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Article #4744Re: Can Information Have Physical Units?
From: Erkan Tekman
Date: Tue, 06 Oct 1992 04:25
Date: Tue, 06 Oct 1992 04:25
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1470 bytes
In article <12950089@hpspdla.spd.HP.COM> ric@hpspdla.spd.HP.COM (Ric
Peregrino) writes:
>Shooting from the hip I'd say information has the same units as entropy,
>which I thought was unitless. But what about Gibbs free energy:
>
>dG = dH + TdS
>
>S then has units of energy/temperture? Maybe I'm just being dense?
information is indeed unitless, one has for the hamiltonian
H = H_o + h I
including the effects of change in information I, with h being variation of
energy w.r.t. information, that is has unit of energy. for the energy, on
the other hand
E = E_o + h/(k ln 2) S
with S being entropy (energy/temp.), and k ln 2 is the elementary entropy
change per bit. so
S = k ln 2 I
everything fits together...
i just copied these from J. D. Brasher, Int. J. Theor. Phys. vol 30, 979
(1991), by the way ;-)
erkan
tekman@ecn.purdue.edu
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Path: arc1-ca.pugleaf.net!sparky!uunet!europa.asd.contel.com!darwin.sura.net!spool.mu.edu!agate!ames!purdue!mentor.cc.purdue.edu!noose.ecn.purdue.edu!dynamo.ecn.purdue.edu!tekman From: tekman@dynamo.ecn.purdue.edu (Erkan Tekman) Newsgroups: sci.physics Subject: Re: Can Information Have Physical Units? Message-ID: <1992Oct6.042539.9893@noose.ecn.purdue.edu> Date: 6 Oct 92 04:25:39 GMT References: <1992Oct5.153852.12046@asl.dl.nec.com> <12950089@hpspdla.spd.HP.COM> Sender: news@noose.ecn.purdue.edu (USENET news) Organization: Purdue University Engineering Computer Network Lines: 32