🚀 go-pugleaf

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.