The h Bar

Just to let you know how strict they are in other chats and how lucky you, therefore, are here. I was banned for 30 minutes for chatting because I posted a link to another Stack Overflow chat room.

Sir Cumference

Even if I didn't know better, I would civilly talk it out

No need for mods to involve themselves unless there's a problem, like an argument over it

ACuriousMind

@SirCumference Would it be clear to other users not knowing you two know each other?

Sir Cumference

> Even if I didn't know better, I would civilly talk it out. No need for mods to involve themselves unless there's a problem, like an argument over it.

ACuriousMind

If I need inside knowledge to decide whether a conversation is appropriate or not, chances are you should not hold that conversation in an SE chatroom.

3

Sir Cumference

In fact, it's a little irritating for everyone when mods assume posts to be offensive and immediately delete them.

@ACuriousMind As dictated by whom, for what reason?

ACuriousMind

12:24 AM

@SirCumference We don't delete them because we "assume they are offensive". We delete them because they are inappropriate for SE chat, regardless of actual offense taken.

ArtOfCode

@SirCumference That's a mod's job. It keeps SE pleasant. If you want to be the one dictating what is and isn't appropriate, SE chat is probably not a suitable platform for you.

Sir Cumference

@ACuriousMind Why are they inappropriate? I'm not trying to be rude, but I don't see how a message can be considered inappropriate if those involved in the conversation are cool with it.

@ArtOfCode Pleasant for whom, exactly? I guess the people who can't handle a joke?

Certainly not for the majority

ACuriousMind

@SirCumference Rudeness, in particular insults, are simply not okay. They are inappropriate because people lacking the context will just get the impression that this is a chat where people can insult each other.

Fawad

@SirCumference no. I learned few slang/abuse from you guys (at least 3) so yeah.

Sir Cumference

@ACuriousMind What? Under what grounds?

nbro

12:27 AM

@SirCumference I'm not "cool" with too many off-topic conversations. If that happens once in a while, that's ok, but in this chat it happens very often. I think there are many other places on the web where you can discuss freely. I simply don't understand why you're still coming here, if you want absolute freedom.

ArtOfCode

@SirCumference It's not about whether it's a joke or not. It's about the impression it gives to people who are unfamiliar with the site, or with chat, or with you.

Sir Cumference

Jeez, so many people

ACuriousMind

Even if no random passerby gets that impression, it creates a certain atmosphere where things are "just a joke" and it becomes difficult to draw the line to actual insults: If we don't act on insults meant as a joke, how could you expect us to act on actual insults where the user claims they were "just a joke"?

Sir Cumference

@nbro No one is asking for "absolute freedom". We don't want the ability to harass others or make them feel bad. But when we know some users can take a joke, we'd appreciate if a mod didn't come from left field and delete it.

@ACuriousMind Idea: if someone is offended, then you should get involved.

I don't see the point of interfering when the response is clearly jocular

Fawad

But who uses abuse in jokes? Learn how to joke properly

Sir Cumference

12:30 AM

@Fawad It's not "abuse". You need to be able to laugh at yourself.

ACuriousMind

@SirCumference Idea declined. I get involved when I see the need to get involved. Such as now.

Bernardo Meurer

This kick was 100% worth it

Sir Cumference

If someone can't and is offended, that warrants interference. But not when people are completely cool with it.

Bernardo Meurer

Everyone who read what I said knows it's true

ACuriousMind

@SirCumference No, it's perfectly fine to not be able to laugh at insults.

It's a valid opinion, and you don't get to tell someone else to "take a joke"

Fawad

12:31 AM

Don't kick @BernardoMeurer let him put his opinion

Sir Cumference

@ACuriousMind It's not an insult. He wasn't directing it at you, he was talking to me, whom he knows can handle such jokes.

nbro

@SirCumference But, believe me, I often frequent other chat rooms on the Stack Exchange community and they are a lot stricter regarding being off-topic, serious and respectful, and I think it should be like that, since the primary concern of these chat rooms, I believe, is to help in real-time people that really need help regarding the corresponding topics.

ArtOfCode

@SirCumference But it reads as an insult if you're even remotely unfamiliar with the situation. That's the point.

ACuriousMind

@Fawad I will let him voice his opinion when he can do it without being insulting to DavidZ or other mods.

Sir Cumference

@ArtOfCode Then it's not your conversation. Mind your own business, no one is talking to you.

ACuriousMind

12:32 AM

@SirCumference That is not how moderation works.

Sir Cumference

(not saying that to you, ArtOfCode, but as a general response)

Fawad

@SirCumference lol

ACuriousMind

As moderators, all conversations on the SE chat network are our business

If you want to have conversations that are not our business, have them somewhere else.

ArtOfCode

@SirCumference This is a public chatroom. Any conversation held here is public, and anyone can get involved.

Sir Cumference

@ArtOfCode That's like saying "this is a public planet. Let me involve myself in every conversation"

Fawad

12:33 AM

@ACuriousMind I bet go and moderate Chinese.se chat.

ArtOfCode

@SirCumference There's a very big difference between a website and a planet. Hyperbole won't help your argument.

Sir Cumference

There is no need for someone to insert themselves into conversations between different people.

0celouvskyopoulo7

Did @BernardoMeurer get banned?

Sir Cumference

@ArtOfCode Fine, public facility, public park, etc.

You can insert yourself into another person's conversation, but there's no need to.

ACuriousMind

@0celouvskyopoulo7 Just kicked from the room (for half an hour since it was the third kick in a short while)

Sir Cumference

12:35 AM

I'm not trying to sound rude, but it is a bit aggravating

nbro

@Fawad Btw, if I'm not wrong, users with >=10000 of reputation can see removed messages...

0celouvskyopoulo7

They cannot.

Fawad

@nbro I don't fear

ArtOfCode

@nbro Room owners and moderators can, I don't think 10k users can.

Fawad

Only mods can see.

Sir Cumference

12:37 AM

@ArtOfCode Not to mention, if you swear in a public facility, more often than not those nearby will have to deal with it.

ACuriousMind

@nbro On chat, only moderators can see deleted messages

nbro

Ok

Sir Cumference

Please, @ACuriousMind and @DavidZ, just consider being more lenient and remember the context before deleting posts

ACuriousMind

@SirCumference Let's not play silly analogy time, here. Whatever SE chat is analogous to, you may not insult other users, even in jest, and that's the end of it.

ArtOfCode

@SirCumference but this is less like a public facility, and more like a staffed event venue, where the event staff will tell you to cool it if you sound like you're insulting people

Sir Cumference

12:39 AM

Whatever. I don't get your mindset, much like 75% of the people.

I've seen no evidence that a significant percentage of SE users are hyper-offended by such jokes, but if you insist that your methods are correct, I can't change your minset

David Z

@SirCumference That's okay in the sense that not getting the mindset is fine, but posting inappropriate chat messages isn't. Our goal is just to keep people from posting inappropriate stuff.

(sorry I have to run, I'll be back to check in on this later)

Sir Cumference

@DavidZ I've yet to see a valid purpose to this goal.

nbro

@SirCumference There are a lot of valid purposes and, if you're not understanding them now, you will hopefully in the future.

Sir Cumference

Because someone else may be offended at a post not directed to them? Because some guy might get the idea that harassing others is okay, just because he saw people swearing in a clearly jocular context?

ArtOfCode

@SirCumference Even if you can't see a purpose to it, it doesn't need to have a purpose. That's the network's policy. You are on the network, and therefore should abide by it.

Sir Cumference

12:44 AM

@ArtOfCode Ah, when you put it that way, it makes complete sense.

Sigh

ACuriousMind

@SirCumference The purpose is to keep the atmosphere friendly and welcoming. The purpose is to not even begin to let users insult others under the guise of joking (I'm not accusing anyone here of that, but the slippery slope is there). The purpose is to make chat a place where gratitious rudeness is not accepted, even in jest.

ArtOfCode

End of the day, SE sets policy. Users abide by it. Moderators enforce it. That's how SE works, whatever anyone in particular thinks of it. There's no other realistic way to do it.

Sir Cumference

@ACuriousMind Question, have you had a friend jokingly swear to you?

0celouvskyopoulo7

@ACuriousMind For what it's worth, I agree with you.

Let the record show I told him it was inappropriate.

ACuriousMind

@SirCumference Sure. I've heard (and laughed about) lots of things in private and from friends that I wouldn't dream typing in here to another user.

Sir Cumference

12:47 AM

@ACuriousMind Right. Did you insist that those people were being unfriendly?

ACuriousMind

This is not a private conversation and you're not just talking to your friends, so you should not talk in here like you talk in private with people you understand well.

Sir Cumference

All right, I give up

This isn't getting anywhere

Fawad

@SirCumference :( never give up

Sir Cumference

@ACuriousMind Though, I do have to ask. At what point does "troll" become an insult?

Fawad

@ACuriousMind ^

ACuriousMind

12:52 AM

@SirCumference When you use it to insult another person?

It's always been something that's on the line - it has both legitimate and insulting uses

Sir Cumference

@ACuriousMind No, as in, I've used it to describe a user's actions when they fed me false information about physics, and they agreed to it

ACuriousMind

(in the case where it is both legitimate and insulting it's still better to err on the side of finding a better way to express oneself)

Sir Cumference

Suddenly, my message got removed

Even the person I was describing was confused

Right, it was here

nbro

@SirCumference The moderators of this chat room are being very patient with you!

ACuriousMind

@SirCumference Yeah, so, what do you want me to say about that?

Sir Cumference

12:56 AM

@nbro I haven't said anything rude. Just voiced my opinion.

@ACuriousMind Is "troll" offensive?

ACuriousMind

If used as in "you troll" it is an insult, though definitely on the milder end of the spectrum.

Sir Cumference

K good

Fawad

Let me know if this is troll or insult

ACuriousMind

@Fawad Is that directed at the users here? Why did you post that?

Fawad

@ACuriousMind 1 yes. 2 to know what troll level is accepted

ACuriousMind

1:00 AM

If you want to play twenty questions about whether or not specific things are off-limits or not, I won't do that.

Bernardo Meurer

@ACuriousMind You kicking me doesn't make it less truth :)

Fawad

@ACuriousMind I don't have 20 questions. Your act of deleting that message without my permission is insulting me!!!!

Bernardo Meurer

@Fawad He doesn't care

Fawad

Sad but true :(

ArtOfCode

@Fawad Please don't start.

Fawad

1:05 AM

@ArtOfCode Can I know why he deleted my message? I wanted to know what troll level is accepted here. And deleting without my permission has insulted me /cc @ACuriousMind

ArtOfCode

@Fawad because it was a pointless attempt at trolling that was only going to make things worse

ACM is a moderator, he doesn't need your permission to delete a message.

0celouvskyopoulo7

@ACuriousMind Did...he really get suspended for 12 hours?

ACuriousMind

@Fawad 1. I deleted it because you admitted it was directed at the users of this chat room, effectively calling them stupid. 2. When you post anything on SE you grant implicit permission for it to be deleted by the users who have deletion privileges, there is no need (or indeed option) for you to grant it.

ArtOfCode

@0celouvskyopoulo7 Yes.

0celouvskyopoulo7

Why is there so much drama tonight?

@ArtOfCode how can I speed up my simulation

I don't think it's using my computer to its fullest capacity

Fawad

1:10 AM

@ACuriousMind for how many more years you are at mod position?

ArtOfCode

@0celouvskyopoulo7 what simulation?

@Fawad moderator terms aren't timed.

0celouvskyopoulo7

It's only using 30% of one core

@ArtOfCode radiation damage simulation

@ACuriousMind Did you see my note on parallel fields from earlier?

It's indeed a global phenomenon, quite interesting.

ArtOfCode

would need to know more about what you're doing/using

0celouvskyopoulo7

@ArtOfCode the usual: srim.org

Sir Cumference

@Fawad Damn, dude

Chill

0celouvskyopoulo7

1:12 AM

It's a Christmas tree simulation

ArtOfCode

@0celouvskyopoulo7 unless that software gives you an option to speed up the simulation... you can't

it'd be possible if you were using your own code, probably

ACuriousMind

@0celouvskyopoulo7 I saw the bit about them being everywhere linearly independent if they are at one point, that makes sense and doesn't contradict what we said before, does it? Anyway, I'm gonna drop out to bed soon.

0celouvskyopoulo7

@ACuriousMind Well, it means that it's not possible for them to be "equal on some region"

If two parallel fields agree at one point they agree at every point

heather

2:22 AM

wait, wait, i'm sorry: @ACuriousMind, reading through the above conversation, I'd just like to point out that I'm a kid and I've seen Bernardo's conversations and never felt made uncomfortable by them. There are kids at my school more foul-mouthed than anyone in this chatroom. I can't say I understand why what he says on occasion is a problem, especially when I see people not Bernardo saying just as inflammatory (if not more so) things and not getting banned.

(just a comment to ACuriousMind, not to restart an argument, i'm just curious to see what he says.)

Kenshin

Sup Heather

Fawad

@heather they don't care.

Kenshin

seems i missed all the drama, the good stuff

Did Bernardo get banned or something?

hi @DavidZ lnog time no see

do you get an alert when someone says the word banned or something?

David Z

@heather Well I'm not ACM but it was kind of the point that it doesn't matter whether anyone present is actually offended. Or, to be more precise, the fact that nobody present was offended, if that is the case, doesn't make something okay to post here in chat.

heather

@DavidZ, thanks, I have to go now, sorry (have to go take down the trash)

i'll probably be asking about this more later =)

Kenshin

2:34 AM

@DavidZ was anyone banned, or were they just warned for inappropraite behaviour

David Z

There are no bans in chat. But more to the point, I'm not going to discuss suspensions at this time.

Kenshin

There are bans in chat sometimes

David Z

To put it more directly, "ban" is not used as a label for anything that can be done in chat.

Kenshin

ohk

David Z

There are suspensions and kick-mutes, and there used to be plain old kicks but I'm not sure that exists anymore

Kenshin

2:37 AM

yeah I because I remember once seeing a user here who apparantly couldn't sepak

I found it a bit odd because there was no indication he couldn't speak (other than the gossip)

and so some ppl may have thought he was just ignoring everyone

Secret

0

Q: Refuting an alternative claim to relativistic energy

In relativity, the $E=\gamma mc^{2}$ formula tells us that as an object goes into higher and higher velocities, more input energy is needed for the same increase in velocity. An alternative claim one can make is this: as an object goes into higher and higher velocities, the object becomes less ...

That's an interesting question...but if that's the case, then we will expect under such model photons will not even be able to transfer energy to other objects at all, yet they do.

Restricting this model to only massive objects then it becomes hard to debunk

Kenshin

@DavidZ how is the job hunting going?

David Z

@Kenshin Yeah, that is a somewhat badly designed part of the chat interface, as far as I know.

@Kenshin not well

Kenshin

sorry to hear that

r u still in physics or just searching

David Z

which is probably no better/worse than I should expect

Kenshin

2:40 AM

why is that?

David Z

It's just really hard to get a job (unless you stand out in some way that somebody values)

Kenshin

yeah that's true

Secret

To be checked: Increase in transparency to (insert word) as a function of velocity approaching the speed of light

Kenshin

is it your first industry job?

that's usually the hardest

David Z

Yeah, I mean, the lack of industry experience definitely isn't helping

Kenshin

2:42 AM

do you use your SE account on your resume, cos that's pretty impressive

oh well, keep at it I'm sure you'll find something

David Z

It would depend on what I'm applying for, but typically yeah, it would get a brief mention at the bottom

@Kenshin hopefully before too long ;-) thanks for the optimism

Secret

The interesting thing about that question is that the alternate model to be debunked is basically claiming that the transparency of the object in terms of energy absorption increases with velocity. I am not sure if we have already ruled out the existence of such velocity dependent transparancy of relativistic massive particles

Kenshin

np all the best, laterz

David Z

@Kenshin same to you

@Secret there could be something to that, in the sense that cross sections generally decrease with energy

but I don't think that's what the question is getting at

Secret

Well the OP mentioned how as the object moves faster it absorbs less and less energy that get inputted to it which drivens its accelerated motion, which is why I have this impression that it sort of becoming more and more transparent to any further energy being inputted to the system to accelerate it

using the OP's reasoning, at the limit of c, the object basically became transparent thus any energy ( say in the form of photons, or other particles) that is delivered to it to accelerate it further just pass straight through the object as if it is empty space

David Z

2:50 AM

Yeah, the asker of that question (or whoever is advancing that theory) may have similar ideas. I think it's not quite clear though. I would think that either the question is about something far removed from mainstream physics (and should be closed as such), or it's very badly described.

Secret

Agreed.

Still that question makes me curious on how our experiment findings on massive particles have debunked this "transparancy model" (especially now that you mentioend how interaction cross sections in general decrease with increase in energy). I suspect we get the lorentz transformation as explanation of this cutoff in the acceleration from another experiment. Uh I think I need to revise my SR...

If my background is sufficient, from what I knew, the constancy of the speed of light is not sufficient to distinguish the SR model of lorentz transformations vs this "transparancy model" as the explanation of an upper bound in the velocity of a massive object

so something else from the SR postulates and experiments are needed...I wonder, whether this "transparancy model" actually violates the 1st postulate, that physics remains the same in all inertial reference frames...

David Z

The thing is I'm not sure we even have debunked this "transparency model" - it's impossible to say without a more precise definition of the model.

Secret

Yeah, I think if this thing is actually something from a theoretical paper, then it can be dug up to check its math formulation and see if it recovers the SR outcomes

though the way the question is asked sounds like either an alternate theory without precise definition (yet?) or a genuine curioisity idea simialr to those asked by undergrads

either way, unless the OP can give us a published reputable journal source (hence mainstream), this is going to be closed as offtopic as you suggested

Secret

3:07 AM

One reasons I found questions like these interesting is that they are the types that ask about how experiments distinguish between model A and model B. If both models are mainstream, answers to these questions give future readers more ideas on how the experiment interplay with the theory in order to select the best model out of a bunch of similar models for a given phenomenon,
and thus providing them more experimental intuition on how we actually build our understanding and how we decide what is mainstream

However asking good questions of this type is tricky especially if model B is not mainstream

Secret

0

Q: Temporal delay between entangled photon pair

When generating entangled photons by means of Spontaneous Parametric Down-Conversion SPDC, the usual assumption is that the two photons are created at the same time. I have not been able to find any papers which discuss this assumption, nor experimental papers in which the delay has been measure...

quantum-mechanics photons entanglement

These are also interesting questions as often when doing fundemental investigations, assumptions need to be checked. Askers of these questions often have enough experience to provide insights on an aspect of an experiment that is often overlooked for example

Bottom line: Experiment related PSE tend to caught my attention recently due to a heightened interest of me to learn more about the experiment side of the experiment-theory interplay in physics

David Z

@Secret Well, a published reputable source would help, and that probably is the best way to go about improving the question. But I could see the question becoming on topic even without that, if the model is made precise.

Secret

Noted. I have just added my comments in the PSE as suggested, Let me know if I can formulate my comment better

David Z

@Secret that's true, though in this case I think a difference between "mainstream" and "correct" becomes relevant. A theory or a body of work can be mainstream even if it's not correct; there just has to be universal agreement about its correctness or incorrectness. To take another example, people should still be able to ask questions about the luminiferous aether theory. It's been thoroughly debunked, but as long as the question is fully aware of that, it could very well be reasonable.

@Secret Good enough I think. I've closed the question for now. I'll also leave a comment to add the "weight" of my diamond (whatever that's worth) and to encourage the OP to reformulate it.

Slereah

7:01 AM

Hello

user228700

Hello :-P

John Rennie

Morning

user228700

@JohnRennie Hi :-)

John Rennie

Hi :-)

user228700

How goes it?

John Rennie

7:16 AM

Fairly standard Wednesday morning. Nothing has gone wrong at work. Enjoyed my morning coffee. All very routine.

user228700

Quite busy, I see...

user228700

@JohnRennie Wokay :-)

John Rennie

And you?

user228700

I had my exam today...

John Rennie

So I believe ...

user228700

7:17 AM

You're being weird :-|

John Rennie

No, I'm avoiding asking you how it went in case it's something you don't want to talk about!

user228700

@JohnRennie :-) That's very considerate of you, thanks. Yeah, no, I don't want to talk about it or anything. It went OK. Might not get in though.

John Rennie

Ah, OK. Well, wait and see I guess.

Anyhow, how does it feel to have a life again? :-)

user228700

@JohnRennie ...sort of numb. Like I had predicted before, I'm at a loss for something to do.

user228700

I could have lunch but then what?

John Rennie

7:20 AM

Numb is exactly how I felt after my finals.

It's such a big change that you don't really know how to deal with it.

@Kaumudi.H being me, I would be planning the mother of all lunches!

user228700

@JohnRennie Yes. And I think I would've felt happier had I gotten into the college I actually wanted to but I didn't and I just sort of feel numb in the worst way possible. Sorry if that was TMI :-/

user228700

@JohnRennie Ah, but my mum's already prepared lunch. Rice and sambaar as always :-/

John Rennie

@Kaumudi.H there is always another lunch tomorrow!

Well, apart from the day you drop dead, though in that case you won't be worried because you'll be dead! :-)

user228700

@JohnRennie ...which will also most likely be the same. I, yeah, I should probably not hang out here till I get better 'cause it will be the same kind crap from me :-/

John Rennie

If you're feeling kind of down then go with it - that's an entirely reasonable reaction to a stressful experience.

user228700

7:25 AM

go with it. Where? I really don't know what to do with myself. I thought I'd go to the library but nah, I don't feel like doing anything. Not even sleeping or eating or just laying down. Nothing at all.

John Rennie

Go for a walk.

That's my standard solution when I'm in a funk.

Or a cycle ride.

Anything that is low level exercise and doesn't tax the brain too much.

user228700

OK. I'll have my lunch and ride my cycle to the library. Just kind of force myself to, even if I don't feel like it. Maybe I'll feel better...

John Rennie

It's worth a try. Gentle exercise produces endorphins that are a natural high.

user228700

Ah, but you know what the problem is? When I come back, it'll be the same again :-/

user228700

Anyhoo, I'll leave u be :-P

John Rennie

7:30 AM

Try it anyway.

@Kaumudi.H I'm around all morning if you want to chat here or on that G thingy

user228700

G thingy x'D

user228700

@JohnRennie Unless you're in the mood to chat with a relatively depressed 18 yo person, I'd advise you against it :-P

John Rennie

@Kaumudi.H I'm not overburdened with things to do right now. If you want to chat I'm around.

The alternative is writing a report that I've successfully been putting off for two weeks now :-)

user228700

@JohnRennie Haha x'D Hmm, I could stand to ask about something. Shall I shoot you a message on gchat, then?

John Rennie

Go ahead. I'll try and remember how it works ...

Slereah

7:40 AM

@0celouvskyopoulo7 Riddle me this : how many non-homeomorphic quotient manifolds of Minkowski space are there in dimension $n$

Slereah

7:51 AM

2 dimension has minkowski space, the timelike cylinder, spacelike cylinder, torus, timelike Klein bottle, spacelike Klein bottle

I'm not sure if there's something with identification along null curves

yuggib

8:09 AM

@Slereah these classification problems sound like the bread and butter of geometers

they should know the answer

I don't (for I despise geometry...)

Slereah

Well I don't think it's that hard for Minkowski space

It's gonna be just identifications, twisted or not, along hypersurfaces

yuggib

is it easy for euclidean space?

and what do you mean by quotient manifold?

Slereah

$M / \Gamma$

For $\Gamma$ some discrete group on Minkowski space

Such that the quotient is still a manifold

I think that's only $\Bbb Z$ for Minkowski space

Group acting freely or whatever the math talk is

yuggib

yeah act freely and compact

Mithrandir24601

@Secret I'm probably missing something obvious, but what's PSE?

Slereah

8:22 AM

Physics Stack Exchange

The place we're in

Mithrandir24601

... I feel like an idiot. Not least, because last time I asked someone what an acronym is, it was also the name of that SE site. Bother. Now I really feel like an idiot, as I use 'SE' all the time... :/

yuggib

Acronyms are evil (AAE)

Slereah

Hm, I see why you need the coupling constant $\lambda$ for linearized gravity

Otherwise you have to consider the size of the metric components and the size of the derivatives separately

Secret

8:38 AM

@Mithrandir24601 It also does not help that I actually use that abbreviation as an abbreviation of "physics stack exchange questions"

In general (letter)SE is (long form of said letter) stack exchange

and I tend to use that as short for (long form of said letter) stack exchange questions

Qmechanic

1

Q: Perceiving and formulating

My question may feel very absurd to few readers but bear with me. I have studied physics for almost 5 years now, since its first introduction to us at school level. What really baffles me sometimes is that why have the formulas being constructed the way they are. Why are the dimensions (like mass...

classical-mechanics universe classical-electrodynamics classical-field-theory

Too broad? Primarily opinion-based?

Slereah

PSE could be the philosophy stackexchange

or the parenting stackexchange

Or the pet stackexchange

Secret

That's where you need the first two letters in some cases to disambigurate them

e.g. Philosophy will be PhSE

Mithrandir24601

That could still be Physics though

Slereah

53

Q: 12 year old boy is totally out of control

My seventh grader screamed "Fuck you" at me last night. I am at the end of my rope. His behavior is so bad I feel like I need to send him away to a boarding school or something because he is causing so much disturbance in our house and so much stress to me, it's making me hate parenthood. We have...

behavior pre-teen conflict

Oh no

Smack his ass

Secret

8:41 AM

but that's just me, there are no official acronyms afaik except mathematics chemistry and physics (and possibly more big SE sites I forgot)

Mithrandir24601

Using PSE as physics stack exchange on this chat makes perfect sense, that's the problem - it's so obvious

I've heard SO before

Secret

You sometimes see me and others use MSE in the maths chat

and kaumudi like to use CSE for chemistry stack exchange (as computer science SE is rarely involved)

Mithrandir24601

Makes sense - I've never heard one for Computer Science. A proposed one for Security was Sec.SE - don't know if it's the 'official' one or not, but all the sites seem to have one that they use

Slereah

@Mithrandir24601 Pronounced sexy?

Mithrandir24601

Don't actually know - it was on their list of memes - security.meta.stackexchange.com/q/880/147587

yuggib

8:45 AM

@Qmechanic unclear what you're asking?

he is mostly expressing a feeling

ACuriousMind

"I'm voting to close this question because it is expressing feelings."? :D

yuggib

:D

you're not allowed to feel in physics stackexchange

Secret

My personal preferences are as follows:
Physics PSE
Chemistry CSE
Maths MSE
Biology BSE or BioSE
Philosophy PhSE
Worldbuilding WSE
Scifi and fantasy ScifiSE
Math Overflow MO
Stack Overflow SO
Academia AcaSE
Meta Meta
Astronomy AstroSE

However for anything beneath stack overflow, I rarely used thus I do not really adhere strongly to my own preference

In general, I can sometimes get confused myself without a notebook since I have a tendency to change my preference and acronyms on the fly for no apparent reason

Slereah

My answer on gravitational waves has some success

Qmechanic

@yuggib : Please vote to close (VTC) as you think is best.

Slereah

8:50 AM

The sweet moment where you get to use some obscure paper

Mithrandir24601

Fair enough - makes sense, although I tend to use WB for Worldbuilding and SFF for sci-fi and fantasy

Slereah

I'm not even sure where I found it

I think it was on some paper on photon-graviton vertex

yuggib

@Qmechanic I went for unclear

Qmechanic

@yuggib : Reminds me of a John Malkovich quote from Knockaround Guys: Now everyone's feelings are involved. :)

yuggib

@Qmechanic :-)

Slereah

9:27 AM

projecteuclid.org/download/pdf_1/euclid.mmj/1029002964

Why is the Euler characteristic not present at all in this paper on the Gauss Bonnet theorem

Physics Meta

0

Q: A slight confusion in resubmitting of a closed question [a genuine attempt to re-word the original]

I asked a question, but it was declared a duplicate of this, this and this, but none of them answered what I originally had in mind. [probably my mistake, the question must have been poorly worded]. I edited but to no avail. So I decided to ask an altogether different question, but unfortunately ...

discussion

user129412

Stupid question. I'm modeling a semiconductor nanowire with some metalic gates on top of it. I'm trying to calculate the capacitance of those gates w.r.t. the nanowire. But as it is a nanowire I can't just treat it as a bulk object, the surface also matters. So what I do is I calculate the total number of charges Q_B in the bulk, and Q_S on the surface, for two values of gate voltage, and use C_{B,S} = dQ_{B,S}/dV for an approximation. This works quite well.

But to find C_tot, do I then just add C_B + C_S, or should I add absolute values? Because they are sometimes opposite signs.

Slereah

9:42 AM

Apparently for a $k$-sheeted covering space, you have $\chi(\bar M) = k \chi(M)$

Does that mean any quotient manifold by $\Bbb Z$ has euler characteristic $0$, and so does the original space?

Transcript for