• 0 Posts
  • 310 Comments
Joined 1 year ago
cake
Cake day: June 17th, 2023

help-circle



  • Just noticed a slight typo, fixed now. Also, at that point, most of the tests are useless and distinguishing the differences.

    It’s also quite weird. To me, it’s completely normal. It actually took significant mental training to match up with how others think. I knew I was quick, but not that quick.

    Unfortunately, it’s also a coping mechanism (adhd + autism + a few more quirks). My brain handles certain tasks abnormally. E.g. I can’t read emotions intuitively. I have to brute force it with general intelligence methods. I also have memory issues, again, compensated for with brute calculations.

    It’s a bit like being terrified of riding vehicles. You learn to cope. You then get slightly surprised when people complain how hard marathons are. You jog the 15 miles to work and back everyday! It’s not that hard. You develop the skills because you need them.

    Intelligence (particularly IQ) is also only a subset of being smart. I know people far smarter than me. Their IQ might not be at the same level, but they can leverage it massively more than I can. I’m a hot rod, amazing on a 1 mile track, crap on normal roads.


    1. Yes, I even have the paperwork to back that up. (99.7 percentile)

    2. No, I’m also a classic example of the difference between intelligent and smart. I’m a 1000hp engine in a reliant Robin van. Immense power, but limited in my ability to apply it to useful tasks.

    3. I’m the main character in my story. I know, logically, that I’m just another speck of humanity to others, but my ego can’t function in that state, so it doesn’t.

    Edit: apparent an extra 9 slipped in.



  • It was tried, quite extensively, early on in the reprap movement. No-one managed to get it working reliably. The issue is that the pellets don’t feed consistently enough. This means the flow is inconsistent. This massively messes with the quality of the print.

    There are theoretical ways to compensate. Unfortunately, most result in a huge jump in complexity and weight on the head. Neither is a good thing.

    Basically. The benefits aren’t generally with the costs, outside of a few, very niche areas. It’s also now easier to source filament most places, compared to pellets. So even that isn’t a game changer.






  • That wouldn’t work. You would need to change the orbital sizes, bonding forces (EM strong and weak, at least), and flow of time exactly in lockstep. Any deviation would show up in quantum mechanical experiments. None of these appear to have simple relationships to each other. It would be a huge new lump of physics to allow this to happen.

    The more likely explanation is that space has a very slight tendency to expand. It would need intergalactic (not just interstellar) distances to be detectable. We also know that (very strongly suspect) that space expanded rapidly in the very early universe. Space then collapsed into a cooler, more stable state. It was initially thought the expansion tapered off to zero, but it might be slightly positive still.




  • There’s a particular particle, the kaon, which can be created. This particle is highly unstable, and so, decays rapidly into other particles. Ever so often, it doesn’t decay down the normal route but instead decays into a pion. This is extremely rare (6 in a billion).

    In physics, we have what’s called the “standard model”. It’s our best guess as to how physics works at the fundamental level. It’s incomplete, however, with multiple slight variations. This decay pathway is interesting because it is quite sensitive to differences between these models. By measuring the energy and ratio of the resulting mess, we can disguard some variants of the model (their predicted energy is too high or too low).

    By using a large number of little measurements, like this, scientists can home in on the most accurate “standard model” variant. This, in turn, informs work on a deeper understanding of physics.

    Basically, a decade’s work to put a single new point onto a graph. A point that only theoretical physicists care about, and might, or might not be useful down the line. Welcome to modern physics.