Search found 11 matches

by "Raymond T. Joseph"
Wed Nov 29, 2000 11:37 am
Forum: SD Mailing List Archive
Topic: SD and Architecture
Replies: 2
Views: 6673

SD and Architecture

If one chooses, they may use SD to define the requirements of an architectural design. The requirements may address specific building use, construction costs, costs of ownership. These may be looked at from an internal view - the building with respect to its owner/operator and from an external view ...
by "Raymond T. Joseph"
Wed Nov 29, 2000 10:06 am
Forum: SD Mailing List Archive
Topic: Sampling Theory - Energy Cycle
Replies: 1
Views: 5894

Sampling Theory - Energy Cycle

Sample rate has connections to the rate of change of information. The Nyquist sampling theorem says that you need to sample at twice the highest frequency component of the information you are analyzing. If you have data that has high frequency content but the desired information is represented by on...
by "Raymond T. Joseph"
Sun Jun 04, 2000 3:21 pm
Forum: SD Mailing List Archive
Topic: A different idea regarding simulation accuracy
Replies: 1
Views: 3133

A different idea regarding simulation accuracy

I love the voice of experience, thank you Bill not only for helping to maintain perspective but also for the life time examples. I especially like the last comment: "* It is easier today to create good transistor models cheaply than it was 20+ years ago." and its implications. Why is it ch...
by "Raymond T. Joseph"
Wed May 31, 2000 9:10 am
Forum: SD Mailing List Archive
Topic: Models for electoral politics
Replies: 1
Views: 2486

Models for electoral politics

"Scientific American" had an article on this about 15 - 20 years ago.

Ray
From: "Raymond T. Joseph" <rjoseph@wt.net>
by "Raymond T. Joseph"
Mon Feb 28, 2000 12:28 am
Forum: SD Mailing List Archive
Topic: Causal loop and Stock and Flow Diagramming
Replies: 8
Views: 7627

Causal loop and Stock and Flow Diagramming

Since I like electronic circuits, Ill take this path. Capacitors and inductors can be modeled with either differential or integral relationships. One chooses the relationship according to the intent. If the intent is to model the circuit, the differential relationship is usually chosen so the system...
by "Raymond T. Joseph"
Sat Jul 17, 1999 1:50 am
Forum: SD Mailing List Archive
Topic: Relationships versus measurement
Replies: 1
Views: 2600

Relationships versus measurement

Alex, There is no conflict here. Your management has invested in its existing process measurements and it sounds like they are interested in investing more. Physical measures provide the empirical data needed to correlate process relationships. You may need to perform relationship studies for statis...
by "Raymond T. Joseph"
Wed Apr 14, 1999 9:25 pm
Forum: SD Mailing List Archive
Topic: Panic Models
Replies: 8
Views: 9011

Panic Models

Bill,

Sorry for the fuzzy response:
Scientific American Magazine had a article desribing bifrucated surfaces and
used the fight-or-flight response of a dog. This was late 1970s to early
1980s.

Ray
From: "Raymond T. Joseph" <rjoseph@wt.net>
by "Raymond T. Joseph"
Tue Mar 16, 1999 9:07 pm
Forum: SD Mailing List Archive
Topic: Discrete Event Simulation v. System Dynamics
Replies: 13
Views: 10487

Discrete Event Simulation v. System Dynamics

Aitor, I have seen no single location for an extensive comparison. Most of my experiences with literature is from the IEEE Transactions on Automatic Control. DES optimization methods require exhaustive searches. For industrial problems, the solution set is too large for such methods. One usually end...
by "Raymond T. Joseph"
Sun Jul 19, 1998 11:05 pm
Forum: SD Mailing List Archive
Topic: telecommunications
Replies: 1
Views: 2992

telecommunications

Lees,

Try http://caciasl.com/comnet_whitepaper_menu.html

And then go to
http://www.rennes.enst-bretagne.fr/~inc ... Links.html, search
for the word comnet and youll see a group of alternatives.

Ray
From: "Raymond T. Joseph" <rjoseph@wt.net>
by "Raymond T. Joseph"
Sat Jun 20, 1998 1:32 am
Forum: SD Mailing List Archive
Topic: Software documentation as part of the system
Replies: 1
Views: 2474

Software documentation as part of the system

Pete, With SD you may describe different methods of document production. Some of todays programming toolsets include the methodology for documentation. In fact, products like Popkin Software and Rose provide for a variety of documentation methods. A somewhat large set of methods may be reviewed thro...
by "Raymond T. Joseph"
Tue Mar 17, 1998 8:56 pm
Forum: SD Mailing List Archive
Topic: Modeling in groups: who does that?
Replies: 6
Views: 4311

Modeling in groups: who does that?

I like starting off with the modelers to do a group overview - top down. Once a model is broken down into modules directly convertible to code, everyone takes their pieces and runs. Working in sufficiently close proximity allows for productive interaction and problem resolution. Ray -- Richard G. Du...