• 5 Posts
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Joined 1 year ago
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Cake day: June 17th, 2023

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  • Various events around the universe occur on human timescales. If time stopped for use, we would effectively skip ahead on the view of them.

    I actually think we could reliably catch 1 second time stops. Scientists monitor various pulsars. They spin multiple times a second, throwing off radio wave pulses. If all of them suddenly went out of sync with our clocks, it would definitely be noticed. It might take several, however, to prove it wasn’t a weird hardware glitch.




  • I tend to prefer pass phrases, they are a lot easier to type and speak, if required. Mine regularly blow past 20 characters.

    As for salting, that only defends against rainbow table attacks. The salt needs to be stored along with the hash. That is find for most accounts, but once you’re in banking territory, that’s a bad bet.

    You also can’t assume you have no vulnerabilities. If someone gets your database, you can’t defend against brute force attacks.

    Lastly, if you are doing passwords properly, you shouldn’t care much about length. There are a few dos attacks to worry about, but a 512 char limit will stop those, and not limit any sane password.




  • Repeating plastics tends to damage them on a chemical level. The polymer chains break and shorten. This ends with the plastic being more brittle. Since 3d printed parts have already been remelted once, they have even more degradation than injection moulded parts.

    I believe the recommended amount of recycled plastic is around 30% for PLA. Any more and the parts lose significant strength.

    I personally would prefer us to accept that plastics aren’t really recyclable. It’s better to move towards renewable plastics like PLA, and treat the waste as biomass (either composted or burnt for energy.



  • It’s not too bad. Relativity says that no frame of reference is special.

    • On earth, a second looks like a second, but a second on the moon looks too quick.

    • On the moon, the second looks like a second, but a second on earth looks too slow.

    Both are actually correct. The simplest solution is to declare 1 to be the base reference. In this case, the earth second. Any lunar colonies will just have to accept that their second is slightly longer than they think it should be.

    If it helps, the difference is tiny. A second is 6.5x10^-10 seconds longer. This works out to 56 microseconds per 24 hours. It won’t affect much for a long time. About the only thing affected would be a lunar GPS.





  • One of the key thing that LLMs lack is a knowledge layer. In many ways, modern LLMs are hyper advanced predictive text. Don’t get me wrong, what they produce is awesome and can be extremely useful, but it’s still fundamentally limited.

    Ultimately, a useful AI will need some level of understanding. It will need to be able to switch between casual chatter, and information delivery. It will need to be able to crosscheck its own conclusions before delivering them. There are groups working on this, but they are quite a bit behind LLMs. When they catch up, and the 2 can be linked/combined then things will get VERY interesting!


  • It seems to allow it, in a sense. The errors are also left on the transmission end. By transmitting them normally, the 2 signals can be combined to recreate the data. Something is shared, at some point.

    It’s definitely a “we’re not sure what’s actually going on” type situation though. Either both ends are drawing on some (otherwise) hidden data layer, or FTL transmission is allowed, so long as no information flows (information as defined by quantum mechanics). It just turns out that weird entanglement based systems are the only ones (we’ve found so far) able to send infomationless transmissions.

    Both solutions would give deeper insights into reality, and its underpinnings. Unfortunately, we’ve not actually teased out which is happening.

    My gut feeling is that the speed of light is a side effect of a fixed/stable causality across all rest frames. Hidden information seems to be a lot more cumbersome.


  • The universe seems to be keyed to disallow time travel. The speed of light limit, in relativity, is sat exactly at the limit where time travel would become possible. Conversely, quantum mechanics does allow for FTP transmission. What it doesn’t allow is information to flow along those links. It’s hit with a 0.5 error rate, which completely blocks FTP communication.

    General relativity does allow for a few time travel options. However, these are sat well off in the sticks, where quantum relativity would dominate. Since we don’t have such a theory yet, our predictions are likely wrong. Even within these theories, a time machine would require a “closed timelike curve”. These can, in theory be made using several rapidly rotating black holes. Any ship traversing it, would never be able to leave before the time machine was built.

    Basically, time travel is almost certainly blocked by our laws of physics. Any loopholes would be limited to the lifetime of the “machine” and would require stellar level engineering for even a few seconds of travel.