I firmly believe that a “crustless ice mantle” meets the definition of an ocean.

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Cake day: September 3rd, 2023

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  • No, even without an atmosphere you have to contend with the diffraction-limited resolving power through an aperture (pupil), which is related to the diameter of the aperture and the wavelength of light.

    A diffraction process is, mathematically, a fourier transform. A fundamental mathematical feature of a fourier transform is what’s known as the uncertainty principle.

    Side note: you’ve probably heard of the special case of an uncertainty principle encountered in quantum mechanics frequently misattributed to the head of the Nazi nuclear program (Heisenberg), but this mathematical principle was actually well known for centuries beforehand, and the misattribution is mostly because of Nazi propaganda. We see it anywhere a fourier transform is used, from optics to orbital dynamics to quantum particles. This mathematical phenomenon is frequently miscited as quantum “weirdness” even though there’s nothing quantum (or all that weird) about it.

    The pupil restricts the possible positions of incoming photons. A restriction in position increases the variance of momenta (for a photon, speed never changes, but the momentum vector can still change direction). A smaller pupil is more restrictive and causes the image to be blurrier as the incoming photons from each object you are trying to resolve. If you want to be able to resolve smaller angular sizes (small objects at large distances), you need a large aperture that reduces position restrictions on incoming photons and therefore diffraction-induced blurring due to momentum uncertainties.

    Look up Airy diffraction for the special case of a circular aperture (e.g. a pupil or telescope).



  • What motivated you to switch branches? Did it solve another issue? Why were you not on the latest branch yesterday, ie, why did you roll back originally? Does one driver work better for some games, and another driver works better for others?

    Nvidia drivers are jank. I honestly haven’t touched them since 2017. I remember having to reboot and switch drivers to switch games I was playing with friends and finding the whole experience annoying as hell. I realized that Linus Torvalds was right, fuck nvidia, AMD is the way to go. Have not had to touch anything with my drivers since switching. All of my interactions with nvidia since have confirmed that they are not a company deserving of my patronage.



  • There’s usually only like 5 tracks. “What’s recommended” is nouveau, which works but not for gaming. It’s recommended because it’s open source and can do most things that the proprietary nvidia drivers can do. Nvidia is really bad at maintaining their drivers, and different drivers work better for different cards.

    Nvidia sucks. Switch to AMD and never have a problem again. Or spend an hour testing each of the proprietary options maintained in the debian repos, and most likely find that at least one of them works. Until an update to the drivers or kernel comes along, and breaks it again, so you have to play around with driver versions and kernel versions to find a combo that works. That’s less likely to happen if you stick with a debian-based distro vs a bleeding-edge distro like arch.

    And buy AMD for your next machine to send a message to nvidia that their driver support sucks!








  • AnIndefiniteArticle@sh.itjust.worksto> Greentext@lemmy.mlMath
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    2 months ago

    designed to penetrate body armor

    wrong gun to carry for personal defense

    Depends on what you’re defending against! Only people wearing kevlar body armor are cops, militants, and ice hockey goalies. I don’t know much about guns, but from the description you’re replying to this sounds like the right one for personal defense against wannabe fascist militias and overfunded/overarmed police forces. I agree it’s the wrong gun to defend against the defenseless, but shooting the defenseless is not what I think of when someone says “personal defense”.




  • I love organic maps and openstreetmaps. The biggest thing missing is satellite view. I like to wander around and explore an area on maps before visiting. OSM has more interesting/relevant details and better visual color coding than the vector street map on google. Google has a satellite map, which is non-negotiable for me especially if I need to quickly orient myself while driving in a new place. I use three layers loaded into qgis for planning trips: OSM, google maps satellite, and a topographic map from USGS. I sometimes use organic maps on my phone if I don’t have access to a computer with qgis. I rely on Google while on location because organic maps lacks a satellite feed.