Leaving capital Upsilons there in lieu of lower-case gamma!?! I mean, I know a lot of people don't make differentials \mathrm and stuff like that, but ...
@dmckee If an edit does not address all problems with the post (but is nevertheless an improvement), but we as reviewers do, for whatever reason, not have the inclination to fix that - should we approve the partial edit or skip the review?
@ACuriousMind Hmmm ... I don't know what the official policy is. Certainly that post is a fair amount of work to fix and for a post that is likely to remain closed, so I can see not wanting to dive in.
My major concern is that I don't want low-rep editors getting the idea that doing so minimal a job is consistent with with our expectations, so I'd even consider rejecting it.
Too minor is gone, official policy seems to be to approve/improve partial edits
And Shog's response to my mother meta request to word the rejection message in a friendlier way seems to indicate that rejecting an edit is considered a "hostile action" that should only be taken if the edit is actually totally worthless.
I asked at:
Sum of energy from torques of several disks in double rotation
It is on hold, but I don't find another forum or question where this problem is resolved. It's possible to use lower number of disks, 16 at least, but I can't think with 2 or 3 disks.
@VatsalManot The question is unclear - the potential difference between which two points? What does the circuit consist of, and the resistance of which part do you increase?
You are still not precise. A potential difference is between two points (or at/over an element of the circuit). But yes, if you increase the resistance of a resistor connected to a battery, the current through it will decrease (and the voltage drop at the resistor will stay at 12V, since a battery provides constant voltage supply).
This post is my best effort to seek assistance on a topic which is quite vague to me, so that I am struggling to formulate my questions. I hope that someone will be able to figure out what it is I'm trying to articulate.
If we have a circuit with a resistor, we speak of the voltage drop across t...
If the potential difference is constant throughout the circuit, and the only thing that the resistors affect is the rate of flow of charge (current), then wouldn't "current drop" be a more apt description?
On a completely unrelated (yet relevant) topic, iTunes U makes for a very good educational resource.
I'm looking for online courses "video" for Classical electrodynamics and nuclear physics for undergraduate students ..
do you know where I can find it ?
@New_new_newbie I think it falls under the same policy as all resource recommendations.
And with that in mind, I think, as currently written, it is not a good resource recommendation question, but I don't really know if it deserves to be closed for that.
Thanks. In your link, there is one string that says:
"Resource recommendations must ask for descriptive answers. It's not enough to ask for a list of books that cover topic X — a simple Amazon search can provide that."
Great, I'm passing the baton to you, plus I think I already have drawn attention to this, so I'm leaving this without an official flag. I'm sure either of @DavidZ, dmckee etc. will see this and do the needful. Thanks @ACuriousMind :)
@ACuriousMind If you know that it is a copy & paste answer, then edit it the link in & ask for an explanation (assuming there isn't one to go along with it)
@KyleKanos I know it is copy-paste because someone else edited in the attribution link (the copy-paster didn't even remove the signature of the original poster, and hell if I know how the editor found that post).
To answer your question directly, there is no automatic plagiarism detection (as far as I know). Generally we rely on alert users to notice when something appears to be copied and pasted from another source. If you see something that you suspect might be plagiarized and you'd like to do something...
Can anyone recommend a tensor package for GR in Mathematica? Ideally, easy to use and fast. (I tried 'GREAT' but it's taken over 30 minutes and it still isn't done.)
(Note: I'm working with large metrics, in D=26 dimensions.)
Has anybody used tensors in Mathematica? How to properly work with them?
I find Mathematica not very friendly in this field, as I am defining my own functions for lowering & raising indices, multiplication and stuff like that.
I was wondering if there is some good package or a secret way to use t...
@dmckee I disagree that this is a problem we need to be worried about. It's come up before, but I remain convinced that some improvement > no improvement
@KyleKanos Disturbingly political tone near the end of that.
@picaposo Depends on what you're trying to do research in. Germany is good for math.phys., I think Holland's pretty good for cosmo/HEP stuff these days (also the quantum gravity group at the UvA is nice, although I'm biased :P)
@Danu I'm current at RUG and they have a THEP research group as well. I don't really know where I'm heading (I'm still doing my BSc). I mostly asked this question to figure out what is generally required to get into a Masters of Ph.D program for THEP. Do you think an 8.0 is a safe overall grade or do you need a 9.0 or above to be competitive for such a program?
@KyleKanos and others, regarding plagiarism: we've kind of shifted from deleting plagiarized content outright to just quoting it and linking to the source, in many cases. So I wonder if that meta post should be updated.
@DavidZ It says: Do not copy the complete text of external sources, which was done in the case we were talking about, even with signature of the original author - do we delete such posts, or would we cut down the quote and link? Also, it wasn't a particularly good source/quote, either.
@ACuriousMind well, plagiarized posts can be deleted. I'm not saying it was mishandled, I just want to make sure the policy is consistent for the future. Evidently we have some things to work out.
I think "Do not copy the complete text of external sources" is really meant to say that an answer consisting of nothing but a quote is frowned upon, but I would consider that a "soft" rule.
@ACuriousMind Actually, I've already discovered the mechanism at work here
We have no time to do the things we would usually keep ourselves busy with (mainly writing answers and/or reading interesting questions/answers)
So I (and you, too, apparently) find myself just grinding through the review queue instead, because it is easy to do in a minute or two without distracting from other work all too much
I had one lecture where the two lecturers switched with each other each week - one would give the lecture, while the other would sit in the front row and provide "commentary"
The first Tuesday of the semester, 8 AM at Siedentop's Mathematical Quantum Mechanics. In the first row, a 70+ bald guy is sitting. Once the lecture starts, he straight up whips out a pair of god damn binoculars to view the blackboard
So halfway through the lecture, Siedentop has outlined the standard setup in QM: Start with the Hilbert space $L^2$, and restrict your operators to appropriate domains in order to prove interesting things.
The guy speaks up: 'You seem to be getting things completely the wrong way around. The way to do quantum mechanics is not to start from Hilbert space, but to consider the operator algebra.'
Siedentop: 'I understand that the $C^\star$-algebra perspective is very nice and important, but this is how the physicists insist on doing QM.'
That's true... When Strings 2012 was held at LMU some guy verbally assaulted Witten after his talk! It's this high school teacher guy (from Munich) who writes (popular) books on how 'particle physicists are all misguided' yadayada. He's apparently quite well-known. Anyhow, I'll call it a night. Bye!
I asked at:
Sum of energy from torques of several disks in double rotation
It is on hold, but I don't find another forum or question where this problem is resolved. It's possible to use lower number of disks, 16 at least, but I can't think with 2 or 3 disks.
I'm looking for online courses "video" for Classical electrodynamics and nuclear physics for undergraduate students ..
do you know where I can find it ?
