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Cake day: July 16th, 2023

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  • scratchee@feddit.uktoScience Memes@mander.xyzoh cool
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    11 days ago

    The big sci fi win in stargate is how highly they rated internal consistency and having a scientific basis where possible. Apparently that was mostly because the actress playing Carter absolutely refused to tell bullshit gobbledegook and forced the writers to do it properly.

    It’s subtle, and not always perfectly followed, but if you take the episode where they gate to the black hole, they have significant screen time justifying why the time dilation is so strong when the gravitational effects are so weak. It shouldn’t work that way and they acknowledge that explicitly, but obviously they wanted a fun time dilation story so they call it out and explain it as an unexpected side effect of the gate wormhole. So sure, they sometimes make science do what they need it to do for the story, but they try hard to justify it.

    Star Trek meanwhile barely follows its own rules most of the time, let alone actually acknowledging real physics




  • I’m disturbed by the generic anti-war reference, it will depend how they clarify their position going forward. I’m ok with distancing from the ongoing Israel mess ofc, but I don’t see a low-military solution to Russia, at least any time soon. and I’m not sure I can vote for anyone advocating a reduction in military capability whilst Russia is building towards being a threat to Europe and therefore us.

    Don’t get me wrong, I want a peaceful solution. I just can’t see one that doesn’t involve having a big stick to disincentivise Russia. I’d rather throw more money on a military that does nothing than hope that nonmilitary encouragements will work (ofc happy to have those too, but they didn’t work on the Nazis, and we don’t want another Neville Chamberlain-style appeasement scenario).

    Of course, detailed opinions on complex issues weren’t going to make it into a statement this short, so I’ll wait and see, but I’ll be disappointed if I find I can’t support them just because they’re not taking Russian aggression seriously.


  • The company did many things wrong, it’s an almost idealised example of total failure to take software seriously.

    Most importantly they decided they didn’t need to test the software on their new machines because they’d already shipped previous machines running the software, so they “knew it worked”. The previous machines had hardware interlocks that made it impossible for the software to cause a massive dosing errors, the new machine was entirely software controlled.

    Also they had exactly 1 “very smart” engineer build the software, who obviously wrote it for a hardware-safe machine. To be fair, I’m sure he was very smart, but safety critical and solo projects are not a great combo.

    Also they had no mechanisms to ensure failures would be communicated to their engineers for investigation (failures were reported to them and then dropped into a black hole and forgotten about).

    Also they didn’t even have any capability to test their machines after failures started popping up, because they knew the code worked perfectly so they didn’t need to waste any time or money on qa capability, massively slowing down their ability to fix things once people started dying






  • scratchee@feddit.uktoScience Memes@mander.xyzLittle Pea Shooters
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    1 month ago

    You mentioned “from the perspective of the planet” before, and I think perhaps that’s the key, from the planet’s perspective you fall and rise with equal velocities and equal accelerations, but crucially the planet is moving relative to other things and curves your orbit, so whilst you might might have the same falling and rising speeds relative to it, they’re not in the same direction, so your velocity has changed, and from an external perspective you’ve gained velocity from it.

    Imagine you start stationary relative to the sun, with Jupiter barrelling towards you (not on a collision course!). From Jupiter’s perspective you fall towards it, and so from the suns perspective you gain velocity opposite jupiters orbit, but you’re not directly head on so it twists your course (let’s say 90 degrees to keep things simple) then as you leave Jupiter it indeed decelerates you relative, but crucially you’re in a different direction now, (from jupiters perspective) you’re pointed right towards the sun, so as you pull away Jupiter is decelerating you in the sun direction (aka accelerates you away from the sun). So you were both accelerated in the anti-Jupiter-orbit direction and then again in the anti-sun direction. Added together those give you a vector which is non-zero, so you’ve gained speed from Jupiter.

    If your orbit didn’t curve (eg if you could pass straight through the middle of Jupiter without colliding) I think perhaps it’d cancel out its own effects on your velocity, though I’d need to check to be certain…


  • scratchee@feddit.uktoDad Jokes@lemmy.worldCount on it.
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    1 month ago

    I think that was a post-Rome change that later got changed back again.

    Before the 5th century/fall of Rome it was January, and we had a 1200 year long flight of fancy with March new years before finally returning to the January start the Romans picked for us.





  • Stealing human remains is illegal, but selling (correctly sourced) human remains is legal.

    I think their point is that it’s very hard to prove bones are illegally sourced, meaning they can only prosecute if they’re able to prove the bones were sourced illegally.

    If instead it was always illegal to sell human remains (presumably with exceptions for medical/educational purposes), that might make policing them somewhat easier.

    An alternate strategy might be to require strict tracking for human remains - you can sell a skull but it must have a certificate listing the full chain back to its original owner (presumably deceased). Failure to retain that chain of custody gets you in legal hot water regardless of how you obtained it. Possibly with a little extra security to prevent duplicate use of legitimate certification. (eg each sale is logged with a trusted 3rd party so you can’t keep claiming that every skull you sell is the same guy until one of them gets inspected, forcing you to find a new legitimate doner to act as cover).