• 6 Posts
  • 128 Comments
Joined 2 years ago
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Cake day: July 4th, 2022

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  • GrappleHat@lemmy.mltoPrivacy@lemmy.mlCar Privacy is Shit
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    2 months ago

    Depending on the car you might be able to physically disable telemetry. Here are some thoughts/ideas I’ve been collecting:

    • Hit “SOS” button and opt-out of all services through customer service. This of course requires trusting the company to actually do it.
      • It’s possible that the info could be stored locally and then uploaded when it gets serviced though
    • Remove the fuse to the modem/data communication module (DCM)
    • Disconnect wiring to the LTE antennas
    • A number of people have mentioned that they can get the dealer to disconnect the telemetry as a precondition to buying. For instance, here.
    • Jump the data communication module (DCM) cable with a ~$70 dongle to bypass just the telematics components
    • Disconnect the DCM cable, which will likely gimp the infotainment if not other systems, or remove the entire DCM unit

  • GrappleHat@lemmy.mltoAsklemmy@lemmy.mlComplexity
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    2 months ago

    The part you remember was not about eating the animal due to hunger. He was observing that when he was away from “civilization” for long enough he noticed that he started to think in a more primal way. In that case, it was tearing a squirrel to shreds raw with his teeth! (or something) :)













  • A couple of ideas:

    Encoding holograms

    • Model the object in 3D space (using Blender maybe?)
    • Use the Angular Spectrum algorithm to model light propagation, its interaction with the object, and it hitting the recording medium.
    • Your final recorded hologram should have two maps (aka “images”) across (x, y): a map of the light’s amplitude and another of its phase offset. This is your recorded hologram.

    Decoding holograms:

    • Use the angular spectrum algorithm again except reverse the light’s propagation direction. The amplitude and phase maps from the encoding phase are the initial conditions you’ll use for the light.
    • The light’s amplitude and phase information you calculate at various planes above the recording plane are the 3D “reconstructed” image.

    Last thought

    Holography is often used to record information from the real world, and in that process it’s impossible to record the light’s phase during the encode step. Physicist’s call it “the phase problem” and there are all kinds of fancy tricks to try to get around it when decoding holograms in the computer. If you’re simulating everything from scratch then you have the luxury of recording the phase as well as the amplitude - and this should make decoding much easier as a result!