• Chemo@discuss.tchncs.de
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    11 hours ago

    It’s a good question. One of the major examples are wheelchairs. They could be much faster then they are but they are deliberately restricted to leg speed. Of course for safety reasons and so on but its kinda obvious that we don’t trust anyone disabled to excel non-disabled people.

    • Longpork3@lemmy.nz
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      11 hours ago

      Counter-point to that would be blade-style leg prostheses, with which ‘disabled’ people can acheive speeds far greater than non-augmented people.

    • milicent_bystandr@lemm.ee
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      7 hours ago

      You can get more raw strength out of a machine, but our biological bodies are something incredible, really. And when you need extra strength, there are machines you can operate with your body (e.g. with your fingers!) and leave behind when you don’t need them.

  • TomatenMark@lemmy.world
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    1 day ago

    Pretty much what everyone already said The force you want to move affects your whole body, you move objects against the effects of gravity, therefore your whole body needs to be in action. If you lift something over your head you put yourself between the object and the center of gravity, so your whole body needs to withstand the force of both Wich brings us to either an exoskelleton or an replacement, or Augmentation, of almost all your bones and muscles

  • AA5B@lemmy.world
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    1 day ago

    You want an exoskeleton. No need to replace your arm, just wear something that augments it, and the rest of your body.

    There are some great ones in sci fi, but google ot and see the ones available in real life

  • AwesomeLowlander@sh.itjust.works
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    1 day ago

    Because when you lift something, you’re not just using your arm, you’re using your whole body. Having an arm that could carry heavy weights would put large amounts of stress on the rest of your body as well, which would not be able to handle it. More importantly, the transition between prosthetic and flesh would be exposed to high stresses and current prosthetics technology is not able to handle those.

    • shalafi@lemmy.world
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      11 hours ago

      You’re touching on where “dad stength” and, uh, R-word strength comes from. Our brains limit us from tearing ourselves to pieces.

      Our old guy brains still think we’re 25 and act accordingly, and we fuck ourselves up. People with Down’s don’t have the limiter, so they appear to be super strong.

    • logos@sh.itjust.works
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      1 day ago

      That’s what I was thinking. You might have an arm that can carry 400lbs but man, that would screw up your shoulder and back.

      • TranquilTurbulence@lemmy.zip
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        1 day ago

        I guess the only solution is to become a full borg. That way, everyone titanium bone would be rated to handle superhuman stress and you could cary much more.

          • FoxyFerengi@lemm.ee
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            1 day ago

            As someone who recently started needing wheels, much of the world isn’t really built for that. Lots of uneven flooring in buildings, stairs, thresholds, spaces too narrow to traverse, etc. I get stuck often lol

          • TranquilTurbulence@lemmy.zip
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            1 day ago

            I can totally get behind swappable parts. Depending on what you’re doing, you could use different arms and legs specifically designed for the task at hand.

            See also: Adam Smasher

            • milicent_bystandr@lemm.ee
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              7 hours ago

              You could have swappable parts that, say your hand attaches to (with, for example, a flexible grip by your hand). That way you could swap an enormous array of parts, using your hand as a universal adaptor.

              Some of these parts could even by powered by your body so they don’t need an external power source. Like you could design a machine which, when attached to you by your hand, and powered by the rotation of your arm, could twist screws into the wall!

              • TranquilTurbulence@lemmy.zip
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                5 hours ago

                LOL. You can go places with convincing arguments like that.

                But seriously though, versatility is useful, but only up to a certain point. In niche cases, special tools make more sense due to the superior performance they offer. For example, running with a traditional leg prosthetic isn’t as efficient as running with a special running prosthetic. You know, those carbon fiber arcs that looks nothing like a leg (AKA “running blades”).

  • southsamurai@sh.itjust.works
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    1 day ago

    So, I gotta ask, are you redantman in disguise? Because he had a habit of asking questions that looked silly and simple on the surface, but weren’t.

    So, the first big barrier is that we don’t have the tech to make an arm that can exceed human levels of strength without damaging something. It also hasn’t developed to where the really strong options can fit into an arm sized package yet. Hydraulics can do crazy stuff, but you can’t pack it into an arm and get super strength.

    The second barrier to having a limb that’s super strong is that it’ll rip itself off, or you’ll be limited to the strength of the rest of your body.

    So, if you aren’t familiar, go look up “hang clean” on your favorite video site.

    It’s a power lifting move, and it was my specialty, though I dabbled in the clean and clean and jerk some. Weightlifting terminology is weird lol

    Point being, your max lift on a clean is not limited by your arms as much as you might think, even though you’d think that your grip strength is a hard limit. If you had a powerarm™ and did a clean, you’d still be limited my what your legs can do, right? That’s where you really explode from. Yeah, if your arms and hands are too weak, you can’t finish the lift, but having jacked arms ain’t gonna get the bar up

    But it doesn’t stop there, where it’s obvious that the lower body is the limit.

    Curls. Even single arm curls, you’re still using the rest of your body. The shoulder is engaged, the trap, pec and even lat on that side engage you stabilize and contribute to the lift.

    And, that continues in a chain all the way down to wherever body is in contact with the ground. Weight machines can shorten the path, but only by putting you in contact with the ground via the machine.

    You get CYBERPUMP ™ installed, and you’re still limited by whatever the bones and muscles it’s connected to can support. If you get too far over that, you could just end up with the

    So you don’t want a super powered arm. You want a prosthetic that matches your overall strength levels. If you want enhanced strength, it would need to be all over, via an exo-suit, or something similar.

    Now, the reason that your bro can’t get top end prosthetics that at least match as close as possible to a “natural” arm is that we live in a capitalist dystopia where we prioritize the profits of the few over actual benefit to the many. Not that an amputee would automatically get bleeding edge tech in an non capitalist world either, they’d end up on a waiting list until the very resource intensive high tech stuff was available, but still

    • Lost_My_Mind@lemmy.world
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      1 day ago

      we don’t have the tech to make an arm that can exceed human levels of strength without damaging something.

      What if I don’t need it to be gentile? Maybe I want to be Doctor Octopuss from spiderman, and just smash the city with big metalic arms. There’s nothing wrong with wanting to destroy the world, because this world SUCKS! Have you seen…ya know, things??? I don’t know a single person who’s like “Yes, things are certainly going well.”