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Plinz's profile
Joscha Bach
Joscha Bach
Joscha Bach
@Plinz

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Joscha Bach

@Plinz

FOLLOWS YOU. Artificial Intelligence, Cognitive Architectures, Computation. The goal is integrity, not conformity.

San Francisco, CA
bach.ai
Joined April 2009

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    1. Joscha Bach‏ @Plinz 26 Apr 2017
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      Nature is rarely about simple feedback loops. Control systems that control how other systems control systems are the rule, not the exception

      2 replies 0 retweets 8 likes
    2. onnlucky 🍀‏ @onnlucky 27 Apr 2017
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      Replying to @Plinz

      Really? Any examples besides nervous systems? I can see large feedback loops, with smaller loops inside, but that is not "control".

      1 reply 0 retweets 0 likes
    3. Rob MacLachlan‏ @robamacl 27 Apr 2017
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      Replying to @onnlucky @Plinz

      Look up "systems biology". It's a mess in that there cell. Many cyclic dependencies may not be important, but hard to know which ones.

      1 reply 0 retweets 0 likes
    4. onnlucky 🍀‏ @onnlucky 27 Apr 2017
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      Replying to @robamacl @Plinz

      Ok fair. Inside cooperating entities you expect a lot of control signals that create feedbacks, but not by "force". But in say ecosystems?

      1 reply 0 retweets 0 likes
    5. Rob MacLachlan‏ @robamacl 27 Apr 2017
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      Replying to @onnlucky @Plinz

      "Feedback regulation" a view of some types of dynamical systems. Usefulness of view depends on degree to which there is "design intent".

      1 reply 0 retweets 0 likes
    6. Rob MacLachlan‏ @robamacl 27 Apr 2017
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      Replying to @robamacl @onnlucky @Plinz

      Systems theory may explain ecosystem dynamics even if they are not "under control". But +, - feedback well defined even in absence of goal

      2 replies 0 retweets 0 likes
    7. Rob MacLachlan‏ @robamacl 27 Apr 2017
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      Replying to @robamacl @onnlucky @Plinz

      -fb stabilizing, +fb destabilizing. We tend to observe ecological negative feedbacks b/c systems don't stick around in unstable states.

      1 reply 0 retweets 0 likes
    8. Rob MacLachlan‏ @robamacl 27 Apr 2017
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      Replying to @robamacl @onnlucky @Plinz

      Ecosystems have had major irreversible changes in attractor basins over geologic time. Photosynthesis, multicellularity, etc.

      1 reply 0 retweets 0 likes
    9. Rob MacLachlan‏ @robamacl 27 Apr 2017
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      Replying to @robamacl @onnlucky @Plinz

      We also often err in thinking systems are in equilibrium when they aren't just because change is slow on a human scale. Balance of nature? 😝

      2 replies 0 retweets 0 likes
      Joscha Bach‏ @Plinz 27 Apr 2017
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      Replying to @robamacl @onnlucky

      Equilibrium, balance and change are simplifications that result from our (somewhat inevitable) conceptualization of systems as things.

      2:40 PM - 27 Apr 2017
      • 1 Like
      • Rob MacLachlan
      1 reply 0 retweets 1 like
        1. New conversation
        2. onnlucky 🍀‏ @onnlucky 28 Apr 2017
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          Replying to @Plinz @robamacl

          Like waves are simplifications from conceptualizing energy redistribution in liquid? Or because they are actually patterns and math applies?

          1 reply 0 retweets 1 like
        3. Joscha Bach‏ @Plinz 28 Apr 2017
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          Replying to @onnlucky @robamacl

          Waves are not really simplified, but the predictive patterns you must use in the absence of full sampling of the liquid's state vector.

          0 replies 0 retweets 1 like
        4. End of conversation

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