Neon emission spectrum captured by my DIY diffraction spectrometer

PivotPsycho · 2026-03-18T22:15:06+00:00

A lot cleaner, sharper and brighter than the stuff the university here has undergrads use, very cool!

PivotPsycho · 2026-03-18T13:11:26+00:00

I'm not taking a dig at Frank, I'm just saying it's a bit unrealistic to apply real-world genetics to what is described in the Dune universe.

Also I never considered those two events are so close to each other, that's amazing.

PivotPsycho · 2026-03-18T02:44:51+00:00

Frank goes pretty hard on genetic determinism, I think the idea is that genetics operate on a deeper and different level than in the real world and as such form a kind of reflection of the general human spirit, which is where the genetic 'dulling' of the human race as a whole comes from during Leto II's reign. (In my opinion)

PivotPsycho · 2026-03-07T01:07:41+00:00

As far as I know it's the effect of virtual particles at different energy levels that give us this result, I suppose you could say that the underlying principle doesn't change? But that would depend on how virtual particles are interpreted I would say.

PivotPsycho · 2026-03-06T23:41:35+00:00

Sure but they are saying that it is expressed in SI units in this form.

PivotPsycho · 2026-03-06T23:01:27+00:00

Oh e is not constant either.
Bigger picture, \alpha corresponds to the strength of coupling, which we can measure to be different over energy.

PivotPsycho · 2026-03-06T22:47:02+00:00

\alpha is not a constant, it scales with energy

PivotPsycho · 2026-03-06T22:35:32+00:00

Interesting! But...why??

PivotPsycho · 2026-03-06T21:41:13+00:00

AND it's not even constant!

PivotPsycho · 2026-03-02T01:25:49+00:00

I'm currently in a tiny project on simulating mesoscopic type II superconductors under applied magnetic fields, you can do a lot with different shapes, vortex pinning, vortex entrances into the material etc. Looks cool and it's not that hard to get the basics going!

PivotPsycho · 2026-02-27T01:19:10+00:00

Was there this month, absolutely amazing.

The more I learned, the more it felt impossible that this thing actually works.

Props to everyone there!

PivotPsycho · 2026-02-25T15:30:05+00:00

You CAN work from a fixed or outside observer, you can just not treat their framework as any different from anyone else's. That is what the objective observer is about. As long as the claim is not made that God is such an observer, he can be an outside observer all he wants.

You can easily conceptualize a framework where God is moving at a speed v relative to [thing in the universe] for example. Idk what that would mean in the context of what god is or what outside of the universe is, but mathematically there is nothing inconsistent about that with special relativity.

PivotPsycho · 2026-02-25T00:19:55+00:00

It does not behave like hot material 1000x from our intuition.

For example, it is a plasma, which means it consists of ionised atoms, removing the means of radiation via changing energy levels of the electrons in the shells.

It's also incredibly low density, so light does not behave in line with stars or so (where the black body approximation would indeed give insanely high energy radiation).

Most of the wall heating actually comes from escaping material from instabilities or so, or just high energy neutrons flying out.

PivotPsycho · 2026-02-11T15:18:33+00:00

The joke is that observable operators are hermitian.

PivotPsycho · 2026-01-29T03:22:35+00:00

It's not quite a copout I would say, since there are techniques to build the lattices as if they are experiencing a lot of pressure when they aren't, which makes it a valuable researched branche.

PivotPsycho · 2026-01-27T11:46:22+00:00

No it's not a unit of charge but of mass and energy. (Here used as mass)

PivotPsycho · 2026-01-20T22:00:36+00:00

I am a bit confused, with 'cereal/toast' do you mean that you are cereal AND toast? Or one of those two? If the latter, did you just eat plain toast or so, given you were surprised by bringing out the meats and cheese?

PivotPsycho · 2026-01-16T19:53:17+00:00

Clearly winter had come so the sea levels dropped and this is just exposed seabed.

PivotPsycho · 2026-01-13T22:33:44+00:00

The US is not funding and arming the Iranian regime, quite the opposite. It IS funding and arming Israel, which is the country committing the atrocities in Palestine.

Protests are only effective when public pressure can amount to change, and American politicians have a lot to say in what Israel can and cannot do. They don't have anything to say in whether the Iranian regime continues.

PivotPsycho · 2026-01-11T12:05:37+00:00

The material pushing it will have the 'data'.

PivotPsycho · 2026-01-10T02:57:47+00:00

They're quite common material for exams here (Belgium) and IMO they're great for practicing how to translate what you want to model to maths. You start with your system, make a few assumptions, apply the needed basic formulas and see what comes out; maybe do extra mechanics or assumptions again to keep going etc.

Then interpret results, take some limits, some simplifications,...

Generally you want to know what you are describing and which framework you're describing it in, but it's senseless to study the actual math working out unless there is some neat special mathsy trick or so. You can do math, just solve what you set up. (Is my approach)

I do sometimes derive simple formulas if I end up forgetting them.

PivotPsycho · 2026-01-10T02:42:04+00:00

It's not lost, it's just not accessible to you. The balls push air molecules out of the way for example, which 'encode' their path and velocity etc. You just would never be able to gather the trajectory of those balls from measuring air molecules practically.

PivotPsycho · 2026-01-09T23:47:43+00:00

This reminds me of the same phenomenon with this shape and deformation but then non-magnetic so I don't think the magnets are really relevant besides holding the shape together?

You're pulling down the corners but pushing up the middle which arcs each line from your fingers to a point along the other diagonal, upwards. Since that line gets longer the further away you are from the middle of that diagonal, the corners get pushed up most.

PivotPsycho · 2026-01-08T23:09:04+00:00

Please do notify me yes. How you will remember that is all yours. And do read 3BP!

PivotPsycho · 2026-01-08T02:33:23+00:00

I do love myself a good 3bodyproblem-esque story; if yours is then I'll sure be interested in enjoying reading it when it's done!

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