The h Bar

6:00 PM

@Mithrandir who gave power to theses careless people then?who Don’t want to complete one task to full .

Hello everybody! We know that the derivative will give us the rate of change or something at a specific point in time. (e.g instantaneous acceleration...) but what will the integral tell us? I'm trying to understand it and somehow relate it. I know that $a = \frac{dv}{dt}$, meaning, we can get the acceleration at any point in time, but what about integrals, how can I translate them into meaningful words?

coniferous_smellerULPBG-W8ZgjR

quick poll. what's your web browser(s)? I begin : firefox

Anonymous

@coniferous_smellerULPBG-W8ZgjR Chromium/Firefox/Chrome

enumaris

Integrals are areas under curves

ACuriousMind

@coniferous_smellerULPBG-W8ZgjR I parse the html in my head.

enumaris

6:03 PM

@vo

@NovaliumCompany if you integrate the velocity for example, from some time to some other time, you will find the total distance traveled during that time period

coniferous_smellerULPBG-W8ZgjR

@ACuriousMind lynk?

or some command line web browser

Novalium Company

@enumaris So it's kinda like finding the whole from the parts? Some sort of like weird multiplication :D

ACuriousMind

@NovaliumCompany If the function you're integrating is a rate of change (like the velocity is a rate of change of position), the integral over some period of time gives you the total change during that time, in the case of velocity the total distance travelled.

coniferous_smellerULPBG-W8ZgjR

btw modern websites are full of css and the like i guess. html can't decipher everything i guess

enumaris

@NovaliumCompany yeah, basically

Anonymous

6:05 PM

BTW this is an excellent quick-reference PDF for heavy RevTex users.

Anonymous

I had almost forgotten about it

enumaris

it's a sum of a bunch of multiplications (i.e. the Riemann Sum)

Novalium Company

Cool, and how about when we integrate acceleration? I'll give us the velocity I suppose for some time period, but that is the averaged velocity in that time period I guess?

enumaris

It will give the total change in velocity over that time period

ACuriousMind

@NovaliumCompany No, it's the total change in velocity over that time.

enumaris

6:07 PM

@ACuriousMind jinx?

ACuriousMind

@enumaris jinx.

Novalium Company

Hmm, I think I get it. That's why when integrating velocity, we get the change in distance, not the averaged distance :D

enumaris

yep

Novalium Company

Ok guys, thanks. I'mma go take a shower now :-)

Anonymous

Take a bucket bath instead

Anonymous

6:10 PM

Showers are for normies

Mithrandir

→ 41 messages moved to Trashcan

Fawad

Bucket and lotha

Anonymous

Yep ^

Emilio Pisanty

@Blue that's hardly the worst part of revtex.

Anonymous

@EmilioPisanty So, what's your favorite worst part? :P

Emilio Pisanty

6:21 PM

Trumped by a mile by the incompatibility with anything that isn't natbib over bibtex

Anonymous

@EmilioPisanty I see. I never used anything other than natbib. BTW you must have seen this?

Emilio Pisanty

@Blue looks pretty useless to me

I see no point in investing in learning biblatex until it's supported by revtex

Half my output goes to aps and it must go on revtex, therefore must go on bibtex, therefore I can't drop bibtex

There's no point in fragmenting my bibliography handling

Plus, I'm reasonably happy with my current workflow and style file

I wouldn't say no to a platform that was more robust and more flexible, but not at the price of needing to stay current with two systems.

coniferous_smellerULPBG-W8ZgjR

6:46 PM

why do journals want .eps figures while pdf is better

Anonymous

@coniferous_smellerULPBG-W8ZgjR Most don't...

Anonymous

Nowadays PDF is the more preferred format

coniferous_smellerULPBG-W8ZgjR

wow nice

Anonymous

Read the author guidelines of the journals

Anonymous

They usually give the details there

Anonymous

6:48 PM

About which formats they accept

coniferous_smellerULPBG-W8ZgjR

this is what ive done ^^ and they wanted eps, but that was for a single journal

Anonymous

Many even accept .png images

Anonymous

@coniferous_smellerULPBG-W8ZgjR Which journal?

coniferous_smellerULPBG-W8ZgjR

well yes when you take a picture of your lab setup.... what else could it be? .raw?

review of scientific instruments

as far as I know , they want .eps, no pdf for figures

so I'm fine for png file as long as it's not for plots, but for photographs

Anonymous

Yeah, for photographs .png works well enough

coniferous_smellerULPBG-W8ZgjR

6:51 PM

i also found no easy way to share programming code

post to github which may die, does not look a good idea to me

Anonymous

34

Q: Is the PNG file format acceptable for academic papers?

When I have to use Microsoft Word for writing a paper, I tend to export most my graphs and charts into the PNG image format since I find it the most convenient due to its smaller size (than TIFF) and higher quality (than JPEG). However, when I wanted to submit papers for conferences, none of the...

Anonymous

@coniferous_smellerULPBG-W8ZgjR "which may die"...the open source guy in you is showing ;)

coniferous_smellerULPBG-W8ZgjR

not really. same for gitlab i suppose

Anonymous

54

A: Which figure type to use: pdf or eps?

Use PDF. EPS cannot be imported directly by pdftex but must be converted using something like epstopdf. These conversion procedures will often cause unwanted changes to the graphics, such as lossy JPEG encoding of embedded bitmap images. Pdftex will include PDF files directly without making any c...

Anonymous

Oh, and this ^

Anonymous

6:54 PM

PDF>EPS

Anonymous

(So your journal is clearly an exception!)

coniferous_smellerULPBG-W8ZgjR

haha my journal! I wish!!!

Anonymous

Lol

coniferous_smellerULPBG-W8ZgjR

and yyeah I had seen that post a few months ago

Anonymous

You're an undergrad, right?

Anonymous

6:56 PM

Material physics?

coniferous_smellerULPBG-W8ZgjR

which made me wonder the question I posted here ^^

i'd prefer not to reveal too much on me ^ thanks :D

Anonymous

Oh, okaies

Anonymous

I remember

Semiclassical

Oh man, today’s SMBC is great

smbc-comics.com/comic/we-are-here

Anonymous

"If anything, we know for sure that biologists aren't gonna be the first ones to be able to debunk the creationists" - might work for an applied physics/chemistry dept ;)

coniferous_smellerULPBG-W8ZgjR

7:06 PM

im too lazy man but i'd love to change my profile pic to a big sketched nose smelling a coniferous

looks like there's 0 website providing a software that would merge 2 pics into 1

i dont want side by side, i want them mixed altogether

Anonymous

There are tons of photo editors which can do that

coniferous_smellerULPBG-W8ZgjR

yeah but online ones?

Anonymous

Online ones would be crappy mostly

danielunderwood

gimp!

coniferous_smellerULPBG-W8ZgjR

i dont really care ^^ but ill check this out, thanks

yaeh i have gimp and imagemagick

Anonymous

7:14 PM

Anonymous

Reminds me that I need to reproduce this image ^

Anonymous

(from a textbook)

Anonymous

Not sure what the most efficient way would be

Anonymous

I could use Google Draw but it doesn't support LaTeX labels

Anonymous

I could somehow trick gnuplot into generating something like that, but that doesn't seem very efficient either

Anonymous

7:16 PM

Any ideas?

danielunderwood

matplotlib or something would be pretty easy if you knew the functional form

The dotted one seems like it may be a bit tricky though

Anonymous

Does matplotlib support latex labels?

Anonymous

@danielunderwood Yeah :/

danielunderwood

if you ask it very nicely

I remember there being a way, but I don't remember exactly how

Anonymous

@danielunderwood Well, I don't know the functional form...but something at least resembling that graph would be nice

enumaris

7:21 PM

you can just type $$

it will render it as latex

Anonymous

Cool. I think I can do the LaTeX thing in Gnuplot too. The difficult part would be to create the shape

enumaris

like plt.xlabel('$\mu$') should work

danielunderwood

Maybe it's a Gaussian with a smaller amplitude gaussian off to the right?

Or just create a gaussian and keep poking it with other gaussians until you're happy lol

"Gaussian series"

Anonymous

Gaussian will do I think

Anonymous

But the other one

Anonymous

7:23 PM

The S shaped one

danielunderwood

sigmoid or tanh

yay ml

Anonymous

Sigmoid...ah

Anonymous

I forget that name

danielunderwood

or logistic because someone lost their mind

Anonymous

Well, I need to shift up the centre of the sigmoid by a bit

danielunderwood

7:25 PM

it's an exercise left for the reader

couldn't you just shift the whole thing to the left?

coniferous_smellerULPBG-W8ZgjR

yes matplotlib supports latex labels

2 ways for that. the matlotlib way and another more experimental way using matplot2tikz

the latter uses matplotlib syntax to create a picture using tikz, so in the end it's 100% latex

from the labels up to the curves themselves

21

Q: Matplotlib's PGF vs Matplotlib2Tikz

I want to generate some plots to be integrated into a LaTeX document compiled with pdflatex. I also want the plot font (legend, title ...) to follow the settings of the LaTeX document. My search so far gave 2 possibilites: using the PGF backend in matplotlib to save raw plot data and then input...

tikz-pgf pgfplots python matplotlib

Anonymous

Hmm, somewhat getting the look

Anonymous

Gotta flatten the Gaussian now

Anonymous

Cool, gnuplot will suffice it seems :P Gotta use the epslatex terminal

Semiclassical

7:35 PM

looks like a pdf and a cdf

Anonymous

Semiclassical

haaaah

which book is that?

Anonymous

Well, this is the whole thing ^ :)

Anonymous

@Semiclassical Stauffer : Intro to PT

Semiclassical

PT= Percolation theory?

Anonymous

7:37 PM

Yep

Semiclassical

(PT = Phase transitions would have made sense in this context as well)

Anonymous

The functional form of $\Pi$ is given

Anonymous

But the exponent is not fixed

Anonymous

@Semiclassical Hehe, sorta the same thing (well, one is a subset of the other) :P

Semiclassical

7:39 PM

right

I remember doing some percolation theory hw problems in my grad solid state course but

too long ago for me to remember anything useful :P

Anonymous

Heh, as far as its applications in physics are concerned, percolation theory is more or less simple. The real difficulty shows up when we try to prove the existing conjectures (there are 100s of them). Random matrix stuff goes over my head most of the time

Anonymous

I guess the statisticians would be more equipped to handle such problems

Novalium Company

8:11 PM

Hmm, putting a wire with current in a magnetic field would cause the wire to experience a force with direction determined by the Lorentz right hand rule, is that correct?

coniferous_smellerULPBG-W8ZgjR

can you get the stat of the ratio of upvotes/downvotes once you reach 25k points

for a particular person

enumaris

8:34 PM

@NovaliumCompany the right hand rule is separate from the Lorentz force law. It will experience a force described by the Lorentz force law. Proper application of the Lorentz force law involves using the right hand rule to determine the direction of the force.

Semiclassical

@Blue formulating conjectures in percolation theory: easy

proving them: very hard

danielunderwood

Does SE automatically put newer answers first if there isn't an accepted one? I just saw stackoverflow.com/questions/7751555/… and it's kind of sad

Novalium Company

@enumaris Hmm, got it. Putting a wire with current in a magnetic field somehow never came up on my todo list as a kid. Oops, phone battery at 6%.

danielunderwood

..I think git should have its own SE site

Anonymous

@danielunderwood Start an Area51 proposal!

Anonymous

8:46 PM

(They might close it as "narrow scope"...but worth a try)

David Z

@danielunderwood Depends on what answer ordering you choose. The default is to order by votes in descending order.

danielunderwood

wow I'm a fool

I've never noticed those tabs in all my time on SE

Anonymous

stackoverflow.com/jobs/salary

danielunderwood

something something discussion about not seeing banners

Anonymous

This is a nice tool, hmm

danielunderwood

8:54 PM

oh man look at the banner on this ad stackoverflow.com/jobs/200052/…

Anonymous

"You might find yourself contributing to our platform if you…

Read and prototype machine learning research for fun
Have a breadth of knowledge in machine learning, mathematics, computer science, and statistics
Read graduate level mathematics books by the pool
"

Anonymous

This part ^

Anonymous

?

Anonymous

I'm not sure which banner you are referring to :P

danielunderwood

no no the image

Anonymous

8:56 PM

Ah, looks nice

danielunderwood

Though I'll admit that the "books by the pool" thing was meaning pool as a volume and I was a bit confused

Anonymous

Lol, same here

Anonymous

"in the pool" would be funnier tho ;)

Anonymous

Looks like a good job btw

Anonymous

Benefits

Unlimited Vacation
Company paid Medical Insurance for Employees and Dependents

Anonymous

9:00 PM

Whoa. "Unlimited Vacation"...that's something XD

danielunderwood

My current job has "unlimited vacation" but it comes at the cost of occasional weeks full of 15 hour days

David Z

@Blue Have you heard about that being a recent trend in tech?

Anonymous

@DavidZ Nope, I don't keep up with the news much :P

Anonymous

Is it ?

Anonymous

Sounds like a perfect scam

Anonymous

9:03 PM

@danielunderwood Was expecting that XD

Anonymous

@danielunderwood Do they allow you to work remotely ?

David Z

Kind of, yeah. It's probably more accurate to describe it as unrestricted vacation time - basically the company decides to trust its employees to take days off whenever they need to without having to stick to a fixed limit.

Ironically it often winds up in people taking less vacation time than under more traditional plans.

Tech workers can be a little obsessed ;)

(obsessive?)

danielunderwood

Yeah I work from home most of the time. Though that also means my hours are pretty erratic when things need to get done and I don't get to talk to coworkers much

Anonymous

Haha. That can be a good thing sometimes. Not everyone likes a long stretch of summer vacation or something like that. I'd prefer 2 workdays followed by a 1 day gap!

danielunderwood

But it also means I don't sit in traffic every morning!

Anonymous

9:06 PM

@danielunderwood That's actually cool....!

Anonymous

I need to look for something like that :P

David Z

I just deal with that by going to work at noon :P

Anonymous

I'd go at midnight if possible :)

Anonymous

(My most productive time)

David Z

At some places you could get away with that

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