d_tr

43 ms·

511.
by d_tr 6y ago
It is AFAIK a very standard approach to treat two interacting quantum systems (e.g. two electrons) as "measuring" each other and work with density matrices and partial traces to see how the "measurement" is evolving and
512.
by d_tr 6y ago
Systems get entangled with each other by interacting. So entanglement cannot "propagate" faster than the fastest possible "mediator" of an interaction, which is the speed of light. The "instantaneous" aspect co
513.
by d_tr 6y ago
The efficacy does not need to be super-high, provided enough people decide to actually go get vaccinated, and the percentage of skeptical people seems to be quite high. Plus, any given vaccinated individual would have to rely less on othe
514.
by d_tr 6y ago
Greece :)
515.
by d_tr 6y ago
In my country we raise our hand to say "thank you", but I also do this to say "I 'm sorry" when there is no other safe way to communicate.
516.
by d_tr 6y ago
It might sound a bit harsh but OTOH anyone who decides to cheat in this context has plenty of time to reevaluate, since (I guess) it takes some preparation and energy.
517.
by d_tr 6y ago
> a few poor peoples' ability to eat or stay warm is nothing in the face of the climate crisis. Or maybe, in such a case, the people who have actually been consuming (and emitting) like there is no tomorrow all these decades should
518.
by d_tr 6y ago
> I always hated the dull mathematic definition of "a matrix represents a linear map" because what the matrix actually represents is completely context dependent. The projection and translation matrices you mentioned represent
519.
by d_tr 6y ago
Agreed. I think that the distinction between the objects and their possible representations should be made clear from the beginning, simply because it will make things easier to understand. IMO, just a couple of chapters from an introductor
520.
by d_tr 6y ago
Any point on the shell, whether the shell has zero thickness or not, has zero mass, but a finite mass density is assigned to it. Any finite mass is spread out, so you cannot have zero distance to enough of its points to feel infinite force.
521.
by d_tr 6y ago
You and pdonis are correct but you are saying different things. Inside a perfect solid sphere, you would of course feel force everywhere except at the center, but this force would only be due to the mass that is nearer to the center than
522.
by d_tr 6y ago
I am not a mental health expert but I do not think of this type of persistent trolling as healthy behaviour. At the very least it is shitty and disrespectful behaviour towards someone trying to make a point using facts.
523.
by d_tr 6y ago
Thanks, I actually had a vague memory of having read about this somewhere. Cool!
524.
by d_tr 6y ago
Only on X11 though, and you can only use X11 window managers.
525.
by d_tr 6y ago
But, this was done by third-year students in an educational context. It is just a way of learning by doing instead of by only studying books, and even bright students have to learn the basics first.
526.
by d_tr 6y ago
I think the point of the comment was about the difference between risking only your health (bad diet -> heart disease) vs risking the health of others as well (coronavirus 'rebels').
527.
by d_tr 6y ago
It is definitely a must to try and find downsides and weigh them, but even with RISC-V thrown into the mix, the situation will be far from what it was 25 - 35 years ago, and in addition the tools are much more advanced. Modern compilers can
528.
by d_tr 6y ago
> Do we really want to be faced with a multiplicity of distinct ISAs? There exist excellent and free / open-source tools for dealing with this kind of inconvenience. Even then, is it worth it? IMO, yes , because screw having to pay
529.
by d_tr 6y ago
Thanks for the reminder. I actually read about this somewhere (probably on ArchWiki), while installing Arch a few weeks ago, but I totally forgot to actually opt-in. Really nice distribution, btw ! My favorite, so far.
530.
by d_tr 6y ago
I do not see anything in zozbot234's comment that implies that Rust should strive for feature parity with C++. Some features, however, such as being able to use integer values as generic parameters, are arguably pretty useful.
531.
by d_tr 6y ago
You said two different things about Rust but you did not substantiate anything. What do you mean by "Rust is so clearly a byproduct of the C++ world"? Furthermore, in which way is Rust defective to the point that it should be seen
532.
by d_tr 6y ago
Well, this is the point...
533.
by d_tr 6y ago
I believe that a lot of people here might be interested in "Minimal Fab", developed by a consortium of Japanese entities. These are kiosk-sized machines that a company can use to set up a fab with a few million dollars. Any indivi
534.
by d_tr 6y ago
Reddit has, on more than one occasion, outright blocked me from reading posts from the phone's browser, demanding that I download their garbage in order to continue (I did not, of course).
535.
by d_tr 6y ago
I wondered the same. These are microbenchmarks after all and it does not even seem like a clear win.
536.
Warp Processing(cs.ucr.edu)
2 points by d_tr 6y ago|0 comments
537.
by d_tr 6y ago
For what it's worth, Cray is also offering supercomputers with A64FX chips.
538.
by d_tr 6y ago
I am really happy to have come across this post, mainly due to this fact.
539.
by d_tr 6y ago
I do not get the "not exactly ARM" bit. The chip has a lot of cores that execute standard ARM code with SVE instructions mixed in. You can download the manual for the SVE from ARM's website. Following a quick search I also se
540.
by d_tr 6y ago
The text you linked to actually says that the SVE was developed cooperatively by Fujitsu and ARM, without, however, going into details about who did what.

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