The h Bar - 2015-07-15 (page 1 of 2)

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12:00 AM

@0celo7 Right. Arrival time. Because I am a a particle experimenter and there is no other variable.

0

Q: Are elementary particles travelling wave and standing wave solutions to a second order hyperbolic differential equation?

http://vixra.org/abs/1506.0016 Does the following abstract or the above paper explain the nature of elementary particles and the structure of space? Space is a four dimension spherical shell comprised of energy density, where the distribution of energy density in space is determined by distribu...

quantum-mechanics general-relativity forces gravity elementary-particles

0

Q: Is there any physical way to describe the location of an Unobserved Electron without using a mathematical probability?

This is a highly complex thought, at least it seems so to me, so I'll probably have to clarify, but let me just state my question (which by itself is fairly straightforward) and then use the background of my curiosity as an explanation. Is there any way to describe the physical location of an Un...

quantum-mechanics

@dmckee Not sure if sarcasm

0

Q: Do I need a particle to simulate a particle?

Edit TL/DR Is an assumption of the theory that the universe is a simulation that the simulating universe is fundamentally more complex than our own? The Long Version As a programmer, I find the argument that the universe is a simulation unlikely for a number of reasons, and the idea that we'll...

simulation metaphysics

Seems to be a lot this evening (in my time zone, anyway).

Is MO east?

Central.

Central is unnaturally wide.

We poached some of east and a lot of mountain.

I can't ever get that straight

It confuses me that Tennessee is east

Maybe just the eastern half is

12:05 AM

If anyone is interested in both Physics and Philosophy, I and a more adept philosopher just had a discussion which ended unresolved, on whether or not a computer simulated perfect replica of a human brain would be sentient. Would anyone care to read and resolve?

Discussion between hellyale and Media…

Imported from a comment discussion on philosophy.stackexchange...

@RandomGuy This is a religious issue with a lot of people and will remain so until someone does it.

But religion has no place in philosophy nor physics, the only two schools of thought relevant to this conversation.

user54412

@RandomGuy Well now, that depends on your definitions of religion, philosophy, and physics :)

@ChrisWhite Are you still here by any chance ?

user54412

@Hippalectryon yes

12:16 AM

:D ok so from what you said we have $0<\omega^2<\frac{4}{LC}$. How do you conclude $0<k<\frac{\pi}a$ from that ?

user54412

The key is that the repeated values of $k$ for a fixed $\omega$ don't count. There is a $k$ that corresponds to $\omega^2 = 4/LC$. For any larger $k$, there is a smaller $k$ that the system would actually transmit wave with if driven with that $\omega$.

Oh, so it's not technically the "only" frequencies at which it can propagate right ?

user54412

You could initialize a disturbance everywhere in space with any wavenumber $k$ you want. When you release it at $t = 0$, it will appear to oscillate at every point with frequency $\omega$. However, if you drive the system at one end with frequency $\omega$, you will not set up propagating waves of arbitrarily large $k$ (i.e. arbitrarily small wavelengths).

Ok, thanks :-)

user54412

This was a good question, in that you basically had the answer, but it's worth thinking about what the equations and inequalities mean.

user54412

12:28 AM

And I hope I didn't say anything wrong above.

Well it cleared things up for me :D

~ Good night ~

user54412

12:53 AM

They're (hopefully) getting the signal right now

user54412

...signal received, all systems nominal

1:33 AM

loling at the "U-S-A" chants by the emcee

user54412

well, we did just bring freedom and democracy to Pluto, right?

But Pluto's not even a planet, so why bother bring those there?

Does that girl really have blue hair?

user54412

you can never tell with NASA images -- could be false-color

It's still going to take a year to DL the data, right?

user54412

yeah :(

user54412

1:41 AM

I wonder how strong the signal is. Like, could I pick it up with a 2-meter radio dish?

I wasn't paying 100% attention, but did he really just attribute NH's success to Obama?

user54412

lol, something like that

That does not compute. Obama was elected 2 years after NH was launched.

They should be attributing the success to Bush, if they wanted to put it on a politician

2:29 AM

user image

3

@KyleKanos You call that slow? Clyde on a pogo-stick, KBO, look at your orbit!

PSA: I didn't make it, it was posted on imgur

Some of the comments were along the lines of "slow" being not true at all

Well, sure. But I was directing my comments at the not-quite-a-planet thing.

It is pretty funny. Aside from the speed bit.

Of course, the planetologists never agreed with the demotion, but they mostly identify with different professional organizations, so those that are part of the IAU were out voted.

Imgur can't handle my Morrowind screenshots.

1600x1200 isn't even large...

@ACuriousMind @ChrisWhite Tonight's Morrowind highlights: Is that one of those thingies?!? Not that impressed tbh... Did vanilla look this plant-y? Well that's just ridiculous...he might as well be a ghillie suit sniper.

2:47 AM

@0celo7 Real men game in 280x192 green on black.

Just sayin'.

I doubt the game resolution goes that low

But loderunner looks fine.

@ChrisWhite @ACuriousMind My drastic health drop is due to...swimming. Didn't know slaughterfish are such assholes.

I have a sneaking suspicion my flora mods made that way harder than it should have been.

// You can think of that as waving my cane and shouting at teenagers to get them off the grass...

@dmckee You have officially won the "old man" badge

2:54 AM

All the planets & moons of our solar system: imgur.com/gallery/RCDRZ

4

(except not all the moons of Jupiter because there's just too many)

@Kyle That's cool.

Cooler than my Morrowind adventures I see...

now I'm going to go cry myself to sleep

D':

omg msi afterburner has an fps counter??

I can delete fraps!

3:10 AM

Last one:

user image

3 hours later…

5:55 AM

@0celo7 Vanilla wasn't this planty, iirc, whatever you're using may have overdone it.

Nice new avatar pal :)

@KyleKanos What about the moons of Saturn? :P

@skillpatrol Thanks. For the uninitiated, it's Xan, continuing the thread of avatars from old RPGs.

2

2 hours later…

8:23 AM

@ACuriousMind New expansion for BG:EE coming soon...

@ACuriousMind There are many, but there's one whose radius is bigger than that of the planet itself.

9:25 AM

Lots of downvotes on the front page... I know it's good to downvote crappy questions, but this is quite a spike

Has there ever been this large of a spike for upvotes @DavidZ?

@DavidZ More interestingly, almost half of my 'newest questions' page has questions with zero votes and zero answers.

Isn't this proposal exactly what Physics started out as ? > area51.stackexchange.com/proposals/65426/…

9:41 AM

No, Physics was always about physics

And, Chemistry was always about chemistry :)

The point is all science and economics SEs already do what the proposal proposes to do with the proposed site.

@KyleKanos ha

@0celo7 That is decidedly impassionate.

@Gaurav ...so? I don't get the point

@DavidZ So I don't find any purpose to support the proposal

9:49 AM

Sure, well if you're not particularly interested in open science then you wouldn't have any reason to

I think it's a good cause but I'm not sure how much it needs a Q&A site. A lot of that is already covered on Academia and the science sites.

@DavidZ That's exactly my point. What does the proposed site cover what those you mentioned don't ? I'm surprised it has 95% commitment.

Well, it is kind of a fringe topic for Academia. Evidently there are almost 200 people who think it does need a Q&A site (or at least can support it).

It wouldn't be the first time a site was spawned to cover a subject already included in an existing site. E.g. the current astronomy.SE was created even though astro questions are on topic here.

Well, I think changing site guidelines at Academia is better than creating a new site. Such a new site would risk getting poor popularity and at the same time risk Academia's popularity too.

10:04 AM

@ACuriousMind I fear this is the case. Mfw I picked the "less bushy" option.

@Gaurav You might want to bring that up on A51

10:24 AM

@gonenc Assorted pictures of Einstein and this random dog that shares my oxygen.

He's a skinny baby in some of these.

@0celo7 That look. Cats always look at me as if they're really annoyed at my existence on Earth.

@DavidZ It seems there's this exact question posed already : discuss.area51.stackexchange.com/questions/19946/…

@0celo7 Plus, cats are really tough to make friends with.

11:12 AM

Drawing attention towards a rare event (at least IMO):

user image

1 item in the reopen review queue in Meta ! How often does that happen?

There have only been 28 reviews in all, since $t=0$ for Meta.Physics.SE!

2 hours later…

1:15 PM

@KyleKanos you online?

How come you never ask me if I'm online

I've been to Canadia

My sister in law is Canadian

We're practically brothers

This isn't about Canadia stuff, but if you feel left out then hang on...

@0celo7 you online?

That's not very sincere

I pretend because I care

Maybe you can help me though

My work computer doesn't have any sort of graphics creator/editor software

I want to make an image for an answer of mine

nope

I don't even know how to use MS paint

1:19 PM

I wish I had MS paint. That is literally exactly the program I need

I don't even know if I have MS paint...will definitely have to check later

So what you're saying is I was right to not ask you?

No

I could have known

In another world, I could have known

But we're in this world

and I know Kyle Kanos knows

you don't know which world you're in

geez have you read any multi world QM?

1:22 PM

I am in this world. That is a tautological statement

huh, is "infinitely long rod" an exact solution in GR?

an exact solution to what?

the Einstein equations...

I'd need to see the metric

How could "solution in GR" be interpreted any other way? serious question

1:24 PM

I don't know, but an exact solution in GR usually is a metric. An infinitely long rod doesn't seem like a metric

metric of a spacetime with an infinitely long rod in it...

home.comcast.net/~peter.m.brown/gr/grav_field_rod.htm

That depends what the spacetime is and how you define the rod. I imagine there are some solutions that are exact and some that aren't, depending on the definition

I shall investigate this after my breakfast

Is it a massive rod?

why has @KyleKanos been absent the last few days anyway?

1:26 PM

he hasn't

@JimsBond I assume so

he was here yesterday

seriously

his profile says he was last seen ~1 hour ago

creep

1:27 PM

If you scroll up to the top of this chat page, he is the second post from the top

right after dmckee at 22:35

he was here last night

He wasn't here during work hours

I'm sure I remember you spoke to him yesterday

he was here

22 hours ago, by 0celo7

The cord barrier, whatever it's called

Right there, you were speaking to him

Oh shit that's right

question me again!

Will I get a burrito or omelette for breakfast

1:32 PM

burrito

Hmm

or better yet, burromelette

0

Q: Why some people insist one unlikely possibility?

Once in while, someone will insist dark matter is no particles, which is totally possible, but not likely, and insist curved space (or ________) is the only possible. When you explain this to him or her, he will reply you something totally irrelevant. What I don't understand is why they so insi...

@0celo7 why are you being so distanced to your dog?? :(

this random dog doesn't seem like too lovin

the 4th one is adorable, it should be your avatar ;)

2:02 PM

@gonenc I believe ocelots are closer to their fellow cats than dogs.

2:22 PM

@JimsBond Senate burrito = omelette wrapped in a tortilla :D

@gonenc My dog is awesome, he sleeps on my pillow with me

@gonenc he's too skinny in that one

@0celo7 mine too, but it seems like you are inclined to your cat, who also has a name, whereas your dog is just the dog :D

I call Einstein "cat" a lot

He listens to "Steiner cat", which what I usually call him

@0celo7 well cats don't tend to learn their names but dogs on the other hand knows their names perfectly well :) btw I'm not judging you that you are mistreating your dog

how old is the dog?

"mistreating"

@0celo7 was it a wrong word?

2:29 PM

he's 6 or 7

@gonenc mistreating an animal = abuse or neglect

@0celo7 oh that wasn't what I meant, sorry

<--3rd world person :D :P

@gonenc Give me a square crop on #4...we can see how that looks

@0celo7 how come they don't fight then?

Look at how small the cat is compared to the dog in #4 vs. #11

@gonenc why would they fight

they fight over food, that's about it

@0celo7 cat vs dog?

mine chase cats like a madman

2:33 PM

your dog needs to be better disciplined

I'm pretty sure my dog thinks the cat is his child

@0celo7 the cat has definitely put on some weight

the cat definitely thinks the dog is his mother

@0celo7 nice move removing that :)

@0celo7 isn't the dog a bitch? I though you said it was male

@0celo7 dogs chasing cats is like their nature :D

@gonenc the dog is male

the cat is stupid

@0celo7 :D they tend to be compared to a dog :D

2:37 PM

@gonenc not mine

btw do you know why cats and dogs can't get along in general?

the cat cases the dog more than the dog chases the cat

dogs wanna play with cats so they wag their tails, but tail wagging means preparing for an attack for cats, so the cat does something stupid thinking that the dog will attack the cat hence the disagreement

i knew that

@0celo7 btw #4 is already square

2:46 PM

i.imgur.com/TPmxwuF.jpg?1

@0celo7 I've been moving a friend across town. All sorts of fun heavy-lifting that a younger guy like me can handle

still?

All done now. Sat, Mon & Tues

why do people think using shitty grammar, poor spelling and multiple question marks on PSE is effective????

??????????????????

why???

Because they don't know any better?

2:53 PM

These are people who are obviously in college or high school. Would they write a school paper without caps and with multiple question marks?

@gonenc What are you working on now?

I edited a post a couple days ago because the author didn't put any spaces between punctuation.I left the comment in my edit that said "Spaces must come after punctuation marks".Later,they edited the question to include more content and again none of the punctuation had spaces after it.it's like they are actively ignoring proper grammar and just expecting others will fix it

indeed, it's called trolling

as the official troll here,i declare that to be crap trolling.

2

note i am not admitting to being a troll

nonono

no troll here

@JimsBond at some point you can just start downvoting for that :-P

it's the spike high enough :-P

3:05 PM

@DavidZ The content they added was good. Would have given a +1. The poor grammar cancelled that back to no vote

I lose chat privileges every few hours.

I bet someone is toying with my rep.

A sure way to keep chat privileges is to have accounts on 20 SE sites

That's the only way.

just answer a damn question...

@obe What area of physics are you most comfortable with?

If none, then consider asking a question instead of answering

3:10 PM

@Jimself I only know a bit from several areas.

As for Donald Trump's impact on the race, Huckabee claimed the firebrand real estate mogul is probably more attractive for disenchanted voters who want to "burn the whole thing down."

Answer some analysis questions on MSE

The only position I know Trump to hold is building a bigger fence

@KyleKanos Wrong. A freaking wall.

@0celo7 Same thing

Fences are for suburbia. We need a wall.

3:12 PM

another brick in the wall?

@0celo7 Why not a dome that covers the entire nation? With doors that can open and close for airplanes and ships

And maybe a sunroof

@Jimself good.that will protectus from those candian omgrels from the above

@0celo7 I was thinking the same thing

more or less

user image

^Spaceballs

Planet Druidia

TY

3

I was more thinking like a Dyson dome, but that's an excellent reference too

Why did a thank you get starred?

3:18 PM

No clue

why did someone star my trollimg comment

i didnt approve that

No clue

it was you...

@0celo7 Well, because you are a troll?

I am not a troll.

3:21 PM

What is going on here? A "thank you" with 3 stars? Next someone will be telling me they can believe it's not butter

How dare you accuse me of patrolling for trolls.

@Jimself I am pretty sure I can tell the difference between animal fat and vegetable oil

your arteries certainly can

That's it, I'm dreaming. How do I wake up from this nightmare?

turn off the computer

3:23 PM

Never!

@Jimself Jump out of your window

I don't have one

Make one

good call

LinkedIn's search phrases need some fixing

3:26 PM

such as?

Somehow, under the search physics AND phd, a ski patrol position was listed

calculate the slope of the hill

@0celo7 "Snow physics" is what got caught

seems more like "math" and "phd" is applicable

can an astrologist even do trig?

@0celo7 Probably not.

3:29 PM

Atlanta-based chapter of NAACP has proved once again that the acronym was well chosen. If you don't know, NAACP stands for "Blacks Are Always Creating Problems" and it is an organization of blacks who always want to create problems. (No, the actual expansion of the acronym is "National Association Against Caucasian People".)

wtf

Google tells me Lubos

Yeah

We hear that they are paying taxes so they have the right to decide what the government demolishes. Well, I would have to see all the W-2 forms and tax returns of these NAACP individuals to think that the claim "we pay taxes" is something else than a cruel joke.

I'd support a Trump/Motl ticket.

Lubos can't be veep

Have to be able to be presi to be veep, and only natural-born Americans can be presi

National Association for the Advancement of Colored People

The National Association for the Advancement of Colored People (NAACP) is an African-American civil rights organization in the United States, formed in 1909. Its mission is "to ensure the political, educational, social, and economic equality of rights of all persons and to eliminate racial hatred and racial discrimination". Its name, retained in accordance with tradition, uses the once common term colored people. The NAACP bestows the annual Image Awards for achievement in the arts and entertainment, and the annual Spingarn Medals for outstanding positive achievement of any kind, on deserving Black...

3:33 PM

We can change the laws

28th Amendment, let's goooo

NAACP should be declared a terrorist organization and responsible authorities should do everything that's needed to thwart this multi-billion-dollars terrorist act whose plans have been unmasked. They are a threat not only for America but for the heritage of the whole mankind, for the global cultural civilization. Unfortunately, just like the Taliban and ISIS thugs enjoy some "elevated protection" by the communities in which they live, the same comment applies to NAACP, too.

@0celo7 Not without a minority of the population causing such a commotion over it that the change isn't enacted for many years after being proposed

@0celo7 Who is saying this?

@Jimself lumo

> All should unite in honest efforts to obliterate the effects of war, and to restore the blessings of peace. They should remain, if possible, in the country; promote harmony and good feeling; qualify themselves to vote; and elect to the State and general Legislatures wise and patriotic men, who will devote their abilities to the interests of the country, and the healing of all dissensions. - Robert E Lee

2

@KyleKanos Notice, he only said you should elect "men"

@Jimself Women didn't yet suffer

3:36 PM

lol, good reference to women's suffrage

Lee's got a few quotes worth citing to the next a-hole who wants to keep his Confederate flag

Heck, that flag so often seen wasn't even the flag flown for most of the Confederacy! This one was:

If you want to celebrate the Confederacy (not recommended), use that one.

The other flag was picked up by the Dixiecrats in the 1920's whose biggest platform was racism

racism has nothing to do with truth my friend

So when did it turn to the one that looks like the american flag and the union jack had a baby?

@Jimself That one was used by the Confederate Navy during the war, but, again, was picked up by the Dixiecrats

1920's

3:39 PM

The word "pentaquark" means "five quarks". They are hypothetical particles made out of five quarks-or-antiquarks. The Greek prefix is being used to remember the times when Greece was an advanced country, some 2,000 years ago.

How does one get the quote like @KyleKanos

Start with > and a space

Is lubos really saying all this? What happened to him?

@Jimself He's upset.

@Jimself He's always been fairly conservative

This kind of talk wouldn't fly where I'm from

3:41 PM

motls.blogspot.com/2015/07/…

Iran deal is equivalent to Nazi appeasement in '38.

@Jimself Good thing he doesn't live in Canada. Good think I don't live in Canada.

Crack-smoking mayor? Whatever. But we just don't accept people calling a human rights advocacy association terrorists

Well Iran deal isn't really much of a deal as an appeasement. US gives them a few billion dollars and they won't build nuclear weapons for 10 years. But we can't actually check on them

And they don't need to change anything about their behaviour

@Jimself How is destroying a carving going to do anything besides destroy a (very nice) carving and its history?

@0celo7 You've lost me

what carving?

3:46 PM

How is the NAACP acting as a "human rights" organization in this matter?

motls.blogspot.com/2015/07/…

Destroying a carving does not a terrorist make

They've done good work in the past, I'm not going to rush to judge them without more evidence

What Pisses Me Off About The Confederate Flag

Worth watching.

You Americans always have to get pissed off about one thing or another. Take a page from our book. Grab a beer, sit in a comfortable chair (or canoe if available), lean back and say "Meh, doesn't really matter that much. Long as they leave me and the people I know alone."

@Jimself You do know Stefan is Canadian, right?

(Born in England, raised in the Great White North.)

No

I didn't know that

3:53 PM

As an Ancap, the statement Long as they leave me and the people I know alone does not make sense to him as long as there is a government.

Oh, that doesn't apply to the government. That applies to everyone else. With the government it's slightly different. I can't describe it properly, but Canadians basically don't care what they do so long as whatever they do is a nice thing to do

If they think it's not nice, they'll complain till they're blue in the face

That's why all our science funding is being cut. Nobody knows how to tell if it's nice or not, so they don't complain much about it

4:06 PM

@obe Here is a question you could probably answer. It's simple so long as you understand the difference between a unit (the metric representing a quantity of a dimension) and a dimension (the physical property a unit quantifies)

4:31 PM

@Jimself There's an exercise in Wald that's been bothering me for a long time. How do I show that any particle inside the horizon of a Schwarzschild black hole has a lifetime with maximum proper time $\pi M$?

i.e. any particle inside of the horizon is doomed with a maximum lifetime of $\pi M$, corresponding to geodesic motion?

do I just write down the radial geodesic?

When you say maximum lifetime, do you mean the time until it hits the singularity? Because normally, I'd consider the lifetime of anything to be over once it crosses a black hole's event horizon

yeah, the proper time until it hits the singularity

from the Penrose diagram it is evident that it is finite, and this exercise in Wald asks the reader to calculate it

He also says to show that inside of the horizon $|dr/d\tau|\ge\sqrt{2M/r-1}$

Yeah, just solve for the proper time of a particle on a radial trajectory towards the singularity. Nothing fancy.

Is that an exact solution?

The radial equation I have here is quite complex.

because all trajectories point to the singularity, any geodesic will give the maximum proper time and all geodesics will have the same proper time

4:44 PM

I know that, I'm just having difficulty actually doing the computation

what's the problem?

or rather, what's the geodesic equation that you have?

Wald gives $\frac{1}{2}\dot r^2+\frac{1}{2}(1-2M/r)(L^2/r^2+1)=E^2/2$

wanna put another $ on that?

Sorry don't have MathJax on this PC

woah, slow down. What's that L doing there? tell me it isn't angular momentum

4:47 PM

whoops

well that certainly helps

and E is? energy? of what?

E is the energy of the particle as measured at infinity

It's a constant of motion due to the timelike Killing vector

okay, so that solves problem 2 right there

True that

Actually, he had that as problem 1

Perhaps the total proper time follows somehow?

I was thinking something like $r_S=\int^{tau_\mathrm{max}}\frac{dr}{d\tau}d\tau$

I just have no clue how to do the integral if that's the case

have you tried inverting that? as in $\tau_{max}=\int_0^{r_s}\frac{d\tau}{dr}dr$

4:55 PM

Is that integral doable?

wolfram time

@0celo7 driving, diff forms and of course carroll

Driving?

and trying to finish the goddamn visa application

@0celo7 gotta learn some time how to drive

I don't know. I haven't tried to even figure out the integrand yet. But I know this problem has an exact solution

@gonenc you're 15?

4:57 PM

@0celo7 No I was in a boarding school in istanbul

you really don't wanna learn driving in istanbul

\int_0^a 1/\sqrt{a/r-1}dr

Someone with good software pls do

@0celo7 $$ missing

@0celo7 Wolfram timed out?

@Jimself Wolfram didn't even try

Try putting the integrand in only and see if wolfram gives you a nice simplification to use

4:59 PM

wolframalpha.com/input/…

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