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- From: szabo@techbook.com (Nick Szabo)
- Newsgroups: sci.nanotech
- Subject: Critique of Nanosystems
- Message-ID: <Dec.22.15.29.15.1992.18023@planchet.rutgers.edu>
- Date: 22 Dec 92 20:29:16 GMT
- Sender: nanotech@planchet.rutgers.edu
- Lines: 40
- Approved: nanotech@aramis.rutgers.edu
-
-
- Newsgroups: sci.nanotech
- Subject: Re: Some questions re "Nanosystems".
- References: <Dec.16.00.08.01.1992.4744@planchet.rutgers.edu>
-
-
- > What follows is a {somewhat edited] transcript of one of the
- >topics in the WELL conference on Nanosystems...
- >Topic 6: Nanosystems - New Drexler Book - Critique
- >By: Hudson Hayes Luce (hluce) on Sun, Nov 15, '92
-
- > For starters, let's look at p259, figs. 9.2a-e. Drexler terms these
- > structures "diamondoid"... [but 9.2c unstable at room temp]
-
- Looks like he was trying to find something with 3 bonds in
- cross-section for a data point, and that's the best he could
- come up with. Is the modulus from MM2/CSC approximation in
- figure 9.4 correct? Does Drexler use 9.2c as a part later on?
-
- > On p265 Drexler states "acquiring and processing molecules from solution.."
- > [but for part II high vacuum is assumed]
-
- This statement points to section 13.2, where Drexler talks about
- an "input port", which is presumably a sorting reservoir as
- shown in figure 13.1, or the staged reservoirs in figure 13.4.
- On pg. 375, "a modulated receptor system can easily pump against
- pressures of several gigapascal". Walls and seals are described
- in 11.4.2, pumps in 11.4.3.
-
- I am left breathless by how often Drexler blithely goes between
- solution and vacuum; for example where he asssumes vacuum while
- computing specificity in 13.2c (but says so explicitly).
-
- >"In mechanochemical systems, however,
- >potential energy released by a reaction can often be stored elsewhere"
- ^^^^^^
- > If this statement is true, perpetual motion is possible.
-
- Only if it reads as "all of the potential energy ... always", which
- it does not.
-