• 2 Posts
  • 617 Comments
Joined 1 year ago
cake
Cake day: June 17th, 2023

help-circle
  • A modern nuke is FAR from the “bang 2 rocks together” designs that were first designed. For a start, most are fusion devices. Fairly exotic reactions are used to make a small amount of fusion material to go critical. This creates a shaped charge on a fusion core. The compression wave sets fusion happening, which releases 95% of the energy. Most of Russia’s arsenal is of this sort.

    The downsides of these is the use of exotic elements. They often have a short half life, e.g. tritium, with 12.5 years. This means they decay. Even worse, some of the byproducts will actually poison the reaction. E.g. Rather than producing a flood of neutrons, they absorb them.

    If any of this chain fails, then your fusion nuke becomes, at best, a low yield fission nuke. More likely, it becomes a dirty bomb. It’s still nasty, but not the city destroying terror weapon it would be intended as.



  • It’s a combination of both, I believe.

    The initial conditions had a definite rotational bias. This is preserved in the current orbital plane and direction.

    On top of that, anything massively off that plane is liable to hit or interact with the material in the plane, given enough time. It will be flung around, eventually either out of the system or into the plane.

    Stuff orbiting relatively close to the plane will have a biased pull towards the “average” plane. This will slowly flatten the orbits out.

    All these processes take a lot of time. The solar system, in general, has had enough time to settle. The ort cloud and other outer bodies are still quite chaotic. We see a lot more off plane than within the traditional solar system. They experience the latter effects far less, and so take longer to equalise. They still have a bias towards the initial spin however.




  • cynar@lemmy.worldtoFunny@sh.itjust.worksClever guy
    link
    fedilink
    English
    arrow-up
    5
    ·
    2 days ago

    My university basically gave up with a couple of professors. They hired a personal assistant, full time, just to try and keep them organised. They apparently settled on 3 phone calls, to make sure they made lectures on time. It even extended to things like reminding them to actually get their wives birthday presents, and personal book keeping.

    It seems the human brain has a capacity limit. The more specialist knowledge shoved in, the less room for more normal knowledge. Eventually it displaces even the most basic common sense.


  • The weirdest thing is that steam doesn’t have a natural or self reinforcing monopoly. It wouldn’t take much for another company to copy their business model, and provide a competitor. In practice, however, they all fall flat on their faces.

    Steam’s model is to give up short term gain for a smaller long term gain. Over time, this has snowballed into what we see now. Gabe is happy to get ever richer from his golden goose laying away. The competitors get started, then try and gut the goose for a quick buck.


  • Home assistant, as a central system (it basically let’s you wire anything into anything!). The smart switches etc should be esp8266 or esp32 based. You can then flash either tasmota or esphome to them.

    Since your server will likely be Linux based, it’s open source all the way to the bare metal, (or at elast as close as possible).

    My current system almost doesn’t notice if the Internet dies. Also, if you nuke critical components, in the worst case, it still defaults to dumb control behaviour (physical switches still work etc).

    I still know where the kill switches are however. I’ve also made sure it doesn’t have control of anything mobile, other than the robo vacs, and I’m fairly sure I could take them in a fight.



  • It’s depends purely on how it’s used. Used blindly, and yes, it would be a serious issue. It should also not be used as a replacement for doctors.

    However, if they could routinely put symptoms into an AI, and have it flag potential conditions, that would be powerful. The doctor would still be needed to sanity check the results and implement things. If it caught rare conditions or early signs of serious ones, that would be a big deal.

    AI excels at pattern matching. Letting doctors use it to do that efficiently, to work beyond there current knowledge base is quite a positive use of AI.


  • We have “family film nights”. We all have dinner together, then get out some beanbags, on the floor. We then all watch a film together, cuddled up on the beanbags.

    The films are ones our daughter hasn’t seen, and can often push her boundaries. E.g. we watched “Monsters Inc” together. She was a little bit scared, but with mummy and daddy there, she loved it.

    It’s definitely one for building memories together. We are too often distracted, even when present. Having dedicated family time makes a huge difference.

    Oh, and she also doesn’t watch much paw patrol, even when around friends. Apparently “Daddy doesn’t like it” is quite enough to put her off it. A classic “respect over fear” situational win for me.

    On a side note. The screen time correlation goes away, when you correct for the child’s parenting and lifestyle situation. It’s not “screens are bad” but that kids in worse situations watch more TV, etc. The causation is backwards.






  • Nukes and ICBMs are extremely complex devices. They also require extremely specialist servi e work to remain functional. Even worse, the only people who can actually check that work are the ones doing it.

    Russia hasn’t detonated a nuke in decades. I wouldn’t be surprised if most of their arsenal are now duds. The money embezzled, while boxes were ticked. Similarly, I wouldn’t be surprised if many of their ICBMs just wouldn’t launch.

    Russia’s nuclear capabilities are likely a paper tiger, and Putin likely knows this. Until they try and use them, they are scary. If they try and they fail, they are in a VERY bad situation.

    Putin is many things, but he’s not stupid. It would take a LOT more pressure from nato for him to even consider using nukes.


  • cynar@lemmy.worldtoScience Memes@mander.xyzDon't look now
    link
    fedilink
    English
    arrow-up
    2
    ·
    1 month ago

    You could detect decoherence in the system, that doesn’t indicate a human observer, however.

    That process is, however, used to protect cryptographic keys, transfered between banks. A hostile observer collapses the state early. The observer gets the key instead of the 2nd bank, which is extremely conspicuous to both banks.




  • cynar@lemmy.worldtoScience Memes@mander.xyzDon't look now
    link
    fedilink
    English
    arrow-up
    5
    arrow-down
    1
    ·
    1 month ago

    Depends on how you are observing it photons impart energy and momentum. The true, detailed explanation is a lot more convoluted, it’s all wave interactions, in the complex plane. However, digesting that into something a layman can follow is difficult.

    The main point I was trying to get across is that there is no such thing as an independent, external measurement. Your measurement systems minimum interaction is no longer negligible. How that is done varies, but it always changes the target and becomes part of the equations.