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Cake day: June 17th, 2023

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  • cynar@lemmy.worldtomemes@lemmy.worldChat, are we cooked?
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    1 day ago

    They also happen to be a (retired) nurse themselves. It’s uncommon, but not that uncommon. Most nurses would have seen it before. Its only for 5-10 seconds after waking up. Coming from a relatively skinny woman is quite a bit more unexpected. She also has unusually good aim.



  • I saw a talk from someone working in the field a few years back. The “fusion is only 10 years away” had a small proviso “if fully funded”. The actual funding was barely enough to keep the lights on.

    That has now changed. It’s gotten close enough that private investment has decided it’s worth investing in. I believe the only really big problem left is the wall material. The neutron flux transmutes the elements making it up. This makes it difficult to maintain a hard vacuum, since the wall can start leaking and/or outgassing, forcing a shutdown to replace them. On a minor plus side, if you dope the walls with mercury, it transmutes to gold, in commercially viable amounts!

    Fusion has several advantages over fission. The biggest is the impossibility of a meltdown. The very difficulty in balancing the reactor means that it shuts down fast and mostly clean. This would let them be placed far closer to population centers. They could provide a base load supply, in the way nuclear could/should have.


  • cynar@lemmy.worldtomemes@lemmy.worldHis legacy
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    3 days ago

    The bacteria don’t need to be identical.

    Think of it like rolling a dice. Any given roll can only have a single number. However patterns can be detected by combining multiple rolls. E.g. a biased dice.

    As for larger things. It’s possible, but the speed required goes up with mass, and not linearly. In theory a person could go through. They would be moving a significant fraction of the speed of light however. Catching them alive on the other side would be… difficult.


  • cynar@lemmy.worldtomemes@lemmy.worldHis legacy
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    3 days ago

    Only 1 bacteria ever arrives. It’s the probability wave that interferes with itself.

    With the Young’s double slit experiment, if you fire a single photon, you get a single photon arriving. It looks just like how a cannon ball flies. It’s only when you let hundreds go (either collectively or individually) that the interference pattern appears.

    The end pattern is the probability that the photon (or bacteria) arrives at any given point on the receiver screen.


  • cynar@lemmy.worldtomemes@lemmy.worldHis legacy
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    3 days ago

    Anything moving has an associated wavelength. If that wavelength is long enough, you can do the young’s double slip experiment on it.

    It was a few years ago, so the details are hazy. A scientific team accelerated a particularly small and sturdy bacteria fast enough that their speed produced a viable wavelength. They then sent the stream through 2 slits. They then captured the bacteria in aerogel (I think) to slow them back down.

    Most didn’t survive, but some both survived, and ended up somewhere they couldn’t without interfering with themselves. They successfully reproduced afterwards. The debris also followed the classic ripple pattern of the experiment.

    Basically, there is nothing special about “life” when it comes to quantum mechanical effects, other than it’s on the big side.



  • There are 2 parts at work. The focus reflex and the blink reflex. The window between them is the dangerous part. If the pulse is fast enough ( a few ms) then the eye can’t focus, and it’s fairly safe (unless you were already focused on the emitter). If the pulse is low enough power then the blink reflex kicks in and protects your eye.

    Hitting a mosquito is a hard task, tracking one is even harder. It’s better to use an ultra short pulse, with a bit more power. You can also shift the frequency. If it’s an infrared laser then the eye won’t lock onto it, and will struggle to focus it dangerously.





  • I’d argue they didn’t, they just changed.

    There are 2 groups worth noting. Government and private.

    Government assassination is still a thing. Israel has used it aggressively over the last few decades. There are also signs that china has too. That’s just off the top of my head. It’s also worth noting that drone strikes etc can fill the same roll as an assassin.

    Private has definitely changed. I suspect the high profile assassinations have stopped. Low level ones just had to get a lot better at not looking like assassinations. The ever classic boating accident being a good example.

    The change is mostly from improvements in policing. You can no longer just move to another city to escape the law.

    It’s also worth noting that a lot of society has changed. It used to be that a country pivoted on its leader. Now, it’s a lot more reliant on formal structures. Taking out a leader doesn’t have the same, devastating effect it used to. Iran being a good example.