The h Bar

PM 2Ring

12:40 AM

@Student404Mus But that's the point. Bob can't know unless Alice tells him.

Avnish Kabaj

3:01 AM

@ACuriousMind Yes, exactly

The smog takes place because the wind stops blowing in the winters

user351417

3:38 AM

HNQ is a duplicate: physics.stackexchange.com/q/462618

Physics Meta

4:09 AM

0

Q: Why was my comment deleted?

I had a comment on this answer to my question which both clarified that one of my definitions was correct (F = m * a is correct, but not super helpful in this situation), and then also provided external sources where people could learn more information to help them understand the answer. (Especia...

DanielSank

5:18 AM

In quantum mechanics, given a harmonic oscillator with position $x$ and momentum $y$, there's a "correct" way to define the raising/lowering operators, i.e. such that $[a, a^\dagger] = 1$.

Is there a "correct" choice in the classical case?

user351417

What would a classical raising/lowering operator do though?

DanielSank

@Chair Make coupled oscillator equations easier to solve, e.g. via the rotating wave approximation.

Anonymous

5:36 AM

I do get some hits for classical ladder operators. C.f. this. I'm not acquainted with the idea though. :P

DanielSank

@Blue That statement reflects a spectacular failure of our educational systems.

There are so many important concepts introduced in quantum mechanics classes, but which are not quantum mechanical in nature.

Perturbation theory, avoided level crossings, and the $a$ and $a^*$ concept.

Anonymous

@DanielSank Indeed. I wish we spent more time studying how classical mechanics is mapped to quantum mechanics. One of the reasons I'm interested in the phase-space formulation of QM (although I'm not getting much time to look into it).

vzn

6:10 AM

← synchronicity, was just musing on my remarkable LHV theory of QM using classical oscillators, probably have no one to talk to about it (at length)... candidate #1 around most likely to understand/ engage with it announced blocking me long ago & others have no patience... "either" :( :'(

pZombie

6:28 AM

Given a box of negligible weight in empty space. We fill the box with some perfectly elastic marbles and neglect friction and any loss of energy due to bouncing of the walls inside the box.

We initialize the experiment by placing the marbles at random location and give them a random direction but with a specific fixed energy which is the same for all marbles. There are many marbles...

Someone who does not know what is inside the box, trying to push the box, will think the box has a higher inertial mass than what the mass of the box alone would suggest. The more energy we give the marbles the higher he would believe the inertial mass is

Can we derive m_inertial = E/c^2 simply by calculating the total energy of the marbles with the classical formula for energy E=1/2mv^2 (given marbles move at non relativistic speeds), combining the total energy of the marbles and simply insert it into E/c^2 ?

bolbteppa

@DanielSank the normalization on $\hat{a}$ and $\hat{a}^{\dagger}$ is motivated by wanting the form of the Hamiltonian to be of the form $\sum \omega \hat{b}^{\dagger} \hat{b}$, which can abstractly be arrived at in going from 1st to 2nd quantization, and the same Hamiltonian arises for classical coupled oscillators and their PB's, e.g. as in the first chapter of Greiner's Field Quantization

Without wanting the Hamiltonian to look this way there seems to be no reason to want one normalization over another, and this is important when you want to understand the choices of normalization in bosonic string solutions which often begin looking slightly different depending on the approach you take

PM 2Ring

6:59 AM

@pZombie Yes. Assuming you also include the (rest) mass of the marbles, of course.

pZombie

@PM2Ring Ah, right. I guess that is why it is better to do this thought experiment with photons inside a perfectly reflecting box or sphere

PM 2Ring

OTOH, since the marbles have non-relativistic speed the mass equivalence of their kinetic energy will be small.

pZombie

@PM2Ring i wonder if one could derive anything useful concerning momentum formulas when imagining marbles being hollow, negligible weight, perfectly reflecting spheres containing photons inside, giving them their inertial mass

DanielSank

8:05 AM

@bolbteppa Alright so in classical mechanics, $a$ has dimensions of square root of action.

Slereah

8:40 AM

Top of the morning to you

GodotMisogi

9:10 AM

@JohnRennie But you can argue that Zorn's lemma is the same as the axiom of choice c :

Slereah

GodotMisogi

9:48 AM

@Blue Shankar's QM book follows this kind of treatment, IIRC

Anonymous

@GodotMisogi Yeah, but in not much detail. I was looking into the differential geometry formulation of CM last week (David Kubiznak's PSI lectures), which were more insightful. It would be interesting to see how that translates in QM. Tobias Osborne also has some very detailed lectures on the symplectic geometry formulation of CM and QM but it's a bit too involved for me to invest time into, currently. :)

Anonymous

The other thing which I certainly want to learn is the nuances of quantization. Which is why Zachos' text appeared interesting. I'll try to get it printed soon.

GodotMisogi

@Blue I recall bringing up Sussman's Structure and Interpretation of Classical Mechanics before for a similar treatment, I think

Anonymous

I did pick up a copy of Abraham and Marsden from my university library but it's not very readable. :P

Anonymous

@GodotMisogi Ah, didn't try that one!

GodotMisogi

9:57 AM

It's perfect if you want to write code in Scheme and do nothing with it, lol

I couldn't bear going through his Functional Differential Geometry textbook as a quick route to learning both

Anonymous

Man, I need to shift to a math degree. I'm done with this transistors bs. :P

3

GodotMisogi

Oh, I can share my Advanced Algebra notes and exams if you want

Anonymous

Ah, sure. I plan to brush up my algebra during the upcoming summer vacation. :)

Anonymous

@GodotMisogi Do you use it in your research though?

GodotMisogi

@Blue Lol. I wish for the day I can use exact sequences in amphibious aircraft design

Anonymous

10:10 AM

Hehe. XD

GodotMisogi

@Blue Always remember, ℂ ≅ ℚ[x]/(x² + 1)

Speaking of my research, I decided to have a little fun:

...Never exporting to JPG again

Anonymous

@GodotMisogi I remember that much. :P

Anonymous

@GodotMisogi Why is your aircraft grinning?

GodotMisogi

It's a moustache

Anonymous

Oooh...

GodotMisogi

10:17 AM

I'm trying to make it difficult for facial recognition software to detect its features

Anonymous

@GodotMisogi On a serious note: You planning to stay in academia?

GodotMisogi

I think the moustache I added to my aircraft as a design element answers that question

Anonymous

Gotcha. Yes, it answers it perfectly. ;)

GodotMisogi

TBH, I'm not sure. I haven't really gotten into the hardcore aspects of my research, like programming CFD solvers, optimisers and such. I think once I get into that, I'll really enjoy it and want to continue

Anonymous

I see...

GodotMisogi

10:24 AM

I was heavily into studying lots of things (at a somewhat slow pace) till about 4 months ago, but then my terrible friends pushed me into the Netflix rabbit-hole, which has slowed things down

Anonymous

LOL

Anonymous

Tell your papa to cancel your Netflix subscription. :P

GodotMisogi

I'm actually using most online streaming services from India because they're cheaper compared to HK rates

Anonymous

Is there anything good on Netflix though (asking for a friend)? ;)

Anonymous

@GodotMisogi Understandably...

Anonymous

10:26 AM

I only watch the CW shows these days...

GodotMisogi

@Blue I liked Sex Education and You

Disclaimer: This isn't sexual harassment

Anonymous

I sure think you're trapped in a terrible friend group. :P

GodotMisogi

@Blue I think I'm going to watch this series; looks incredible

Anonymous

@GodotMisogi Oh, those are two separate shows.

Anonymous

@GodotMisogi Which?

GodotMisogi

10:30 AM

The PSI lectures you mentioned before

Mod-01 Lec-01 Analytic functions of a complex variable (Part I)

►

This is a great set of lectures too

Anonymous

Ah, yes. I love Balakrishan!

Anonymous

The PSI lectures are nice but the recording quality sucks.

GodotMisogi

@Blue More than Suresh Govindrajan does? :p

MartianCactus

hey, so the total work done on an object by the whole system is its change in kinetic energy right?

say we have 2 forces in a system, one is conservative and one non conservative

Anonymous

@GodotMisogi I know Govindrajan and he tends to be pretty appreciative of Balakrishnan according to his Quora answers. But I don't get your joke (assuming it's a joke...). Probably missing some backstory. :P

MartianCactus

10:33 AM

and the work done on an object by only the conservative force is equal to change in potential energy

then will energy change in potential energy still be equal to change in kinetic energy?

GodotMisogi

@Blue You'll notice a pattern once you watch that lecture series, then see an interview of Balki, Quora answers, etc.

Anonymous

Prof. V. Balakrishnan in conversation with Prof. Suresh Govindarajan

►

Anonymous

@GodotMisogi Well, Balakrishnan totally deserves that praise, respect and recognition. One of the most excellent lecturers I've come across. Definitely someone you can look upto. :)

GodotMisogi

Does anyone have any ideas on how to solve this PDE:

$$ \frac{\partial^2 I}{\partial x \partial y} + 4xyI = 0 $$

Separation of variables doesn't work because divergences arise when determining the constants

@Blue Undoubtedly

$$ I(x,0) = \frac{1}{2x}\sqrt{\frac{\pi}{i}}, \quad I(0,y) = -y\sqrt{i\pi} $$

MartianCactus

can someone answer?

John Rennie

10:42 AM

@MartianCactus it's not clear what you are asking ...

MartianCactus

my basic question is, first off, say we push a charge against an electrostatic force to some position, is the force applied by us against the electrostatic force conservative or not?

John Rennie

@MartianCactus the work done on the object i.e. $\int F.dx$ will always be equal to the change in the energy of the object.

So if the object is moving in a potential like the elctrostatic potential then the change in the PE + the change in the KE of the object must add up to the work done on it.

MartianCactus

yeah, but isnt the total work done on the object also equal to the change in its kinetic energy..? By the work energy theorem?

those 2 statements contradict each other,

John Rennie

@MartianCactus not if there's a PE change as well. Take a really simple example like pushing a mass attached to a spring. The work done goes partly into the PE of the spring so the work done is not equal to the KE change.

MartianCactus

ohh, so the work energy theorem does not work in case of a conservative force?

and only works for non conservative forces where PE is not available?

Slereah

10:52 AM

It's not easy finding good informations on manifold gluing

since "gluing" is also a common term for just the transition functions

there's no real common unambiguous term

GodotMisogi

Stitching?

researchgate.net/publication/…

Slereah

It can be stitching, it can be pasting, it can be gluing, it can be adjunction

finding sources specifically on the topic is tough and they rarely talk about fiber bundles

it's usually more for cobordism shenanigans

Captain Bohemian

it can be fusion?

Slereah

Never seen it, but why not!

Hirsch has like one page on gluing

bolbteppa

$I = e^{i(x^2 + y^2)}$?

Captain Bohemian

10:57 AM

I just find the term "fusion of representations". I am not quite sure what it means.

Slereah

Milnor has a few in his fancy paper

Wall has a whole chapter!

But it's not a super well researched topic I think?

So the physics papers on the topic are a bit handwavy wrt the math

bolbteppa

$\frac{\partial^2}{\partial x \partial y} e^{i(x^2 + y^2)} = - 4 x y e^{i(x^2 + y^2)} $

Slereah

Like the physics papers have quite a decent collection of stuff on gluing spacetimes but it's not super rigorous

I'd like to find a decent explanation of the whole "the metrics on the boundary have to be isometric for the resulting manifold to have a continuous metric"

It makes sense but y'know

Captain Bohemian

I guess "fusion of representations" means something analogous to the direct sum of representations.

Slereah

Maybe I should look specifically for connected sums

that's usually what gluing is used for

Captain Bohemian

11:04 AM

also, I guess "protected operators" mean the operators which preserve some kind of symmetry.

Slereah

and the proof is probably similar

bolbteppa

11:47 AM

@Blue this guy youtube.com/… is interviewing him

Anonymous

@bolbteppa Yep, I know Govindarajan. :)

GodotMisogi

12:07 PM

What about the constants of integration? I originally derived the PDE from:
$$ I(x,y) = \int_0^{\infty}\exp\left(-ix^2t^2 -iy^2t^{-2}\right)\,\mathrm dt = \frac{1}{2|x|}\sqrt{\frac{\pi}{i}}\exp(-2i|x||y|)$$
I know how to evaluate this integral via some manipulation and substitution, but I wanna experiment with this route

bolbteppa

Just by observation, with the $1/|x|$ in there I don't see this $I$ satisfying the PDE, nevermind the absolute values messing things up

GodotMisogi

Differentiate under the integral sign and see that it does?

Slereah

12:37 PM

"Understand how to glue together pants."

Important math

Slereah

1:03 PM

projecteuclid.org/download/pdf_1/euclid.nihmj/1273779568

Oh boy

apparently the keywords to look out for is "gluing riemmanian manifolds"

although 'course mine is semi-riemannian, but it will do

projecteuclid.org/download/pdf_1/euclid.tkbjm/1496164428

Yesss

that's the bastard

I really need to write an article for gluing spacetimes

it's a huge pain to gather infos

Slereah

1:27 PM

"Let $(M_\lambda, g_\lambda)$ be a Riemannian manifold with a Riemannian submanifold $B_\lambda$ for $\lambda = 1, 2$ and $\psi$ an isometry from $B_1$ to $B_2$. Let $\bar g$ be the metric on $\bar M$ which is defined to be $\bar{g}_p = (g_\lambda)_p$ for $p\in M_\lambda$.
A glued Riemannian manifold space $(M,g) = (M_1, g_1) \bigcup_\psi (M_2, g_2)$ is a pair of glued space $M = M_1 \bigcup_\psi M_2$ and a glued metric $g$ on $M$ derived from $\bar{g}$ which is a glued tensor field derived from the $(0,2)$-tensor field $\bar{g}$."

good stuff

Mo_

3:23 PM

books.google.com/ngrams/…

The first surge in the usage of the word "quantum is around 1913 which is when the theory first started to grow

The second occurs around 1940

which is around the time QFT was being developed

But what drives the third rise, starting from the 80s?

Slereah

Quantum leap?

I don't know

Mo_

@Slereah what is quantum leap?

I think it could be quantum information

Slereah

@Mo_ TV show

Mo_

Slereah

But it came out in 91

Mo_

3:35 PM

Ah...relativity is only declining ^

Slereah

RIP

Einstein was wrong

Mo_

@Slereah Probably due to the Bell experiments en.wikipedia.org/wiki/…

Sir Cumference

@Slereah Duffield rolls in his grave

that too

Slereah

things might be more complicated because quantum and relativity have other uses

for all we know it might be about blood quantum laws

samuel-lereah.com/articles/Physics/spacetime-gluing

it's coming

I just need to write all that bloody math

Mo_

What about "wavefunction"? Declining fast: books.google.com/ngrams/…

@Slereah Interest in the whole physics is on the decline books.google.com/ngrams/…

Nobody likes doing science anymore

Secret

3:46 PM

Muhahahahaha

Mo_

@Secret lol

sadly true

Slereah

books.google.com/ngrams/…

He has been around a while

Physics Meta

0

Q: Should one downvote a question while voting it to close?

The title pretty much conveys what I want to ask but I would elaborate a bit. If a question is appropriate to be closed due to either of the listed reasons for a question to be closed, should one also downvote the question provided one is voting to close it? In certain categories such as the ques...

discussion down-votes vote-to-close moderation best-practices

Secret

books.google.com/ngrams/…

user351417

-3

Q: Is global optimization of quantum computation possible? I want to study in MIT

My name is Takuro Matsumoto. I'm 30, male, Japanese. I am going to build a non-unitary quantum computer for especially creating many pieces of cool music by neuroscientifical global optimization. I insist that current ways to build quantum computers are impossible to calculate music because of o...

quantum-mechanics computer

user351417

4:01 PM

Saved for future reference

user351417

The wayback machine is indeed the place where good websites go when they die.

user351417

Huh, apparently that didn't work. Oops

user351417

Meh never mind, it's not worth keeping.

Anonymous

@Chair Eh, it's totally worth keeping! :P

user351417

@Blue Well, that worked just as well :P

Anonymous

4:06 PM

For future searchability: Is global optimization of quantum computation possible? I want to study in MIT.

Anonymous

Ah, the search takes some time to update.

user351417

"I want to study i MIT" is literally how all of us start 11th grade. By the end, it's "I want to college"

Physics Meta

1

Q: How to respond to questions from schizophrenic or pre-schizophrenic people?

About every other day, we get a question from a schizophrenic person. By "schizophrenic", I don't mean crackpots or people making elementary mistakes, I mean people with an actual mental disorder. For example, in their posts, they may mention being formally diagnosed with the disease, hearing voi...

discussion

Anonymous

@PhysicsMeta Thanks for raising this. :)

user351417

Like universities (from India, Europe, Australia, and US) come to my school every Fall to talk to 12th graders who're applying, a bunch of 11th graders crowd around the people from 'competitive' places and ask stupid/troll questions, while there's a tiny number of actual hardworking 12th graders who're genuinely applying to those places. I always think it looks kinda bad, and 11th graders even shoot dirty looks at 12th graders who go to talk to representatives of smaller/less competitive places.

Anonymous

4:19 PM

@Chair Ugh...I can relate.

vzn

universities are businesses (some nearly corps) and they make money (tuition + residence fees etc) even from dropouts, and those dropout rates, esp high for competitive universities, are not widely publicized... on purpose... o_O

Student404Mus

5:17 PM

What is the difference between purification and Schmidt decomposition ?

ACuriousMind

6:00 PM

@Student404Mus It's probably better if you explain why you think they are similar, because from where I'm standing they are just two very different things.

Sir Cumference

6:14 PM

Very sick of unsubscribe links sending me to broken pages

There's gotta be some law against that or something

GodotMisogi

@Blue I think this is the greatest shitpost of all time

ACuriousMind

@GodotMisogi Have you noticed there's a meta question right above asking whether that is the correct response to such a post?

Anonymous

@GodotMisogi You're underestimating our shitposts. :P Regardless, the OP mentioned some mental health disorder and I'd prefer that we don't discuss it here any further.

Anonymous

And now to shift to a lighter mood, you can view this...

GodotMisogi

6:29 PM

@ACuriousMind I just saw it, but what about it?

Oh, sorry, I misunderstood which post you were talking about

I understand, my bad

Anonymous

Eh, it's okay. I had missed that part too, initially.

Anonymous

6:43 PM

I have to admit that after having to view and deal with similar kind of spam over a long period of time has desensitized me quite a bit. I hardly care to distinguish between trolls and folks who're genuinely in distress. While I almost never comment on such posts, down-voting is usually a knee-jerk response. That certainly isn't a good thing, but it happens to the best of us, nevertheless.

JMac

7:09 PM

@Blue Part of my issue is, obviously I can't tell their state of mind at all. My approach is always to just try to be as honest and straightforward as possible. I don't hold back explaining why it doesn't make sense, or doesn't fit on the site; but I generally try to keep it in that scope

I've had a few conversations slip away from me and turn into long back and forths; but the other person never seems upset

DanielSank

Hi, everybody.

@Blue Transistors are not BS and if you understand electronics well enough you'll also understand quantum field theory.

Divergences in QFT are mathematically similar to an electronic circuit with positive feedback that causes the circuit to oscillate instead of e.g. amplify. "Regularization" of divergent integrals is the same as adding resistance to an oscillating circuit.

But the nice thing about learning electronics is that you not only will understand physics, but also get to build stuff.

Anonymous

@JMac Yeah, that's generally what we do. But I think knzhou's point is that even being too honest or straightforward in such cases can hurt the other person. It's probably better to not comment at all in such cases, or perhaps err on the consoling side.

Anonymous

@JMac Well, it's hard to say who's upset. :P

DanielSank

Why does the author's mental state matter? This isn't a hospital.

This site is for physics Q&A. Focus on the content.

If the person has a health problem there is likely very little you can do compared with other human beings in actual contact with that person.

So follow the site policy and be nice.

enumaris

7:36 PM

ahhhhhh too busy these days

ACuriousMind

I have noticed you've been here less since you've switched to work where you're no longer blocked from viewing images :P

enumaris

yeah...days are being filled with more "stuff"

also the 3 hours I spend in traffic every day ain't helping

ACuriousMind

ugh, 3 hours sounds horrible

enumaris

yeah so I already applied for an apartment nearby here lol

Novalium Company

8:24 PM

Sup guys.

I was wondering about ways the current programming IDEs can be improved and I came up with the idea that most of the programmers just copy paste code from the internet, so why not make a software with database of already premade code modules and just put use them, with also better autocomplete system. Like you will create variables by just Right Click -> Create -> Variable -> "Name". Or if you want a for loop, Right Click -> Create -> For Loop... Maybe the code will be colored so it's easy for

the eye to read.

Tell me what you think and if there's already similiar existing IDEs.

Emilio Pisanty

@DanielSank well, did you see the specific example that sparked this? What are your thoughts on how it should be handled? Straight non-mainstream closure and then let it sink?

ACuriousMind

@NovaliumCompany I'm not sure in what way clicking to create a variable definition would be quicker than simply typing the definition. You still need to come up with the name and the type, the keyword to declare a variable is usually something short like let or var - what are you gaining by not having to type that?

Likewise with a for loop - the only constants are usually the keyword for and some sort of body delimiters like {...} or begin...end. You aren't really saving much, especially since you tend to be a rather quick typist if you program a lot

For larger pieces of boilerplate code, many IDEs (or extensions for them) already support stuff like generating the shell of e.g. a unittest module in your favourite framework or similar things, or auto-generating getters/setters, etc.

Novalium Company

So simply asked, do you think there is room for improving programming, because in my opinion, at some point humans will program without even typing anything.

JMac

@EmilioPisanty I don't see the problem with that solution here. I just can't see how attempting to treat someone different because of a possible mental health issue is a good procedure. I know that personally, I am in no way qualified to help deal with it, and I would worry that any attempts at making special treatment a policy would do more harm than good

Novalium Company

Actually, at some point humans won't program at all, AI will do, but that's another topic.

@ACuriousMind If you were to improve programming, how would you do it? I mean, what flaws do you think there are in current IDEs. I've noticed that if you write long code it's harder to see what something is, so why not add color? Also for example I usually copy paste code from the internet, but why aren't IDEs supporting this already. For example if I want Jquery sorting function, I google it, search for it... copy paste... when it'll be much easier if IDEs supported that.

ACuriousMind

8:43 PM

@NovaliumCompany 1. Syntax highlighting is already supported in all IDEs I know, and they also do stuff like marking all occurrences of an identifier when you place the cursor on it, etc. I'm not sure what sort of "color" you think is missing. 2. How is the IDE supposed to support "copy-pasting from the internet"?

Sure, you want a sorting function, but you still need to choose the appropriate algorithm for your particular situation (e.g. optimizing for memory usage or for speed), and languages with large standard libraries tend to already supply most of the common algorithms one needs as easily callable functions.

What's taking time here is figuring out which piece of code to use, not the writing of the code. If you spend more time writing the code than thinking about what you should write, something is wrong

For stuff where code generation is both possible and desirable, it has usually already been done. Take for example parser generator libraries like ANTLR that translate a formally specified grammar into a fully implemented parser.

(and even in these cases, you will often find people prefering to still roll their own because it grants finer control over the specifics. IIRC, the gcc compiler had its generated parser rewritten to a hand-written one because it offered better optimization, error messages, etc.)

Novalium Company

Alright. Do you think there are any ways current programming can be improved, made faster, automized, maybe include AI somehow?

ACuriousMind

I'm sure it can be. Not all languages have IDEs supporting all these features and there's always the possibility that a problem can be solved more efficiently in a new domain-specific language than a general-purpose language (there's the infamous adage "Every sufficiently large code base includes a shoddy reimplementation of half of Common LISP")

And sure, stuff like the output of genetic algorithms (which is a sort of "AI", depending how you look at it) or the trendy neural nets sometimes solve problems more efficiently than anything a human would've come up with.

Novalium Company

8:59 PM

What about an IDE where programmers will submit for example sorting algorithms for others to use? And if anyone using the IDE needs for example Python Sorting Algorithm for speed, he can just search it and use it. Programmers will vote on code, so the faulty dangerous submittions of code will be left at the bottom unseen. Do you think that's a good idea for an IDE and does any IDE have this? Also by color, I mean, this. (gimme sec I'll send a pic)

ACuriousMind

Arguably, SO already fulfills the purpose of programmers recommending each other pieces of code by voting!

Anonymous

@NovaliumCompany Yeah, pretty sure people are already working on developing such IDEs.

Emilio Pisanty

StackSort connects to StackOverflow, searches for 'sort a list', and downloads and runs code snippets until the list is sorted.

Loong

Emilio Pisanty

Ah, it was in the alt text

ACuriousMind

9:02 PM

But it's been a long time, for instance, that I've used a language that did not have a standard sort either built in or in the standard library that was optimized for common use cases.

Also, programming is a craft, and you should understand what you're doing. An IDE that explicitly encourages you to copy-paste code you don't necessarily understand sounds like a recipe for even more unmaintainable code in the world

Novalium Company

Emilio Pisanty

@ACuriousMind this is the single most important part of this thread

Everything else can and should be dropped

Novalium Company

Programming now takes too much effort and time to learn, when in my opinion it's worth it to try to optimize it, automize it.

ACuriousMind

You just colored the indentation levels! I'm sure a) it's easy to plug that into any of the current IDEs if you really want to and b) that this would just distract me. The indentation levels are already what's supposed to show you the structure.

Novalium Company

@ACuriousMind Yep I see

I might as well just recreate Scratch

Anonymous

9:09 PM

@Loong While copy-pasting is not a skill, being able to search for the exact code on SO is certainly a skill. ;)

Novalium Company

I'm just looking for business ideas and I stopped at revolutionizing programming. :D

Anonymous

Most people have terrible search skills.

ACuriousMind

@NovaliumCompany Yes, but optimal programming does not necessarily equal fastest possible programming. There's a reason "If you want to go fast, you need to go slow" is a mantra of the test-driven development scene. (you don't need to become a religious TDD acolyte to accept there's truth to this)

JMac

@NovaliumCompany Why would you say it takes too much time and effort? I'm not a programmer, but my experience with programming is that it's not really any worse than other fields of practical study

ACuriousMind

You might be tempted to think that code is written to run, but on the day where you have to build a new feature into the thousands of lines of spaghetti code someone else left you you will realize that code should be written to be read.

3

Anonymous

9:11 PM

@ACuriousMind Tell that to the academics. ;)

Emilio Pisanty

@Blue I've been trying for a while

Novalium Company

@ACuriousMind What has that have to do with anything?

Emilio Pisanty

I've yet to see anyone above PhD-student level listen

Novalium Company

I'm talking about faster way of programming, not about reading? The code will still be readable.

ACuriousMind

@NovaliumCompany Code that is generated and pieced together from various places does not usually form a coherent whole. Inconsistent naming, no overarching architecture, varying formatting styles, etc.

Novalium Company

9:14 PM

Alright then. You are right.

So last question to everyone before ending the topic. If you were to improve IDEs, how would you do it? (What would you change, add, remove...)

Btw, I started programming this new website but I realized it's basically reddit. - www.evobby.com

Email: test@abv.bg and Pass: test should work.

ACuriousMind

I dunno, I'm pretty happy with IDEs these days. I curse my fellow developers and my past self far more often than the tools :P

Anonymous

@NovaliumCompany Some IDEs could use better in-built linters.

Anonymous

Mostly to check for the naming and stylistic errors.

ACuriousMind

Unless your language has an "official" style guide like PEP 8 or an official formatter like gofmt, it's hard to see how any two programmers would ever agree on adherence to which style to lint for :P

Novalium Company

Alright. I'll go now. Thanks for the discussions.

I was thinking about trying to program a better revolutionizing IDE, but when I saw this codota.com I was just... nah. Leave it to the rich.

I guess I'll look for other entreprenourial business ideas.

Anonymous

9:26 PM

Better autocompletion would certainly be useful! (Provided it works efficiently.)

enumaris

hmmm

Novalium Company

If anyone has any good business ideas but is too lazy to start. Tell me.

ACuriousMind

@Blue What language are you thinking of? I find autocompletion in languages where the type of every identifier is known at compile-time and variables have to be declared to be rather excellent already. Note that you can't really offer perfect autocompletion in something like Python since you don't have a perfect way to determine the possible types and "declaration" is implicit in first usage, hence don't know exactly what to offer for completion.

Anonymous

@ACuriousMind Uh, I was thinking more of C/C++ or Java. I'm reading the Codota FAQ (which Novalium linked) and it seems to have some interesting autocompletion features. I'll elaborate tomorrow. :P

DanielSank

@EmilioPisanty Link?

@Blue Academics whose experiments are sufficiently complex already agree with ACM. The high energy collaborations have reasonable code practices as far as I'm lead to believe. Even when I went around for post-doc interviews one of the professors I spoke with was more interested in the possibility of my helping his lab establish good code practices than anything else.

Emilio Pisanty

9:44 PM

@Chair @DanielSank this

enumaris

9:57 PM

anybody here familiar with mixture models and can give a 1-sentence summary? :D

DanielSank

10:13 PM

@EmilioPisanty In-band, there's really nothing useful to do other than to treat it like any other question. It's a bad question, so close/downvote/etc.

Even out of band, what else can we do?

Suppose the user is using their real name. In that particular case I guess you could try to contact someone who knows the individual and let them know that you've observed concerning behavior, but do we really think our false-positive rate is low enough to make that a good idea?

Jake Rose

If you have a jet hitting a wall, why does the pressure a large distance away from the point it shitting have to be the same as the original flow?

Emilio Pisanty

10:38 PM

@JakeRose a jet hitting a wall sounds like not a place I want to be

I take it you're describing something like this?

Controlled flight into terrain

A controlled flight into terrain (CFIT, usually pronounced cee-fit) is an accident in which an airworthy aircraft, under pilot control, is unintentionally flown into the ground, a mountain, a body of water or an obstacle. In a typical CFIT scenario, the crew is unaware of the impending disaster until it is too late. The term was coined by engineers at Boeing in the late 1970s.Accidents where the aircraft is out of control at the time of impact, because of mechanical failure or pilot error, are not considered CFIT (they are known as uncontrolled flight into terrain), nor are incidents resulting...

Anonymous

@EmilioPisanty Probably a water jet. :P

Anonymous

Your scenario is definitely more interesting. ;)

Physics Meta

0

Q: 20 most viewed questions that need answers

Here are 20 most viewed questions that need answers. Some of these questions may have answers with negative votes. Only questions with upvotes will be removed from this list. This list will be updated as questions are answered (which will be replaced with other questions that need attention.) Ho...

discussion questions answers editing

Jake Rose

@EmilioPisanty sorry, I meant s jet of water :’)

Jake Rose

11:02 PM

In a flowing fluid, what is the pressure in Bernoulli’s equation?

As in, the pressure in the direction of the fluid flow is greater then perpendicular to it right?

DanielSank

11:53 PM

Programming a quantum computer with Cirq (QuantumCasts)

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