evanb

18 ms·

181.
by evanb 3y ago
That's what I was getting at. Maybe we disagree about what calibrate means?
182.
by evanb 3y ago
You can't take a written standard and put it into your mass spectrometer (or other equivalently fancy food-testing device) to calibrate it.
183.
by evanb 3y ago
'I can tell from some of the pixels and from seeing quite a few shops in my time.'
184.
by evanb 3y ago
USB is the only macroscopic fermion I know. Try to plug it in and fail, rotate it 180˚ and fail, rotate 180˚ and it plugs in. Must be the minus sign.
185.
by evanb 3y ago
Associate ≠ adjunct. Associate means that the person is one of the junior faculty, adjunct (typically) means the person is someone who might teach a class or supervise graduate students. But an adjunct doesn't have a vote in faculty
186.
by evanb 3y ago
As a computational physicist, I often hear people in industry talk about "big data" and then laugh when I understand the amount of data they're talking about. I once accidentally wrote a hundred TiB to tape as part of a side
187.
by evanb 3y ago
16Oxygen is well-characterized using a variety of ab initio nuclear many-body strategies, partly because it is doubly magic and has an equal number of protons and neutrons. Even though 28O is doubly magic, the unequal number of protons and
188.
by evanb 3y ago
In the standard model the (proton, electron) is the lightest particle charged under the global (baryon number, lepton number) conservation respectively. So they are truly stable according to the SM. However, there are many good reasons to
189.
by evanb 3y ago
Indeed it does. But the Earth is so light and the orbit so long that the power emitted is very very low. The sun will explode long before the Earth's orbit will be noticeably modified due to energy loss by gravitational radiation. T
190.
by evanb 3y ago
Spacetime warps in the presence of mass, yes. But the full answer is that spacetime warps in the presence of energy/momentum; Einstein's field equations make no mention of mass specifically, except that via E=mc^2 masses are ener
191.
by evanb 3y ago
"If they ever come up with a swashbuckling school I think one of the courses should be laughing, then jumping off something." -- Jack Handey I tried to register for pistol every single term and never got in; I think this may be th
192.
by evanb 3y ago
Cool it down until you DO see a SC transition far below room temperature.
193.
by evanb 3y ago
If you express it in a different unit system all E, m, and c will take different numerical values, but the relationship will still be true. So there’s nothing special about the metric system. When we want to discuss this kind of relationsh
194.
by evanb 3y ago
I walked. https://www.passwordstore.org/
195.
by evanb 3y ago
The complaint is that there were already perfectly good 1Pw "backends" that didn't need any reverse engineering at all: wifi sync, and dropbox. But they took them away. The complaint is: why the fuck did they do that?
196.
by evanb 3y ago
Xpositions
197.
by evanb 3y ago
Indeed; it's related to the whole tower of large numbers etc. There's no escaping the Halting Problem. It's just a matter of which level of halting "bites us". Anyway, I hope I've convinced you that the appea
198.
by evanb 3y ago
I think we have a slight disagreement. My machine is _not_ a Turing machine. Given any program that can only take countably infinite steps my machine halts. If you like, you can think of it as an oracle for the Halting Problem. But the
199.
by evanb 3y ago
The UK doesn't put the country of origin on their postage stamps, because they invented them [1], so there were no ambiguities to lift. That's the same reason the US is +1 country code and holds .gov [1] https://en.wiki
200.
by evanb 3y ago
Along the same lines, the "Math is limited by math" really contains a hidden physical assumption, which is this: the (quantum, extended) Church-Turing thesis is an assumption about physics. The (classical version of the) argument
201.
by evanb 3y ago
I don't have a good introductory reference, to be honest. I was first exposed to it (and RG) in my 2nd year in physics grad school, and to be frank did not understand it at all then (partly due to crap teaching).
202.
by evanb 3y ago
Do you really know it breaks Z2 rather than something else? There are plenty of symmetry breaking patterns that correspond to observables which go from <x^2> = 0 to (<x^2> ≠ 0 and <x> = ±some mean if you don't tunnel
203.
by evanb 3y ago
A quantum phase transition is also like a change in a potential well; it's just that the control parameter is not temperature but some other parameter of the Hamiltonian. There is a lot known about universal critical phenomena, hence m
204.
by evanb 3y ago
This reminds me of Dream of Pixels, which I go through phases of playing obsessively (highly correlated with long flights). http://dawnofplay.com/DreamOfPixels/ https://en.wikipedia.org/wiki/Dream_
205.
by evanb 3y ago
Is this more like a thermodynamic transition, or a zero-temperature quantum phase transition? Do you know anything about the thermodynamic limit? From your figures it seems that the phase transition second (or higher) order. If it's
206.
by evanb 3y ago
I don’t know but freezing and boiling of water are separated by 180 degrees F.
207.
by evanb 3y ago
dbar is pretty common in lattice field theory notes (though I've never seen it in a book), where it is used because fourier integrals naturally come with a 1/2π.
208.
by evanb 3y ago
The primary explanation: http://datacolada.org/109
209.
by evanb 3y ago
Could the AKS primality test, which showed that PRIMES is in P, be implemented as an honest regular expression? Presumably not because then we'd know that PRIMES is not just in P but is a regular language, which would be too good to b
210.
by evanb 3y ago
A saboteur is someone who throws their clogs into automated looms https://en.wiktionary.org/wiki/saboteur

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