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Joined 1 year ago
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Cake day: June 10th, 2023

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  • ch00f@lemmy.worldtoMemes@lemmy.mlUh-oh.
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    18 days ago

    Ok but something that’s really bothered me about A Quiet Place (besides the writing being god awful).

    When she’s giving birth in the bathtub, the lights start flickering. They provide no explanation for why the lights are flickering. It’s legit just a scary movie trope in-action.



  • Heh, I guess I should have phrased that differently.

    But yeah, it’s actually really courteous. Sometimes a little too much. It’ll move over to the left side of the lane if it sees a cyclist or pedestrian on the shoulder to the right. Unfortunately, it doesn’t understand when there’s a 3 ft concrete barrier between me and the pedestrian and will do it anyway. Makes some narrow bridge crossings a little scarier than necessary.


  • The first Model X has Autopilot 1 which was a system designed by Mobileye. Tesla’s relationship with Mobileye fell apart and they replaced it with an Nvidia based system in 2017(?). It was really really bad at the start as they were essentially starting from scratch. This system also used 8 cameras instead of the original 1.

    Then Tesla released AP hardware 3 which was a custom-built silicon chip designed specifically for self-driving which also enabled proper navigation of surface streets in addition to the just highway lanekeeping offered in AP1. This broadened scope of actually dealing with turns and traffic from multiple angles is probably where the reputation of it being dangerous has come from.

    My HW3 enabled Model 3 does make mistakes, though it’s rarely anything like hitting a pedestrian or running off the road. Most of my issues are with navigational errors. If the GPS gets messed up in the tunnel, it’ll suddenly decide to take an exit that it isn’t supposed to, or it’ll get in the left lane to pass someone 1/4 mile from a right-exit.


  • There was an extensive amount of refurbishment required to re-use the SRBs. Not to mention they had to be physically recovered, and salt water certainly made the process more complicated.

    The shuttle itself needed each of its heat shield tiles replaced, which due to the shape of the shuttle were all unique.

    The fuel tank was not reused.

    The shuttle was meant to be a leap forward in rocket reusability, but it didn’t really pan out that way. There’s good reason the program was scrapped and not replaced with another space plane.

    The Starship booster has the potential to launch multiple times per day. The only refurbishment period is how long it takes to refuel it.



  • Moore’s law factored in cost, not just what was physically possible.

    The complexity for minimum component costs has increased at a rate of roughly a factor of two per year. Certainly over the short term this rate can be expected to continue, if not to increase. Over the longer term, the rate of increase is a bit more uncertain, although there is no reason to believe it will not remain nearly constant for at least 10 years.








  • The solar sail reflects light instead of absorbing it so you get to double dip on photon momentum.

    And sure, you can steer with the laser I suppose, but with that kind of super weak deltaV, you’re not going to be exactly doing donuts in the solar system.

    Even the massive solar sail only imparts a super small amount of force. It’s only useful because it does so for free over a long period of time with no air resistance.

    You’d be better off using a conventional thruster to do whatever steering you needed to do before letting the sail take over. It’s not like you need to steer around any obstacles.



  • ch00f@lemmy.worldtoTechnology@lemmy.worldHow can we return to techno-optimism?
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    2 months ago

    I ditched my smartphone spring of 2023. Still use it on WiFi at home, but every time I leave the house, I only carry a fliphone.

    Every time a stranger asks me about it, they say something like “I wish I could ditch my smartphone.” Like I get it. It’s not easy. I can’t even go to a baseball game unless my wife has our tickets on her phone. Paying for parking sometimes requires an app.

    Yet apparently everyone hates this thing that they are now required to carry around.

    How did we get here?