maxnoe

5 ms·

1.
by maxnoe 5d ago
Cherenkov radiation is UV to visible blue light, it travels at the speed of light in the medium, which is lower than the speed of light in vacuum. Only the charged particle that induces the emission travels faster than the local speed of li
2.
by maxnoe 5d ago
Astronauts have reported having difficulty sleeping due to cosmic-ray-induced Cherenkov flashes in their eye bulbs.
3.
by maxnoe 5d ago
Very shortly summarized, only if the particle is faster than the local speed of light, you get constructive interference between many atoms that were polarized by the moving particle. For a slower than light particle, you also get emission,
4.
by maxnoe 5d ago
Neutrinos are neutral particles, they do not carry an electromagnetic charge. They thus do not cause any Cherenkov light themselves. What Neutrino detector measure is the Cherenkov light emitted by secondary particles that are created when
5.
by maxnoe 5d ago
The article has a section about what it can be used for, but only mentions the uses of the IAEA. Of course I am biased because I work in the field, but the by far most wide reaching application of Cherenkov radiation is in the detection of
6.
by maxnoe 14d ago
For industrial computers and other embedded systems. Computing AFAIK is very much still based on RHEL-based distros, Alma Linux specifically. https://linux.web.cern.ch/
7.
by maxnoe 2mo ago
Because he composed the anthem?
8.
by maxnoe 2mo ago
Who blatantly ripped that off from Karl Marx...
9.
by maxnoe 2mo ago
> The square root of -1 doesn't correspond to any quantity you could count or measure directly (you can't have negative one apple, for instance) That must be the worst explanation of complex numbers I ever read. It's not e
10.
by maxnoe 2mo ago
Unix time does not count elapsed seconds in real time since 1970-01-01T00:00:00, this is a common misconception. Unix time assumes a fixed number of seconds per day. 86400. If a leap second is inserted, either end of June or end of December
11.
by maxnoe 2mo ago
No, the current rules are being relaxed because with the current ones, a negative leap second _might_ happen in the near future. It did not happen yet. No negative leap second that should have been inserted was skipped. See this chart here:
12.
Incident with Pull Requests, Issues, Git Operations and API Requests(githubstatus.com)
335 points by maxnoe 4mo ago|208 comments
13.
by maxnoe 4mo ago
GitHub Incident again/
14.
by maxnoe 5mo ago
Imaging Atmospheric Cherenkov Telescopes, we detect optical light emitted by high energy particle Cascades in the atmosphere to observe cosmic gamma radiation. The particles need the atmosphere to interact, Cherenkov light is only emitted i
15.
by maxnoe 5mo ago
One would be support for ligatures
16.
by maxnoe 5mo ago
Our telescopes actually need the (or at least an) atmosphere to function. There are some classes of observatories, which you cannot build in space but which are still affected by satellites to some degree.
17.
by maxnoe 5mo ago
> This is where I usually insert that 3,000 year old Gandalf meme. Elrond?
18.
by maxnoe 5mo ago
Copying my comment from the other recent thread: The authority on the definition of SI units is very clear: > The hertz shall only be used for periodic phenomena and the becquerel shall only be used for stochastic processes in activity r
19.
by maxnoe 5mo ago
Keep in mind that our current instruments are not really sensitive to most exoplanets that would be interesting for a sci-fi setting. Current instruments are mostly good at finding large planets around small stars, we are basically blind to
20.
by maxnoe 5mo ago
Please don't. The authority on the definition of SI units is very clear: > The hertz shall only be used for periodic phenomena and the becquerel shall only be used for stochastic processes in activity referred to a radionuclide Neit
21.
by maxnoe 5mo ago
Yes, the year has pi * 1e7 seconds 1e5 / 3.14e7 ≈ 3e-3, milli, not micro
22.
by maxnoe 5mo ago
Or as Stephen Fry put it: "Nature, Nurture and Nietzsche", very fitting here.
23.
by maxnoe 6mo ago
There is a section in the GitHub Readme of Eurooffice with a justification of the fork: https://github.com/Euro-Office#euro-office-liberates-the-onl...
24.
by maxnoe 6mo ago
"Most companies still do not publish Linux builds for creative software" There, fixed it for you. It's not like Linux is the blocker here.
25.
by maxnoe 6mo ago
Absolutely not. You could argue this for entry level lectures, but not at the PhD level. PhD is learning how to do original research, how could you separate teaching that from doing that?
26.
by maxnoe 6mo ago
Ever tried latexmk for the automation?
27.
by maxnoe 7mo ago
But this exact example is different, because the critical step of mutation is missing. The initial line is the same, but: a = b = random.random() a += 1 a == b # False Only because floats are immutable and thus an implicit
28.
by maxnoe 8mo ago
Science never proves a positive. You can only disprove . The only way to prove a positive if there is a finite number of possibilities and you have disproven all but one. But even then, someone could conceivably come up with an alternate d
29.
by maxnoe 8mo ago
If you are more into doing this locally than using a Webservice, have a look at astroplan based on astropy. https://astroplan.readthedocs.io/en/stable/
30.
by maxnoe 8mo ago
If it disagrees with experiment, it's wrong. https://youtu.be/EYPapE-3FRw?si=LjSNyltYaVUY5bzX

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