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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    michael_nielsen‏ @michael_nielsen 11 Feb 2018
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    Massively multiplayer car racing is surprisingly beautiful. Connected to fluid physics, bird flocking, and population genetics: https://www.youtube.com/watch?v=bggwPKb_lFw … I can't shake the feeling that there is some rather deep idea here, but I don't know what.pic.twitter.com/jHt7vO0yDD

    3:12 PM - 11 Feb 2018
    • 24 Retweets
    • 88 Likes
    • John Prothero Oleksandr Prokopenko Jonathan Raiman Andrés Cuerv🎃 Michael Albergo Oren Shoham korede Igor Carron Nick Meharry
    10 replies 24 retweets 88 likes
      1. New conversation
      2. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        One thing it gets close to: the notion that there can be two completely different & correct explanations for the same phenomenon.

        3 replies 1 retweet 12 likes
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      3. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        E.g., if the atoms in my arm are moving, I can explain the trajectory in terms of intermolecular forces, etc. Or I can explain it in terms of a friend is messaging, I'm picking up my phone, etc.

        2 replies 1 retweet 8 likes
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      4. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        Both explanations are extremely useful and in some sense correct, while being very different types of explanation.

        2 replies 1 retweet 3 likes
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      5. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        What I like about the car simulations is that (a) I can see the low-level physics; and (b) I can almost-but-not-quite see some higher-level principles at work, too.

        1 reply 1 retweet 5 likes
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      6. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        I suspect it'd be possible to find a visualization that showed the two levels of abstraction simultaneously. The current graphic isn't it, but it seems tantalizingly close.

        3 replies 1 retweet 5 likes
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      7. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        One of my pet peeves about introductory physics is students are told "objects in motion continue in that state of motion [unless an external force, usually friction in intro accounts, is applied]."

        1 reply 1 retweet 5 likes
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      8. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        In fact, lots of objects - notably, human beings - don't behave that way, & it's very informative to figure out why. The puzzle is to figure out how higher-order theories (human intent) can appear to override lower-level ones (Newton's laws).

        4 replies 2 retweets 19 likes
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      9. End of conversation
      1. New conversation
      2. 𝔊𝔴𝔢𝔯𝔫‏ @gwern 11 Feb 2018
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        Replying to @michael_nielsen

        You forgot https://en.wikipedia.org/wiki/Particle_filter … , the isomorphism between Bayes theorem & fitness, raytracing, and variational interpretations of physics. :)

        4 replies 4 retweets 12 likes
      3. michael_nielsen‏ @michael_nielsen 11 Feb 2018
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        Replying to @gwern

        There's many examples of the phenomenon I'm talking about, though I don't think any of your examples fit the bill. (I'm not familiar with Thompson sampling, though.) I'm curious at being able to see the connection between different layers of abstraction, and how they resolve

        1 reply 0 retweets 1 like
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      1. Tristan Slominski‏ @tristanls 11 Feb 2018
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        Replying to @michael_nielsen @ktosopl

        why is this called "1K Project” and not "Monte Carlo Grand Prix”?!

        0 replies 0 retweets 8 likes
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