On Fri, 19 Sep 2003 13:58:36 -0000, "David Robbins"
wrote:
"Cecil Moore" wrote in message
...
Exactly what magic happens at the instant when a
system goes from the transient state to steady-state?

there is no magic, and real systems can never get to steady state. the
steady state approximations are used by engineers who understand their
limitations and know when they can apply them to easily get answers that are
good enough for every day use.

Hi David,

This is the difference between Engineering and religion. All
Engineering works with error and simply states the limits of
confidence to known factors. That is 1 Ohm/Volt/Ampere to a tolerance
of 20% or 10% or 5% or better. When differences between known
boundary conditions far exceed the error of their determination, then
you can rest assured that you have a solution that is an accurate
portrayal of those different boundary conditions. (On reflection,
even religion acknowledges error; so comparisons are an affront to
that study as well. What goes on in these "debates" is simple,
narcissistic laziness.)

I offered a simple line loss problem some time ago to which there was
only one correct submission (be e-mail no less). This problem
approached this "debate" with known errors and the correspondent found
a solution to within 0.06 dB while others, frozen in mental gridlock,
failed to even choose the conventional "perfect" answer. In the work
place they would be staring at the bench, transfixed in the agony of
Zeno's paradox, while real techs (not even engineers) would have the
problem whipped before the first break (and still had done productive
work too).

73's
Richard Clark, KB7QHC