kun.n...
by carolus
Fri Apr 17, 1998 10:34 am
Forum: SD Mailing List Archive
Topic: Modeling in groups: who does that?
Replies: 6
Views: 4313

Modeling in groups: who does that?

Richard, (regarding group modeling) try: 1. Group model building : facilitating team learning using system dynamics / Jac A.M. Vennix. - Chichester [etc.] : Wiley, cop. 1996. - XIII, 297 p. : ill. ; 24 cm Lit. opg.: p. [278]-292. - Index. ISBN 0-471-95355-5 cloth and: 2. the special issue of the Sys...
by carolus
Tue Apr 22, 1997 1:41 pm
Forum: SD Mailing List Archive
Topic: System Dynamics in the elevator
Replies: 22
Views: 16370

System Dynamics in the elevator

Im not that often in an elevator, neither do I have trouble in explaining what System Dynamics is all about. The problem I do have has to do with the actual choice, within 30 seconds, out of the numerous - different - definitions and interpretations or meanings of System Dynamics given, for example,...
by carolus
Thu Apr 03, 1997 2:17 pm
Forum: SD Mailing List Archive
Topic: SD model about the development of crime in germany...
Replies: 2
Views: 2251

SD model about the development of crime in germany...

Answering a question on "the development of crime" models, Nordin Othman suggested the following: >Daryl A. Hellmans book "The Economics of Crime" is a good base towards >conceptualization. I tried to locate this book in DUTCH libraries, but didnt succeed. The only thing I found ...
by carolus
Fri Apr 26, 1996 3:50 pm
Forum: SD Mailing List Archive
Topic: List Management
Replies: 1
Views: 1822

List Management

from carolus grutters (carolus@jur.kun.nl) Bob urged us : > Please send messages only to system-dynamics@world.std.com. Bob, is this reply on your SD0065 (via europe.std.com AND NOT world.std.com) acceptable ? [ My answer is yes and I apologize for my confounding of the confusion. It is OK to post t...
by carolus
Sat Apr 20, 1996 11:16 am
Forum: SD Mailing List Archive
Topic: Current software in system dynamics
Replies: 9
Views: 5921

Current software in system dynamics

L.S., A couple of weeks ago Tim Edwards asked the following >I am currently considering which software package would best suit my needs. >I have looked at the demo versions of PowerSim, STELLA/iThink and Vensim for >PC and am left somewhat in a state of confusion ! Subsequently, some people responde...
by carolus
Wed Apr 10, 1996 1:40 pm
Forum: SD Mailing List Archive
Topic: discussion on the list: items
Replies: 0
Views: 1412

discussion on the list: items

Some remarks have been made about the threads on this list. RJ Glitz suggested: * feedback from conference sessions I would like to add: * feedback on articles published in the System Dynamics Review Carolus +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Carolus Grutters Recht en Informat...
by carolus
Thu Apr 27, 1995 6:02 pm
Forum: SD Mailing List Archive
Topic: modelling of legal procedures
Replies: 2
Views: 2312

modelling of legal procedures

I mentioned in a previous note my work on the modeling of legal procedures. George Richardson asked in response: >What are the dynamics of interest in this area? Ill try to formulate a short answer to this question. 1. Using a system-dynamic approach of a certain process implies getting insight into...
by carolus
Thu Apr 20, 1995 11:58 am
Forum: SD Mailing List Archive
Topic: Getting up on the Web
Replies: 3
Views: 3037

Getting up on the Web

Dear Subscribers, With reference to Bob Eberleins call for participation I would like to ask something. Im working on my thesis concerning the use of SD in the domain of Law (and IT), and particularly the modelling of legal procedures. As far as I know, little has been done in this area. Does anyone...