Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Some people can visualize the apple, some can't. Some of the can't
folks are writers, artists, healthcare providers, programmers. Their
brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

One guy I talked to today can only imaging the apple floating above
his head, and can't manipulate, or really much see, it. He's a very
good programmer.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they
can't visualize spatial situations or mentally model trajectories.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

"john larkin" <jl@glen--canyon.com> wrote in message news:8gp8nj9oj4doomp7fkc7akclnkn8e18mj1@4ax.com...

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Haven't we been through this before?

Some people can visualize the apple, some can't.

Or so they say.
There's no way to know what goes on in someone else's head.

Some of the can't
folks are writers, artists, healthcare providers, programmers. Their
brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

One guy I talked to today can only imaging the apple floating above
his head, and can't manipulate, or really much see, it. He's a very
good programmer.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they
can't visualize spatial situations or mentally model trajectories.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 17:19:51 -0500, "Edward Rawde"
<invalid@invalid.invalid> wrote:

"john larkin" <jl@glen--canyon.com> wrote in message news:8gp8nj9oj4doomp7fkc7akclnkn8e18mj1@4ax.com...

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Haven't we been through this before?

Some people can visualize the apple, some can't.

Or so they say.
There's no way to know what goes on in someone else's head.

There are tests for visualization skill. The US Marine Corps wants
people with good vizualization and dynamics, so they have one test
that shows flat pieces of cardboard with printed patterns, and a bunch
of boxes, one of which can be folded up from the cardboard. Fun. I
aced that one but didn't want to be a Marine.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 14:00:00 -0800, john larkin <jl@glen--canyon.com>
wrote:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Some people can visualize the apple, some can't. Some of the can't
folks are writers, artists, healthcare providers, programmers. Their
brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

This was discussed on SED in September 2024 in the thread titled
"Visualizing".

One guy I talked to today can only imaging the apple floating above
his head, and can't manipulate, or really much see, it. He's a very
good programmer.

Programming per se is logic, not physics.

There has been lots of research on performing mental rotation of a
figure or object, based on how long it takes to answer a question that
requires mental rotation. Turns out that the delay is proportional to
the magnitude (in degrees) of the required rotation, and not the
direction, as I recall. It does not much depend on IQ.

This implies that there is a physical area in the brain that performs
rotation, and how well this works will thus vary from person to
person.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they
can't visualize spatial situations or mentally model trajectories.

Well, maybe they're just arrogant and entitled. Manners don't arise
from or require the mental ability to visualize a rotating apple.

Joe Gwinn

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 17:19:51 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message news:8gp8nj9oj4doomp7fkc7akclnkn8e18mj1@4ax.com...

Close your eyes and imagine an apple in front of your face. Can you see
it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the stem
points?

Haven't we been through this before?

ISTR we have.

Some people can visualize the apple, some can't.

I just find it bizarre that some people can't. I have no difficulty seeing
it in great detail 3D technicolour and the perspective manipulation is no problem, either.
There again, I was equally astonished when I discovered that not everyone dreams in colour as that was also something I'd always taken for granted.
BTW, being able to visualise 3D objects in space has not assisted me in
the least with laying out a board in advance and the are invariably no
shortage of items I fail to allow space/clearance/connectivity-convenience
for. And my visio-spatial awareness *in practice* is equally hopeless. So
there must be something more to it.

Or so they say.
There's no way to know what goes on in someone else's head.

Some of the can't folks are writers, artists, healthcare providers,
programmers. Their brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

One guy I talked to today can only imaging the apple floating above his
head, and can't manipulate, or really much see, it. He's a very good
programmer.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they can't
visualize spatial situations or mentally model trajectories.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

"john larkin" <jl@glen--canyon.com> wrote in message news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real. https://www.youtube.com/watch?v=T647CGsuOVU

But we can build the circuit, and it might work.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Apples are real.

But we can build the circuit, and it might work.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 18:07:34 -0500, Joe Gwinn <joegwinn@comcast.net>
wrote:

On Tue, 31 Dec 2024 14:00:00 -0800, john larkin <jl@glen--canyon.com>
wrote:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it >>moving? Can you look down on it from the top and see which way the
stem points?

Some people can visualize the apple, some can't. Some of the can't
folks are writers, artists, healthcare providers, programmers. Their
brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

This was discussed on SED in September 2024 in the thread titled >"Visualizing".

One guy I talked to today can only imaging the apple floating above
his head, and can't manipulate, or really much see, it. He's a very
good programmer.

Programming per se is logic, not physics.

There has been lots of research on performing mental rotation of a
figure or object, based on how long it takes to answer a question that >requires mental rotation. Turns out that the delay is proportional to
the magnitude (in degrees) of the required rotation, and not the
direction, as I recall. It does not much depend on IQ.

This implies that there is a physical area in the brain that performs >rotation, and how well this works will thus vary from person to
person.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they
can't visualize spatial situations or mentally model trajectories.

Well, maybe they're just arrogant and entitled. Manners don't arise
from or require the mental ability to visualize a rotating apple.

Joe Gwinn

I said that I suspected half.

My wife is neither arrogant nor entitled. But she wouldn't be a good
line chef; she can't navigate or anticipate other peoples' paths, in a
kitchen or on the road. She's a superb speech pathologist.

Motion is yet another dimension of visualization.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real. https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance or
the plotting of a Smith Chart without recourse to them.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 1/01/2025 10:48 am, john larkin wrote:

On Tue, 31 Dec 2024 18:07:34 -0500, Joe Gwinn <joegwinn@comcast.net>
wrote:

On Tue, 31 Dec 2024 14:00:00 -0800, john larkin <jl@glen--canyon.com>
wrote:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Some people can visualize the apple, some can't. Some of the can't
folks are writers, artists, healthcare providers, programmers. Their
brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

This was discussed on SED in September 2024 in the thread titled
"Visualizing".

One guy I talked to today can only imaging the apple floating above
his head, and can't manipulate, or really much see, it. He's a very
good programmer.

Programming per se is logic, not physics.

There has been lots of research on performing mental rotation of a
figure or object, based on how long it takes to answer a question that
requires mental rotation. Turns out that the delay is proportional to
the magnitude (in degrees) of the required rotation, and not the
direction, as I recall. It does not much depend on IQ.

This implies that there is a physical area in the brain that performs
rotation, and how well this works will thus vary from person to
person.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they
can't visualize spatial situations or mentally model trajectories.

Well, maybe they're just arrogant and entitled. Manners don't arise
from or require the mental ability to visualize a rotating apple.

I said that I suspected half.

My wife is neither arrogant nor entitled. But she wouldn't be a good
line chef; she can't navigate or anticipate other peoples' paths, in a kitchen or on the road. She's a superb speech pathologist.

Motion is yet another dimension of visualization.

Visualisaton is just one way of thinking about a problem. John Larkin
thinks that he can do it well, and consequently thinks that it is a
uniquely valuable skill.

He doesn't seem to have a clue about all the other ways of getting your
head around a problem, and can't recognise any of them when other people
try to talk about them.

--
Bill Sloman, Sydney

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

"Cursitor Doom" <cd999666@notformail.com> wrote in message news:vl24d4$2e828$2@dont-email.me...

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message
news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it >>>>> moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real.
https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance or
the plotting of a Smith Chart without recourse to them.

But do they exist?
https://www.youtube.com/watch?v=ALc8CBYOfkw

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On a sunny day (Tue, 31 Dec 2024 17:30:55 -0500) it happened DJ Delorie <dj@delorie.com> wrote in <xno70r1o4g.fsf@delorie.com>:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Poor guys that bought one :-)
Steven Jobs would have objected

There was an interesting program on BeepBeepSee (BBC for those with limited decoding)
where they had some Nobel prize winners around the table being interviewed
was among other things about genetics.. man stated we are not so different from worms...
https://www.nobelprize.org/nobel-minds/

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On a sunny day (Tue, 31 Dec 2024 14:00:00 -0800) it happened john larkin <jl@glen--canyon.com> wrote in <8gp8nj9oj4doomp7fkc7akclnkn8e18mj1@4ax.com>:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Some people can visualize the apple, some can't. Some of the can't
folks are writers, artists, healthcare providers, programmers. Their
brains apparently process words, not images.

Seems to me that a circuit designer should be able to visualize
circuits, but maybe not.

One guy I talked to today can only imaging the apple floating above
his head, and can't manipulate, or really much see, it. He's a very
good programmer.

I suspect that half of the people that we think are rude in
supermarkets, or bad drivers, aren't so much ill-mannered as they
can't visualize spatial situations or mentally model trajectories.

No problem here imagining the apple, or Biden, or a SpaceX launch happening above my head..
Programming works too, as does imagining PCB layouts.
Programmed a music controlled light show that ran last night and a laser projection of fireworks
on the window screen you can also see from outside.
Added 150 W output fireworks sound at exactly 00 hours of Dec 31.

Was fun, did not have much sleep,
maybe 2 hours, been typing replies to email..

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On a sunny day (Tue, 31 Dec 2024 17:19:51 -0500) it happened "Edward Rawde" <invalid@invalid.invalid> wrote in <vl1qm9$t4k$1@nnrp.usenet.blueworldhosting.com>:

"john larkin" <jl@glen--canyon.com> wrote in message news:8gp8nj9oj4doomp7fkc7akclnkn8e18mj1@4ax.com...

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

Haven't we been through this before?

Some people can visualize the apple, some can't.

Or so they say.
There's no way to know what goes on in someone else's head.

Mind reading is easy., I did it with some politicians
Doing it all the time.

But I do a lot of meditation
If YOUR mind is still you can see the slightest thing in somebody else's face.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Cursitor Doom <cd999666@notformail.com> wrote:

[...]

I just find it bizarre that some people can't. I have no difficulty seeing
it in great detail 3D technicolour and the perspective manipulation is no problem, either.
There again, I was equally astonished when I discovered that not everyone dreams in colour as that was also something I'd always taken for granted.

I was amazed to realise that I dream left-right reversed.

I had one particularly vivid dream in which the layout of the house
where it took place was evidently important. I woke and sketched a plan
of the house on a scrap of paper. The next morning I tried to work out
where the dream took place, but didn't know of anywhere that fitted the
plan. Then I tried viewing it in mirror-image and it became immediately apparent where it was.

Since then, whenever I remember a dream, I check to see if it was
mirror-image and there is almost always a clue somewhere that it was.

I think the fact that I am left-handed may be part of the explanation.
I am sure it explains why I found it so easy to work on mirror-image
printed circuit board layout drawings and then found it difficult to
come back to working right-way-around.


--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Jan Panteltje <alien@comet.invalid> wrote:

[...]

Programmed a music controlled light show that ran last night and a laser
projection of fireworks > on the window screen you can also see from
outside.
Added 150 W output fireworks sound at exactly 00 hours of Dec 31. ...

Are you sure you weren't just imagining it?


--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Wed, 1 Jan 2025 01:05:40 -0000 (UTC), Cursitor Doom <cd999666@notformail.com> wrote:

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message
news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it >>>>> moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real.
https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance or
the plotting of a Smith Chart without recourse to them.

Certainly complex impedances can be visualized and analyzed in time
domain. Better than in classic slide-rule-days RF terms.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Wed, 01 Jan 2025 07:45:20 -0800, john larkin wrote:

On Wed, 1 Jan 2025 01:05:40 -0000 (UTC), Cursitor Doom <cd999666@notformail.com> wrote:

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message
news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com>
wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you >>>>>> see it? In detail, in color? Can you rotate it on any axis and see >>>>>> it moving? Can you look down on it from the top and see which way
the stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real.
https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance
or the plotting of a Smith Chart without recourse to them.

Certainly complex impedances can be visualized and analyzed in time
domain. Better than in classic slide-rule-days RF terms.

There certainly is a highly useful role for TD in this area. In fact by
using a TDR and a VNA together one can disintangle multiple reflections on
a network and uncover discontinuities that are obscured by other
reflections. I really should get a TDR; it's about the only piece of test
kit (apart from a curve tracer) I don't own. Must remedy those
shortcomings as a priority!

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Wed, 1 Jan 2025 17:11:02 -0000 (UTC), Cursitor Doom <cd999666@notformail.com> wrote:

On Wed, 01 Jan 2025 07:45:20 -0800, john larkin wrote:

On Wed, 1 Jan 2025 01:05:40 -0000 (UTC), Cursitor Doom
<cd999666@notformail.com> wrote:

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message
news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com>
wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you >>>>>>> see it? In detail, in color? Can you rotate it on any axis and see >>>>>>> it moving? Can you look down on it from the top and see which way >>>>>>> the stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real.
https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance
or the plotting of a Smith Chart without recourse to them.

Certainly complex impedances can be visualized and analyzed in time
domain. Better than in classic slide-rule-days RF terms.

There certainly is a highly useful role for TD in this area. In fact by
using a TDR and a VNA together one can disintangle multiple reflections on
a network and uncover discontinuities that are obscured by other
reflections. I really should get a TDR; it's about the only piece of test
kit (apart from a curve tracer) I don't own. Must remedy those
shortcomings as a priority!

TDR is a fabulous tool. You can see exactly where things are happening
on a board or in a box, and fix it there. That's really hard to do in
the frequency domain.

You can also investigate urban legends, like the terrible effects of right-angle bends in PCB traces.

I don't have a curve tracer and don't miss it. The occasional subtle semiconductor measurement can be done with bench instruments. A
classic curve tracer won't report capacitance-vs-voltage, or pA
leakages, or step-recovery, or any really interesting stuff.

Data sheets have curves.

It would be fun to have a small USB curve tracer that does measure
capacitances and fA currents.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 2024-12-31 3:11 p.m., Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you
see it? In detail, in color? Can you rotate it on any axis and see it
moving? Can you look down on it from the top and see which way the
stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real. https://www.youtube.com/watch?v=T647CGsuOVU

Carp, another youtube rabbit hole!

John ;-#(#

But we can build the circuit, and it might work.

or it may be 'lateral'...

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
#7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 31 Dec 2024 21:01:08 -0500, Edward Rawde wrote:

"Cursitor Doom" <cd999666@notformail.com> wrote in message news:vl24d4$2e828$2@dont-email.me...

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message
news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com>
wrote:

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you >>>>>> see it? In detail, in color? Can you rotate it on any axis and see >>>>>> it moving? Can you look down on it from the top and see which way
the stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real.
https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance
or the plotting of a Smith Chart without recourse to them.

But do they exist?
https://www.youtube.com/watch?v=ALc8CBYOfkw

From our PoV, that's irrelevant. They're a very useful expedient without
which our lives would be rather more problematic.

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On 2/01/2025 2:45 am, john larkin wrote:

On Wed, 1 Jan 2025 01:05:40 -0000 (UTC), Cursitor Doom <cd999666@notformail.com> wrote:

On Tue, 31 Dec 2024 18:11:38 -0500, Edward Rawde wrote:

"john larkin" <jl@glen--canyon.com> wrote in message
news:sls8nj55tqh3u77h1vqbnvffs0vjjd7oo3@4ax.com...

On Tue, 31 Dec 2024 17:30:55 -0500, DJ Delorie <dj@delorie.com> wrote: >>>>

john larkin <jl@glen--canyon.com> writes:

Close your eyes and imagine an apple in front of your face. Can you >>>>>> see it? In detail, in color? Can you rotate it on any axis and see it >>>>>> moving? Can you look down on it from the top and see which way the >>>>>> stem points?

The important thing to remember is... there is no apple.

Apples are real.

Except imaginary ones.

But some imaginary things might be real.
https://www.youtube.com/watch?v=T647CGsuOVU

They're real alright. You can't describe things like complex impedance or
the plotting of a Smith Chart without recourse to them.

Certainly complex impedances can be visualized and analyzed in time
domain. Better than in classic slide-rule-days RF terms.

Complex impedances don't exist in the time domain, which is
one-dimensional, and you can keep track of complex impedances with a
slide rule - mine had sine and cosine transformations built in. Tan
would have been tricky.

One has to wonder what John Larkin was taught at Tulane - he clearly
hasn't retained much of it.

--
Bill Sloman, Sydney

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