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skykooler commented on Show HN: Do you know RGB?   maxwellito.github.io/do-y... · Posted by u/maxwellito
skykooler · 2 months ago
It would be nice if this told you upfront how many questions there were - after sixteen with nothing changing I figured it was probably endless but apparently there are twenty?
skykooler commented on KiCad and Wayland Support   kicad.org/blog/2025/06/Ki... · Posted by u/xvilka
ur-whale · 2 months ago
Over the many years Wayland has been promising to be a better toaster, I have tried to use it.

Every single time, I had to go back to X11 because shit simply don't work.

At this point, I am dead convinced that Wayland is simply broken by design.

As a matter of fact, they justify their existence by systematically pointing out how broken the architecture of X11 is and how a "modern" replacement is severely needed.

True, X11's architecture is indeed bad and creates lots of problems.

However, unlike Wayland, it DOES WORK.

Also, and very unfortunately for Wayland, the team working on it seem oblivious to the fact that trying to replace a badly designed system does not automatically make the replacement any better.

At this point, I would call Wayland a complete failure.

Worse, they've been at it for over 15 years and it is still fundamentally unusable.

The fact that Ubuntu is planning to deprecate X11 is, at this point in time, a catastrophe as far as I'm concerned.

skykooler · 2 months ago
The only reason I use Wayland is display scaling - with a high DPI screen, many apps are blurry or inconsistently scaled under X11. Given the parade of other issues Wayland brings, I wish the development effort were instead spent on improving highDPI support in X11.
skykooler commented on Jupiter was formerly twice its current size, had a much stronger magnetic field   phys.org/news/2025-05-jup... · Posted by u/pseudolus
vecter · 3 months ago
What makes that curve exponential?
skykooler · 3 months ago
Starting at an initial density of air, suppose you descend a distance D such that the air density doubles. Now your air is twice as dense, which doubles the pressure underneath it, meaning if you descend a further D the density will double again. Continue ad infinitum (or at least until the ideal gas law stops being a good approximation).
skykooler commented on Jupiter was formerly twice its current size, had a much stronger magnetic field   phys.org/news/2025-05-jup... · Posted by u/pseudolus
formerly_proven · 3 months ago
This is because of Newtonian gravity being inversely proportional to the square of the radius, right?
skykooler · 3 months ago
Gravity changes little over that distance - it's more because of the compounding effect of atmospheric pressure (the deeper you go, the more air you have above you which raises the pressure, raising the density and meaning that pressure increases exponentially faster).
skykooler commented on Reservoir Sampling   samwho.dev/reservoir-samp... · Posted by u/chrisdemarco
dekhn · 4 months ago
skykooler · 4 months ago
An interesting corollary of this is that if you only have a single sample, it reduces to indicating that your sample is the median value - i.e. if you see one item with serial number N, you can guess that there were roughly 2N produced.
skykooler commented on What Is "Induced Atmospheric Vibration"?   physics.stackexchange.com... · Posted by u/belter
felipeerias · 4 months ago
What I've been reading from multiple sources is that the electrical grid was in a brittle state because of the large percentage of solar and wind energy, as these sources are intermittent and unable to maintain the required AC frequency on their own. Apparently, it would be possible to make a renewable-heavy grid more resilient to these kinds of events, but Spain had not invested enough on the necessary infrastructure.

At the moment of the blackout, ~70% of the energy was being produced by solar and wind when sudden events caused a large loss of power and that brittle grid was knocked down as a whole.

There is a huge political row at the moment because the government has encouraged investment in solar and wind for a long time, so they are unlikely to admit that they might have contributed to the problem. Furthermore, they have closed down and demolished the remaining coal plants, and they plan to close down all the nuclear power stations.

skykooler · 4 months ago
My understanding is that coal/nuclear/gas plants provide a certain amount of stability thanks to the rotational inertia in the turbines. It seems like a relatively inexpensive way to retain that capacity would be to keep the old turbines to function essentially as flywheels, to stabilize the grid, after the plants powering them are shut down.
skykooler commented on A unique sound alleviates motion sickness   nagoya-u.ac.jp/researchin... · Posted by u/miles
marci · 4 months ago
and to test it here (it might be very loud!):

CTRL+SHIFT+I and in the console

    let o, a=new AudioContext();
    document.addEventListener("mousedown",function(){
      if (o) {o.stop(); o = undefined}
      else{ o=a.createOscillator(); o.type="sine"; o.frequency.value=100;
    o.connect(a.destination);o.start()}
    }) 

If you click anywhere it will start/stop.

skykooler · 4 months ago
It sounds like a pitch that you might hear from an airplane propeller, which leads to the question why airsickness exists if the antidote is ambiently present?
skykooler commented on Stainless steel strengthened: Twisting creates submicron 'anti-crash wall'   techxplore.com/news/2025-... · Posted by u/wglb
mjb · 4 months ago
That's just not true, though. Stainless (e.g. AEB-L) is up to four times tougher than simple low-alloy carbon steel (e.g. 1095). See https://knifesteelnerds.com/2021/10/19/knife-steels-rated-by... for example.

High hardness simple carbon steels do have their place in knives, but what you're saying is factually incorrect.

skykooler · 4 months ago
Toughness is not the same as strength.
skykooler commented on I ditched my laptop for a pocketable mini PC and a pair of AR glasses   tomsguide.com/computing/i... · Posted by u/T-A
supermatt · 4 months ago
How can the xreal one glasses be 3Dof and stay in place while this guy is moving forward and backwards in his chair?

https://us.shop.xreal.com/cdn/shop/videos/c/vp/bc70020e90a74...https://us.shop.xreal.com/cdn/shop/videos/c/vp/a2b82ae2ea714...

I appreciate its a marketing video, but this is just a lie, no?

What is the actual supported input resolution of the display? How do virtual monitors work - are they just a composite screen that needs to fit in that max input resolution, or is there some virtual viewport that is being managed by the connected device?

There is so little information about these on the website, and the few reviews I can find are basically people who got them for free (youtube is seemingly full of these right now) and clearly don't use multi-monitor setups to any great extent.

skykooler · 4 months ago
They do have accelerometers as well as gyroscopes, so technically they could integrate acceleration twice to keep track of position...but in practice it's way more reliable to just keep it at a constant distance from the head.
skykooler commented on Aptera's First Solar Road Trip. 300 Miles, One Charge   aptera.us/apteras-first-s... · Posted by u/geox
tenuousemphasis · 5 months ago
For a family of two?
skykooler · 5 months ago
I guess it could be a family of four if you have two of them and both parents drive.

u/skykooler

KarmaCake day3510October 12, 2011View Original