Re: Tip for GPS users


"Eric Gisse" <jowr.pi@xxxxxxxxx> wrote in message
news:1161656507.655398.260850@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Tom Potter wrote:
"Eric Gisse" <jowr.pi@xxxxxxxxx> wrote in message
news:1161592747.645827.178900@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

tdp1...@xxxxxxxxx wrote:
[...]

As a guy who sold several kinds of accelerometers
back in the 1960's, and attended seminars on the subject,

So?

That makes you a salesman, not a physicist.

Thank you!

Nothing happens until somebody sells something.

That may be so, but my point is that just because you sold stuff and
attended a few talks about the stuff you sold, does not mean that you
actually have a complete understanding of the stuff.

However, you being a salesman does explain your curious dislike of
general relativity. Since there are a lot less down-to-earth
applications for GR as opposed to SR/QM/Newton, you percieve GR as
being useless.

Rejecting a certain theory just because it isn't directly influencing
your life right this second is incredibly short-sighted. Just because
you don't see a direct down to earth use for GR right this second does
not mean there will not be one down the road.

"Eric Gisse" makes a good point.
I do not "actually have a complete understanding of "
General Relativity and Astrology.

I do know that
the ultimate measure of the relationship between cause and effect
is the auto-correlation between the assumed causes and the assumed effects.

Models and theories are mnemonics
used to expand and extrapolate ONE cross-correlation
(Tests of Einstein's general theory of relativity
did not provide an experimental foundation for the theory
until well after it was introduced in 1915.
Physicists accepted the theory
because it correctly accounted for
the precession of the perihelion of Mercury..)
or a set of correlations.

All models are limited in their applications.
For example, have you ever seen GTR used to model
DNA, ionization potentials, electronegativity, to build a bridge,
to design an electrical or electronic system, a semiconductor,
or an information compressor (JPG, ZIP, etc.), etc.?

And as GTR is "continuous"
whereas reality consists of "discrete" events,
it cannot be the end all,
nor a look into the "mind of God".

Physics works on a small subset of the properties
perceived by humans. This sub-set is called the physical properties,
and Maxwell found about 140 years ago,
that four of these physical properties could be used as pointers
to all of the other physical properties.

This is now called Dimensional Analysis,
and ALL models and theories MUST
be dimensional correct, or else they are not physics.

Value should be placed on utility and correlations,
rather than models and theories,
or on credentials and individuals.

The value of a model, theory, person, group, nation, etc.
to mankind can best be quantized in terms of
"discounted rate of return" on the resources invested in them,
and in terms of this measure,
General Relativity is an enormous loser,

as it has waste enormous amounts of
time, money and minds,
on such pursuits as hero worship, space warps,
gravitons, race/religion promotion, time travel, gravitons,
rubber clocks and rulers, etc.

A dollar is a terrible thing to waste.

--
Tom Potter
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