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Cake day: June 14th, 2023

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  • I did a course in photolithography, including a lab session where I literally made an unpackaged ASIC by hand, using technology that was current in the mid 90s. Etching silicon and doing photolithography is completely out of the reach for a hobbyist, even from scratch, even with 30 year old technology. Reusing a random chip and adding to it is simply impossible.

    Essentially, you are looking at the following problems with simply creating a new chip:

    1. Need access to a large clean room
    2. Need a furnace that can heat up your silicon wafers to silly temperatures in order to do doping via sputtering.
    3. Need chemical handling equipment, including safety gear required for handling hydrofluoric acid.
    4. Need a photolithography device with your designs.
    5. Need to cut, test, and package chips after they are created.

    And the additional problems with using an existing chip:

    1. Need to decapitate the existing chip and remove it from the package.
    2. Need to work with a single already sliced chip instead of a wafer.
    3. A completed chip will have metal vias that cover a large portion of the silicon, you would need to perform your chemical etching without harming these or any silicon that has been used.
    4. Generally, Asics don’t have wasted space, but simply larger components. There would be no footprint available for your design, even if your hobbyist tooling was smaller than the one used for the components, which is probably wouldn’t be.


  • I suppose that the most likely scenario is that the evidence was something that Tesla provided to the police. Whether or not it was tampered with is an open question though. Teslas are equipped with a gorzillion cameras, but also Tesla has access to deep fake technology. Tesla says that the guy manually deactivated autopilot then slammed the accelerator and drove right into a house. But he wasn’t intoxicated and it’s not clear why he would intentionally do such a thing. It wasn’t late enough that it was likely to he the guy falling asleep.

    Anyway, it would be very interesting if Tesla fabricated the driver turning off autopilot intentionally to save face/dodge consequences, but I don’t know how likely that would be.


  • OmnipotentEntity@beehaw.orgtoScience Memes@mander.xyzAha!
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    3 months ago

    If you floss regularly your gums won’t bleed, source: me. My gums never bleed at the dentist, but they used to when I sucked more at dental self-care.

    For the X-ray example, think about it this way: the doctor is like a bartender. One drink isn’t going to hurt you. The bartender can definitely serve you one drink. But if the bartender had to drink a part of a drink every time they served someone, that would become pretty dangerous for them indeed.











  • AI is something to be genuinely worried about. LLMs are a bubble, yes. They’re not great at what they’ve been shoehorned into, yes. They’re a disaster from a security standpoint because of this, yes.

    But LLMs are not the totality of deep learning or computer AI, and may not even be the future. We have our artificial inanity bots that do the spicy text auto complete right now, but that’s not going to be forever, no matter what Microsoft, Google, and NVidia want you to think for right now.

    Artificial intelligence is a problem that has a solution. I cannot tell you how long it will take, but I would be very surprised if I wasn’t personally around to see it, which means we need to begin preparing for it now. We need to build systems and structures now that don’t carry the inevitable logic that if the riff raff are unnecessary for those in power, then they should be kept docile, ignorant, powerless, and ignored at best, and purged at worst.




  • It turns out, that for the values we are talking about here, it actually more or less does! A lemon has a pH of around 2.5, while “Flow” has an advertised pH of 8.1. This means roughly that to neutralize 1L of this water you need approximately 0.4mL of lemon juice or about 8 drops/half a gram. It’s hard to tell how much a “spritz” is intended to be, but a single lemon contains about 60mL of juice, so this represents about 0.67% of the total juice inside.

    It’s a surprising consequence of using a logarithmic scale for pH.


  • I am a bit late to this party, but I thought I’d piggy back on your comment to halfway address it using math.

    We want to run data centers cool. This means keeping the center itself as close to 20°C as possible.

    If we lose our convection and conduction then our satellite can only radiate away heat. The formula governing a black body radiator is P = σAT^4. We will neglect radiation received, though this is not actually a negligible amount.

    If we set T = 20°C = 294K. Then we have the relationship of P/A = 423.6 W/m^2

    According to an article I found on the Register from this April:

    According to Google, the larger of the two offered pods will consume roughly 10 megawatts under full load.

    This would imply a surface area of at minimum 23600 m^2 or 5.8 acres of radiator.

    I don’t know how large, physically, such a pod would be. But looking at the satellite view of a google data center in Ohio that I could find, the total footprint area of one of the large building of their data centers is ballpark in that range. I don’t know how many “pods” that building contains.

    So it’s not completely outside of the realm of possibility. It’s probably something that can be engineered with some care, despite my earlier misgivings. But putting things in orbit is very expensive, and latency is also a big factor. I can’t think of any particular practical advantages to putting this stuff into orbit other than getting them out of the jurisdiction of governments. (Not counting the hype and stock song and dance from simply announcing you’re going to set a few billion dollars on fire to put AI into space.)