Re: More on levels of sequence organization
Posted by
Frank Wimberly-2 on
May 03, 2019; 1:36am
URL: http://friam.383.s1.nabble.com/More-on-levels-of-sequence-organization-tp7593148p7593201.html
I tried to copy this mail that had the file attached:
We used the Hearsay-II extensively as a model for how to do parallel, distributed applications in the Robotics Institute at Carnegie Mellon. It makes use of levels and communication among them, up, down and within a level. Applications included factory automation, job shop scheduling, and others. As a speech-understanding system it was replaced by Harpy which was faster.
Some will remember several other times that I have promoted this. I'm just trying to help.
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Frank Wimberly
Phone (505) 670-9918
About levels. I tried to post this but ran into the size problem.
We used the Hearsay-II extensively as a model for how to do parallel, distributed applications in the Robotics Institute at Carnegie Mellon. It makes use of levels and communication among them, up, down and within a level. Applications included factory automation, job shop scheduling, and others. As a speech-understanding system it was replaced by Harpy which was faster.
Some will remember several other times that I have promoted this. I'm just trying to help.
On the bounds of stupidity, there's at least a sucker born every minute, a large proportion of whom apparently benefit not at all from any kind of education.
A theoretical sequential machine, perhaps, that might melt a hole through the earth while simulating a cell.
The hierarchy in this case looks like linguistic compression to me, a way of summarizing results, the system is not depending on the levels of organization to work, we find levels convenient for explanations of how the system works.
-- rec --
Thanks VERY much for posting some digested material from the paper. What you say below seems to hearken back to what JonZ (or maybe JohnK?) said awhile back, ... paraphrasing: that he would be hard-pressed to find something that organisms can do that can't be duplicated by a sequential machine.
That type of statement and yours below do not *imply* that an effect was NOT generated by a (semi)hierarchical structure. It merely implies something like the parallelism theorem, that anything a (semi)hierarchial system can do, a "flat" one can do (though perhaps with extra space or time costs). Am I reading your statement right?
On 5/2/19 12:02 PM, Roger Critchlow wrote:
> But they don't actually extract the levels of organization from the model. They take the levels of organization as known facts and construct observations of the model that make predictions consistent with the levels. So if there are levels of organization as yet unidentified, they are at least as obscure in the model as they are in reality. And to claim that the levels of organization emerge from the model sort of ignores how much work went into constructing the observations.
>
> On the other hand, one might be surprised that all these levels are implicit in the amino acid sequences, but life knew that already, that's why it only remembers the sequences.
--
☣ uǝlƃ
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