cshimmin

20 ms·

181.
by cshimmin 5y ago
And at the risk of muddying the original point, it turns out that strictly speaking the neither the neutral Z boson nor the electromagnetic photon can be said to come from SU(2) or U(1). Instead, each field is a linear combination of some a
182.
by cshimmin 5y ago
Actually since it's a spacetime potential, it's a 4-vector valued. So it's related to both the (three-)vector potential A and the scalar potential V.
183.
by cshimmin 5y ago
The simple answer is "because we can". In general, physicists have found that we should write down the most general mathematical theory compatible with what's observed. A famous example of this is Einstein's cosmological
184.
by cshimmin 5y ago
There are scientific applications for this kind of procedure. If an experiment has a noise source with a known frequency distribution, you can simulate the experiment by generating many thousands of realizations of noise superimposed with y
185.
by cshimmin 6y ago
Uh, no GP's usage was fine. Take Collins dictionary: "If you refer to an express intention or purpose, you are emphasizing that it is a deliberate and specific one that you have before you do something". Perhaps you are think
186.
by cshimmin 6y ago
Fascinating idea. The neutrinos travel at effectively the speed of light and can be sent directly through the earth, providing a minimum-distance "line of sight" between any two points on earth. However, the same property that al
187.
by cshimmin 6y ago
D'oh you are correct. I'm always getting my Dakotas mixed up. I should have also added that this is not my specialty (I work on the ATLAS experiment at the LHC in Switzerland).
188.
by cshimmin 6y ago
Particle physicist here! Actually it's pretty easy to generate intense neutrino beams. You just have to accelerate protons and smash them into a lead wall. This produces all kinds of particles, including for instance muons. Since muons
189.
by cshimmin 6y ago
Hold on, do I understand correctly your comment about the 20% false positive rate? So even if exactly ZERO Americans were experiencing depression, a random sampling would indicate 20% of Americans are showing signs of depression? And if it&
190.
by cshimmin 7y ago
TFA shows a slide w/ data from Nielson. Apparently 71% of people do.
191.
by cshimmin 7y ago
If you only pay attention for 10% of the content, GoT is much lossier than baseball. Sparse vs dense would be more sensible terminology.
192.
by cshimmin 7y ago
(1989)
193.
by cshimmin 7y ago
Okay we get it, you blaze.
194.
by cshimmin 7y ago
In my experience (as a physicist), the dagger is much more common in physics literature to represent adjoint; A^* for adjoint is confusing because it could just mean complex conjugation in many contexts. Overlines are practically never used
195.
by cshimmin 7y ago
D'oh you are correct! It's a bit late here. Anyways the rest of my point stands about the author's intent. To connect that to your original comment: a rotation is not "observable", instead, it's a transformatio
196.
by cshimmin 7y ago
Particle physicist here... it's a very long article and there's a lot going on, so I'm not sure what you're seeking clarification on. But I'll take a whack at it: As far as we know, neutrinos come in three varieties
197.
by cshimmin 7y ago
Rotation matrices are hermitian. It's a popular science article, but the author is alluding to the fact that Hermitian matrices have real eignenvalues. In quantum mechanics and quantum field theory, all _physically observable quantitie
198.
by cshimmin 7y ago
More than 40% of Americans have a passport. The 10% figure hasn't been accurate since the early 90s: https://www.forbes.com/sites/niallmccarthy/2018/01/11/the-sh...
199.
by cshimmin 7y ago
I don't think that's how day trading is supposed to work. Successful day traders are supposed to make money whichever way the market is moving, by taking short positions when the market is going down and long when the market is up
200.
by cshimmin 7y ago
The author notes this in the article.
201.
by cshimmin 7y ago
The first point sounds pretty farfetched, do you have some sources to back this up, or is it just a conspiracy theory you cooked up because it suits a narrative? Tye second point is ridiculous, you could make the same argument and say that
202.
by cshimmin 7y ago
Not an expert but I'll give it a shot: Company has extra money and wants stakeholders to get a cut. They can either give all the stakeholders some money based on how much stock they have (this is called paying dividends), or they can b
203.
by cshimmin 7y ago
It's really not... it's comparing dollars to dollars. If anything, the only thing you should modify is maybe to consider how much the Avengers would have cost to produce in India. But in any case, it's certainly relevant to c
204.
by cshimmin 7y ago
The whole point of these missions is for countries to learn how to make the wheels (and demonstrate to all the other countries that they can).
205.
by cshimmin 7y ago
Wow. I have never heard someone articulate so clearly my own experience with ADD. Would love to read more about how you've managed your shifting responsibility/lifestyle!
206.
by cshimmin 7y ago
Good luck manually writing a program that achieves state of the art performance on any typical machine learning task... we'll see which "training" method takes longer.
207.
by cshimmin 7y ago
Your point is that training is computationally intensive, but your question is "why do people obsess over training"? Sounds like you've answered your own question, then. It's currently hard to train networks, so people &
208.
by cshimmin 7y ago
Well, that's a bit like asking "what's with the obsessive emphasis on programming computers, after all they're just objects that compute?" Yes, neural networks are objects that compute; there's even this "
209.
by cshimmin 7y ago
I don't think the author presented any evidence that invalidates the assumption of IID colors. They show a histogram of the different counts of each color, which seems more or less consistent with a uniform distribution. There are some
210.
by cshimmin 8y ago
Right... From the stats from Yale linked above, the median net cost after financial aid is $12.5k. That's a lot less than I paid to go to a public university. As for a "license to do anything", it's not clear what exactl

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