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Cake day: July 20th, 2023

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  • No, never. Current charging rates already get close to thermal constraints. Hitting those charging rates either requires accepting much lower power density or using way more metal per cell. This research might inform design changes to improve charging rates, but we’ll never see high capacity batteries charging in a minute.

    The researchers know this and only mention wearables and iot devices applications. The article author erroneously makes the leap to high energy density devices.

    If you don’t care about energy density at all, ceramic capacitors can already charge and discharge in microseconds.








  • I think they would have to be able to actively jettison all the modules. For one, a loose cluster will be really hard to predict the impact zone. NASA does try to make sure debris falls over large areas of open ocean.

    But I also think it isn’t operationally workable. I don’t think the joints can be remotely disconnected. That means your suggestion requires having crew on board or maybe even doing a series of spacewalks to do this work. I don’t think NASA would be ok with having a bunch of loose and uncontrolled modules in the vicinity of crew spacewalking and eventually a departing capsule. It would be really hard to manage collision risk in that scenario.

    So I think either they would try to ditch the solar panels in a controlled fashion so they can more accurately deorbit the whole thing into the pacific, or they’ll have to develope small bolt on thruster packs that can safely jettison the modules 1 by 1.



  • EUV was really hard to crack, but now that they have it working, refinements seem to be going well.

    Also, the size of features hasn’t actually shrunk all that much from 32nm. What has really improved is the geometry of the transistors and wiring. This allows them to pack many more transistors in the area even if the lithography resolution hasn’t actually increased 16 fold. The 2nm name is just describing the relative increase in transistor density compared to the old layouts and densities.

    ASML, TSMC and Intel are doing great work though. My comment is not meant to diminish what they’ve accomplished.




  • Error correction relies on the majority of values to remain unchanged. I don’t think that assumption holds for qubits at room temperature. I’ll admit that I’m not well read enough to be certain.

    Room temperature superconductors would be great for a lot of applications, but I don’t think they do that much to enable quantum computing.

    Afaik superconducting quantum computers are operated well below the critical temperature for copper. They wouldn’t go through that extra effort if it wasn’t necessary.