petschge

22 ms·

241.
by petschge 7y ago
Do you have statistics on that? (Should be possible to get from openstreetmap using overpass queries, but I am busy with other things right now.)
242.
by petschge 7y ago
I think you mean John von Neumann.
243.
by petschge 7y ago
The National Radio Quiet Zone is not locked down either. There is a public road through Greenbank and the observatory there a very cool visitor center. I can recommend both the coffee and the tours they offer there. The office space for the
244.
by petschge 7y ago
The obvious counter point would be the neutrino.
245.
by petschge 7y ago
I said the same thing about UPS causing more trouble than preventing it. Then I moved to Africa and quickly learned that a local UPS can be VERY helpful.
246.
by petschge 7y ago
In civilized countries you are still payed if you are ordered into medically necessary quarantine. And you can not be fired for it either.
247.
by petschge 7y ago
Causes like not eating and drinking enough and not sleeping enough while already pretty sick?
248.
by petschge 7y ago
Actually there is several period detected in the brightness, one being ~420 days (give or take 10 days or so), another is ~2100 days. Several of those having a (nearly) simultaneous minimum might very well explain the stronger than normal d
249.
by petschge 7y ago
In astronomy we typically date events by observation date, not by date at the remote location. The reason is that distance is often poorly known and the estimates are subject to change over time. Time at the solar system barycenter on the o
250.
by petschge 7y ago
Have a look at the plot [1] from the excellent plotting tool [2] of the American Association of Variable star observers [3]. You see a strong dip in the U band (U for UV, 365 nm plus or minus 66 nm), B band (B for blue, 445 nm \pm 94 nm) an
251.
by petschge 7y ago
There is at least one preparation that you can take: Make sure you have enough (non quickly perishable) food and essentials such as tooth paste and toilet paper at home so you don't have to go out shopping if you are at home sick for a
252.
by petschge 7y ago
Sounds a bit like El Morro National Monument. https://www.nps.gov/elmo/index.htm
253.
by petschge 7y ago
You can do that with twin studies.
254.
by petschge 7y ago
You are not even allowed to take the organs of a recently dead body if the person did not agree to that before death. Why would you be allowed to do it to a live person?!
255.
by petschge 7y ago
Having a clone does not give you an identical copy of an adult person. All you get is an identical twin that is years younger and likely has additional medical problems. Why would you invest a lot of time and effort into that? Btw: The arti
256.
by petschge 7y ago
I am really torn on the subject. I write physics simulations for research use and will therefore assume a FDTD code that simulates Maxwells equations as an example. On one hand there is a bunch of minus signs in Maxwells equations and there
257.
by petschge 7y ago
Such things exists under the name "Computer Algebra Systems". Notable commercial offerings include Mathematica and Maple, but there is also free software such as Sage and Sympy.
258.
by petschge 7y ago
A big downside of that proposal is that everything takes up much more space, which makes it much harder to keep track of what else is going on. In toy problems it is fine, but in real problems having the answer to "did the code already
259.
by petschge 7y ago
There if for example https://github.com/NanoComp/meep
260.
by petschge 7y ago
While FEM is (rightfully) very popular, a lot of work on electromagnetism is done using finite-difference time-domain methods (FDTD) instead of finite-element.
261.
by petschge 7y ago
Well, it will not error out, but if you say #pragma clang loop vectorize(enable) and the loop is then not vectorized you will get a warning like warning: loop not vectorized: failed explicitly specified loop vectorization
262.
by petschge 7y ago
Usually there is not error bound (or we don't know how to proof them), so the worst case is that it is infinitely wrong (or as wrong as floating point numbers can express).
263.
by petschge 7y ago
Yes, I have done so successfully. As well as moved devices.
264.
by petschge 7y ago
When the magnetic field is non-calm that is probably due to a space weather event that is geo-effective and inducing large currents in the ground. The local magnetic field an then be significantly distorted depending on local conductivity.
265.
by petschge 7y ago
Turns out that this is true, but you need four COMPLEX numbers. Not that that would have been something that von Neumann would have scoffed at. Source: https://www.johndcook.com/blog/2011/06/21/how-to-fit
266.
by petschge 7y ago
In many many subject areas we already have that through the use of preprint servers such as Arxiv. No need to get rid of the upsides of peer review just to get that.
267.
by petschge 7y ago
I probably read about three full papers per week. The rest I skim similar to you.
268.
by petschge 7y ago
are you sure? wave drag is a big part of the total drag ob a ship. which is also why dolphins go pretty fast with much less than one horse power.
269.
by petschge 7y ago
Btw: The old system was the editor reading and reviewing all submissions himself. The new system of only a quick glance by the editor and then further scrutiny by a peer was instituted for two reasons: 1.) to many submissions for the editor
270.
by petschge 7y ago
That does not solve the problem that more pages take longer to read. Given the pace of science these days keeping up with papers just in your subfield is an actual problem.

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