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Ubiquity symposium 'What is computation?'
Computation and Fundamental Physics

Ubiquity, Volume 2010 Issue December, December 2010 | BY Dave Bacon 

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In this seventh article in the ACM Ubiquity symposium, What is Computation?, Dave Bacon of University of Washington explains why he thinks discussing the question is as important as thinking about what it means to be self-aware. —Editor


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COMMENTS

Can't agree more with Tim's comment.

— Paul Luo, Tue, 11 Jun 2013 09:12:35 UTC

Article seems to be an elaboration on the limiting effects of entropy on the man made machinery and media of which man made computation is executed. The cycle of manifestation and deterioration of man perceived "information" in the physical world is not without its own transition or action constants. Disappointed the article did not address these non-manifesting, non-deteriorating action constants. For it is these action constants that also apply to abstraction physics. As an example of the pure abstract and its influence on the physical: The concept of the decimal zero represents nothing, a void, an absence of anything at all. Zero simply does not exist in physical reality, yet we make use of the abstract concept as a place holder for value. By using the non-physical concept of zero we are able to more easily do computations, than without it (i.e. calculating with roman numerals). How is it something that doesn't physically exist have such powerful value of physical influence in its concept use? The article does not express physical full scope relevance to computation. It only addresses the entropy effect on the physical matter/media used in computation. Nor does it address the manifestation effect, opposite entropy. I was hoping for a more complete article on fundamental physics as it applies to abstract computation, rather that just the limited media of our computations.

— Tim Rue, Fri, 31 Dec 2010 15:01:24 UTC

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