Ventana software support forum

Gene,

Here is the message I got from the developer of EGO when it first came out.

Just as a note, Ive found it reasonably easy to use, and I like the fact
that it manages causal loop diagrams, unlike iThink (but like PowerSim?).
The primary difference Ive found is the lack of emphasis on exogenous
variables; i.e., there are no "clouds" as in iThink. You can read his
documentation and see his reasoning. The one or two models Ive created in
EGO werent a problem (*), but it took me a while to convert my thinking
from the iThink paradigm.

Bill

(*) Well, there was _one_ problem. His documentation doesnt show how to
access a function. He since told me the secret. For example, if you wish
to create a step of amplitude 3 after time 12, you invoke the function as
"3 step: 12". Logarithms are done as "argument log: base".

>
>
>Hello, Im Dong-Hwan Kim .
>Recently, I developed a software for system dynamics modelling and
>simulation; named as EGO (Equations as Graphic Objects).
>It runs on MS-windows.
>I want to share it with system dynamists who want a free or public
>s/w for teaching system dynamics/system thinking.
>Anyone can get it from following ftp site.
> ftp.kornet.nm.kr
> (168.126.63.7)
> log: anonymous
>You can find EGO.ZIP in pub/incoming directory.
>
>You can install it into your computer with following steps.
>1. make a directory for EGO (eg: c:ego)
>2. copy EGO.ZIP file to the directory
>3. pkunzip ego.zip
>4. run ms-window
>5. run v.exe in the previous directory.
>
>
>===========================================================
>Dong-Hwan Kim
>
><Office>
>137-070
>ETRI, 6th-floor Leaders office Bldg 1599-11,
> Seocho-Dong, Seocho-Ku, Seoul, Korea
><Home>
>135-240
>Jugong Apt, 17-207,
>Kaepo-Dong, Kangnam-Ku, Seoul, Korea
>
><Tel>
>82-2-3471-6339 (O), 82-2-573-2192 (H)
><FAX>
>82-2-588-7337
>
>superi1@soback.kornet.nm.kr
>dhkim@techno.etri.re.kr
>===========================================================
>


--
Bill Harris Hewlett-Packard Co.
R&D Productivity Department Lake Stevens Division
domain: billh@lsid.hp.com M/S 330
phone: (206) 335-2200 8600 Soper Hill Road
fax: (206) 335-2828 Everett, WA 98205-1298