• 3 Posts
  • 89 Comments
Joined 3 years ago
cake
Cake day: June 22nd, 2023

help-circle





  • Ah, thanks to you and the other poster about UEFI. I may have confused it with secure boot but if Debian supports that, then great.

    Debian uses Gnome by default so I used it for a while and hated it even after getting used to it, so I switched to MATE. KDE looked ok to me though I never explored it much. I might suggest it to her. I’m unfamiliar with Cosmic or Cinnamon. I think I want to start her with MATE, since I use it myself so I’ll be familiar with what she’s using in case she hit snags. But if she wants to switch to something else afterwards, that’s fine with me.

    She no longer seems to be able to boot into Windows because of a Microsoft lockout. So I’m going to write a USB drive for her and snail mail it to her.

    Someone else mentioned a VIOS setting so I may have to look into that too.

    There is a GNU/Linux user group in her town which has a meeting next week, so I suggested that she go to it. Maybe someone there can help her with installation if she hasn’t gotten it handled by then.

    Right now her only computer is an iphone, so it would be cool if there was a way to write a USB drive from that. Her phone does have a USB-C port but for older iphones, there are also USB drives with a Lightning connector on one end, so you can still write them from the phone.




  • I almost bought a Yoga with 16GB ram and a very fast AMD processor on black friday sale at bestbuy for $500 a couple years ago. A friend talked me out of it because the 16GB ram was soldered in and not expandable. Similar machine is around $1000 now. Oh well.

    Yeah get something sort of recent. Depending what you’re doing 16GB ram is more than plenty. 8GB is ok, 4GB is marginal.

    My 2011(?)-vintage T510 is ok for most of my purposes, but youtube has been migrating to cpu-hungry codecs so videos these days bog down the cpu and look janky. Maybe I can change some settings to fix that.

    I do like the idea of a yoga-style tablet for use as an e-reader.








  • solrize@lemmy.mltoscience@lemmy.world•maths
    link
    fedilink
    English
    arrow-up
    4
    ·
    edit-2
    16 days ago

    This is cool, it’s sort of like the hanging chain problem. Simplest solution probably uses the Lagrangian. Basically you want to minimize the potential energy, which is found by adding the gravitational potential and the spring energy as a function of where on the spring the weight is hanging. Then integrate the Euler-Lagrange equation to get the shape of the uncoiling spring.

    See https://en.wikipedia.org/wiki/Catenary for info about the hanging chain. There are good online tutorials about how to solve it but a quick web search didn’t find the one I remembered.


  • Photo in the article shows the examiner looking into the person’s eyes with literal binoculars. Is that really how the test is done? Is the picture AI slop or what? I don’t even see any optics between the binoculars and the target a few inches away, so dunno how the image can possibly be in focus. Is it because of the eye’s lens combining with the binocular? I read someplace that the eye’s lens has around 20mm focal length so maybe it focuses the binocular on the back of the eye.

    Ehh there is also nothing looking like scanning in the picture. The examiner just looks through the binocular. I think the picture is bogus.

    What I had been wondering was whether the test could be done with a phone camera and an app.