The h Bar - 2018-05-18 (page 1 of 3)

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3:59 AM

How is this even stable?

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Blohm & Voss BV 141

@lılostafa my guess would be that the modified tail is key there

hmm, from wikipedia: "At first glance, the placement of weight would have induced tendency to roll, but the weight was evenly supported by lift from the wings. In terms of thrust vs drag asymmetry, the countering of induced yaw was a more complicated matter. At low airspeed, it was calculated to be mostly alleviated because of a phenomenon known as P-factor, while at normal airspeed it proved to be easily controlled with trimming."

4:30 AM

hmm...Interesting design from the 30s

It also says the tail was symmetrical at first

yeah

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a rose by any other name :P

4:47 AM

I have a question ...it's more like meta question

My answer got downvoted and then upvoted.My final reputation was same so can I infer that the person who downvoted me reversed his vote

Dawood ibn Kareem

5:20 AM

Yes.

Removed, rather than reversed.

@Abhinav which question?

Dawood ibn Kareem

5:40 AM

Hello, John, how are you?

@JohnRennie The bottom part of my text is the question...forgot to put question mark XD

Dawood ibn Kareem

John is asking which question received the downvote and the upvote.

@Abhinav If I look at your question I can see the details of how many upvotes and downvotes were cast. That's why i asked for a link to the question.

5:55 AM

2

A: Why couldn't the internal energy depend upon all the three state variables at the same time?

Put simply, because the fundamental assumption of ‘ideal’ gases is that the internal molecules don’t interact with each other. Van der Waals gases/molecules (and other forms of matter) have internal interactions, and those interactions do, in general, depend on how tightly packed the molecules ...

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2 upvotes and no downvotes, so yes someone downvoted then reversed their downvote.

Dawood ibn Kareem

I think By Symmetry's comment under the answer is actually the correct answer.

Your answer, @Abhinav, is a very good answer to an entirely different question.

@JohnRennie Okay

@DawoodibnKareem Yea I got that feeling when I got downvoted

2 hours later…

user228700

8:17 AM

Hello, everyone :-)

user228700

@JohnR: I completed the book in one stretch yesterday!

@KaumudiH hi :-)

@KaumudiH how many hours?

user228700

6 hours, 45 minutes! :-)

@KaumudiH did you do anything while you were listening, or was that just sitting listening to the book?

avidreading.jpeg

8:20 AM

(that's a long time to just sit and listen!)

user228700

No, nothing else. I ate food in the middle, that's all.

I just love it when a book really captures me like that. Books are one of my great pleasures in life (along with food of course :-)

oh audiobook. -4/10

disappointed

@BalarkaSen Don't be a (literary) snob! :-)

I am a very literal snob

user228700

8:22 AM

@JohnRennie Actually, I paused at the 4-hour mark and returned to it after a while, to finish it in another stretch.

user228700

@BalarkaSen Michael Crouch did a wonderful job!

@BalarkaSen audiobooks aren't my thing, but several very well read friends of mine like them. By that I mean friends who know much more about literature than I do.

@KaumudiH you do love reading coming-of-age dramas dont you

I mostly read science fiction, which many would even consider literature :-)

user228700

To be fair, the book was an easy "read", being YA and all.

8:24 AM

THOSE DADGUM KIDS

WITH THEIR HARRY POTTERS

@JohnRennie I have been planning to get into them actually.

@BalarkaSen If you enjoy it do it (though not necessarily in public depending on what it is)

user228700

@BalarkaSen I grew out of the genre entirely, but this one I liked. It was a happy break from other, more "serious" novels I have been trying to finish.

user228700

@JohnRennie :-)

user228700

@BalarkaSen This book was my first, actually, and clearly, I loved the experience! I'd think it works best for some books than others.

user228700

8:27 AM

How were your entrance exams, BTW?

I'm currently reading this. Though I'm finding it a bit disappointing ...

user228700

Hmm, looks interesting-ish...

@KaumudiH They were ok. I enjoyed CMI, but I think I didn't do nearly enough to get in. ISI was much better, let's see what happens.

user228700

Oh, I see...

user228700

I didn't realize that the test is conducted across India!

8:34 AM

Right, can someone help me remember the name of the book that I read some 8 months back?

Worst case I'll end up being an electrician instead of a mathematician. Not too bad.

I need to pick up a book to read. I don't know what though.

user228700

@BalarkaSen x'D An electrician?

sure why not

For reference, see this

user228700

@Sid I have no clue.

8:36 AM

what a soppy story

did the man commit soy sauce at the end

@BalarkaSen truly you are the last of the great romantics

@Sid read science fiction. I have a gold tag badge on the SciFi SE for identifying books!

user228700

I continue to struggle to recollect the name of a book I read 4 years ago. Set in Northern India, its protagonist is a young woman, not yet 20. She runs away from her home to join her grandfather in an ashram, but she is caught by the police, and sent back, etc.

@JohnRennie hahaha

if you post that as an answer to Sid's question i'll personally upvote you

@BalarkaSen No, the man laughed like a maniac and committed suicide instead of going to jail

@Sid that's what i said.

the man committed soy sauce

8:41 AM

Oh, "Soy Sauce". lol.

@KaumudiH I guess 6 hours is a lot of time to invest in any one thing when it's exam season. But maybe once term ends you'll have more time free.

You know what I should read Nabokov

@BalarkaSen Why is it that you young people think torturing yourself is good?

You don't like him? :)

I suppose it's like climbing Everest, except that Nabokov is less likely to kill you

8:53 AM

You said that the same thing for Joyce and Eliott!

James Joyce!!!!!

(Maybe you didn't add the last bit; indeed Finnegans Wake is more likely to kill me than climbing Everest)

Of Eliot's work I only know The Wasteland and I have to admit the language is beautiful, even though most of the time I have absolutely no idea what it means.

:)

I'm interested in Nabokov because he's had a long time beef with Dostoyevsky

Famously he said "Crime and Punishment" was both a crime and a punishment to the reader.

a punishment to the reader - that applies to many books :-)

The feeling you get when you finish a book is supposed to be awe not relief.

9:01 AM

True.

I should start reading some Agatha Christie books. Any suggestions?

@Sid Murder on the Orient Express ?

boo

BOO

That's probably the most famous

@BalarkaSen :-)

@Sid if you like whodunnits read the Inspector Morse books. They are genuinely good.

Good point. Lemme search if they are available for free on the Internet

9:14 AM

@JohnRennie Is it on Morse theory

real ones only read Sherlock Holmes because any other detective fiction is s u c c

@BalarkaSen I have completed Sherlock Holmes already.

then read Inspector Dupin

the original Sherlock Holmes

realer ones read the Poe boy

Novalium Company

Sup guys.

@Sid I have some of the books if you want to borrow them.

9:19 AM

Like, ebooks?

EPUB format

Novalium Company

I love ebooks, pdf format.

@JohnRennie Yeah sure.

@NovaliumCompany I pretty much only read ebooks these days, on my tablet. But I find pdf is rather inflexible and prefer EPUB or MOBI.

Novalium Company

@JohnRennie Me too, I prefer ebooks, but In my opinion pdf can be just downloaded and read, without any external software. btw I read them on my tablet too :D

9:24 AM

@Sid have you got a Facebook account, or an e-mail address?

Got it if you want to delete that

@Sid you have mail

Yup. Thanks!

@Sid incidentally, one of the cool things about epubs is that it's easy to change the formatting to suit your own tastes. For example I like a black line between paragraphs but most ebooks aren't formatted that way.

An epub is just a zip file renamed from .zip to .epub. You can unzip it, hand edit the CSS to give whatevere formating you like, then zip it up again and rename it back to .epub.

Novalium Company

9:47 AM

Time for school, see you later guys :)

cya pal

doo doo doo

daa daa daa

da be dee da ba dae

user228700

10:16 AM

@JohnR: Are you around? (Please be, please be...)

@KaumudiH yes, what's up? Sounds serious.

user228700

No, it's not, haha. Hangouts?

Dawood ibn Kareem

10:40 AM

@KaumudiH Hello!

10:53 AM

I'm going to listen to the classic drone metal album Earth 2

By the end of it I'm going to transform into a blood thirsty Dracula probably

Dawood ibn Kareem

11:19 AM

Will we need garlic?

My ear's breaking so I am not actually going to listen to this in full

I tried

Dawood ibn Kareem

The dies irae from Mozart's requiem should clear it out.

So long as you play it at least as loud.

Let's hear it

I'm a noob at classical music, I should listen to it more

This is pretty good!

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what is amazon trying to tell me

You're into Satanic shite bro

Dawood ibn Kareem

11:33 AM

@BalarkaSen There are loads of versions of it on YouTube. I like this one - youtube.com/watch?v=nQh0c0wJtwo The dies irae starts about 26 seconds in. (I don't know why they put the last 26 seconds of the kyrie eleison on the same clip).

the devil's greatest trick was convincing the world to use geometric measure theory

@DawoodibnKareem Powerful conduction

Dawood ibn Kareem

Karajan is pretty awesome.

Also flipping hilarious how every video of this section has a comment which goes like "Here from [some bad action movie nobody knows]"

Dawood ibn Kareem

@Slereah What on earth is that thing with the piratey looking ship?

11:40 AM

@DawoodibnKareem That is Spivak

Dawood ibn Kareem

Ah. An introduction that takes five volumes.

on the other hand

the covers are magical

Dawood ibn Kareem

Sure. I'd buy all five just for the covers.

user image

just think of it as investing in art

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Dawood ibn Kareem

Right. I now have names for my next three pigeons.

11:49 AM

@DawoodibnKareem So what kind of music are you into, other than classical?

Dawood ibn Kareem

Hah, I'm really not.

Exclusively classical? :) Interesting.

The follow-up question would be if you're exclusively baroque :)

Dawood ibn Kareem

No, I mean, I can't usually be bothered with any kind of music at all.

Oh I see.

Dawood ibn Kareem

When I lived downstairs from people who were playing heavy metal loudly at all hours of the day and night, I bought a large stereo system and a CD of Mozart's requiem, and retaliated appropriately.

11:52 AM

Hahahah

I'd have chosen something like Merzbow over Mozart as retaliation music but that'd probably result in my death as well as theirs.

Dawood ibn Kareem

Haha, for me, YouTube introduced that with an ad for chainsaws. Oddly appropriate.

lmao

even the mere mention of the word "chainsaw" still sends shivers down my spine; i think i've been permanently psychologically scared by the movie "the texas chainsaw massacre"

Dawood ibn Kareem

12:19 PM

I like the way the number looks like part of the sentence. I read "10 Inappropriate conversations have been tolerated here in the past ..." and I think "is that all?"

lololol

here, i'll add one; for your viewing pleasure :P

better?

Over 9000 inappropriate conversations have been tolerated here

Can the Lagrangian ever be a dimensionless constant. I dont think so, because if it were then it would lead to a breakdown of Galilean relativity

12:43 PM

can we get 9000 stars on that?

1:00 PM

@Albas what do you mean by "a dimensionless constant"? The Lagrangian is defined in units of energy

Future Historian

So.......

Say the Lagrangian is just a constant c, not necessarily dimensionless or having a dimension@Jim. That was a mistake on my part

Future Historian

Question: if you had to pick an alternate timeline to live in, which one would it be?

@FutureHistorian How can I decide without knowing all of my options?

@Albas well, then there's not going to be any motion

In any inertial frame

Future Historian

1:07 PM

Well here are five options:

1. Space Race is extended towards Mars, combined with space militarisation being ramped up to 11.
2. Nazis win WWII, but their victory is short-lived.
3. Trotsky is the successor to Lenin instead of Stalin, like he was supposed to be.
4. No Sikes-Picot Agreement results in a united Arab nation.
5. 1st Century CE Industrial Revolution after the aeolipile sees practical use as a steam engine.

Take your pick.

@Jim? Well?

@Albas just take a look through lagrangian mechanics and replace the lagrangian with a constant in all the equations. Lots of things simplify or go to zero. And the equations of motion all depend on the derivative of the lagrangian

Future Historian

Which of those timelines would you take?

@FutureHistorian I'm tempted to say (2), but I think I have to go with (5)

@Jim Yes the thing that I wanted to see was why does the Lagrangian have to depend on $q^(.)$.

Future Historian

So.....

Industrial Revolution in the 1st Century due to the aeolipile?

1:10 PM

yup

Future Historian

Now....I am curious as to how such a timeline would look like.

As in: how convoluted is that alternate 21st Century CE?

either everyone is dead or we have more advanced tech

Future Historian

After all: Rome is either going to collapse faster, because of the Empire's inability to cope with the ensuing technological disruption OR Rome would survive longer than in our timeline.

Which is more likely a scenario in that timeline of for the recently formed Roman Empire?

plus with the americas not being discovered yet, there would be a lot more advanced tech for the wars over new land

and more time for rapid communication between china and rome

@Albas it doesn't, but it's only interesting when it does

Future Historian

I know I am probably going to regret this, even though this should be hilarious but......

(as Trump) China, China CHINA!

And yes, I am on meme mode today.

:P

@Jim. So.....that being said....can Rome survive in this timeline?

1:14 PM

@Jim True.

Future Historian

At least longer than it did in our timeline?

Or would the early Industrial Revolution likely accelerate the collapse of Rome?

@FutureHistorian depends on the political changes that may or may not accompany the technological ones. If they stayed as a quasi autocratic-democratic state, I'd go with accelerated collapse. Also, if they didn't share the industrial tech with anyone else (good luck with that), they could dominate for a good long time

Future Historian

Well, actually......

Some try to preserve the status quo.

Others want change in the Empire.

A sort of...restoration of the Republic.

But Rome is too small geographically to maintain control forever and regions of vastly different climate tend to want to be independent. So you'll probably find that whichever region has more resources in a developed area will dominate later on

It seems that this chat is a little more relaxed than the maths chat, I dont see much physics.

Future Historian

1:18 PM

So, could it be possible that Rome could have a bit of a civil war between neo-Republicans and the Imperial government?

Oh and also various breakaway groups that want to become NOT Roman.

@Albas sometimes it's heavy in physics and math, sometimes not. Physics is often more in tune with the real world than math

Future Historian

^

@FutureHistorian it could be possible that Ghandi rises as an evil dictator. With such a huge change so early, you name it and it's possible

Ahh yes, but an axiomatic basis (not an complete system of axioms) wouldn't hurt anyone

Future Historian

Remember: that assumes Ghandi even exists.

And that is one hilarious Civilization reference by the way.

snickers

1:22 PM

@FutureHistorian yes, which is unlikely

Future Historian

pictures nuclear Ghandi in this timeline

So, that makes perfect sense.

Rome implodes more violently in this timeline as those attempting to restore the Republic are trying to fight the Empire, and then there are the locals that want sovereignty.

And other rival civilisations in the area.

@FutureHistorian And then, of course, Rome builds a death star to quash the rebellion and to allow them to eliminate the last remnants of the republic

3 hours later…

4:20 PM

@Albas constants are perfectly galilean invariant

But of course it's not a very interesting theory

It's just a system of 0 bodies

Also if the Lagrangian is just a constant, it's equivalent to the zero lagrangian

Since constants are total derivatives

shocking

4:46 PM

@enumaris so do you have some interest in cosmic censorship problem? have a wild idea just gotta share it with somebody, think its a very solid/ promising/ ingenious lead on the problem, still looking for a really imaginative/ openminded phd somewhere :P o_O

Do you actually know GR

I don't think it's a very good idea to muse on cosmic censorship otherwise

@Slereah lol does anyone really know GR? :P

Yes, quite a few people

@Slereah its a broad/ vast subj these days. full of specializations. some mathematicians, some physicists. some both. etc

Well do you know any of it

4

4:49 PM

@Slereah )(

@vzn you're basically saying nobody can say they know something unless that thing is really well defined and they know every single part of it.

@vzn So that's a no then?

8

@Droleulb ppl really put words in others mouths a lot around here. its ok for you to extrapolate my words, but as basic human courtesy, plz be clear to yourself/ others when youre doing it.

@vzn also your definition of open minded is "agrees/listens to vzn"

@JohnRennie there are a lot of very well informed ppl around here on GR. but sometimes thats just not enough :P

4:52 PM

@vzn So that's a no then?

8

@Droleulb listening/ agreement are not the same thing although the english words tend to have a similar connotation.

yeah that's why i said both.

if they had the same connotation there would be no point of using both.

this now reminds me of some (favorite) quotes on my blog.

what's cookin'

@vzn I only have a passing understanding of the issue, my GR understanding is not deep enough to really explore the issue that deeply

5:04 PM

@BalarkaSen If you're asking what is being grilled, the answer would be vzn :-)

@enumaris lol ok but youre a physics phd, dont be afraid :P

I see some vzn roasting is happening

my field wasn't related to GR, GR was only a personal interest

@JohnRennie doesnt sound nice to me :(

If you can't stand the heat...

5:05 PM

although tbh, I know about as much about my own field as I do about GR...lol

@enumaris lol same here, hopefully not a crime around here! :P o_O

Really @vzn, if you didn't engage in some mainstream scientific conspiracy of closed-mindednes it'd be genuinely interesting to converse with you

hmmm

@BalarkaSen we have indeed conversed many times over the yrs, to varying degrees of (dis)connection, was thinking recently possibly even nearly as soon as you joined SE...

this is starting to sound like a script from a play

5:10 PM

a very strong drama

too stronk

a thonking memer's play

@vzn Yes, but my complaint stands on all of those conversations. The disdain for the scientific process of understanding without engaging in it constructively and dismissing it as closed-minded is always the tiresome factor.

@Droleulb lol interesting! reminds me of this and another physics book written in same style on QM mysteries by major author, trying to remember it (not near my shelf...) en.wikipedia.org/wiki/… (maybe youd like role of Simplicio) :P

oh burn

i read that book btw like 7 years ago

rekt

5:17 PM

@Droleulb ah! found it with some googling, did you like the galileo dialogue? if so you might like this, am now thinking need to read it sooner rather than later... Are quanta real/ Jauch en.wikipedia.org/wiki/Are_Quanta_Real_(book)

Oh, speaking of scientific plays

Die Physiker by Durrenmatt is flipping fantastic

It broke my mind when I listened to a radio enactment of it

link radio

Let's see if I can find it online

amazon.com/Physiker-English-German-Friedrich-Durrenmatt/dp/…

It's in German so I have to find an English act

Nope can't seem to find one. I had an audio file once but it's probably lost

5:24 PM

@BalarkaSen a dramatic yet unfair/ baseless accusation :(

It's not an accusation, it's the impression most of us gets from you. I laid it out constructively as a criticism, if you don't want to accept it, feel free to be an object of ridicule by those who has better things to do with their time.

@BalarkaSen (will not entirely reject your premise however...) theres some scapegoating going on.

@vzn unfairness/ baselessness are not the same thing yet the english words tend to have similar connotation.

:'(

lol geez its friday why is everyone in a bad mood o_O :o

I ain't

I've run out of ideas on how to upgrade my NLP pipeline at the moment tho, so I'm thinking about

it

5:34 PM

i am, but for reasons entirely unrelated to this conversation

somehow 1-2 business days yesterday turned into 3 business days today

for what

some grad student services stuff which had slipped under the radar

it's not a big deal, I think, it's just annoying

didn't u defend

what grad student services u still need...

graduation?

The physics department knows I defended.

Grad student services, however, doesn't

Bureaucracy never makes a lot of sense

I guess you could say you're...

Semidoctorate

5:37 PM

bureacracy, rhymes with aieee :P o_O

...lol

my personal acronym is ABP

all but paperwork

@Semiclassical congratulations! are you certified? when was your defense?

was that not funny

defense was tuesday. I got approval from my committee, but there were some mistakes in the process leading up to this so there's some additional hurdles to go through

where's my star

4

5:39 PM

i'm not worried about it, just annoyed

really funny astronomer

@Semiclassical do something (with friends/ cohorts) to celebrate!

yeah

@Semiclassical re that + a topic in here, do you like alcohol? :P

don't mind it, but i'm not more than an occasional drinker

5:44 PM

I feel like my defense was super easy...my committee didn't really ask me many questions...

spoken like a true non-alcoholic

@enumaris maybe a sign that you already did a good job & clearly knew what you were talking about :)

maybe XD

@enumaris / semi reminds of this, found it yrs ago somewhere... the snake fight portion of your thesis defense mcsweeneys.net/articles/…

webpage blocked lol

5:53 PM

@enumaris check it out, also defn reminds me of this room/ crowd sometimes :P

can't view it

@enumaris yeah, later. so have you read about cosmic censorship over the yrs? did anyone in your dept study it? heard about it at confs? etc? (?)

Come back after a long old while, see the chat room got timed out and people have been chastised without a reference to what it was. Moderation seems to have gone from bad to worse RIP I don't see why our friendly room mods weren't enough

feelsbadman

tl;dr 0celo7 got banned for a year.

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