The h Bar

bolbteppa

00:15

@Semiclassical given how insane they are, it's surprising 99% of people don't see this as valid logic :p

Semiclassical

@bolbteppa yeah, i don't get it

bolbteppa

The closeness of Florida is simply a mystery

enumaris

some poll results should be in

still too early tho

but

I'm nervous XD

bolbteppa

Hopefully the obvious lessons about running as centrists will be learned tonight :o

user600999

00:31

Hi there. I was wondering if someone could tell me what the trace means here for this character of a $\hat{U}(1)$ representation $L_\alpha$:
$$\chi_{L_\alpha}(q,z)=Tr(q^{L_0-\frac{c}{24}}z^{a_0})$$

Do the operators $L_0,a_0$ that are in the exponent give $z^{a_0}$ and $q^{L_0-\frac{c}{24}}$ a well defined action, where $a_0\cdot |\alpha\rangle = \alpha|\alpha\rangle$ we let $z^{a_0}\cdot|\alpha\rangle = z^{\alpha}|\alpha\rangle$?

vzn

in theory salon, 8 hours ago, by vzn

Google has enlisted NASA to help it prove quantum supremacy within months / MIT tech review

enumaris

early in 10-4 red vs blue in the House dun dun dunnnnnnn

(all holds)

bolbteppa

01:01

'Kim Davis lost to the guy she denied a marriage license to'

Semiclassical

@bolbteppa that's great

right now Beto is leading over Cruz in Texas

(with 13% reporting, so not much stock to put in that)

bolbteppa

Yeah

Florida is insane as usual

Semiclassical

ya rly

ugh florida

lılostafa

01:17

Fla. 60% reported and still 50-50 wtf

(btw why the hell am I following the results at 5am, I dont know)

Semiclassical

lol

bolbteppa

01:31

The closeness of these races is the most jarring thing to me, how...

Semiclassical

it's not surprising to me, but it's hardly comfortable

lılostafa

damn Ted Cruz is finally ahead

Semiclassical

ah, really? nuts

lılostafa

01:52

Jesus christ

Beto again leading by 3.6 points

Semiclassical

lol

lılostafa

02:15

nytimes.com/interactive/2018/11/06/us/elections/…

"We do not yet feel confident enough in our estimates to publish a live forecast. If and when we do, we will publish it here. "

(1.5 hour after the time they originally intended to begin)

lılostafa

02:45

Texas senate results have officially entered the chaotic phase

bolbteppa

How can people support this insanity, it's unbelievable

lılostafa

Sir Cumference

@lılostafa heh

wait are you a texan?

bolbteppa

03:14

Beto loses

Semiclassical

yeah

not a big surprise and not a big disappointment, but still

enumaris

Seems like the blue wave ain't happening

enumaris

03:52

Aiya

danielunderwood

04:03

Well the House is something I suppose

Aaron Stevens

It's still so close lol

rob

04:34

Sigh ... every candidate I voted for lost.

Aaron Stevens

I guess you didn't vote hard enough

rob

I voted early, but not often.

Aaron Stevens

Did you check to make sure you didn't fill out an anti-ballot?

danielunderwood

Wow my local elections were around 80/20 in favor of republicans

Aaron Stevens

04:57

Why wow?

John Rennie

05:17

@Avantgarde yes, I only made it to use up some left over chicken that needed using before it went off. However it was very nice. But then anything is nice if you put enough cream in it :-)

Semiclassical

05:44

lol, one of the local house districts here is showing on NYtimes with 130,091 votes to 130,070

i'm sure that'll change, but that's about as narrow a margin as you get

okay, now it's up to a 92 vote difference. truly a tectonic shift

John Rennie

06:32

0

Q: Curvature in space time during Bing Bang and present scenerio

Space time in the presence of masses is curved.But during the time of Big Bang its presumed that all the matter in this universe was at a single point,so it must have been super dense and had very high mass.So space time at that point would have curved very deep down but today its almost flat.How...

The Bing Bang :-)

Avantgarde

06:59

@JohnRennie Yeah, cream's nice.

Avantgarde

08:24

Anyone else having issues opening some arxiv submissions today?

Secret

09:20

It has been a long time when midterms were that intetesting

looks like someone will finally get the dangerous side of Trump in check

Perhaps we might be seeing a socialist wave coming in the 2020 election, and socialism will be subjected to its final test which either it succeed, or it will be forgotten forever

but what is personally important to me is that with the current state of the Congress, the world is finally avenging the 44 people who ghosted me in the past. With the joint interaction of Democrats and Republicans to shake up politics like never before, the generalisation of ghosting, that is every single injustice that humanity is capable of, is now set on its course to be erased from existence by 2025

Vzn: This, is The Plan you constantly heard me ramble about. 10 years of preparation, just to shape the world just right so that ghosting will never ever be possible within humanity

::secret is so satisfied that the US midterm is in accordance to The Plan::

Secret

09:37

ok that is too much rambling. Here's a link that showed what exactly it means for the midterm results:

theguardian.com/us-news/2018/nov/06/…

Basically:

The wall will probably still be built, but medical policies will be resisted by democrats

Alao, get ready for Trump getting mired in investigation stuffs and more conservative judges

Captain Bohemian

10:30

I saw someone on SE asked about the funding source of UK PhD for non-EU students. It's very strange that UK only funds EU students.

the living expense in UK is exorbitant for most people from non-EU countries, so how could they afford it?

In contrast, if a country whose living expense is very cheap for most people outside its land only funds students from its land, I would feel that's reasonable.

Anonymous

@CaptainBohemian Well, on the other hand, they only have limited fundings to offer. Brexit might change things a bit though

Anonymous

Non-EU PhD in the UK students manage to get academic scholarships from other sources, from what I've heard

Captain Bohemian

@Blue What's Brexit?

Anonymous

Brexit

Brexit ( or ), short portmanteau of "British exit from the European Union", is the impending withdrawal of the United Kingdom from the European Union (EU). It follows from the referendum of 23 June 2016 when a majority of 52% of British voters supported leaving the EU. On 29 March 2017, the UK government invoked Article 50 of the Treaty on European Union. The United Kingdom is due to leave the EU on 29 March 2019 at 11 p.m. UK time, when the period for negotiating a withdrawal agreement will end unless an extension is agreed.The UK had joined the European Communities (EC) in 1973, with membership...

Anonymous

10:45

However, the top universities like Oxbridge usually have a lot more scholarships opportunities to offer

Anonymous

So if you're applying to one of those places there's not much to worry. Non-funded PhD's are pretty rare anywhere in the world

Captain Bohemian

I think the living cost on my land is very cheap for most people from overseas, so if our government announces it only funds people on our land, it should be very reasonable. But it doesn't practice that. We have international graduate student programs which fund a lot of foreign PhD students. I have met people from Costa Rica, Mongo, Russia, and India who studied by the funding of those programs in my previous institute. Nevertheless, no funded research themes in those programs interest me.

Anonymous

Yeah. On the contrary, the livings costs in the UK are apparently a lot higher. And in turn education can be expensive

Anonymous

Germany and France are however managing it very well

Anonymous

Their governments invest a lot in public education

Anonymous

10:59

Masters and PhD programs are almost free in most German public universities for example

Anonymous

Hmmm, btw I don't much idea about the Scandinavian countries....

Anonymous

I guess their research potentials might be a bit hindered due to lack of population and connections

Captain Bohemian

@Blue they also treat PhD students as employees as I checked recently.

Anonymous

@CaptainBohemian That's true. But they also expect a masters degree from you beforehand

Anonymous

In EU afaik the PhD topics are decided beforehand

Anonymous

11:07

It's more like "you need to help us complete this specific research project" rather than "we'll train you to become an expert in topics X, Y and Z" if I understand correctly

Captain Bohemian

@Blue getting master degrees get easier and easier. My alma mater even considers practicing non-thesis master program. I think only taking courses to get a degree is very easy if there is funding.

working on a thesis to get a degree is more subtle because it depends on your supervisor.

Anonymous

I honestly loved the idea of a MRes program like in Imperial

Anonymous

But those programs seem to be very rare and are usually not in the subjects I prefer

Emilio Pisanty

@CaptainBohemian They can't. It's by design. It's a system designed to minimize the number of people coming in, to make sure that those people that do go to the UK are the richest of the bunch, and to milk them of all the cash they can possibly get.

If that feels hyperbolic, go take a look at the tuition fee structure for postgraduate study in any major UK university

the cost of living in the UK is substantial, but it is still smaller than the ~£20k+/yr you'll need to pay for tuition if you're self-funded (or which your external funding will need to pay)

Anonymous

> milk them of all the cash they can possibly get

Anonymous

11:12

Straight to the point, lol

Emilio Pisanty

@Blue well

call me a cynic if you want

but I was there for long enough to form an informed view of the topic

the major UK universities whose inner workings I saw are run and operated like businesses by their managers

they are constrained by law as to how much they can charge UK / EU / overseas students

the cap on overseas-student fees is about 2.5 times larger than the UK / EU tuition-fee cap

the more of those students that you get paying the higher fee, the more money you get

Anonymous

Yeah, I was only appreciating the straightforwardness ;) That's one of the main reasons why I am planning to avoid the UK (unless at least I manage to get some kind of external funding)

Captain Bohemian

@Blue the term "milk them of all the cash" is a phrase I first learnt. I just checked its meaning in dictionary.

@Blue what is MRes program?

Anonymous

@CaptainBohemian imperial.ac.uk/study/pg/courses/doctoral-courses/integrated-phd

Captain Bohemian

since UK intends to "milk them of all the cash they can possibly get", I feel so strange why UK education exhibitions are so common here. That those exhibitions are so common seems to indicate UK is a freindly country to study, but their only funding EU-students indicates that's not the case.

Anonymous

11:27

> I feel so strange why UK education exhibitions are so common here.

Secret

I sometimes never understood, other than milking for money, what is the point of paying for education

Anonymous

Doesn't that logically follow from that they "like to milk people of all their cash"? :P

Secret

Unis in australia used to be free

Anonymous

Obviously the UK universities have some incentive in holding such exhibitions

Secret

But then, I don't know what other economy we can move to that does not have this "milking for x" property

Anonymous

11:29

The universities which have to advertise themselves are usually not the ones with a lot of available funding

Secret

Even most current proposed forms of socialism and communitarianism, there is still some sort of token in that you need to get a certain amount of x in order to get stuff

Is it really physically impossible to have an economy where there exists no token of incentive?

so that people will not be forced to earn x just to trade services to survive?

Anonymous

@Secret Such an economy is bound to fail in the modern world

Captain Bohemian

@Blue from the perspective of UK, it's the case, but from the perspective of our country, that's not the case. The organizers of education exhibitions should feature the educations of the countries which support us to to go there to study.

John Rennie

To be fair to UK universities, the amount of money they receive from the government has been decreasing for decades and they are now desperate for funds. There are currently rumours that several universities are about to go bankrupt.

Anonymous

Barter

In trade, barter (derived from baretor) is a system of exchange where participants in a transaction directly exchange goods or services for other goods or services without using a medium of exchange, such as money. Economists distinguish barter from gift economies in many ways; barter, for example, features immediate reciprocal exchange, not delayed in time. Barter usually takes place on a bilateral basis, but may be multilateral (i.e., mediated through a trade exchange). In most developed countries, barter usually only exists parallel to monetary systems to a very limited extent. Market actors...

Anonymous

11:31

See the section on "Limitations"

Anonymous

@JohnRennie I have had that impression for some time now. Is that because of mismanagement of funds on the government's part?

Anonymous

I guess it would be a long story :P

Secret

@Blue ah... I am not thinking about exchange, but something similar to the model of how open source software communities work, where passionate people make something and then benefit other users, and then these other users make something else they are good at and then which naturally benefit to people who needs them. Is that still some kind of Barter?

John Rennie

@Blue there is a problem that afflicts all states. As the standard of living rises the cost of anything that requires employing humans increases. This particularly affects teachers, police, health care, etc.

Anonymous

@Secret But there will always exist some lazy people who are good for nothing and yet they'll have to be kept alive

Secret

11:34

hmm... good point

John Rennie

That means either the government needs to increase taxes to meet these increased costs, or it has to reduce funding to keep the taxes the same.

The problem for governments is that raising taxes is not a road to electoral success, so all governments have been reducing funding. This has been particularly marked since the financial crash that started in 2008.

Secret

Sometimes, I don't understand how tax cut policies works. Won't rich companies just end up hoarding more revenue that they never had a chance to use (because it grows so fast) and thus wasting it in the process?

Yet many conservative governments love tax cut policies, saying it can somehow stimulate the economy

What incentivise a company under tax cut benefit to fund more to other services?

John Rennie

@Secret the idea is that you cut my taxes, and that means I have more money to spend. So I increase my spending on goods and I pay more for services like hairdressers, gardeners, domestic cleaners etc.

Anonymous

@JohnRennie Interesting. But any reason why places like Germany are being able to manage their funds so well that they can afford to make higher education almost free? I don't think the living standards in Germany and UK are too different

Anonymous

(I'm a noob about EU's political history btw)

Secret

11:39

Ah I see

John Rennie

That means the people who make the goods I buy and provide the services I use get paid more, and they in turn start spending more. The end result is to stimulate the whole economy.

@Blue Germany is far more productive that the UK. The UK has virtually no manufacturing industry left because we are so crap at it. Plus I get the idea that Germans are more willing to pay their taxes than Brits.

Anonymous

> The UK has virtually no manufacturing industry left because we are so crap at it.

Anonymous

Eeeh, why is that tho - "crap at it"? Obviously, there's not much difference in the average intelligence or work ethics of people

John Rennie

If I knew that I'd be earning millions as a consultant

Anonymous

Germany is apparently far ahead in technology it seems - with so many manufacturing industries

Anonymous

11:44

But I don't know the reason why the other big EU countries couldn't pick up that pace

Anonymous

Is it because of bad administration or misplaced priorities?

Anonymous

As for the taxes part - again, I don't quite understand why the average German would be more willing to pay it than the average Brit

Anonymous

Probably I'm missing out on some history

John Rennie

Different societies do differ a lot in how much they are prepared to pay as taxes. American's are notoriously unwilling to pay tax. I would guess it comes down to how much the government is trusted. American's tend to regard the government almost as an opponent.

Anonymous

> American's tend to regard the government almost as an opponent

Anonymous

11:49

lol

Anonymous

Sorta the same in India

Anonymous

Yeah, trust seems to be one big factor

Anonymous

I don't trust any of the political parties here

Secret

There are many strong conservative voices in America, as well many successful businessman who just want the government to stay out of the way

Anonymous

And so I don't vote in the elections either

Secret

11:50

In contrast, Sweden has the highest tax rate but also very very good wealthfare

The midterm results might suggest there is a chance that Hillary or someone in Democrats will win the 2020 election

Anonymous

Trump might run again

Anonymous

Although this time the chances of him winning would be pretty low

Secret

Personally, I like Trump's foreign's policy, it is at least not as sluggish as those back in obama days, despite they are also riskier due to his unconventional style

Anonymous

Americans don't seem to have much better alternatives either

Anonymous

It's a bit sad though. America has some of the brightest minds in the world and yet that's what you get to with all the fools entangled with the system. Well this is now getting a bit NSFW for chat, so I'll stop

Secret

11:54

Meanwhile, there seemed to be more socialists and other ethinic groups in the democrats. I will expect the democrats will shift further left on its way towards the 2020 election. Whether that is a good idea I don't know

Captain Bohemian

@Blue we will have an election of senators, and other politicians on Nov. 24. But I don't know whether I will vote. Actually I am not interested in politics at all.

Secret

Except that politics have become so <insert suitable word> you can no longer escaped it. Even the American Chemical Society is playing close attention to the midterm to see how it will affect government funding on research

In australia, I have some connections with a range of political parties as a general public (not a member) and from their regular talks and campaigns, I am always up to date on what they are mostly up to

US politics and Australian politics tend to copy each other, so the effect of US to us is quite significant

Anonymous

Not only Australia. US politics directly affects almost all the countries in the world

Anonymous

Well, that's expected when you have >25% of world GDP and the strongest military

Secret

Australian federal election will be next year, and my ideal vision of a parliament is a hung one with a lot of independent and small parties, so as to steer australia politics away from the stagnation of the two big parties over the last 8 or so years

But as a general public, my only political power is my vote. Luckily we have preferential voting

Interestingly, I do discussed some of my preference with the members and officials of the big parties, and each of these discussion, came up possible leads on how to fix the big parties

but it is not going to be easy because every party have too many corrupted officials in them that prevent them from functioning properly

I am however, one of the majority of the demographics that lean towards supporting small parties and independents

For the demographic itself, this is because trust in politicians is an all time low from high electricity prices to drought

But for me, I think the more innovative nature of small parties give me more hope to fix things up

Captain Bohemian

12:17

@Secret I was once accosted by someone on the street to request me to sign to support some small party for some proposal I can't recall now. She spent a long time trying to convince me, but I still refused to sign.

It's not that I am against that proposal or the small party, but I just feel meaningless to sign that as I have no opinion for them.

Secret

For me, I don't sign anything unless I am sufficiently well informed. That's why it is good that they have these talks and seminars for the general public to sort of learn more about them

My political alignment, however, is pointed out to be one of the most unusual by at least 16 parties and think tanks, and only 2 other people in my campus share a similar enough alignment

This alignment in particular prevent me from devoted to any single party, thus I cannot be a party member (because I want to understand the full picture by going to all of them)

It's not that I have no opinion in politics, but that I have something in align and does not align with every party. For example, I am a very environmental person, and I support many conservative ideals except for anti LGBT issues

Captain Bohemian

the reason I have no opinion is that proposal is irrelevant to me.

most politicies those politicians address as their competition for the election are irrelevant to me.

they usually address some welfare for certain kind of people, like free tickets for old people, free education for kindergarten, most being irrelevant to me.

they never have policies for research funding

Secret

yeah, science is not very popular in their agenda usually. One of our two big parties here in australia is said to be going more and more antiscience as time progress

Anonymous

Umm, researchers constitute a meager fraction of the population. If I were a politician it wouldn't be worth spending my time advertising policies for them (at least that's how most people would think).

Secret

12:32

As for the other, while they do have a science division, they are mostly industrial level stuff more than university funding

One of the small parties made of scientists want to change that in the coming election by electing at least one person into paliament so that e.g. more funding on nuclear fusion for example

while they have managed to get a lot of exposure, so far they are still not very successful to get elected in the byelections so far

Anonymous

Nuclear research is still okay and some in the government might be concerned about it. But very few people in the government would ever care about research funding for say mathematics

Secret

Ah yes, pure maths is always the worst in terms of outlook of the academia researches

Anonymous

So basically you are supposed to think of the greater good of the country while voting in the elections

Anonymous

Not just your own field

Anonymous

That would be a tad selfish

Secret

12:37

that is true, and what politics ideally shoudl be like. The issue is people get mired in power play too much, and then when they get into government, they usually lost the spark that prompt them to change the world in the first place

Two small parties here actually have a single issue campaign of trying to overhaul the voting system into a liquid democracy one
I don't have chance to contact with them yet, has been a lot of class clashes and PhD deadlines to fight

Captain Bohemian

that's why scientific people are not enthusiastic about political voting; I seldom saw my classmates talking about political voting when there was an impending political election.

Anonymous

It's not that their voting would change the results anyway :P

Anonymous

So it's fine

Secret

Personally, I prefer to sort of use a method inspired from measurement in quantum mechanics:

> Just reach out and talk to these people. When they find you have bright ideas, it actually can influence the wider policy somewhat

It's like a measurement because of how priming works. The moment you are exposed to a different worldview, you are already affected by it, even though you don't feel anything different

So most reasonable politicians are like quanutm states. Once you talked to them, they get "measured" and then there is a tiny chance they will do something along the lines you want

Jim

@Blue Yeah, I got busy. But I'm signed in to hbar every day and will usually get around to responding if you ping me

Anonymous

12:43

@Jim Cool, cool. No worries :)

Captain Bohemian

12:54

it takes a lot of votes to change the election results. there has never been a candidate who wins or loses the election by one single vote.

since I don't know how to move massive votes from one candidate to another I never feel voting is something really meaningful to do.

rob

13:25

@CaptainBohemian Counterexample: a state race decided 11608-11607.

That was one year ago.

Jim

14:00

@CaptainBohemian the way to do it is by convincing everyone who feels the way you do to get out and vote

That is a form of the continuum fallacy. It has the form of this: "I can lift 1 grain of sand easily, and if I could lift N grains of sand, it is ridiculous to think that I could not lift N+1 grains of sand. Therefore, I can lift an infinite amount of sand."

You, sir, are a grain of sand, saying it is ridiculous to think that your vote will break the back of the party you're against, nor will any other single votes. You do not see that every grain of sand is needed to increase the mass and no one makes it too heavy, but together they cannot be lifted. While no one vote changes the outcome, all votes are required and each one does make a difference

Sir Cumference

Morning

Anonymous

14:21

There are just two simple assumptions involved here - firstly, the assumption that not everyone is as lazy as me, so even if I don't go to vote, it won't change a thing and secondly, the assumption that not everyone else thinks like me. :P

Sir Cumference

Tinkerbell effect

The Tinkerbell effect is an American English expression describing things that are thought to exist only because people believe in them. The effect is named after Tinker Bell, the fairy in the play Peter Pan, who is revived from near death by the belief of the audience. Another form is called the Reverse Tinkerbell effect, a term coined by David Post in 2003. It stipulates that the more you believe in something the more likely it is to vanish. For example, as more people believe that driving is safe, more people will drive carelessly, in turn making driving less safe. == Various applications... ==

E.g. the more people think their vote won't matter, the fewer will go to vote, so each individual vote will matter more

(well that's the reverse version)

Anonymous

In my country it's more like - irrespective of who gets elected, we're doomed ;)

Sir Cumference

That sounds more like

Pessimism

Pessimism is a mental attitude in which an undesirable outcome is anticipated from a given situation. Pessimists tend to focus on the negatives of life in general. The most common example of this phenomenon is the "Is the glass half empty or half full?" situation; in this situation a pessimist is said to see the glass as half empty, while an optimist is said to see the glass as half full. Throughout history, the pessimistic disposition has had effects on all major areas of thinking.Philosophical pessimism is the related idea that views the world in a strictly anti-optimistic fashion. This form...

:P

@Blue Well in seriousness, there's certainly limitations on what elected officials can do. E.g. I'm not a fan of the trump administration, but it's not quite the doomsday everyone expected/feared.

Caring about politics is good, but some alarmism is very common

Anonymous

14:38

@SirCumference That's true. One single person cannot bring about radical changes and also they're always answerable to others and will face some opposition when taking any decision. However, a great leader is one who can positively influence the whole population and the future generations as well. But yeah, that kind of leadership is rare and also difficult to maintain over an extended period

famesyasd

If I have a rigid body and inside it a moving point M can I apply Euler's formula etc to find its velocity? M is not a part of this rigid body (I guess) but can I pretend that at any given point of time it is and then apply Euler's formula etc? If not does this rigid body matter in any way?

Anonymous

At least one thing which is nice about Trump's admistration is that they haven't shied away from talking drastic steps and it hasn't been stagnant, albeit whether that has caused more harm than good is open for debate

Semiclassical

The simple reference point for me is the number of judges/directors etc that Trump has appointed

In that regard his administration has already been a success for his camp

Trump won’t be president in a decade, but his judges probably will

and while I despise that outcome, it’s hard to argue with the return on investment

Slereah

15:12

man

I'm looking at thesises around me

There's fucking Henneaux at the Bruxelles university!

Captain Bohemian

@Slereah what about him?

Slereah

Henneaux of Teitelbaum-Henneaux!

Captain Bohemian

I know he does a lot of research very interesting but he has no PhD position now.

Slereah

that he does not

But he is in the lab

Lozansky

In electromagnetic waves, what exactly is carrying the momentum?

Captain Bohemian

15:24

he does have postdoctoral positions now.

Slereah

@Lozansky The field

The derivative of the field gives the momentum density, to be exact

Lozansky

@Slereah But what exactly in the field?

Semiclassical

The field isn’t a substance; it doesn’t need to be

Lozansky

Hmm

Semiclassical

The field intrinsically possesses momentum

Lozansky

15:28

Feels kinda abstract lol

Semiclassical

Well, yes

Slereah

you're trying too hard to relate it to quantities you already know

The EM field transports momentum and this is known because it can transfer it to particles

it's just a quantity in the end

it doesn't have to have any "realness"

you might as well ask why mass carries momentum

Semiclassical

In the quantum context, you could also say the photon carries momentum. But that isn’t different, at the end of the day, from saying that the field carries momentum

I object a little bit to that phrasing: momentum does have empirical consequence and is in that sense perfectly “real”

Slereah

Well sure but all physical quantities do

Semiclassical

But it’s not some kind of “substance”

This is more philosophical than anything tho

Slereah

15:34

yeah

Lozansky

I suppose in some sense it is in the same vein as the question "where is the electromagnetic energy stored?"

Semiclassical

In the field :p

Slereah

In the end the big lesson you have to learn in physics is that physics is like this

Measurements are taken -> [math happens] -> other measurements are predicted

There's no need to worry about reality in the middle step

Semiclassical

At the very least, you have to appreciate that that programme in Physics has been very successful

Slereah

For a start because different models can have the same predictions

Semiclassical

15:36

You can still wrestle over whether a theory is satisfactory in a philosophical sense. But the “shut up while you calculate” mindset has worked quite well

Slereah

Did u know

It is entirely possible to get rid of the EM field in classical electromagnetism

You can express every formula entirely as a function of the charge distribution

Semiclassical

Sounds right

In classical E&M, the fields are just (very!) convenient abstractions from the underlying sources

Slereah

Jefimenko's equations

In electromagnetism, Jefimenko's equations (named after Oleg D. Jefimenko) give the electric field and magnetic field due to a distribution of electric charges and electric current in space, that takes into account the propagation delay (retarded time) of the fields due to the finite speed of light and relativistic effects. Therefore they can be used for moving charges and currents. They are the general solutions to Maxwell's equations for any arbitrary distribution of charges and currents. == Equations == === Electric and magnetic fields === Jefimenko's equations give the E field and B field...

Semiclassical

I imagine talking about EM waves is rather annoying if you do that tho

Slereah

Well it may get weird if you have sourceless EM waves

Semiclassical

15:40

Yeah

Slereah

but if we assume no sourceless waves, it works fine

Semiclassical

I mean, no EM wave is truly source-less

Slereah

well we don't know that :p

There may be primordial big bang EM waves!

Semiclassical

Lol, true

Slereah

It seems Henneaux has his fingers in a lot of pies at the Bruxelles lab

Semiclassical

15:42

I guess I should say that there's no empirical necessity for them?

Slereah

probably not

Semiclassical

Regardless, they’re such a convenient approximation that trying to do EM radiation without them would suck

Slereah

I mean we can't even really talk about classical EM pre-symmetry breaking anyway

I think I'm gonna try to write a cover letter for that university and send it to them

Bruxelles isn't too far from me

ostrichguy

Hey everyone

Slereah

Hey

ostrichguy

15:48

It's the festival of photons in India today

So Happy Diwali ^___^

bolbteppa

@Slereah (send an e-mail asking if he has anything)

Slereah

yeah

just gonna send some email with my interests

see if anyone wants me

bolbteppa

Don't send generic ones

Anonymous

@ostrichguy Same to you :)

Slereah

Hell this isn't for a computer job

ostrichguy

15:50

:)

Anonymous

I finished two boxes of chocolates all by myself ;)

Slereah

Of course I'm not sending a generic one

The hard part will be to not make it too long!

bolbteppa

Yeah

Slereah

plus that lab seems to have really nice research stuff

The Lille lab doesn't really have much cool theoretical stuff

bolbteppa

It's open application time right, lots of stuff have December deadlines

Novalium Company

15:51

Hello guys! I was just wondering, why for example the oxygen molecules' position in $CO_2$ stay like on a line and in $H_2O$, the hydrogen molecules are not placed like in $CO_2$ and are not in a 'line'. Sorry for the bad explanation.

Slereah

Also I should probably buff up on my physics if I have to go to an interview

Anonymous

Molecular geometry

Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It includes the general shape of the molecule as well as bond lengths, bond angles, torsional angles and any other geometrical parameters that determine the position of each atom. Molecular geometry influences several properties of a substance including its reactivity, polarity, phase of matter, color, magnetism and biological activity. The angles between bonds that an atom forms depend only weakly on the rest of molecule, i.e. they can be understood as approximately local and hence transferable...

Slereah

Gotta read my string theory and whatnot

Novalium Company

@Blue Thanks :D

Slereah

It's probably the most motivated I've been for a thesis, but I guess having a terrible job helps

Novalium Company

15:52

@Blue How are you? How is uni going?

bolbteppa

Depends on where you apply to, doubtful strings would come up hah

Anonymous

You'll get an idea after your learn about molecular orbitals and all that

Anonymous

@NovaliumCompany One week holiday for now :D

Novalium Company

@Blue Good job! :D

Anonymous

How's it going for you?

Slereah

15:54

@bolbteppa Well the labs are like

Black holes, quantum gravity, QFT stuff, supersymmetry

Novalium Company

@Blue Good thanks. Going to high school... I ordered Nektar Impact GX61 and I'm excited!

Slereah

the first two are probably my best shots

Anonymous

@NovaliumCompany Umm, what's that?

Slereah

I mean I could do QFT I suppose

Novalium Company

@Blue nektartech.com/impact-gx49-61.html 3 days to arrive yay!

Slereah

15:55

But I'd need to refresh a bit

It's been a while

bolbteppa

@Slereah nah you're not expected/supposed to know anything, you'd have a shot with any of them, interest is the main thing

Anonymous

@NovaliumCompany Synthesizer? Noice

Novalium Company

@Blue Yop :D

Anonymous

My brother has one, but I never tried those myself

Slereah

@bolbteppa I'm an old man, though

Gotta impress :p

And I'm not a student there

Anonymous

15:56

I'm pretty terrible with musical instruments lol

Slereah

Also not a citizen of Belgium

Hell I'd do it for no salary really

Anonymous

Did you learn playing it at school?

Anonymous

Or by yourself?

bolbteppa

@Slereah talking about undergrad/masters thesis, worst case scenario being grilled on the basics, is all they can really do tbh

Novalium Company

@Blue Oh, I started with music very very young, like 4 years old. I had guitars, pianos... I can also sing, so... I'm all made of music :D I learn everything myself.

Anonymous

15:57

@NovaliumCompany Whoa...awesome

Slereah

@bolbteppa Oh well

Hm

bolbteppa

mm*

Slereah

Wonder if I could finish that wormhole paper in a short time

I must find all my reserves of motivation to finish that

That might be useful to bring up

Novalium Company

@Blue Do you regret entering uni?

Slereah

(By reserves of motivation I mean the energy drinks)

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