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Cake day: June 15th, 2023

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  • Only really counts for feet and inches. But yes, having your base unit be divisible by halves, thirds, quarters, sixths, and twelths with whole numbers of sub units is highly useful when fabricating objects when you don’t have access to modern tooling and supplies. In fact I would argue base 12 is the superior numerical system that was abandoned for metric and we have lost something in the meantime. Though Jan Misali might disagree with his love for sexinal.

    Imperial units do have another advantage to this day, though. When talking about machining bolts and threads Imperial use threads per inch or threads per unit length while metric uses the pitch of the thread, so mm in-between threads. This decision means that when machining imperial nuts and bolts we by default pick whole numbers of threads per inch which due to the circular nature of lathes means that a simple clock dial can keep the lead screw synchronised with the head. Since metric uses pitch we pick numbers like 1.25mm pitch which does not always synchronous well with the lead screw and head and requires some odd gear ratios to cut specific threads.


  • Signal protocol is what you’re looking for. Started as text secure then changed name eventually. Whatsapp was never opensourced they just used the Text secure (now signal) protocol for their encrypted messages. They still allegedly use the signal protocol, I think, but with it being fully closed source and not implementing current signal feature for years afterwards.

    In other words I have a high degree of faith our nuclear secrets will only be leaked to me when our DUI hires add me to the group, again using signal. But guarantee they’re also leaked to the Zuck using whatsapp.



  • ultracritical@lemmy.worldtoScience Memes@mander.xyzTURKEY POWER
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    6 months ago

    Uranium is present in coal in high enough quantities that a coal plant releases more uranium to the environment then an equivalent nuke plant burns in its reactor, and mining for materials for solar panels creates literal mountains of thorium salts and other thorium contaminated debris.

    Nuclear plants have the unfortunate position that they actually have to manage their nuclear waste due to its concentration. It’s not actually hard to store the waste permanently from a technical perspective, it’s just difficult to have the political will to actually do it.



  • At 85 dB you’ll have hearing damage from long term exposure without hearing protection. Normally considered 8 hours a day 5 days a week. So 2000 hours in a year. Higher sound levels have a lower threshold so shorter times. 120 dB is the threshold of pain, so immediate hearing damage. Also, dB are a 10x log scale. So every 10 dB is an order of magnitude increase. So the siren is actually about 3000x louder than when you should start wearing earpro.