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Joined 2 years ago
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Cake day: June 22nd, 2023

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  • I see, yeah there is something about it in the blurb. How do you like the tablet? Is it responsive? Is it full of Android bloatware? Do you know if it is rootable?

    I see there is a 14 inch version that’s about $300 and that starts to get interesting. It’s not “2nd gen” though. And, I had thought of TCL as a lower tier manufacturer with quality issues, but I hadn’t looked into it much.

    I like that the tablet has an SD (probably microSD) slot. Don’t like that there’s no headphone jack. There’s plenty of space in those things compared to a phone.





  • Currently known forces splitting at low energies, and hidden 5th force: nobody knows. Physics is an observational science and right now there aren’t any observations that suggest such forces, but never say never.

    Star wars force: come on, it’s fiction.

    Gravity incompatible with QM: basically, quantum field theories are developed by starting with classical field theories (say electromagnetism) and doing some mathematical transformations called “canonical quantization” and “second quantization” (these have wikipedia articles). In the 1920s through mid-1940s this worked well for electromagnetism, and made good predictions except it broke down at very small scales, giving “infinity” as the answer to calculations that should have been finite. In the late 1940s a scheme called renormalization was developed, that allowed cancelling out the infinities and getting very precise answers. That was called quantum electrodynamics (QED). Later this was extended to the strong and weak nuclear forces, giving the standard model (SM). That was harder, but same basic idea.

    The trouble with gravity is that when you perform quantization and then renormalization, the infinities still don’t go away. That’s what the incompatibility means. There are a lot of alternate proposals like string theory to quantize gravity, but it’s all very speculative for now.

    As for detecting gravity waves but not gravitons, it’s similar to the situation with visible light. As far back as the 1700s(?) it was possible to combine light beams and see interference patterns, thus confirming the existence of light waves. Light “particles” (photons) are much harder to detect and I think this was first done convincingly by Einstein’s explanation of Brownian motion around 1900 (before relativity). Current gravity wave detection works by measuring interference, if I understand correctly.

    Disclaimer: I’m no expert and I haven’t made any progress in understanding this stuff beyond the handwaving level that you see above.

    Added: you might like John Baez’s videos about the standard model, https://www.youtube.com/@johncarlosbaez_edinburgh













  • solrize@lemmy.mltoPrivacy@lemmy.mlPrivate digital photo frames?
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    10 days ago

    digital photo frame seems like an ideal way to do that.

    What? What’s wrong with either just putting them on a web album and letting the family browse them, or else sending actual physical prints? I certainly wouldn’t want a digital frame in my living room with someone else controlling what it was showing.