robryk @robryk@qoto.org

@_thegeoff

> Sorry for not being clearer: I was thinking more of the spatial coherence than spectral.

Or, actually, to be more precise, I was wondering how similar the situation is to a multitude of emitters emitting at different frequencies, esp. as far as phase coherence between them would manifest. (For non-spatially coherent sources the obvious answer is that you have all the possible phases coming from different directions.)

@_thegeoff

> The spectral lines are all single wavelengths when emitted

That's certainly wrong: the excited states would be stable if they were energy eigenstates. Are you saying that rotational Doppler smear is much larger than this?

> Further complicated by interstellar hydrogen clouds absorbing different wavelengths depending on their relative velocity, causing the "Lyman-alpha forest", which is a great name for a prog-rock band.

TIL. Thank you very much. Do I UC that this basically applies a filter (so can shift peaks only insofar they are not ideal Dirac deltas)?

Sorry for not being clearer: I was thinking more of the spatial coherence than spectral.

@mcc

You might wish to look up time delays involved in using melatonin first: I don't remember what they are but I do remember that they sounded unintuitive to me.

@_thegeoff

Unless I get distracted, I will probably try to make loudnesses of different frequencies to scale.

Now that I think of it: do stars produce coherent light from our POV?

@cstross

It sounds useful as a source of poison and a component of a trap.

@_thegeoff

I'm surprised to hear beats, given that I don't think I've seen destructive interference of nearby peaks in spectrum ever. Where does this difference come from?

@_thegeoff Huh, what? I meant that the fillings are usually made from thin (<2mm iirc) layers of a resin that the dentist shapes (or, for the first one, allows surface tension to shape) in a prepared hole in a tooth and solidifies with a UV lamp.

@_thegeoff

making something solid with light... doesn't that also include (the currently most typical) dental fillings? :)

@tadzik @rogatywieszcz

Eh, też jest https://github.com/osmandapp/OsmAnd/issues/15058

Niby nie jakieś bardzo straszne (ktoś ma log który dla każdego klienta ma historię trójek (czas, adres IP, jakie mapy ściągał) niepowiązaną z niczym innym), ale konwersacja na tym bugu nie napawa mnie wiarą w rozsądek ludzi od osmand (zarówno dlatego, że oznaczyli komentarze gościa zgłaszającego jako "abuse" jak i dlatego, że przez pierwsze ileśtam stron nie przyznali, że czasami to może jakieś informacje wyciekać, nawet jeśli zgłaszający to przerysowuje) :(

(Sytuacja kiedy ten ID zwiększa wyciek to np. taka, w której po zbiorze IP i czasów ściągania map można kogoś zidentyfikować.)

Jednocześnie argument za tym ID jest trochę bez sensu: jeśli chcemy limitować ile _uczciwy klient_ ściąga, to spowodujmy żeby klient po prostu ściągając zgłaszał ile już danego np. dnia ściągnął, albo wysyłajmy ID które się zmienia codziennie.

@_dm

They silently imply that current prices are sufficient to cover costs (or at least costs-as-they-will-be-soon). I'm not sure that's true.

@emery @CurlyParakeet

Iirc when I was in primary school we were supposed to write with fountain pens and iirc the reasoning was that this forces you to hold them in a smaller range of positions from the very beginning (as in, gives you feedback of the "won't write" kind if you keep them too perpendicular to the paper).

@shusha Also, the worsening of renter protections was repealed (though by a smaller margin).

@_dm We often base policies on what's possible to ensure, or possible to prove to an auditor. For example, we might declare that owning a high power laser pointer is illegal, because pointing it at people is something that's hard to prosecute. Isn't this another example of such an approach?