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Joined 3 years ago
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Cake day: June 12th, 2023

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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.









  • The context: the UK ended slavery within the empire by taking out a huge loan to buy all the slaves in the empire, then freeing them. The loan wasn’t fully paid off until recently, so UK taxpayers were effectively paying for money that had been given to slave owners. However, it quickly and decisively put a stop to slavery in a lot of the world without much fuss or objection, when it otherwise could have triggered wars.





  • Cultural appropriation is something like McDonald’s advertising a new Indian burger and it’s just a beefburger with some chillies in it, i.e. someone’s attempting to gain from a bastardised caracature of the culture that wouldn’t be something someone from that culture would participate in. Right wing pundits intentionally misrepresented it as things like eating a traditional dish from another culture to make it sound stupid so people would dismiss it, and then people who’d only heard the misrepresentation but wanted to do the right thing or at least appear to be doing the right thing started acting like it was immoral to participate in any culture you weren’t born into.


  • 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.



  • I think it’s possible that loot boxes (and real-world equivalents like trading cards) don’t violate existing anti-child-gambling laws, but if so, that’s a flaw in those laws that needs to be fixed rather than an indication that they’re totally fine and should be allowed to exist in their current form. They cost money and give an unpredictable reward where different options have different perceived value, so they’re quite clearly gambling to anyone who defines it based on its characteristics rather than an individual territory’s specific legalese.



  • They stock things they make more profit on. If the margins on sugar water are much higher, then they don’t need to sell as much to make it worth stocking it instead of juice. If the margins are higher because consumers are unaware they’re being sold a cheaper-to-manufacture product for the same price because the packaging is deceptive to anyone who hasn’t been told they have to look or is in too much of a rush to have time to look, then shops end up full of sugar water that few consumers actually want.