Recent content by hamster143
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Graduate What can the rest frame of a neutrino possibly mean?
The concept of trajectory becomes fuzzy, but nevertheless valid to some extent. An analogy would be a trajectory of a short pulse of light in space, or of a ripple in a lake.- hamster143
- Post #2
- Forum: Special and General Relativity
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Graduate CERN team claims measurement of neutrino speed >c
This is logical, but wrong. :) OPERA is not exactly "underground" (as in, "in an abandoned mine".) It sits just off a 10-km highway tunnel through the mountain. They took two GPS units and measured locations of both ends of the tunnel, and then tracked back from the entrances to the facility to...- hamster143
- Post #150
- Forum: Special and General Relativity
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Graduate MTW 25.29 v.s. 25.38 (first formula)
I don't have access to the part of MTW that derives 25.38, but, if I understand your concern correctly, I'm not sure that anything is wrong. The escape velocity is a critical point. Consider that, in the Newtonian case, infall time for an observer starting at the distance R and velocity...- hamster143
- Post #3
- Forum: Special and General Relativity
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Graduate CERN team claims measurement of neutrino speed >c
What bothers me most about this result is not so much the claim of v > c, as the magnitude of the effect. It is way, way too strong. It is incompatible with QG-inspired Lorentz-violating dispersion relations (it's too strong, by something like 13 orders of magnitude, compared to what we'd...- hamster143
- Post #145
- Forum: Special and General Relativity
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Graduate CERN team claims measurement of neutrino speed >c
Neutrinos come in multiple mass eigenstates. Strictly speaking, all we know is that _some_ SN 1987A neutrinos arrived within hours of the flash of light. The Lorentz-violating eigenstate could have arrived during the Middle Ages, for all we know. Or arrived two years in advance, but dispersed...- hamster143
- Post #141
- Forum: Special and General Relativity
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Unemployment rate vs deficit spending
He is wrong because he posits causality in one direction, when in actuality the causality goes in the opposite direction.- hamster143
- Post #19
- Forum: General Discussion
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Unemployment rate vs deficit spending
And we're trying to explain to him that he's wrong.- hamster143
- Post #17
- Forum: General Discussion
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Unemployment rate vs deficit spending
Here's your causation. Federal spending comes in two major categories, discretionary and mandatory. Discretionary spending (e.g. deciding to spend extra $5 billion on the space shuttle program, or to save $5 billion by shutting down Tevatron) does not vary much (except when the government...- hamster143
- Post #15
- Forum: General Discussion
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Graduate CP violation explained by Kerr metric
The paper is very vague and the news article only makes it worse. It seems to me that there are three essential claims: - General relativity as we know it is grossly incomplete and the Einstein equation should be modified to include terms which fail to be conserved under P and T. We just...- hamster143
- Post #3
- Forum: Beyond the Standard Models
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Undergrad Is √N Always Irrational for Non-Square Integers?
It depends on what you're allowed to use. But the simplest way would be to use the fundamental theorem of arithmetic (that every integer has a unique prime factorization). For any N, if sqrt(N) is rational, you can write that as N=A^2/B^2 and therefore B^2 N = A^2 and it's not hard to get...- hamster143
- Post #2
- Forum: Linear and Abstract Algebra
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What could be causing a file from 2011 to be undeletable?
The OP stated that the file is located in the temp folder and that he was unable to delete it in safe mode. That's a strong indication that the file is not in use.- hamster143
- Post #38
- Forum: Computing and Technology
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What could be causing a file from 2011 to be undeletable?
You can download a bootable USB drive with Linux on it from ubuntu.org.- hamster143
- Post #36
- Forum: Computing and Technology
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What could be causing a file from 2011 to be undeletable?
Registry has absolutely nothing to do with it. If the file is not in use, but you still can't delete it or even access its properties, something must be wrong with the file system. It does not matter what software you use, as long as the file system is OK. If you expect to see two different...- hamster143
- Post #35
- Forum: Computing and Technology
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What could be causing a file from 2011 to be undeletable?
The Linux method may work as far as it will remove the file, but you're just asking for more problems down the road. The underlying issue is, evidently, the filesystem corruption, and that's what you have to fix in order to delete the file properly. Going in with a third-party filesystem driver...- hamster143
- Post #32
- Forum: Computing and Technology
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What could be causing a file from 2011 to be undeletable?
Scan the disk for errors.- hamster143
- Post #21
- Forum: Computing and Technology