The h Bar

ManishEarth

03:48

@ChrisWhite Oh, we know about that one. /cc @jinawee Thanks for the link

If you see any posts of a similar type from this or another user, ping me in chat.

user54412

sounds good

user54412

lol - I'm sitting here writing a Type Ia supernova paper, dealing with reviewers who insist I need to conform to what is generally accepted about progenitors and spectral features, while reading new papers on arxiv that just go to show we have no idea what the progenitors are or what we're seeing in the spectra

ManishEarth

08:26

@ChrisWhite Be a rebel and reject both, instead conform to neutrino cupcakes :P

(Also, what's a progenitor? And why don't we know much about spectra? I thought spectra were a highly accurate tool in astro)

RhysW

08:38

@ChrisWhite haha, conform to this thing we know nothing about!

Anonymous

@jinawee Ha, see the "(maybe me)" : )

RhysW

10:26

Saw a message today saying that physics is too small to be split, too small!!

Physics is the basis of the entire universe and everything in existence, but is too small! The logic escapes me :P

Physics Meta

11:35

0

Q: Do we need a *Beginners* tag?

Some time ago I asked if we needed a tag to distinguish questions asked by beginners. The answer was no on the grounds that a layman or beginner tag would be a meta tag and these were frowned on. However we now have a homework tag, and it seems to me that a layman tag is no more meta than the hom...

discussion

Crazy Buddy

12:13

Alright... Physicists of Phys.SE, what did y'all wear for Halloween? :D

Any picture I can enjoy watching? :P

Gotcha @PhysicsMeta, what did you wear today? You're always wandering around with that grayscale 80s' style...

UV-D

Hmmm I am seriously wondering that as a non-theoretical physicist, that I should even bother contributing anymore on the site... (judging by the meta discussions)

Crazy Buddy

Meh... (even as a theoretical physicist), why should you bother?

Anonymous

@CrazyBuddy Oh, no Physics Meta was wearing the Wikipedia Costume

Anonymous

Anonymous

Or for a nicer version: .

Anonymous

12:27

Crazy Buddy

Grayscale -- I'm bored -_-

Anonymous

And no, it was not by purpose that I put the right eye on the omega.

Anonymous

UV-D

Okay, fair enough @CrazyBuddy

user43418

12:44

Hello

Anonymous

Now, it's green-scale. : )

Anonymous

Huh, why did my comment get submitted so late?

Physics Meta

13:21

0

Q: applied physics based questions

I have to be honest, I am seriously unsure as to whether applied/experimental physics questions would be welcomed here. There are a lot involved in theoretical physics (which is great), but, would applied and experimental physics just be looked down upon? I am NOT talking about homework based ex...

discussion

tpg2114

16:10

@UV-D I'm realizing the SE sites in general are far more enjoyable when you don't know the meta portion exists. Those conversations are like looking for the man behind the curtain.

Physics Meta

16:50

0

Q: Why isn't this duplicate closed?

I flagged this question as a duplicate, the flag is marked as helpful. But it didn't get closed, I commented in chat and it's still open.

discussion duplicates

Crazy Buddy

17:16

Is that a scary face of @PhysicsMeta? o_O

If you look close enough, you can find the eyes...

But, it's not in its profile though -_-

I'm happy @PhysicsMeta: At least you heard my voice :P

jinawee

17:43

@CrazyBuddy It's a pareidolia

Crazy Buddy

18:54

@jinawee What's that? o_O

jinawee

19:09

@CrazyBuddy You see faces where there aren't.

Pareidolia

Pareidolia ( ) is a psychological phenomenon involving a vague and random stimulus (often an image or sound) being perceived as significant, a form of apophenia. Common examples include seeing images of animals or faces in clouds, the man in the moon or the Moon rabbit, and hearing hidden messages on records when played in reverse. The word comes from the Greek words ' (παρά, "beside, alongside, instead") in this context meaning something faulty, wrong, instead of; and the noun (εἴδωλον "image, form, shape") the diminutive of eidos. Pareidolia is a type of apophenia, seeing patterns i...

aufkag

19:44

@jinawee What is called if you seem to be hearing sirenes long after they have gone?

ManishEarth

Oy! @aufkag! Hello!

aufkag

@ManishEarth Oy

Wazzup

ManishEarth

differential equations -_-

aufkag

Yes, sure, with my eyes closed and two fingers in the nose.

jinawee

@ManishEarth Already answered, but isn't it about engineering?

0

Q: rotating an object without changing its orientation

I have a link hinged at one end and attached to a rectangular object via another hinge in the other end as shown. Now, I was wondering how would I maintain the orientation of the rectangular object regardless of the rotation of the link. I know this sounds like a vague question but I am just ou...

rotation

ManishEarth

19:52

@jinawee physics.stackexchange.com/review/close/25368

Huh, I voted to leave open

UV-D

@tpg2114 yes, but they go some way to explain the attitude some members have towards some topics.

ManishEarth

@tpg2114 Unfortunately this is very true. Though not on all sites, I've seen some great meta communities elsewhere. Usually comes with having a coherent and cordial main community

Ours is a bit more ... spiky

Crazy Buddy

20:08

@jinawee Maybe it was the effect of Halloween :D

(on my computer though...)

aufkag

@ManishEarth Is there a way to remove oneself of just one of the SE sites? Getting one's username in grey and stuff?

ManishEarth

@aufkag Yes.

aufkag

OK. Pls?

ManishEarth

You can request for your username to be removed from specific posts, or

you can ask for your account to be deleted. Which is per site

@aufkag You want account deletion? On Phy?

:(

aufkag

No, I want to be deleted from Sports SE.

ManishEarth

20:18

@aufkag Ah. How much rep do you have? IIRC mods cannot delete after a certain rep level

However, you can do this

one sec

hmm, 866

aufkag

My stuff can stay. I just want out. Grey.

ManishEarth

@aufkag sports.stackexchange.com/contact There's an "I want my account deleted" option.

Fill it in (give your reasons if you wish to)

there will be instructions following that

aufkag

@ManishEarth I only see "I need to delete my user profile". Is that it? Will I keep my user profiles on other SE sites?

ManishEarth

@aufkag yes that one. That will work

aufkag

@ManishEarth Will I keep my user profiles on other SE sites?

ManishEarth

20:23

yes

Don't worry, that form is per-site

@aufkag There's one step where you edit your profile to say "please delete me" (not sure if it's still there, it used to be). Make sure you just edit your sports profile, and you don't copy it to all sites

aufkag

@ManishEarth OK, done. We'll see. Thanks.

ManishEarth

Any reason you want to share?

aufkag

@ManishEarth Sure. Pissed off by herd-voting, non-voting, silly mod, basically the lack of logic on the site. I've seen completely illogical answers upvoted to +17.

ManishEarth

@aufkag ah

aufkag

@ManishEarth Just to keep you sharp!

ManishEarth

20:32

heh

aufkag

20:43

@ManishEarth Did Ben stay here or is he gone?

ManishEarth

@aufkag Still around on other SE sites, but as far as I can tell, has not done anything on Phy since his post: stackexchange.com/users/506533/ben-crowell?tab=activity

He may come back, or he may not

I don't think he's read the responses on the meta post either (was hoping some of them might deter his decision) by his "last seen" time :/

aufkag

The Great Outdoors must be fun also. :)

ManishEarth

Outdoors? What is this witchcraft you speak of?

I've never seen any outdoors. Though it seems to be a scary place. Not at all great.

It's full of people. And green stuff. shudders

aufkag

@ManishEarth Look around your enclosure. Perhaps there is a rectangular panel with a knob. Twist the knob. Push/pull.

ManishEarth

That knob? Noooo there is this thing that hurts my eyes out there!

I prefer the enclosure. Nice and dark.

No green things. No people.

aufkag

20:54

@ManishEarth Quite unbelievably, 't Hooft is still watching us. I hope he returns.

ManishEarth

@aufkag I don't think 't Hooft left, he's just busy.

I was surprised a guy like him had the time to participate here in the first place

Same goes for Shor

aufkag

@ManishEarth You think he forgot to remove a window from his computer, which he never turns off? Something like that?

ManishEarth

@aufkag I mean that he never decided to leave the site. He just got more and more busy and had to cut down on contributions

kinda like what's happening to me, though I bet 't Hooft is orders of magnitude more busy than I am :P

aufkag

Why, he's retired. Isn't he?

ManishEarth

oh, right

didn't think of that

Then again, probably building a sekrit quantum computer under his house so that he can crack RSA and make oodles of money

aufkag

21:07

@ManishEarth He's still listed among the employees of Utrecht University, so perhaps he's not retired after all.

ManishEarth

@aufkag hmm. Wait, I think he currently is working on something

involving cellular automata

aufkag

@ManishEarth Yeah, that's true. Although I haven't seen anything recently. Didn't really get the traction he was probably hoping for.

@ManishEarth I'm off. Happy moderating! :)

ManishEarth

@aufkag /me studying. Not moderating :P Cya!

tpg2114

22:05

Does anybody know if there is a standard notation for the lower triangular portion of a generic matrix?

ManishEarth

@tpg2114 I don't know of any

tpg2114

Me neither... I hopped into the math room to see if they knew

All I could come up with would be A_L and I have to explain what the _L means

But if I have to explain, then it's not standard :)

ManishEarth

22:19

@tpg2114 ISO 9001:200 certifed matrices

FOURIER TRANSFORMS!!!

tpg2114

I prefer Laplace transforms personally

ManishEarth

haha well for solving differential equations Laplace is better

But fourier transforms works beautifully with physics

I just realized that the fourier of the Hermite eqn is the Hermite eqn

...in retrospect, I should have figured it out

tpg2114

Yeah, turbulence is like 75% Fourier transformations

ManishEarth

Still, beautiful

tpg2114

And 25% statistics of those Fourier transforms

ManishEarth

22:21

A lot of solid state physics is full of fourier transforms

everything is fourier transforms

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