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Cake day: June 17th, 2023

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  • cynar@lemmy.worldtomemes@lemmy.worldHis legacy
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    3 hours 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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    4 hours 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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    7 hours 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.



  • It’s not perfect, but no system is. The goal is to keep a level of equibility, while also allowing the good to benefit from their own efforts.

    If the rich invest in their children, and make them exceptional, that’s fine. Trying to get parents not to do that goes against extremely strong instincts. The goal is to make climbing the wall harder, not impossible. If the child buckles down and takes advantage that’s fine. If they slack off and coast, they will coast back towards the mean income level. They won’t get the run away effect that happens currently.

    A lot more can be done at the bottom. Giving poorer children the education and support facilities needed to reach their potential would make a huge difference, for a relatively small investment from society.

    It’s also worth noting that I’m also an advocate for UBI. There should be a floor on how poor people can be. As a society, we can afford to support that.


  • Just an FYI, that goes all the way down the power chain. We tend to have less (instinctive) empathy for people below us. It’s not we actively want to do them harm, but that we just don’t think about them at all.

    E.g. when did you last take proactive action to help the exploited workers harvesting chocolate? You likely never even thought about them.

    The problem is that people like musk look down on us the same way. We get smashed by their indifference.

    The best long term solution is a tax system aimed at “regression to the mean”. I.e. exceptional people can get rich. However rich, “average” people will regress back towards average income and savings. Conversely, an averagely capable poor person should easily climb back up to average income levels.

    Basically change the graph from a hump to a bathtub shape.




  • 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.







  • A lot of the big building companies, in Europe, treat solar panels as a premium option and so charge a larger profit margin on them. Installing solar, while constructing the house is a LOT cheaper and easier than retrofitting them later.

    The panels have gotten cheap enough that it’s no longer a real cost burden, Vs the cost of the house.


  • A friend had an excellent (but evil) one.

    His son had found some more… interesting areas of the internet (aka porn). He collected a selection of his browsing history and sat him down. They then went, video by video, having an open and honest discussion about it. Dad had FAR more tolerance for mortifying embarrassment than his son did. He learnt to clear the history at least.

    The 2nd discussion, 6 months later, used the router logs instead.

    I’m not sure I would use this particular method. However, it was apparently highly effective at making his kids think things through (for better or for worse!).