Ventana software support forum

Posted by Martin Schaffernicht <martin@utalca.cl> Hi Richard, I'd be interested in knowing more about your research. I do not know about methods to assess similarity, but there are some papers about the assessment of /differences/ (in some way this may be the other side of the coin): * Langfield-Smi...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, the contributions of Marc and Alan rise two questions in me: 1. how to compare ""cognitive maps"" and ""casual loop diagrams""? 2. why is the use of ""influence diagrams"" not more wides...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, to those of you who speak/read spanish, let me announce you that the Latinamerican Chapter's newsletter ""sisTEMAS"" is now on-line at http://dinamicasistemas.utalca.cl/sisTEMAS/sisTEMAS_Cartagena/sisTEMAS_4.htm As always, all...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi again, additionally to the ""velcro"" theory, we also use what we already know to understand what we encounter. Somewhere I read ""if all you have is a hammer, everythink starts looking like nails"". So woul...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi Marc, thanks for the ""shot""! Let us take the simulation model used by Erling Moxnes (it can be freely downloaded from his wab page) as a ""pure physical system"": after downloading it and opening PowerSim,...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, I have a question concerning the èrceptio (misperception) of feedback. In ""Misperceptions of basic dynamics: the case of renewable resource management"" (SDR 20(2): 139-162), Erling Moxnes describes an experiment that uses a ...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, I've always read and heard that ""how structure creates behavior"" is what SD is about. Or, a little more general: ""how things change over time"". In the first definition, ""structure""...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, I have a question regarding the early steps of the modeling process. We urge SD students to model a problem, not ""the system""; the (mental model of the) problem thus acts as key for abstracting relevant items from the real s...

Posted by Martin Schaffernicht <martin@utalca.cl> Jean-Jaques, I believe there are two different groups SD talks to. One is made up of people who are interested in SD itself, in becoming ""dynamicists""; in the other group there are those who have aproblem and want to know what b...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi everybody, for those of you who read spanish, the Latinamerican Chapter has a newsletter. Currently the ""number 3"" is on-line at http://dinamicasistemas.utalca.cl/sisTEMAS/sisTEMAS_3/sisTEMAS_3.htm I invite you to have a look...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, yesterday I played the ""beer game"" with a small group of students (three groups of 2 each), and they produced much less oscillatino than what I'd seen before (usually the groups I have are larger). By day 25 they had underst...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi Nooshin, I would like to ask you what will be your definition of ""system thinking"". Two examples, taken from Sweeny and Sterman (2000) and Ossimits (2002) show how different this can be: Sweeny and Sterman: 1. understand how ...

Posted by Martin Schaffernicht <martin@utalca.cl> Hi, it is usually accepted that modeling triggers learning, this is to say: the modeler's mental model changes as effect of the activity ""modeling"". It wonder if this has been measured. I found studies that looked for mental mod...