Thank you John for your update (FIS Digest 559, Issue 4) on the cost of computation. It's good to see experimental verification of Landauer's Principle. For those FISers interested in related topics on Landauer's Principle, you might also read:
1) Clark, K.B. (2010). Bose-Einstein condensates form in heuristics learned by ciliates deciding to signal 'social' commitments. BioSystems, 99(3), 167-178. http://www.ncbi.nlm.nih.gov/pubmed/19883726 2) Clark, K.B. (2010). Arrhenius-kinetics evidence for quantum tunneling in microbial "social" decision rates. Communicative & Integtrative Biology, 3(6), 540-544. http://www.landesbioscience.com/journals/cib/article/12842 Best regards, Kevin Clark
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