evanb

82 ms·

511.
by evanb 6y ago
> treated as extra-disposable and second class I suppose it depends on the eye of the beholder. Humans aren't disposable.
512.
by evanb 6y ago
Only if you take U(1) as your gauge group. If you pick a non-abelian group the equations are not linear and solutions are not superposable.
513.
Spotify wants to be the go-to for podcasts. Creators and audiences should worry(washingtonpost.com)
1 points by evanb 6y ago|0 comments
514.
by evanb 6y ago
Interestingly, loom patterns are direct progenitors of software. QI discussed this in series J: https://www.youtube.com/watch?v=F7r1GnG9cQ8
515.
by evanb 6y ago
It seems they have fallen into the age-old trap of confusing unicorns with Pegasus.
516.
by evanb 6y ago
Lattice QCD, especially near the physical point, has poorly-conditioned matrices that one wishes to solve Mx=b for. The state-of-the-art is that the [sparse] matrices can be as large as 4×3×(128^3 × 192) ~ 5e9 on a side. It's not so
517.
by evanb 6y ago
Sort of. As a physicist I'd also say we have different sets of intuition, different willingnesses to play fast and loose or to make heuristic arguments (for a good example, consider the history of the Dirac delta function). Certainly
518.
by evanb 6y ago
I installed the `Shut Up` Firefox extension and now only see comments on places where I actually, actively, want to see the conversation. It changed my experience of the internet.
519.
by evanb 6y ago
I am a physicist. It is perfectly possible to formulate theories of physics in higher spatial dimensions. In fact, many high-energy theories like string theory require many spatial dimensions for mathematical consistency. It is something
520.
by evanb 6y ago
I'm a former LLNL lattice QCD postdoc and current user of the LLNL machines (and others). I have to say, I was wildly spoiled. Every other computing center where I have an account cannot hold a candle to the helpfulness of the LLNL su
521.
by evanb 6y ago
There's a great hack showing the Johnny Cash original version of the song, http://www.johnnycashhasbeeneverywhere.com/
522.
by evanb 6y ago
It's plausible that a user on stack exchange who has known of .bashrc, .kshrc, and others, for 10 years has never heard of google and doesn't know how it works? If it were, the user _probably_ learned of google intervening ten ye
523.
by evanb 7y ago
Carroll is a graduate-level book, and MTW is notorious. I'd start with Hartle, or something even lower-level.
524.
by evanb 7y ago
Because the gravity is stronger in these cases it's possible that effects not captured by Einstein's theory could be seen, just as Mercury probed stronger fields, falsifying Newton's theory. But Einstein's theory surviv
525.
by evanb 7y ago
Well, sure, but that only pushes the question back one step further: who told you which action to pick? Why pick R and not R^2, for GR, for example? [ Just to avoid someone spending too much time on an explanation IAAPhysicist; yes I unde
526.
by evanb 7y ago
General relativity is (sort of) a classical field theory; it isn't crazy to put it under models, in the same way that QFT is under 'theory' but the standard model is under 'models'.
527.
by evanb 7y ago
π and e are not algebraic numbers. So the set of "useful" (read: definable) reals is larger than the algebraic numbers.
528.
by evanb 7y ago
In the US "paper towel" usually refers to kitchen roll. Kitchen roll is designed to be strong when wet, unlike toilet roll, which is designed to dissolve when wet.
529.
by evanb 7y ago
I'm a lattice field theorist, exploring how to leverage NN in algorithms for quantum field theory that remain exact even with NNs in them, so that the NNs just provide acceleration. One annoying thing I've encountered is that I ha
530.
Ask HN: Good, Affordable Work-from-Home Setup?
1 points by evanb 7y ago|1 comments
531.
by evanb 7y ago
Even the Boston-side fraternities are subject to licensing as dormitories. It’s unlikely FSILG Alumni corporations would kick someone out but it could put the license at risk. If MIT says they’re closing Boston can consider that to be a su
532.
by evanb 7y ago
If it is Spreadshirt, doesn't going by `Lan Tim 2' violate Facebooks real names policy? Or is that just for peons?
533.
by evanb 7y ago
Entangled particles can be produced in a tabletop experiment, no need for an LHC.
534.
by evanb 7y ago
That actually IS the basic idea---there was almost a 1:1 annihilation. But it's not 1:1 exactly (look around you, matter everywhere). We quantify the baryon asymmetry as η = (n_baryons - n_antibaryons) / n_photons where the n_sp
535.
by evanb 7y ago
I think the author is saying that characters in Tolkein's world, who gave him the name 'Gandalf'='Wand Elf' must have thought him to be an elf, which would be evidence that those characters don't think it stran
536.
by evanb 7y ago
No. The no-cloning theorem is a real theorem of quantum mechanics. To discover a way around it is to find evidence of a new paradigm.
537.
by evanb 7y ago
They do blue or red shift in response to gravitational gradients and the like.
538.
by evanb 7y ago
When I moved to Germany I was staying in an AirBNB. The instructions were to just "Ring [Name on doorbell]". When I asked what the apartment or flat number was, it was an alien concept---the host just gave me the address again.
539.
Removing a GPS tracking device from your car isn’t theft, court rules(arstechnica.com)
42 points by evanb 7y ago|7 comments
540.
by evanb 7y ago
If the labels are supposed to indicate units, they should at least indicate the RIGHT units! rent, electric, and internet are dollars/month. Otherwise the 12480 in the example is dollars*months, clearly not the right units.

More ›