Yuras - Network

I know that national security adviser has nothing to do with security, but it's still funny to think how security adviser discusses war...

I know that national security adviser has nothing to do with security, but it's still funny to think how security adviser discusses war plans on a messenger. I mean, what if it actually was *his* advise in the first place?

If there is no free will, then anything is permitted

If there is no free will, then anything is permitted

Code auto formatting cult is one of the reasons why we have "also I reformatted the whole thing with...

Code auto formatting cult is one of the reasons why we have "also I reformatted the whole thing with <new-formatter-released-this-morning>, I'm sure you don't mind" PRs now.

Winter is coming to the northern hemisphere, so here is your annual reminder:As you heat your room, its internal energy doesn't...

Winter is coming to the northern hemisphere, so here is your annual reminder:

As you heat your room, its internal energy doesn't change.

"A room is not heated by increasing its internal energy but by decreasing its entropy due to the fact that during heating, the volume and pressure remain constant and air is expelled."
The article is pretty accessible: http://www.stat.physik.uni-potsdam.de/~pikovsky/teaching/stud_seminar/Heating_room.pdf

I repeat, to heat a room you solely transfer energy to the outside.

#thermodynamics #physics

Those extroverts... They usually are not bad people, but it makes them even more irritating.

Those extroverts... They usually are not bad people, but it makes them even more irritating.

Is P5 veto power in #UNSC an example of Chesterton's fence?I mean, SC is a healthier organization then GA thanks to, among other things,...

Is P5 veto power in #UNSC an example of Chesterton's fence?

I mean, SC is a healthier organization then GA thanks to, among other things, the veto power.

It turns out #drawing a body is not that hard after you figure it out. I mean, it's far from perfect, but it's literally just few...

It turns out #drawing a body is not that hard after you figure it out. I mean, it's far from perfect, but it's literally just few hours away from the primitive stick figure.

Doing it in #inkscape was a brilliant idea btw. I don't need to spend a week learning how to draw smooth lines just to lose all the muscle memory once I stop practicing.

On a real trajectory system trades kinetic energy for potential and vise versa. E.g. to increase T you have to decrease V, so they change in...

On a real trajectory system trades kinetic energy for potential and vise versa. E.g. to increase T you have to decrease V, so they change in opposite directions, but their sum is constant.

When varying the real trajectory, it's other way around. If the new trajectory has more kinetic energy, then system can trade it to get more potential energy. In this case T and V vary in the same direction, but their difference is stationary. That's it.
#physics

I'm a bit surprised the latest Veritasium video about the Hamilton's principle didn't actually explain the peculiar minus sign...

I'm a bit surprised the latest Veritasium video about the Hamilton's principle didn't actually explain the peculiar minus sign in the Lagrangian for mechanical system:

L = T - V

It's all about energy conservation actually.
Here is my take:
#physics

"Nuclear terrorists turn to supercomputers to map out matter's building blocks in 3D"Wait, what?!Ah, "Nuclear...

"Nuclear terrorists turn to supercomputers to map out matter's building blocks in 3D"
Wait, what?!
Ah, "Nuclear theorists"...

The ejective [k'] sound is so cool. Now I'm going to use it everywhere 😁

The ejective [k'] sound is so cool. Now I'm going to use it everywhere 😁

I guess at this point the whole web thing needs to be thrown away and redesigned from scratch with simplicity in mind. It should be possible...

I guess at this point the whole web thing needs to be thrown away and redesigned from scratch with simplicity in mind. It should be possible to implement browser in two weeks to make sure we won't have monopolies anymore.

Learned differential forms, and now I can't unsee them :|They are kinda everywhere

Learned differential forms, and now I can't unsee them :|
They are kinda everywhere

#survival tip of the day: instead of the North Star, tree grows rings etc, you can use runway numbers for #navigationComes handy when you...

#survival tip of the day: instead of the North Star, tree grows rings etc, you can use runway numbers for #navigation
Comes handy when you have an airport nearby.

When you have type classes, everything looks like an instance#haskell

When you have type classes, everything looks like an instance
#haskell

#haskell puzzle for you. The following code rightfully produces a "Redundant constraint: MonadReader () m" warning:{-# OPTIONS_GHC...

#haskell puzzle for you. The following code rightfully produces a "Redundant constraint: MonadReader () m" warning:

{-# OPTIONS_GHC -Wredundant-constraints #-}

import Control.Monad.Reader
import Control.Monad.State

test :: (MonadReader () m, MonadState () m) => m ()
test = do
-- when False (return ())
get

But when you uncomment the "when False (return ())" line, the warning disappears. Guess why? No, it's not a bug, at least you can argue it's not.

"Unfortunately this integral can't be expressed in a closed form"Well, I disagree with the "unfortunately" part,...

"Unfortunately this integral can't be expressed in a closed form"
Well, I disagree with the "unfortunately" part, because otherwise #math would be inconsistent, which would be truly unfortunate.

I wonder whether most people who post to a hashtag (I mean, any hashtag, not just physics) are actually subscribed to it.

I wonder whether most people who post to a hashtag (I mean, any hashtag, not just physics) are actually subscribed to it.

I probably need to unsubscribe from #Physics. I mean, yes, that's a sad news, but one post per minute is a bit too much IMO.

I probably need to unsubscribe from #Physics. I mean, yes, that's a sad news, but one post per minute is a bit too much IMO.

This #xz thing motivated me to finally learn m4. Turns out it's a really nice little language, though a bit weird.

This #xz thing motivated me to finally learn m4. Turns out it's a really nice little language, though a bit weird.