• 8 Posts
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Joined 2 年前
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Cake day: 2023年6月11日

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  • You can’t. You can, however tell if a particular URL is believed to be dangerous by any of several organizations that track such things.

    Your browser probably has something built in; Firefox and Chrome do, for example. If you attempt to visit a known-bad URL, the browser will warn you and make you click through the warning before you do. Some other comments in this thread suggest third-party services that will also do this, and may even attempt to check the content found at the URL for known malware.






  • I encountered an infuriating example of the opposite a couple years ago: a gas stove that wouldn’t work without electricity.

    A gas stove normally operates with a mechanical valve to control gas to each burner, and while modern ones have electronic igniters, it’s possible to use a match or the like instead. These assholes went out of their way to add an electronic valve that shuts it off when there’s no power. It’s probably in the name of safety, but the scenario where someone leaves the valve open without igniting the gas is possible even with power by failing to engage the igniter correctly, and gas is smelly.

    I should be able to use a gas stove when there’s no electricity or the igniter is broken if I supply my own source of ignition.


    For your example of a flashlight, consider one with USB charging. If the charging port or circuit fails, I should be able to easily take out the battery and charge it in another charger (Li-ion charging is pretty standardized). If the battery is dead but the USB port works, I should be able to use it as a USB-powered lamp.




  • Quite. Unfortunately, most devices that use modern batteries have the battery sealed inside with an onboard charging system, such that when the battery wears out, the device becomes e-waste. There are many standard, or semistandard sizes of cylindrical lithium-ion cells, and devices could be designed for field-replaceable versions, but the only product category where it’s common is high-performance flashlights.

    Even in common consumer form factors, there have been improvements. Here’s a test of one of the best alkaline AAs. Note how the capacity drops as the load increases - by a factor of about six at 3 Amps. Contrast the Eneloop NiMH rechargeable, which has less capacity under light load, but barely loses any at 3 Amps and can handle 10 Amps while retaining most of its capacity.

    The best Li-ions in a form factor similar to AA, called 14500 have even better performance with over 5 Watt-hours of energy, but devices have to be designed for them since the voltage is much higher; putting one in most devices designed for AA will result in damage, if not fire.


  • We know reddit used bots at the beginning to generate activity to make the site look popular.

    That’s not quite it. The founders made a few of throwaway accounts and posted a bunch of links that exemplified what they wanted people to post. It was fake activity, but I’m pretty sure it wasn’t automated. It was maybe 50 posts and I don’t think it was a bad thing to do.








  • Yes. I could talk about quantum indeterminacy as a scientific argument for it, but fundamentally, I believe in it because I want to[1]. I don’t like the idea of being a deterministic machine with a fate I can’t influence with active choices. It’s not provable either way with the current state of science, so I choose to believe my preferred option is the correct one.

    [1] Of course such a statement presumes free will. I think I want to, anyway.