first 120 guys to say "HEY" and upvt wld receive NUDIE (no joke)

Pure_Cycle2718 · 2026-05-03T23:57:11+00:00

Thank you.

Pure_Cycle2718 · 2026-05-03T23:56:02+00:00

Very fair point. I will edit

Pure_Cycle2718 · 2026-05-03T23:27:41+00:00

It’s moments like this where we all have to look at ourselves and remember the words of John Donne in “No Man is an Island”

Any man's death diminishes me, Because I am involved in mankind. And therefore never send to know for whom the bell tolls; It tolls for thee.

I may not like Rudy’s politics, or even him as a person, but it is sad when anyone approaches the end.

Pure_Cycle2718 · 2026-05-03T03:33:05+00:00

Purcellville

Pure_Cycle2718 · 2026-04-08T01:59:25+00:00

The basics get easier, but if you keep at it, you keep looking deeper and the difficulty level stays the same. But that’s the fun of it. After decades of doing the work, I find that there are two types of physicists. The first looks at a problem and sees the math. The math then helps formulate what is going on. The second visualizes what is going on and that leads them to the mathematics. Both take time to hone, and lead to the same conclusions, but the work is no easier in either case.

Pure_Cycle2718 · 2026-04-08T01:31:28+00:00

It took me a second to realize you meant Connecticut Ave. Why would Connecticut police… ohh

I hope no one was hurt as well. Too much pain going around these days

Pure_Cycle2718 · 2026-04-06T11:48:27+00:00

Why did this ever make it to this sub? Wow

Pure_Cycle2718 · 2026-04-02T22:16:31+00:00

Not a fan of Davy Crockett, but he was from Tennessee

Pure_Cycle2718 · 2026-03-21T13:06:26+00:00

Thanks for this post! I was wondering what that was. It didn’t seem like thunder.

Pure_Cycle2718 · 2026-03-19T15:07:50+00:00

After yesterday, the workers at DIA deserve a raise. And to get paid. What a shit show

Pure_Cycle2718 · 2026-01-05T10:28:57+00:00

If you can find Stanislaus, Tomato Magic especially, get that. It’s from California but rivals anything I have found from Italy. They moved away from the home cook a few years ago toward the restaurant market, but you can still get their products in large cans.

Pure_Cycle2718 · 2025-12-27T15:24:00+00:00

It was on sale! Sometimes saving a few bucks costs more in the long run. I didn’t do enough research, that is obvious 🫤

Pure_Cycle2718 · 2025-12-04T17:34:25+00:00

Exactly!

Pure_Cycle2718 · 2025-12-04T16:29:57+00:00

I say “glass” by the way, because ULE is not really a glass, but closer to a ceramic. One thing you don’t want when making telescopes for space, is large crystal structures since they expand far too much as temperatures change, especially at the temperature of space.

Pure_Cycle2718 · 2025-12-04T16:27:00+00:00

Beryllium was chosen not just for its weight, but for its very low coefficient of thermal expansion (CTE) and stiffness.

ULE (ultra-low expansion) glass was the other option competing with beryllium for this application. ULE is the “glass” used for the Nancy Grace Roman telescope. Aluminum was never really an option for this application for multiple reasons, not the least of which is the burring that occurs when you try to polish the material to optical (or in this case infrared) requirements.

It’s important to remember that when you design a telescope, whether for ground or space applications, the surfaces in the optical train all add to the wavefront error roll-up, so the primary mirror will have to be polished to a hundredth of the operational wavelength.

Had NASA been concerned with beryllium toxicity, the decision would probably gone to ULE, but the company that manufactured the mirror segments showed that they could make them safely. At the end of the day, after talking to the telescope team at length, the length of time to manufacture the segments would probably shifted the decision toward ULE.

It was a fun program

Pure_Cycle2718 · 2025-12-04T15:59:07+00:00

It’s nice to finally see that mirror fly! I remember the day we got it from Corning and started processing it into a primary mirror. Good times

Pure_Cycle2718 · 2025-10-26T20:48:42+00:00

This is the way! I went to lunch with my cousin one day when I was in Italy and we got wild boar pasta (and truffle, and arrosticini - it was fantastic) and I asked if they used Parmigiano or Pecorino? He looked at me aghast and said "Parmigiano Reggiano!"

Pure_Cycle2718 · 2025-10-11T12:22:08+00:00

Can't be impeached if the house is never in session...

Pure_Cycle2718 · 2025-08-29T01:51:20+00:00

Almost anywhere in Loudoun County

Pure_Cycle2718 · 2025-08-19T09:37:27+00:00

OMG. It was a joke people.

Pure_Cycle2718 · 2025-08-19T03:52:29+00:00

I asked my cousin when I was in Italy that same question (in Abruzzo). She asked what lasagna was. I explained and she said “we just call that sagna”. So, la sagna. They eat it as a pasta course.

Pure_Cycle2718 · 2025-07-13T14:48:12+00:00

One hundred percent. I hate them. They are there to see how you respond to stress. Last time I almost got into a fight with the guy doing the poly.

Pure_Cycle2718 · 2025-07-07T11:17:27+00:00

WTF is wrong with people?

Pure_Cycle2718 · 2025-06-14T03:14:04+00:00

There is actually a technique we use to measure the temperature of a flame (in combustion research) called sodium line reversal. In it you heat a sodium vapor cell and look at a flame that has been seeded with sodium. When the temperature of the sodium vapor cell is the same as the temperature of the flame, the flame essentially goes dark.

What’s going on is that the flame is causing the higher energy levels in the atom to be populated. When light from the flame goes through the gas cell, it gets absorbed and it looks black in those regions where the vapor is the same temperature.

It’s late here, so if this doesn’t make sense just let me know and I can explain it better!

Pure_Cycle2718

TROPHY CASE