The h Bar

user 2646

12:41 AM

@dmckee have you read any of A. P. French's textbooks?

dmckee

@user2646 Oddly, no. I looked at some reviewers earlier, and I've put it on my get-a-round-tuit list.

user 2646

:-)

danielunderwood

Is there an easy way to keep time/spacelike and sign conventions straight in my head? I always get them mixed around for some reason

Actually nevermind. Those should be the same regardless of sign convention

Avantgarde

1:52 AM

@danielunderwood Choose your metric once and then stick to it!

danielunderwood

But then you read a book that doesn't agree!

dmckee

@danielunderwood 'The' convention?

There are at least three ways to deal with that problem just in special relativity and they are all used.

And that is before you even introduce the metric tensor.

vzn

@user2646 this is cool amazon.com/Vibrations-Waves-P-French/dp/8123909144

danielunderwood

How do you handle them? Like do you pick one and consciously convert everything you read into the one you use or do you change which one you use depending on what you're reading?

And is the imaginary time convention still used much?

I suppose you could also have one with imaginary space, but I've never seen that one

Semiclassical

2:09 AM

imaginary time definitely shows up a lot

danielunderwood

Is the imaginary time metric closely related to Wick rotations?

Semiclassical

yeah

Avantgarde

2:56 AM

I've never seen the imaginary time convention being used in GR books

Probably in some introductory SR book, but not GR

@danielunderwood Just follow the convention of the book you're following

Semiclassical

imaginary time is more of a QFT thing, yeah

danielunderwood

Is it the tabs vs spaces of physics? lol

Avantgarde

Hm?

I think the first place you'll see imaginary time in GR is when Hawking temperature is derived by imposing periodicity of Euclidean time in a Euclidean metric.

But that's way too far into GR.

danielunderwood

3:20 AM

Do people fight over metric sign conventions in physics like programmers fight over tabs vs spaces? I don't know that I've ever met any programmers that actually fought over them though

Avantgarde

Yeah. One physicist ended up with wounds on his face and knees after a brawl.

Gravity/string people prefer -+++ while particle people like +---

danielunderwood

Is there a reason? Most of the equations in the given fields end up with fewer negatives maybe?

Although I'd imagine that particle people wouldn't have to go to more general metrics for the most part

Avantgarde

Yeah, you just want to avoid having too many negative signs.

Particle people like flat spaces.

Semiclassical

one principled reason to prefer the -+++ convention is that it requires only one wick rotation instead of three

Avantgarde

Even with +--- you can Wick rotate the time coordinate and you're done.

danielunderwood

3:54 AM

aiweirdness.com/post/171451900302/…

neural nets getting things wrong always makes me laugh for some reason

user 2646

5:17 AM

@ACuriousMind closed as off-topic :P

user 2646

5:49 AM

Fraction (mathematics)

A fraction (from Latin fractus, "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters. A common, vulgar, or simple fraction (examples: 1 2 {\displaystyle {\tfrac {1}{2}}} and 17/3) consists of an integer numerator displayed above a line (or before a slash), and a non-zero integer denominator...

Akash. B

6:00 AM

hi

user157860

@JohnRennie, Hi John, I am trying to use the formula that substituted the Lorentz factor to determine the relativistic mass/energy: $$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c c ( .75c+ 1) =1.32 m_e$$ Can you help me understand hot to use it? should I get the same result I get with Lorentz? I tried with v 0.866c, but instead of m_0c^2 2 I get * 1.32? What's wrong?

Semiclassical

$p=mv$ is the nonrelativistic formula for momentum

it is not valid at relativistic velocity. as such, it is not legitimate to write $p^2c^2=(mc)^2 v^2$

user 2646

@user157860 he is in here

user157860

@user2646 Thanks, can you tell me why I do not read formulae properly? should I activate something? How do you read the formula I posted?

Semiclassical

use the mathjax link in the room description (upper right)

John Rennie

6:08 AM

@Semiclassical it isn't that. The equation isn't rendering for me either

$$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c c ( .75c+ 1) =1.32 m_e$$

Hmm, it renders there fine

Semiclassical

huh

My guess is that there's an asterisk making things weird

Anonymous

@user157860 You started the italics midway

Anonymous

@Semiclassical Yeah, that's the probable explanation

Anonymous

$$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c c ( .75c+ 1) =1.32 m_e$$ italics test

Anonymous

Ah

Anonymous

6:13 AM

Gaps are fine. Don't use an asterisk within

user157860

6:24 AM

@JohnRennie, Hi John, I am trying to use the formula that substituted the Lorentz factor to determine the relativistic mass/energy: $$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c c ( .75c+ 1) =1.32 m_e$$ For v=.866c I get $$1.32 M_e$$ instead of 2, what did I do wrong?

John Rennie

@user157860 $p = \gamma mv$ not $mv$

So $$ E = mc \sqrt{\gamma^2 v^2 + c^2 } $$

user157860

6:42 AM

@JohnRennie, I see, so: $$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{\gamma^2 v^2 + c^2}= mc c \sqrt{( 4\times.75c+ 1)} = 2m_e$$. Can you explain why this version of the Lorentz factor resolves the problem of relativistic mass? We are considering momentum $$p=\gamma mv$$ instead of mass but the relativistic-or-not mass is still there (hiding in p) . and the increasing inertia of the particle depends on mass and not on momentum, right? so how does this ruse eliminate the problem of relativistic mass?

John Rennie

You can use relativistic mass if you want. Doing so is just writing $m' = \gamma m$. But the rest mass is a scalar invariant in SR while the relativistic mass is not. We normally prefer using invariants in our equations, and you'll find all modern SR textbooks use the invariant mass not the relativistic mass.

If you wanted to use relativistic mass the equation for the energy becomes:

user157860

@JohnRennie, but when you are considering $$\gamma m$$ are you considering rest mass or relativistic mass? in the above example I used m=2: that is 1 rest mass plus 1 relativistic mass, the fact that I embedded it in p does not change the substance, does it?

John Rennie

When any relativist says mass they always mean invariant mass (also called rest mass). No modern relativist will ever use the word mass to mean relativistic mass, or at least not without explicitly making it clear that they mean the relativistic mass.

So when I say $p = \gamma m v$ the $m$ is the invariant mass. Likewise for the $m^2c^4$ term.

user157860

@JohnRennie, we can use another term, like increased mass or kinetic mass?

John Rennie

Just don't use the concept of relativistic mass. It is never necessary and it has confused generations of students.

user157860

6:55 AM

@JohnRennie, OK, i do not particularly like the term, what I was trying to ascertain if the new formula is just a ruse, that sweeps the problem under the carpet or if we can really consider the total content of energy or momentum to explain the issue

John Rennie

I don't understand what you mean by a ruse. The energy equation comes from the four momentum. In SR the norm of a four-vector is a scalar invariant, and the norm of the four-momentum is the invariant mass (give or take some factors of $c$).

The four momentum combines the energy and momentum. The individual components of the for momentum depend on the frame, i.e. the energy and the momentum, depend on the frame. Which is true even in Netwonian mechanics of course.

But the norm of the the four-momentum is invariant.

user157860

@JohnRennie, I see, I have to retrace my readings and find the statements that triggered that conviction, but anyway you clarified my main doubt, there is indeed an increase of mass, but we'd better not call it relativistic mass. Thanks!

John Rennie

There isn't an increase in mass

user157860

@JohnRennie, oh uh!

an electron at .866 c does have 2 rest masses of inertia or not?

John Rennie

The word mass always means invariant mass, which is obviously invariant.

user157860

7:05 AM

what do you call the difference in inertia 1+1? increase of what?

John Rennie

If you insist on using the Newtonian expressions for momentum and KE then you find you have to replace the mass by $\gamma m$. But this is an artefact of using the Newtonian expressions when they don't apply.

If you use relativistic mechanics you'll find the mass is always just $m$.

user157860

can you explain in plain terms why, according to Relativity it is more difficult to accelerate an electron at .866c? We must spend same KE as for 2 particles, right?

John Rennie

In SR the equivalent of the second law is just $F = ma$ where $F$ is the four-force, $a$ is the four-acceleration and $m$ is the invariant mass.

In the rest frame of the object being accelerated this reduces to the Newtonian expression where the Newtonian force and acceerations are the norms of the two four-vectors. The advantage of using the relativistic expression is that it is true in all frames.

user157860

@JohnRennie, what I do not understand is this: if that is so simple in SR, whid did Einstein himself use the term relativistic mass in1905 (when SR was ready), passing the rest of his life to regret it, criticize and abjure it?

John Rennie

Because in the 113 years since we have greatly clarified how relativity is formulated. If you read Einstein's original papers you'll find them hard going, while the courses taught to undergrads these days are far easier to understand.

This is true of GR as well.

user157860

7:18 AM

Ok Thanks a lot!

John Rennie

In fact it's true of every physical theory I can think of. As time goes by we understand them more deeply so we can write them down more simply.

Avnish Kabaj

$_hrfbj_$

Akash. B

@AvnishKabaj what's this?

guys I am bored make me familiar with the theories

Avnish Kabaj

7:41 AM

Nothing I was just trying to figure out why t did this not render

2 hours ago, by user157860

@JohnRennie, Hi John, I am trying to use the formula that substituted the Lorentz factor to determine the relativistic mass/energy: $$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c c ( .75c+ 1) =1.32 m_e$$ Can you help me understand hot to use it? should I get the same result I get with Lorentz? I tried with v 0.866c, but instead of m_0c^2 2 I get * 1.32? What's wrong?

$$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c c ( .75c+ 1) =1.32 m_e$$

Gottit

$$E = \sqrt{p^2c^2 + m^2c^4}=mc\sqrt{v^2 + c^2}= m/c _c ( .75c+ 1) =1.32 m_e_$$

Two stray underscores

@Akash.B start grade 11/12

Anonymous

7:55 AM

@Akash.B "Information is not knowledge" -Albert Einstein

Avnish Kabaj

Hulululululu

Anonymous

Oh also, learn the rules before playing the game.

Avnish Kabaj

- Avnish Kabaj

Anonymous

ಠ_ಠ

Anonymous

8:43 AM

12

A: Are there any statistics that show how many scientists are Christians or otherwise believe in a personal God?

In 1998, Edward J. Larson and Larry Witham published an article in the leading scientific journal, Nature, their findings on the percent of believers among scientists in the National Academy of Sciences: We found the highest percentage of belief [in God] among NAS mathematicians (14.3% in G...

Anonymous

Hmm, this is some interesting data

Akash. B

9:54 AM

@IceInkberry what do you meant by that?

Avnish Kabaj

@Akash.B dunno she's sort of weird

Don't take it personally

Secret

You learn nothing from goose force feeding

Avnish Kabaj

11:08 AM

What's wrong with number three?

John Rennie

@AvnishKabaj temperature is not an extensive property

Avnish Kabaj

@JohnRennie I meant the magnet one

John Rennie

@AvnishKabaj the forces apply to all four magnets. If you add up the torques created by all four magnets you'll find they sum to zero.

Loong

17

Q: What prevents this magnetic perpetuum mobile from working?

As a child, I imagined this device, which may seem to rotate indefinitely. I have two questions. Is this perpetual motion machine already known? If it is, could you please give some references? What is the exact mechanism that makes it stop? By this, I mean an explanation, not simply "because i...

Avnish Kabaj

Thanks @JohnRennie and @Loong

Avantgarde

11:18 AM

hellooo

Slereah

11:45 AM

Hey folks

Avantgarde

Hey Slereah

Akash. B

12:11 PM

hi again

Anonymous

@AvnishKabaj No yuuuu

Akash. B

then what you really meant by that statement?

4 hours ago, by Ice Inkberry

@Akash.B "Information is not knowledge" -Albert Einstein

@Secret I am a chicken!

Anonymous

I mean that, to write sentences you need to learn ABCD first. That way, to learn something higher, you need to know the basics.

Anonymous

That was such a noob explanation

Secret

12:38 PM

ok so this is not ACM I am looking at:

->*Semd budes*

French Foie Gras Cruelty - Animal Equality Undercover Investigation

►

die

chicken chicken chicken:

Chicken chicken chicken

►

shoots chicken, take out bullet, dice into pieces, throw into a pot, cook and then eat

Anonymous

Obsessed with chicken

Secret

this chicken is a classic

harambe

@ACuriousMind can I talk now??

Semiclassical

12:57 PM

@Secret chicken chicken, chicken out chicken, chicken into chicken, chicken into a chicken, chicken, and then chicken

Secret

chicken chicken, chicken chicken chicken, chicken chicken

hen rooster chicken, hen hen rooster hen

Akash. B

chicken farm

ACuriousMind

1:17 PM

@harambe Yes

Time4Tea

Hey, I have a question ..

How do I invite a user to a chat room I've created?

ACuriousMind

@Time4Tea Go to their chat profile, you should see a button to invite them there.

Time4Tea

@ACuriousMind ok. Where can I find their chat profile?

ACuriousMind

@Time4Tea Click on their user name here in chat or search for them here

Time4Tea

Ok. Does that mean they have to have used chat before?

user54826

1:26 PM

wow

ACuriousMind

@Time4Tea yes

user54826

please someone help me out! At physics.stackexchange.com/questions/232267/… I think the answer by my2cents contradicts the currently top voted answer

Time4Tea

yeah, they're not on there

user54826

Could someone confirm my2cents is right and Farcher is wrong? Please?

Farcher had to assume the existence of a resistor to explain a mysterious energy loss when charging a capacitor, while my2cents claimes there is no such energy loss and he doesn't invoke any resistive element

Both did the math differently, and to me, my2cents answer seems the correct one

Please someone confirm this, so I can give an upvote to my2cent so that his answer becomes the top voted

Time4Tea

@user54826 I'll take a look at it in a bit. It's a bit long and I don't have time to read it all right now. If the new answer is better, it should get upvoted :-)

user54826

1:29 PM

dont read it entierly

just the 1st math expression

Time4Tea

So, @ACuriousMind, how do I invite someone to chat, if they haven't used chat before? Sorry for nooby questions ..

user54826

when Farcher calculates the work done by the source to charge the capacitor

he ends up having twice the result of my2cents. just determining who is right there, is enough

Farcher : CV^2 , my2cents: CV^2/2 , Farcher did a multiplication, my2cents did an integral

and I think my2cents is right on the money there. if that's true, then he deserves full credit and Farcher needs to edit his answer else it should be downvoted

wow hyperphysics seems to agree with Farcher: hyperphysics.phy-astr.gsu.edu/hbase/electric/capeng2.html#c4

man this is so confusing

Time4Tea

@user54826 sorry, I'm not that familiar with capacitors, so I don't want to give you a wrong answer. I'll read it a bit later, if I have some time.

user54826

no problem Time4Tea. dont feel obliged at all

also I do not buy the claim that energy is loss in the form of radiation, because a circular loop cannot radiate, if I remember well

so it's possible to play with the geometry to prevent em radiation due to moving charges

Time4Tea

Is it considered unethical for me to ask if one other person can upvote this question?: physics.stackexchange.com/questions/424774/…

I want to invite the OP to chat, as we're getting into a 'discussion' in the comments, but they only have 14 rep points, so I don't think they can chat ...

user54826

1:45 PM

no it's not unethycal. you're basically asking us to review the question. if it's interesting and satisfy our own criteria for question upvote, we'd do it, otherwise not

Time4Tea

@user54826 ok. I want to try to help the user, but don't want to chat in the comments :-)

user54826

but what you can do for now is continue to comment and then flag your answer so that the comments are moved into a chatroom

someone did so either yesterday or 2 days ago, it worked fine

Time4Tea

Ok, that's a good idea. Thanks

Avnish Kabaj

@user54826 afaik oscillations take place in L-C circuits so dunno how's voltage oscillating in an R-C circuit it should just increase exponentially

> So what about the capacitor?

Here you need as small a resistance value in the circuit as possible so that the voltage across the capacitor oscillated between 0 and 2V about V (the final voltage value), just like the spring.

ACuriousMind

@Time4Tea You can't.

user54826

1:52 PM

@AvnishKabaj then my2cts is wrong? but where?

@ACuriousMind do you have an idea why a tag I created yesterday (thermal-physics) points to the tag "thermodynamics" ?

which makes me think I did not create the tag properly

I am unable to add a description for that tag

and when I click on it, it redirects me to thermodynamics tag... why?

ACuriousMind

@user54826 You didn't create it, it has already existed as a synonym of thermodynamics

user54826

@ACuriousMind really? I was asked whether I was sure to create this new tag. I clicked on yes

It did not exist before. If it existed, it was removed, and I recreated it.

I'm sure my question is the only one of PSE having such a tag

ACuriousMind

Well, unfortunately there's no real history on tags, so I can't tell either way. Maybe @Qmechanic made it a synonym?

user54826

I see. that would make sense. thanks a lot!

I also follow some tag, but I Don't notice any difference with not following the tag. so i dunno what it does to follow a tag

Loong

@ACuriousMind Yes, he did: physics.stackexchange.com/tags/synonyms

Avnish Kabaj

2:18 PM

@user54826 that bit is in farchers answer

Qmechanic

@user54826 : Yes, I made it a synonym.

Akash. B

2:38 PM

hello

John Rennie

2:49 PM

Ugh

Hellooo

Hello

What's up?

@JohnRennie cockroach milk is the new super food

@Avantgarde nothing much

Avant garde

Is that french

Avantgarde

Please talk about some good food

My stomach still isn't feeling too well

It's an English word derived from French, I believe.

Now I'm curious how the French say it.

Avnish Kabaj

3:07 PM

Hmmmmm according to my rudimentary knowledge from middle school

It should be

Avoooon gardé

Avantgarde

I will ask a Frenchman

Avnish Kabaj

@Frenchman

Avantgarde

Don't think there's a user by that name.

John Rennie

translate.google.co.uk/?hl=en&tab=wT&authuser=0#auto/en/…

Click the speaker icon to hear the pronunciation

Avantgarde

@JohnRennie It seems half-robotic.

John Rennie

3:10 PM

@Avantgarde slereah is French

Avantgarde

@JohnRennie Great! @Slereah, Hi, how do you pronounce avant-garde the French way?

Also, I'm not sure how good Google translate's pronunciation is for languages other than English.

I just checked a couple of English-Hindi translations and most are fine. But the one for "food" is kinda off.

"chair" is off

danielunderwood

This may seem like an odd question, but are there a large number of Jewish people in physics? Or could it be that people with Jewish heritage are more likely to have that stated on wikipedia and such?

Avnish Kabaj

@danielunderwood read outliers

danielunderwood

3:25 PM

As in I make more of a note of it in my head than when backgrounds aren't mentioned?

gateprep

books.google.co.in/…

Pls tell me what operation they did with the ratio of R

Why is R being used here for unite conversion in work..I am not used to such operations at all

harambe

@ACuriousMind okay

Avnish Kabaj

@danielunderwood the book talks about Jewish immigration and why are they so successful

danielunderwood

ohhh

I thought you meant like outliers in what I was looking at for some reason

Avnish Kabaj

And why most of the Nobel laureates are jewish

danielunderwood

3:28 PM

I was kind of hoping it was an "Einstein effect" where people were inspired by him

Avnish Kabaj

I don't think that's it

Nicholas nassim talebs

Black swan also goes into some depth explaining why are migrants so successful

danielunderwood

And so my reading list grows again

Secret

Digital physics

In physics and cosmology, digital physics is a collection of theoretical perspectives based on the premise that the universe is describable by information. It is a form of digital ontology about the physical reality. According to this theory, the universe can be conceived of as either the output of a deterministic or probabilistic computer program, a vast, digital computation device, or mathematically isomorphic to such a device. == History == The operations of computers must be compatible with the principles of information theory, statistical thermodynamics, and quantum mechanics. In 1957, a link...

hmm... symmetres are continuous...

gateprep

3:50 PM

Holla is anybody willing to help me?

danielunderwood

R is just a constant that handles getting to the units you want

Well and to make things dimensionally consistent

gateprep

But as far as I knew R was a constant of proportionality

Why are we using them to flip units?

danielunderwood

Convenience I suppose

vzn

4:05 PM

@Secret much more on digital-physics vzn1.wordpress.com/2017/03/31/…

danielunderwood

hmmm #classical-mechanics

how do you link a tag?

Oh and I think some people stick with a given value of R and convert units from there as well

ACuriousMind

@danielunderwood [tag-name]

Anonymous

(Hint: If you ever want to look how someone does something in the chat, look up at the history of the message)

danielunderwood

oh neat I didn't know history did that

Emilio Pisanty

5:07 PM

whyyyyyyyyyyyyyy

whyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy??????????????

Semiclassical

ow

2

just ow

Emilio Pisanty

exactly

Avnish Kabaj

After a search for @AvnishKabaj

I got 4 pages of results

Any guesses for how many pages @JohnRennie got?

ACuriousMind Trump's John Rennie

2

Emilio Pisanty

timeshighereducation.com/blog/…

> “We appreciate the very candid critical insights of 2 anonymous reviewers, M. Gompper, and K. Beard.”

that's a new one

Anonymous

We have two super secret agents, Mr. Howdy and Mr. Dowdy

Emilio Pisanty

5:23 PM

I'm surprised THE missed this classic

> "This work has been carried out despite the economical difficulties of the authors’ country. The authors want to overall remark the clear contribution of the Spanish Government in destroying the R&D horizon of Spain and the future of a complete generation."

Anonymous

5:34 PM

@AvnishKabaj More like they were forced to be successful, due to the pressing circumstances

danielunderwood

5:45 PM

That's some high quality tex work

Avnish Kabaj

@Blue that's one of the reasons

danielunderwood

hmmm arxiv.org/abs/1503.01104

Anonymous

@danielunderwood Lol

danielunderwood

Only a couple years late

It looks like it was published in PRL too

Emilio Pisanty

7:19 PM

@danielunderwood huh. I was at a conference where they presented that but I missed that session for some reason or other.

I didn't know it was actually published

@danielunderwood ... not in PRL though

gateprep

gateprep
books.google.co.in/…
Pls tell me what operation they did with the ratio of R
Why is R being used here for unite conversion in work..I am not used to such operations at all

Nobody has replied me to the post for last couple of hours

that is why I keep pinging people @ACuriousMind

danielunderwood

7:48 PM

Right phys rev e is not prl. I feel dumb now

Avantgarde

8:46 PM

Please stop pinging people pestering them to answer your questions

For one, the ping sound isn't very appealing

ACuriousMind

@gateprep You don't get to demand from people that they respond to you. If they don't want to reply to your messages, they don't have to. Also, @danielunderwood did actually respond to you, so I find it pretty rude of you to say that no one did.

Anonymous

@Avantgarde FWIW you can mute pings :P

Anonymous

I hate the sound too

Avantgarde

9:02 PM

@Blue FWIW?

Anonymous

FWIW = "For What It's Worth"

Anonymous

Internet abbreviations ;)

Avantgarde

I don't know most of them

Anonymous

They're useful

Anonymous

I also need to learn using Kaomoji's

Anonymous

9:04 PM

I run out of emoji's often

Avantgarde

I prefer using English

Anonymous

Dude, Kaomoji's >> Emoji's :p

Anonymous

kaomoji.ru/en

Avantgarde

Please. no

Anonymous

(｡•́︿•̀｡)

Anonymous

9:06 PM

o(〒﹏〒)o

Anonymous

(╥﹏╥)

Anonymous

You don't appreciate art, not my fault :P

Sir Cumference

9:18 PM

@Blue Oh so that's what they're called?

Anonymous

Indeed

Anonymous

Kao means face in Japanese

Sir Cumference

( ͡° ͜ʖ ͡°)

Anonymous

moji = characters

Sir Cumference

Makes sense

Anonymous

9:21 PM

◖|◔◡◉|◗

Anonymous

They have 100+ alternatives for each emotion, lol

Anonymous

It does take some smartness to come with these

Anonymous

@SirCumference How's life?

Sir Cumference

@Blue Pretty good. Going back to college in 4 days tho :(

Hbu?

Anonymous

@SirCumference Summer holidays?

Anonymous

9:34 PM

@SirCumference Full fledged classes

Anonymous

Quite hectic :/

Avantgarde

@Blue I never really found art exciting enough.

bleh

Anonymous

So umm, for example, that's fine with you?

Sir Cumference

@Blue Those your notes?

Anonymous

9:45 PM

Or a badly typeset LaTeX document?

Anonymous

@SirCumference Nope, Emilio posted it

Avantgarde

I type everything in word.

MS Word!

Anonymous

@Avantgarde Damn, then you really have transcended the humanly emotions (of getting-disgusted-with-bad-typesetting)

Anonymous

Congrats!

Anonymous

On a serious note, I thought MS Word is pretty much obsolete in 2018 as far as typsetting is concerned

Avantgarde

9:47 PM

of course not

I don't think most people in the commerce field know anything beyond word, ppt, etc.

And there are many such people

Anonymous

I mean, well, if you really put in the effort, it is possible to make decent documents with MS Word

Anonymous

But the average documents are quite bad

Avantgarde

Maybe, but I don't think people really bother too much with that.

Which is okay. I would guess the people make a report and then send it to an expert who then beautifies it before it's published in the company's annual report.

I think that the people who work on the report are different from those who beautify it. This is not the case in science.

Anonymous

Well, then they're paying for it to get it professionally typeset :P I would be pretty surprised if the professionals used MS Word for their company's annual report

Avantgarde

We make the report, beautify it, submit it to the journal and then pay the journal to access the paper :P

Anonymous

9:55 PM

@Avantgarde Umm, you're in physics, no? Which journal accepts papers in .doc format?

Avantgarde

Yeah, they're most probably hiring professionals for that. But the initial reports would be made by people who only know word.

@Blue That's not what I meant.

@Blue But I think you can upload papers on arxiv in doc format. I don't know ... I've seen some ugly papers. There is one every week or so.

There was a paper recently whose font was comic sans.

Anonymous

Your submission to the archive must be in one of the following formats (listed in order of preference):

(La)TeX, AMS(La)TeX, PDFLaTeX
PDF
PostScript
HTML with JPEG/PNG/GIF images

Our goal is to store articles in formats which are highly portable and stable over time. Currently, the best choice is TeX/LaTeX, because this open format does not hide information. Note that for this and other reasons we will not accept dvi, PS, or PDF created from TeX/LaTeX source. Users of word processors such as Microsoft Word should save their documents as PDF and submit that. Note also that we will not acce…

Anonymous

So probably those were submitted in PDF format

Anonymous

@Avantgarde Lol

Anonymous

I actually like Comic Sans

Anonymous

9:58 PM

Don't understand the hate

Avantgarde

@Blue Yeah, of course, in pdf format. But edited in Word.

I couldn't read the paper. It was painful to my eyes.

It would be nice if everyone uploaded comic sans papers on April 1. Would be a good joke.

Anonymous

@Avantgarde Do you have the link?

Avantgarde

@Blue Nope, sorry. It was a while ago. I don't remember it anymore.

@Blue Have you read Feynman's paper "Simulating physics with computers"?

Anonymous

@Avantgarde Have heard of it

Anonymous

Did not read

Anonymous

10:07 PM

Why?

Avantgarde

@Blue I read it's one of the papers that pioneered quantum computing.

But I don't know ... I didn't read it in full and I don't know anything about quantum computing.

Anonymous

Well, it's quite a popular paper. Wouldn't be surprised :)

Anonymous

Should prolly read it sometime. Looks short and nice

Anonymous

people.eecs.berkeley.edu/~christos/classics/Feynman.pdf

Avantgarde

@Blue Please read it and tell me what it's about :D

Anonymous

10:11 PM

Heh, okay :P

Avantgarde

I'm serious.

Anonymous

@Avantgarde Iirc, you work in solid-state physics, right?

Avantgarde

@Blue Now what is IIRC?

Anonymous

@Avantgarde I get it. I will let you know when I do read it (but I don't think that'll be anytime soon :P)

Avantgarde

I don't work in solid state physics. That was probably my least favorite subject back then.

Anonymous

10:13 PM

@Avantgarde "If I Remember Correctly"

Anonymous

@Avantgarde Oops, I confused you with someone else

Anonymous

What do you work on though?

Avantgarde

@Blue Yeah sure that's ok. I think it'll be useful for you as well, to know how it all began. Compare it with how things are done today.

@Blue hep-th/gr-qc

Anonymous

Whoa, cool stuff :D

bolbteppa

10:53 PM

Why can't one know everything :(

user 2646

to know-it-all would be to know the thoughts of "god"

danielunderwood

11:16 PM

There's also "Feynman lectures on computation"

not sure how technical it is

vzn

> Therefore some new kind of thinking is necessary, but physicists, being kind of dull minded, only look at nature, and don't know how to think in these new ways. p21

> The program that Fredkin is always pushing, about trying to find a computer
simulation of physics, seem to me to be an excellent program to follow out. p20

bolbteppa

dull minded is great

This is why physics is so good, you can be dull minded and get it

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