The h Bar

obe

5:01 PM

@0celo7 Are you already at university?

0celo7

have you people never heard of texting...

ACuriousMind

@obe lol, I asked the same thing yesterday

0celo7

@ACuriousMind when I was in Germany, in middle school, we didn't really have a word for texting because no one had phones

obe

@0celo7 What is texting?

0celo7

Was is just "SMS"?

Kyle Kanos

5:03 PM

Texting:

ACuriousMind

@0celo7 Oddly enough, we just call it schreiben, I think, without specifying that the "writing" is texting, and not with pens or something.

obe

@KyleKanos urbandictionary.com/define.php?term=texting

ACuriousMind

"SMSen" was used by some, but I haven't heard it in quite a time, especially since one rarely writes actual SMS nowadays.

obe

Texting is a lowlife thing to do.

0celo7

1. Rachel: hey hoe whats crackin'?

Cheryl: hey slut i'm just texting like 400 different people at the same time.

rofl

Magnus Wolffelt

5:05 PM

I think I need some help with my understanding of galaxy rotation curves.. is this the appropriate chat for that?

0celo7

@obe not really

ACuriousMind

@MagnusWolffelt In principle, yes. Though I'm not sure someone is around right now who's expertise that is.

That's not your type of astrology, is it @KyleKanos?

HDE 226868

The Observatory (Astronomy) isn't usually busy, so this might be your best choice.

0celo7

In principle this is a vidya chat

sometimes we talk about physics

mostly we don't

obe

@0celo7 It used to be a nakahara exercise chat.

I liked it better then.

Kyle Kanos

5:07 PM

@MagnusWolffelt What do you need to understand?

0celo7

@obe it could be a Straumann chat but ACM is busy making salad

Magnus Wolffelt

well I think my question is pretty basic.. as I understand wikipedia, stars in galaxies are, at "high altitude" moving much faster than expected, without escaping the galaxy.. correct?

Kyle Kanos

Not high altitude, further out radially

Magnus Wolffelt

well yes, that's what I mean

0celo7

@ACuriousMind That Skyrim total conversion looks sufficiently awesome that I might consider a clean install to play it when it comes out.

RIP framerate, it looks a lot busier than the vanilla game.

Gonna lock at 30 ::sigh::.

Kyle Kanos

5:10 PM

@MagnusWolffelt But yes, they're moving around a 200 km/s at further distances, it takes about 500 km/s to escape the galaxy.

Magnus Wolffelt

@KyleKanos and, and this is where I get confused... are the inner stars also moving faster than expected, or do they fit as expected with normal newtonian gravity from visible mass?

0celo7

@ACuriousMind Sold.

Desert Skyrim yes pls.

Kyle Kanos

@MagnusWolffelt No, they fit expected gravitational velocities

HDE 226868

Magnus Wolffelt

right.. so.. this can be explained by dark matter? but would this dark matter not also affect the velocity of the inner stars, making them also not move as expected?

Kyle Kanos

5:14 PM

Dominance of the respective gravitational potentials

cf, my answer here: physics.stackexchange.com/questions/68955/…

Magnus Wolffelt

aaah that question seems very relevant :)

didn't see it before

thanks

Kyle Kanos

(though that question can help elucidate the whole matter)

No problem

Magnus Wolffelt

very cool.. "In short, the reason dark matter maintains the (nearly) constant velocity curve is due to its linear dependence on radius, whereas the others fall off as 1/r."

other quick question: do discs (as opposed to spheres) form due to non-gravitational interaction?

Slereah

the best thing about dark matter is that Zwicky, the discoverer, looks like a giant prick

Kyle Kanos

Discs usually form due to conservation of angular momentum

Slereah

5:20 PM

obe

@MagnusWolffelt Your question had nothing to do specifically with galaxy rotation curves.

HDE 226868

@obe It kinda did.

obe

@HDE226868 Link to the direct reference to a rotation curve.

Kyle Kanos

@Slereah He was a prick

HDE 226868

@obe It was partially about why the observed vs. no dark matter curves line up for low values of $r$ but diverge for high values of $r$.

Kyle Kanos

5:23 PM

He kicked a few military officers of the premises a national lab because they weren't scientists

HDE 226868

11 mins ago, by Magnus Wolffelt

@KyleKanos and, and this is where I get confused... are the inner stars also moving faster than expected, or do they fit as expected with normal newtonian gravity from visible mass?

@KyleKanos I'd love to have the chutzpah to do that.

Kyle Kanos

He thought they wouldn't be qualified to understand what he was offering to sell them

Walter Baade, Zwicky's collaborator on many things, swore that Zwicky was going to kill him and was often referred to as a Nazi by Zwicky (Baade was German)

Magnus Wolffelt

what does the dollar signs around r mean here? like $r$ ?

ACuriousMind

91

A: Should chat have TeX support?

I will leave the original post for historical reference, but as mentioned in the Update below, all four bookmarks are located on this installation page. There are four bookmarks: start ChatJax installs MathJax and starts a loop that renders $\LaTeX$ as needed. This is intended for use in chat, ...

Kyle Kanos

@MagnusWolffelt We have MathJax enabled in chat

The dollar sign is what makes it render as LaTeX, if you have "ChatJax" enabled

Magnus Wolffelt

5:26 PM

I see

Kyle Kanos

There's a suggested edit in the queue on this question (revision history). The edit wants to revert back to original version

Magnus Wolffelt

other question, (lol).. is there any evidence that gravity can be occluded, sort of like light? that for example a small moon behind big planet experiencing slightly less gravity from the star, than expected?

ACuriousMind

@KyleKanos Well...not wrong in this case, I'd say, but not really the purpose of suggested edits, either

Kyle Kanos

I mean, it does deviate from authors intent since it was the author who changed it.

But that reject reason says original intent of post

ACuriousMind

8

Q: Can gravity be shielded, like electromagnetism?

If I remember well, they said that it can't, but I do not know why. Yes, I meant if gravity can be shielded using something like a Faraday cage (or something else?). Thank you.

Also, this and other links

Slereah

5:35 PM

IIRC you can shield gravity but it requires a ludicrous combination of exotic matter

Magnus Wolffelt

thanks

NeuroFuzzy

I should change my username to a picture of my cat too. That seems to be the trend.

ACuriousMind

...your username?

Also, I'm not a cat :P

Kyle Kanos

I'm not a cat either

NeuroFuzzy

derp, picture. I guess I'm half awake

0celo7

5:39 PM

@ACuriousMind I'm going to name my second cat after you

NeuroFuzzy

@KyleKanos on the internet no one knows if you're a cat

ACuriousMind

@0celo7 Um...thanks, I guess?

HDE 226868

@0celo7 Change "cat" to "child".

ACuriousMind

I always wanted to step into Einstein's footsteps ;)

2

Kyle Kanos

2

spiders not cats

skill patrol

5:40 PM

@0celo7 Einstein and a curious mind?

Kyle Kanos

No, Bjoern

(which I still pronounce in my head as bajoran)

skill patrol

nobody names their cat Bjoern :P

0celo7

@KyleKanos Me too and I speak the language

ACuriousMind

@KyleKanos lol

0celo7

I hate when people speak English and put a forign accent on foreign words. All or nothing.

Kyle Kanos

5:43 PM

Par lez voose fran-swah

Slereah

I do actually

Being French and all

skill patrol

@ACuriousMind do you recall when we talked about the difference between the moore method and the socratic method?

Slereah

"So-Crates?" He's listed under Socrates dude! c/o Tommified.

►

this is what I know about Socrates

ACuriousMind

@skillpatrol Yes

skill patrol

@ACuriousMind Anyway I found this

Halmos makes it clear.

btw moore was only 3 years younger than einstein

Slereah

5:56 PM

Patrick Moore?

Kyle Kanos

Michael Moore?

Slereah

Patrick Moore Plays The Xylophone : animated music video : MrWeebl

:D

Dennis Moore?

Your life, or your lupins

Kyle Kanos

5:58 PM

Mandy Moore?

Kyle Oman

is it possible to undo a review?

HDE 226868

14

Q: Is it possible to undo a review action

I just reviewed a proposed edit on a SO question. At first it seemed that the edit was just just "how to" to "how-to". So I rejected the edit. However, my mistake turned out to be that there also was a change to a hyperlink in that edit which was relevant and should be approved. Is there any way ...

support review

@KyleOman - Nope. What was the review?

Kyle Oman

thanks @HDE226868

skill patrol

Kyle Kanos

Rotate 45 degrees to the left, resubmit

Kyle Oman

6:22 PM

oww my brain... can't decide whether I'm being tricked with perspective, or with image editing :(

0celo7

@KyleOman this

Kyle Oman

the shadows appear fairly convincing, so I'm leaning perspective, but... oow

6:46 PM

lol

lol

Ah, but that's only to "particpate". You can still participate.

0celo7

@HDE226868 lol

skill patrol

@ACuriousMind what did you think of the vid?

ACuriousMind

6:49 PM

@skillpatrol I bookmarked it for later viewing, so I don't think anything of it yet

skill patrol

enjoy pal :)

let me know

I will

Hi @JohnDuffield

what video is this

1 hour ago, by skill patrol

@ACuriousMind Anyway I found this

0celo7

6:58 PM

ic

John Duffield

@0celo7 : no, a black hole isn't "a region of the spacetime manifold which lies outside of the past of null infinity". LOL! Where on Earth did you get that Humpty-Dumpty lost-in-maths definition from? Really. Come on, tell me. Do you know any physics at all? How old are you? @skill patrol: Hi.

ACuriousMind

@JohnDuffield If you knew what you were talking about, you'd see that that "Humpty-Dumpty definition" is actually the precise statement of what it means for light being unable to escape a black hole. Something which is not in the past of future null infinity is something from which light cannot escape, i.e. something which is black, to say it in terms you might understand.

The advantages of this way of phrasing it is that it does not resort to any coordinate choice at all, and is a statement about the actual structure of the spacetime instead of singularities which may or may not be visible in certain coordinate choices.

skill patrol

7:15 PM

Sooty?

NeuroFuzzy

Sweep?

skill patrol

Larry the Lamb?

0celo7

+20?

I didn't even know about it.

skill patrol

!

John Duffield

@ACuriousMind : I know what I'm talking about. Light doesn't escape a black hole because at the event horizon the coordinate speed of light is zero. Einstein called it the speed of light. @skill patrol : sock puppets.

Kyle Kanos

7:16 PM

I agree, it's not really a great answer. It is ultimately correct to first order, however.

0celo7

@JohnDuffield No, light can't escape a black hole by definition of black hole.

skill patrol

just like division by 0 at the singularity

0celo7

@JohnDuffield Hawking & Ellis (1973), Wald (1984), Straumann (2013) are three that I own.

ACuriousMind

@JohnDuffield The coordinate speed in which system, and why do you privilege that system over others? Do you know what the term general covariance means? All actual statements must be able to be phrased in a way that is independent of a choice of coordinate system, since nothing prescribes a particular choice of system.

0celo7

@skillpatrol That produces a unicorn, durr.

NeuroFuzzy

7:20 PM

@0celo7 ohhhhh b/c of the simple pole

0celo7

@NeuroFuzzy Yup. Use the fact that a pole (point, the singularity) in twistor space is a null geodesic, and at the end of every ~~rainbow~~ null geodesic is a ~~pot of gold~~ unicorn.

@ACuriousMind your coordinate system is triggering me, check its privilege!!

@JohnDuffield Aww, you got me

::cries::

ACuriousMind

Beat it?

Michael Jackson - Beat It

►

0celo7

@JohnDuffield Do you want page numbers?

ACuriousMind

(I hope that's the actual song, it's blocked in Germany :D)

HDE 226868

@JohnDuffield I have suspended you for one hour to cool down because of repeated rude remarks you have made. I would appreciate it if everyone else would avoid discussing it, though, as it would be piling it on. Thanks, all. Back to the schlocky pop songs.

Kyle Kanos

7:24 PM

@JohnDuffield I know it's not a great answer. I said as much. That was literally my first answer.

0celo7

@ACuriousMind poor you

skill patrol

@JohnDuffield nobody wants to be defeated or called a "kid" and told to beat it

ACuriousMind

Alright people, back to video games and cat pictures.

skill patrol

later pal

0celo7

I have to read shit about feelings

And time management

HDE 226868

7:27 PM

Whoops, I called Michael Jackson "schlocky".

ACuriousMind

I don't even know what "schlocky" means

0celo7

You should, you're one.

ACuriousMind

@0celo7 Oh, no, feelings!

I had those once.

It was awful

I got better

skill patrol

nothing more than feelings?

0celo7

16 hours ago, by ACuriousMind

@0celo7 What, you expect people to retain their emotional state for longer than a few seconds?

Essential (health-related)
Important (academics, work)
Optional (social)

Important and Essential should be swapped.

skill patrol

7:29 PM

Feelings by Morris Albert

►

that^ better not be blocked in germany

ACuriousMind

Indeed it is not.

skill patrol

:D

0celo7

is this now a music thread?

ACuriousMind

I'm...not sure

skill patrol

beat it kid

0celo7

7:31 PM

YG - Ima Real 1 [Official Video]

►

ACuriousMind

This is the hbar, it's whatever we want it to be!

@0celo7 Blocked :D

0celo7

Ace Hood - Bugatti (Explicit) ft. Future, Rick Ross

lol

"Eat It" is a 1984 song by comedy music artist "Weird Al" Yankovic. It is a parody of "Beat It" by Michael Jackson. The track was both a commercial and critical success, earning Yankovic a Grammy Award. According to Yankovic, when he presented his lyrics to Jackson for review, he didn't know what kind of reaction he'd get. Jackson allegedly thought it was amusing, and agreed to allow the parody. On October 19, 1989, the RIAA certified "Eat It" as a gold single. == Reception == The single reached number 1 in Australia, and it was his highest-charting U.S. single on the Billboard Hot 100 at number...

ACuriousMind

@0celo7 Blocked :D

skill patrol

7:31 PM

STAAAAAP

0celo7

@skillpatrol what

skill patrol

the insanity

Kyle Kanos

PriZm, Christian Pacaud - Holy Judgement (Final Destination) [Part 2]

►

2

skill patrol

nvm

Kyle Kanos

9.5 minutes of awesome

0celo7

7:32 PM

Headhunterz - Dragonborn (Official Videoclip)

►

NeuroFuzzy

ooh I was annoyed but i just realized i brought my headphones to the library so i can actually listen to some!

0celo7

go to 2:15

ACuriousMind

@KyleKanos Not blocked. And nice.

skill patrol

+1

0celo7

what is this music @KyleKanos

why do you listen to such things

skill patrol

7:34 PM

beat it head hunter kid

or do you prefer kid head hunter?

ACuriousMind

@0celo7 Why should he not?

0celo7

Kendrick Lamar - Swimming Pools (Drank)

►

only good music is hard dance, hardcore, rap and dubstep

Kyle Kanos

@0celo7 Video Game Remix. It's originally from either Tales of Phantasia or Tales of Symphona

ACuriousMind

@0celo7 Tsk.

0celo7

@ACuriousMind prove me wrong

Write a proof.

NeuroFuzzy

7:36 PM

Radio Moscow - 250 Miles

►

0celo7

@NeuroFuzzy figures

NeuroFuzzy

Awesome guitar 1/2way in.

0celo7

Jay Rock - Hood Gone Love It ft. Kendrick Lamar

►

NeuroFuzzy

@0celo7 Figures? I didn't link that before did I...?

0celo7

@NeuroFuzzy it's very CA

ACuriousMind

7:37 PM

IRON BUTTERFLY - IN A GADDA DA VIDA - 1968 (ORIGINAL FULL VERSION) CD SOUND & 3D VIDEO

►

0celo7

@ACuriousMind are you serious?

Rick Ross - Box Chevy (Explicit)

►

the video is pretty retarded

ACuriousMind

@0celo7 I'm not sure :D

Alright, we know now that you really like rap ;)

0celo7

> Minimize other time-consuming activities and distractions (TV, video games, etc.)

@ACuriousMind no

I have a lot more hardstyle.

@ACuriousMind Why does Germany have such barbaric YouTube laws?

ACuriousMind

7:43 PM

@0celo7 Dunno. The GEMA is an archaic organization which is opposed by many individual artists, but it somehow still exists.

Kyle Kanos

@0celo7 Germans aren't allowed to have fun

0celo7

@KyleKanos I expected this

@ACuriousMind VPN?

I mean, it's pretty ridiculous that artists can post music on VEVO and get blocked in DE

ACuriousMind

@0celo7 Is possible, but annoying, especially since they periodically block also known VPN servers used by Germans

Kyle Kanos

-1

Q: Would a person gain or lose weight after expelling a flatus?

Considering the chemical composition, mass, and pressure range of typical human flatulence, would a person gain or lose weight after passing gas?

pressure weight volume

skill patrol

wtf

ACuriousMind

7:47 PM

This question probably can't be answered without knowing the composition, etc., of said flatulence. Does such data exist? — David White 20 mins ago

0celo7

wtf

how would you gain

ACuriousMind

Asking the real questions.

0celo7

am I retarded

Kyle Kanos

@0celo7 Because science

ACuriousMind

@0celo7 If it's helium, you could get "heavier" after "expelling" it.

0celo7

7:48 PM

@ACuriousMind can you watch youtube.com/watch?v=AoTUMc07eok

Kyle Kanos

And apparently I deleted my Picard bookmark?

(but also found it online too)

0celo7

@ACuriousMind I see...

ACuriousMind

@0celo7 Surprisingly, yes

0celo7

It's a Dutch artist

That's a perfect example of "they were on drugs" when filming

Kyle Kanos

Nope, just hidden

0celo7

7:50 PM

tvtropes.org/pmwiki/pmwiki.php/Main/…

> Any task that exceeds 90 minutes should be broken into smaller components with 15 minute breaks in between.

You're telling me I should take breaks when doing RPG grinds?

skill patrol

yes

Kyle Kanos

If you're doing a speedrun, you aren't allowed breaks unless there's an FMV

0celo7

FMV

Full Metal Vehicle (crashing through the window)

cutscene?

7:54 PM

Yes, that's what FMV means

Full Motion Video

0celo7

is that supposed to be 5 fps

also why is that famous, cf. the description

Kyle Kanos

@0celo7 As with the original, it should be 30 fps

0celo7

does that look 30 fps to you?

Kyle Kanos

Yes

0celo7

tfw the only truly smooth thing you've seen is vanilla Morrowind @ 120 fps

120 is melted butter on wet ice

Kyle Kanos

7:57 PM

I'm pretty sure I played Morrowing at 40 fps

0celo7

I get 40 in the jungle area with my flora mod

60 everywhere else

YungHummmma

Is there some way to find things like conduction electron density for metals?

it seems like something that should be very common knowledge but I can't find it

ACuriousMind

Finding material properties is very annoying, I remember hunting for some heat capacity values

YungHummmma

Every damn time I have to do it I'm surprised by how hard they are to find

electron densities, work functions, electron affinities, mobilities

0celo7

@ACuriousMind not having the CRC tables within arm's reach at all times

0

Q: Books of dynamo theory

I wanted recommendations of dynamo theory pdfs to make a report about magnetic fields of planets and stars with all the math behind it, like vector calculus, Lagrange functions, partial differential equations, and also to know what other requisites does it need.

electromagnetism newtonian-mechanics magnetic-fields planets

Ahh, that brings me back. I had no clue what a dynamo was when I moved to Germany. I got strange looks in class once when I asked "why not use batteries".

0celo7

8:26 PM

@ChrisWhite been busy lately? haven't seen you around much

user54412

@0celo7 Traveling, fixing my computer, playing PoE, and even doing research here and there.

0celo7

freaking PoE

It has taken two ~~good~~ men from us already

ACuriousMind

@0celo7 I'm a man? I thought I am Alicia Keys?

John Duffield

Huh? We were having a physics conversation, some 16-year-old "moderator" suspended me for an hour for responding in kind, and since then the chatroom has descended back to the usual into trivia and trash that brings physics into disrepute. Well, at least there's no talk of murdering people today, that's a blessed relief. Anybody want to talk physics? No? Hello? Anybody?

0celo7

@ACuriousMind don't be ridiculous

ACuriousMind

8:32 PM

Who am I?

Kyle Kanos

@JohnDuffield Contrary to popular belief, physicists don't always talk only about physics.

0celo7

oh yeah, I found someone to kill in Oblivion because they glitch out and walk off into the distance, but the unofficial Oblivion patch fixes that :/

I have to find some other poor soul to satisfy the dark brotherhood

John Duffield

Uh oh, here's comes the murder again

Kyle Kanos

@0celo7 Doesn't the killing have to be with a knife or sword, and not a ranged weapon?

0celo7

@JohnDuffield yeah thanks for reminding me buddy :D

@KyleKanos yeah, maybe

but the person walks far enough away that the guards won't come running

well not anymore, the patch fixed her pathfinding

user54412

8:34 PM

@ACuriousMind Do you use an item filter? I'm finally getting around to writing one, but I'm getting distracted by learning vim's sub-replace-expression capabilities to generate it.

Kyle Kanos

> Note that you cannot just personally see to an NPC's death; you must actually murder them in accordance with the game's crime engine. For example, if you have a poison or enchantment that does damage over time, and it's the poison or enchantment, not the initial attack, that does the final point of health damage, you will not trigger the questline.

0celo7

@KyleKanos I was planning to use my sward

Kyle Kanos

So you might be able to do it with a B&A or magick

Here's a list of NPCs that you can kill: uesp.net/wiki/Oblivion:Dark_Brotherhood#Joining

0celo7

@ChrisWhite writing one? You CS nerds are crazy

ACuriousMind

@ChrisWhite No, so far, I've relied on the power of my eyes

Although I'm sure I've missed some chromes through that.

0celo7

8:37 PM

@KyleKanos thanks

right now my Oblivion strategy is to walk to every city and start as many quests as I can

Currently walking to Kvatch

ACuriousMind

@ChrisWhite: What do you intend to filter for, anyway? Anthing special the already available ones don't do satisfactory for you, or do you just want to have it written yourself?

user54412

Just write it myself. Also, I want mine to be pretty basic -- just outline some good things, without adding 57 new colors to train my brain on.

John Duffield

Oh boy, death, killing, and sward.

ACuriousMind

Soo...highlight chrome sockets, six sockets, and good items to chance, besides rares and uniques?

0celo7

@JohnDuffield merriam-webster.com/dictionary/sward

user54412

8:46 PM

@ACuriousMind Also things where ItemLevel is not much higher than DropLevel -- good for lower levels. The problem is I'm pretty sure this has to be done with ~80 statements, since one can only compare variables to literals rather than variables to variables.

Slereah

a sord

mspaintadventures.com/?s=6&p=003727

ACuriousMind

@ChrisWhite Ah, I see.

Emilio Pisanty

From the facepalm archives

>I also want to know why I'm a tube with one end open and one end closed,

2

0

Q: What are harmonics?

What are harmonics? From what I read, harmonics simply refer to the frequency of a string vibration or the air vibration inside the tube of a flute, ONLY. My book didn't list any other source of harmonics. So I presume it can only be produced by either guitar string or flute. What intrigue...