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cynar

@ cynar @lemmy.world

Posts
2
Comments
455
Joined
3 yr. ago

  • Nvidia CEO: Society needs new 'new social norms' in the age of AI. I used to play in the streets. When cars came along, you obviously can’t play in the streets now

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  • It happens in the UK too. Kids play in the street, and get out of the way, if someone needs to drive through or park. Conversely, car drivers keep the speed down and give the kids time to get out of the way.

    Everyone wins, and no, it's definitely a road not a path.

  • Trump Celebrates Achieving Absolutely Nothing in Iran

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  • The leopard stuck its face into an industrial cheese grater. Then complained it attacked first.

  • What do you know of something like this?

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  • It reminds me of the ftl core in "event horizon" it also throws the ship through hell (literally).

  • Let me check things out [Beetle Moses]

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  • 10m is deep enough to have to consider the bends (decompression sickness). That's definitely into diving rules territory.

    The particular risk is it cutting off, due to the battery dying, forcing a rapid ascent.

  • What dumb line/joke may live in your head forever?

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  • "What's big brown and sticky?"

    "A big stick"

    "What's brown, and hurts if it falls on you from a tree?"

    "A piano"

  • Consciousness [SMBC]

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  • It gets extra fun if part tries to break away and elect a new spokesperson.

  • Chat, are we cooked?

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  • 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.

  • Chat, are we cooked?

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  • I know someone who has had quite a few general anesthetics. They've taken to warning the nurses involved that they are a puncher. Several have not taken it seriously and ended up with some impressive bruises (including black eyes).

  • South Korea’s artificial Sun ran for 102 seconds and it could change the future of energy

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  • 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.

  • His legacy

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  • 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.

  • His legacy

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  • 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.

  • His legacy

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  • 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.

  • His legacy

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  • They have also experimentally tested an equivalent experiment with bacteria. They survived a trip through the double slit experiment.

    There doesn't seem to be an issue with it, other than it's difficult and impractical.

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  • Silicon's conditions would make it difficult. It has far less inorganic precursor molecules to work from. It might work under cryogenic conditions, but that has a bunch of other problems.

    The titanium one is new to me, and potentially interesting. My concern would be an abiogenic pathway. It might be able to form interesting molecules for life, but if they don't appear naturally, then getting life started gets massively more difficult.

    There's also a hell of a lot of options with carbon based life. Earth life is VERY locked into a few variants with our base biochemistry. E.g. there's no reason for particular RNA sequences to match particular Protein peptides. Yet it's basically a universal thing. Even chirality is fixed, for no particular reason other than mixing causes issues.

    I could potentially see a dual based life system working, effectively a more advanced version of how some creatures use metals to make shells etc, or how horns and hair grow. It could also provide a viable (though extremely convoluted) bootstrap process for titanium life, or something more exotic. Forcing life to change its core functionality however is apparently quite difficult, since no life on earth seems to have done so and survived to be detected. Rocky, in Project Hail Mary, would fall into this group (a carbon life core basically piloting a stone and metal mech).

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  • What combinations are you thinking of?

    Life on earth is based around Carbon chains. Carbon's 4 bonds allows for a low of complex structures that would be hard/impossible for less bonds.

    The only other viable option I know of is silicon. Unfortunately its chain equivalent has an extra reaction pathway with water. It would degrade rapidly if exposed to water, which is very common at the energies it would work at.

    I'd be curious to look up any other viable options.

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  • The uncanny valley is FAR stronger with moving things Vs inanimate ones. It's likely modified from a revulsion of dead things, but seems to be distinct now.

    Most diseases don't show strongly enough to trigger it, most of the time. Historically, the exception has been leprosy. I'm honestly curious if it's evolved to keep us clear of leppers specifically or not.

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    Engineer builds AI laser defense system that wiped out every mosquito in his home

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  • 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.

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    Engineer builds AI laser defense system that wiped out every mosquito in his home

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  • This idea was tried previously. If done right, it doesn't take much energy to damage a mosquito's wings.

    Secondly, a laser is only a real issue for vision if the eye focuses on it. With a continuous beam, it would be instinctive, making it dangerous. If the pulse is short enough however, the eye won't have time to focus and so the power will be safely spread out, even inside the eyeball.

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  • I'd also be fascinated if we figured out a way to do it

    I personally suspect it's not common in the animal kingdom. It's quite likely a defense against leprosy, a disease that is most dangerous in larger society type communities, without outside predators (to pick off the sick).

    That theory might be wrong however. Its distribution would tell us a lot about what it defends against.