foxes

43 ms·

451.
by foxes 8y ago
Gravitational mass is not meant to be affected by charge / parity conjugation - so anti-matter `should` behave the same way in a gravitational field.
452.
by foxes 8y ago
If it's entirely determined by physical stuff thats a contradiction. It may be very complicated, but its still physical.
453.
by foxes 8y ago
How are genetic algorithms guaranteed in any way to give you a global optimum? I thought it might just work better when your search space is non smooth.
454.
Glyphosate perturbs the gut microbiota of honey bees(pnas.org)
1 points by foxes 8y ago|0 comments
455.
by foxes 8y ago
Actually, yes that book doesn't mention that entropy is Lorentz invariant, but I think there are papers on it [0]. However it doesn't actually look like they reach a decisive conclusion - it is still for debate. [0] http:/&#
456.
by foxes 8y ago
The EFThedron looks interesting, I have to check that out.
457.
by foxes 8y ago
> not produce a global "now" I thought that was just already accepted as part of relativity that there is no global now (I feel like you are saying there is no global interial reference frame?). I really mean that there is this
458.
by foxes 8y ago
Time does appear in fundamental concepts in physics? In relativity it is particularly important. Timelike dimensions are treated differently in the metric, with a +1 or -1 depending on taste, ie ds^2 = c dt^2 - dx_1^2 - dx_2^2 - dx_3^2, so
459.
by foxes 8y ago
I think it was Weierstrass who first gave a proper definition in terms of epsilon / delta (e,d). To say it more precisely: We say that the limit lim x -> c f(x) = L, if for all e > 0, there exists a d, such that for all x, if | x
460.
Surprising hidden order unites prime numbers and crystal-like materials(phys.org)
157 points by foxes 8y ago|39 comments
461.
by foxes 8y ago
Essentially from the definition of the derivative you can write f(x+h) = f(x) + h f'(x) + O(h^2). If you use this to solve differential equations its called the Euler method.
462.
by foxes 8y ago
Yes you are right, I wasnt clear, just that it seems nicer to visualise as a physical thing in an optical circuit. Also remember that you have to perform measurement multiple times. It produces a probability distribution, so you need to be
463.
by foxes 8y ago
I like optical quantum computing, it feels hands on, like it's almost something you could build in your garage. Linear optical quantum computers just need waveguides, beam splitters, phase shifters and mirrors (no disrespect - I know i
464.
by foxes 8y ago
Most reviewers (at least from my experience in maths and physics) don't get paid.
465.
by foxes 8y ago
The only real argument I think you can make is that it might be more efficient to have a neural network quickly spit out an approximate solution instead of solving the actual equations. But if you have the time having the actual equations i
466.
by foxes 8y ago
Better, why do people think they can predict long term dynamics of what is basically a chaotic system? I think finding some small local dynamics is fine, but applying a neural network to try say something about global long term dynamics com
467.
by foxes 8y ago
What is the connection with the continued fraction?
468.
by foxes 8y ago
I doubt that you can make batteries with a higher engergy density, otherwise they are quite explosive. How do you make them much lighter? Lithium is a pretty light material. Petrol is so energy dense because you are storing that energy in c
469.
by foxes 8y ago
Maybe it's a bit dated but IPE was always easy to use. https://github.com/otfried/ipe It would be nice to improve the interface a bit.
470.
by foxes 8y ago
I think the most general thing you could say is monadic mutations of some global state. Blocks act as operators on this state. I don't necessarily think it has to be a consensus algorithm. It can be used as that though.
471.
by foxes 8y ago
Original paper https://arxiv.org/pdf/0911.4706.pdf
472.
Researchers Solve Quantum Hall Conductance Problem(caltech.edu)
2 points by foxes 8y ago|1 comments
473.
by foxes 8y ago
Why should you have to use a "reader mode" in the first place? ++ As in it's a "workaround" for an issue that should never have been allowed to exist in the first place - bloat, ads etc. That aside, umatrix on firef
474.
by foxes 8y ago
To me it just seems convoluted. I think the fact that everyone has "cheated" to see it just shows that people like to take the path of least resistance. They have created this complicated solution when there is a much simpler one.
475.
by foxes 8y ago
[0] Yes a solution will transform under the symmetry to be another solution of the same equations. Perhaps for a bit of history Galois originally used finite groups to look for solutions to algebraic equations. You might find one solution a
476.
by foxes 8y ago
So in science, symmetry groups appear in physics in various forms. The ones more commonly found in physics are not exactly like the finite symmetry groups in the OP (I cant immediately think of a good example). Briefly, they are used to des
477.
by foxes 8y ago
I don't think the wavefunction is a physical object. It's just a mathematical abstraction to describe reality, theres no real justification to treat it as something physical?
478.
by foxes 8y ago
People are working on making Haskell compile to web assembly. [0] https://www.tweag.io/posts/2018-05-29-hello-asterius.html [1] https://github.com/tweag/asterius
479.
by foxes 8y ago
There is a nice blog with a lot of resources on this topic http://therisingsea.org/post/seminar-ch/
480.
by foxes 8y ago
I think that tool exists in some form already? Maybe its not perfect but uMatrix is a pretty powerful filtering tool. It gives you the option to block these third party domains - think of it as a firewall for your browser. Its built by the

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