• 0 Posts
  • 15 Comments
Joined 3 months ago
Cake day: April 4th, 2026
  • historicaldocuments@lemmy.worldtoNot The Onion@lemmy.world•Safe firearm storage may reduce blood lead levels in childrenEnglish
    2·
    4 days ago

    Most traditional hollowpoints aren’t designed to break apart into shrapnel. They’re designed to expand in a controlled manner. The FBI protocol is that it should expand after passing through four layers of cloth (denim, fleece, cotton, and something else), then penetrate between 12 and 18 inches through standardized ballistics gel.

    A non expanding bullet might get double that much penetration if it doesn’t start tumbling. Projectiles designed for large, dangerous game are designed for no expansion and maximum penetration. It all depends on what the goal is.

    There’s a lot of youtube where people have put that kind of stuff to the test if you want to dig. There are a few results out there that are non-intuitive. For example, a regular 38 special hollow point out of a modern revolver often doesn’t get enough velocity to expand, so the cavity will fill up with cloth and over penetrate the gel even though it’s substantially less powerful than a 9mm.

  • historicaldocuments@lemmy.worldtoTechnology@lemmy.world•A Rivian Fender Bender Cost $42,000. Its CEO Says That Should Never HappenEnglish
    1·
    4 days ago

    Lots of rose colored glasses being worn here.

    I will take modern rust prevention tech every day all day. The control modules and circuit boards are a hole in repairablity, and there’ll be a wall where nobody makes them anymore and the specs are not published (considered proprietary/trade secret/whatever), and that whole vehicle will just have to be scrapped. The world won’t ever see the end of old body-on-frame vehicles with crate engines. Speaking for myself the “rose colored glasses” is a wish for the best of both worlds. I wouldn’t doubt it’s out there being done somewhere, but I’m sure it’s cost prohibitive to do it, or people are doing it for themselves.

    Maybe I’m just complaining because I don’t personally have the time/knowledge/workspace to do what I want in that area. C’est la vie.

  • historicaldocuments@lemmy.worldtoAsk Lemmy@lemmy.world•What’s with all the furry porn on this platform?
    7·
    5 days ago

    I ended up creating an account just to block communities/users. At the time there was a poster posting to his own instance that was federated with lemmy.world, and he was reposting nothing but reddit posts, and the volume was such that they had to go. With no algorithm there’s no way to just see subscribed stuff without losing out on discovering new things.

    And just a tip, Lemmy will let you export (to JSON) your configuration options to include who you’ve blocked.

  • historicaldocuments@lemmy.worldtoProgrammer Humor@programming.dev•C++ takes decades to master
    2·
    11 days ago

    Try the c++23 standard. There’s been a lot of cross pollination. Contrived example follows:

    #include <format>
#include <numbers>
#include <print>
#include <string>

int main(int argc, char *argv[]) {
    double pi = std::numbers::pi;
    std::string fstr = std::format("{}, {:>.2}, {:>.5}, {:>.10}", pi, pi, pi, pi);
    std::string h = "Hello";
    std::string w  = "World";
    std::println("{}, {}!", h, w);
    std::print("This won't have a {},", "newline");
    std::println(" but this will add it."); // Add a newline.

    // Can't put a non-constant string as the first argument to
    // print or println so they can be checked at compile time.
    std::println("{}", fstr);
    return EXIT_SUCCESS;
}