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AnyOldName3

@ AnyOldName3 @lemmy.world

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315
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3 yr. ago

  • Japan finds a way to recover 90% of lithium from old EV batteries

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  • Chemically, Sodium and Lithium are very similar, so any improvement that applies to one should be pretty applicable to the other. That's actually one of the main strengths of Sodium batteries - most of the research that's already gone into making Lithium batteries can be reapplied with minor tweaks. However, Sodium is inherently larger and heavier than Lithium, with fewer atoms fitting into the same space and those atoms weighing more. If research for Sodium batteries catches up with Lithium ones, they'll still be worse just because of that, and at that point, research would get easier gains from improving Lithium batteries than Sodium ones.

  • Japan finds a way to recover 90% of lithium from old EV batteries

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  • Sodium batteries aren't seriously expected by anyone to supplant Lithium ones. The two things Sodium can theoretically do better than Lithium are being cheaper as a raw material, and working well at low temperatures, but it's always going to be heavier and larger for a given capacity. Most applications for batteries care about their size and weight, and so the extra cost of Lithium will be worth paying.

  • Japan finds a way to recover 90% of lithium from old EV batteries

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  • Under modern physics, Lithium is pretty much the best possible chemical to build batteries out of. Anything else that might be better won't be a chemical battery, and it's not like there's any reason to suspect some new magic thing will be created like a pocket-size fusion reactor that will make chemical batteries totally obsolete any time soon. Decades more of lithium batteries being relevant are as close to guaranteed as can be.

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  • He was governor of the Bank of England for a while, so he's not totally unrelated to the UK.

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  • Isn't an adult pretending to be a child in porn already illegal? That seems like something that would always have been illegal.

  • Firm quietly boosts H.264 streaming license fees from $100,000 up to staggering $4.5 million — backbone codec of the internet gets meteoric increase, AVC hikes follow disastrous H.265 licensing increa

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  • The justification for patents is that after a (relatively) short period of being under patent, because patents have to disclose how inventions work, the idea isn't secret and anyone can use it. The patent system is the whole reason why companies don't and can't hide their inventions anymore. If we just got rid of the patent system wholesale, they'd go back to keeping things secret. That might be a big problem, or it might mean that, because anything that's been reverse-engineered would be fair game, more things end up available sooner, depending on whether companies can obfuscate things well enough that it takes longer for a hobbyist to figure out than the patent would have to expire.

  • Firm quietly boosts H.264 streaming license fees from $100,000 up to staggering $4.5 million — backbone codec of the internet gets meteoric increase, AVC hikes follow disastrous H.265 licensing increa

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  • Technically it's just that particular English translation that's copyrighted. The original text is public domain.

  • META POST: MOTION TO MAKE A RULE THAT CROPPING THE ARTIST'S SIGNATURE IS AGAINST THE RULES

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  • Unlike Reddit, it's possible to edit the link a post links to after the fact, so it's possible to swap in an uncropped link later instead of just removing the post.

  • TIL chicken sold in supermarkets are often "plumped" with a salt water solution to increase sell weight, making up as much as 30% of the total weight, and can contain up to 500mg of sodium per serving

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  • In a lot of the world, chicken isn't typically sold like this and people aren't doing it themselves. If it ends up dry, it's taken as a sign that it's overcooked, not that it should have been brined.

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  • One of the stills from one of the videos that the BBC showed identifying it as a Tomahawk showed it at a very un-cruise-missile way up, so it could just have malfunctioned during terminal guidance or been clipped but not destroyed by air defence, and then hit the wrong target. It could also just have been a governmenty-looking building close enough to an intended target that whoever was checking it didn't notice it wasn't the target. It's a lot easier to get everything right when the whole mission is to hit one person with one missile when everyone's got enough time to do their job perfectly and everything's been rehearsed than when there are thousands of targets and people are doing things in a rush, especially if orders are coming from people who don't care about international law.

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  • There's nothing inherent to small components to suggest that you have to review them. If they're small, it's easier to tell yourself that the LLM probably got them right and you're justified in not checking.

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  • Using an LLM to write tests and small components is still vibe coding.

  • might be a form of Jevons Paradox

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  • Premature optimisation often makes things slower rather than faster. E.g. if something's written to have the theoretical optimal Big O complexity class, that might only break even around a million elements, and be significantly slower for a hundred elements where everything fits in L1 and the simplest implemention possible is fine. If you don't know the kind of situations the implementation will be used in yet, you can't know whether the optimisation is really an optimisation. If it's only used a few times on a few elements, then it doesn't matter either way, but if it's used loads but only ever on a small dataset, it can make things much worse.

    Also, it's common that the things that end up being slow in software are things the developer didn't expect to be slow (otherwise they'd have been careful to avoid them). Premature optimisation will only ever affect the things a developer expects to be slow.

  • How to properly get rid of holes between perimeters?

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  • It's got an option called Precise Wall that's supposed to improve dimensional accuracy that at least seems to work in my experience (although I've not compared it to the results from other slicers).

  • How to properly get rid of holes between perimeters?

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  • The right flowrate for dimensional accuracy is likely not the right flowrate to end up with solid parts where internal lines are properly smushed together. The sides of a 3D printed object aren't flat, so if you adjust the flow rate so that the bits that stick out the most are exactly where you asked the slicer to put the edges of the wall, you end up with your internal lines just barely touching each other instead of properly bonded. You want to tune your flow rate to get solid parts when you ask for them, set the line width a little wider than your nozzle to give space for material to flow outwards (which happens whether or not you want it to, but things work better if you tell the slicer it's going to happen), and then when you've got a part that really needs the dimensional accuracy to be right, maybe temporarily use Orca Slicer instead to get its precise wall feature.

  • LLM Idolatrine: Why no one wants your agentic PRs

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  • Everyone starts off without references, and there's already less of a pipeline from user to helpful contributor to fellow maintainer than most projects want without having to add more chokepoints. There isn't a solution without downsides while there are people using LLMs.

  • What phrases/sentences instantly reveal someone as a chud?

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  • It's not particularly wet, which is why fire fighters add a wetting agent to make wet water to extinguish fires more effectively.

  • Yay, milkshakes!

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  • They don't take all of it, so if they're doing what they're supposed to, nearly all the crabs will be returned to the ocean within a few days and eventually be fine again. Some do die, though, and even if they don't, they're worse for wear after the process, and some companies have been accused of taking all the blood and then selling the dead crabs as fishing bait. There's an artificial alternative available, but regulators aren't all convinced it's as effective, so it isn't used universally yet.

    https://en.wikipedia.org/wiki/Horseshoe_crab#Use_in_medicine

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  • There's no point retaliating once you're dead unless the enemy knows it's something you might do. You also can't make a plain A-bomb arbitrarily big as you need the fuel to be small enough to be subcritical until it's assembled, and simple enough to assemble that it spends so little time critical but not supercritical that a random decay doesn't cause a chain reaction to start before the mass is fully compressed. If it starts too early, there's enough energy to blow the bomb apart, which stops the reaction continuing. The more material you add, the more often random decays happen, and the likelier it becomes that the reaction starts prematurely. The theoretical limit is somewhere between 500kT and 1MT, which isn't very much for a city buster, especially if you've buried it. You'd have to use more than one, but a pure fission bomb is very senstive to nearby nuclear detonations, so only the first one would be likely to work.