Representing constraints
Posted: Mon Apr 01, 2002 5:14 pm
Ive mentioned a couple of times what I see as a problem of representing
constraints in SD. I referred on those occasions to the issue of quantum
coupling between particles, which doesnt match the strictly causal
standpoint of SD. Unfortunately I could never on the spur of the moment
think of a more everyday example to express what I was trying to ask.
Now Ive just by accident come across one in my preparation for a
physics course, and Id like to ask my question once more (hopefully
more coherently this time!).
I want to explore with students the Gas Equation: PV = NkT, where P,V
and T are variables and N,k are constants. The nice thing about this
equation is that you can vary any two of the variables, which then
results in an unambiguous value for the third. So you can regard _any_
one variable as independent, another as dependent, and the third as a
parameter labelling the curves relating the other two.
My question: Can anyone think of a fancy way of representing this 3-way
dependency in some standard SD tool?
I feel pretty sure there is no way, but I just wanted to check.
Best wishes,
Niall Palfreyman.
From: Niall Palfreyman <niall.palfreyman@fh-weihenstephan.de>
constraints in SD. I referred on those occasions to the issue of quantum
coupling between particles, which doesnt match the strictly causal
standpoint of SD. Unfortunately I could never on the spur of the moment
think of a more everyday example to express what I was trying to ask.
Now Ive just by accident come across one in my preparation for a
physics course, and Id like to ask my question once more (hopefully
more coherently this time!).
I want to explore with students the Gas Equation: PV = NkT, where P,V
and T are variables and N,k are constants. The nice thing about this
equation is that you can vary any two of the variables, which then
results in an unambiguous value for the third. So you can regard _any_
one variable as independent, another as dependent, and the third as a
parameter labelling the curves relating the other two.
My question: Can anyone think of a fancy way of representing this 3-way
dependency in some standard SD tool?
I feel pretty sure there is no way, but I just wanted to check.
Best wishes,
Niall Palfreyman.
From: Niall Palfreyman <niall.palfreyman@fh-weihenstephan.de>