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- Path: sparky!uunet!ogicse!flop.ENGR.ORST.EDU!rutgers!igor.rutgers.edu!planchet.rutgers.edu!nanotech
- From: keithl@klic.rain.com (Keith Lofstrom)
- Newsgroups: sci.nanotech
- Subject: Re: Surviving
- Message-ID: <Jan.25.17.07.03.1993.10196@planchet.rutgers.edu>
- Date: 25 Jan 93 22:07:03 GMT
- Article-I.D.: planchet.Jan.25.17.07.03.1993.10196
- Sender: nanotech@planchet.rutgers.edu
- Lines: 54
- Approved: nanotech@aramis.rutgers.edu
-
-
- In article <Jan.19.22.41.18.1993.23082@planchet.rutgers.edu> cuhes@csv.warwick.ac.uk (Malcolm McMahon) writes:
- >
- >I don't find the hot-house idea very credible. What conditions would
- >nano be likely to require? Not high tempartures and pressures,
- >certainly, in fact thermal motion is an important problem. More likely
- >vacuum and cold. Vacuum is easy enough to do at home. Let's look at
- >cold. Suppose, to take the extreme case you had nano that could only
- >operate continuously in surroundings at a few degrees absolute, liquid
- >helium temperatures. The operating temperature would have to be a good
- >deal higher (to create the thermal gradient and dissipate the heat). So
- >nano that would operate continously with liquid helium temperatures
- >would almost certainly operate briefly at liquid nitrogen temperatures
- >that are readily available.
-
- I think the "hot house" idea here means "special environment". Eric Drexler
- uses the analogy of a car - your average Chevy isn't going to head out into
- the woods and start foraging. Nor can any factory device you can point at.
- We made the transition from trained animals like horses - which can forage -
- to automobiles which cannot fend for themselves. If the infrastructure
- is there, an automobile is much more logistically manageable than a horse,
- even if the horse is more logistically complete.
-
- The same is true for virtually everything we design. Since we can
- separate reproduction and material processing from construction, we do.
- The result is more rubust and predictable systems.
-
- So what does this mean for a system of assemblers? Well, even if it is
- possible to build a complete and self contained machine, that would be
- a lot more difficult than building systems of heterogeneous machines,
- each specialized as to the function ( communication, fuel processing,
- manufacturing, defense ) it performs. At the macroscopic scale, you
- put up a machine that combines cad system, machine shop, and fighter
- bomber against my simple unifunction interceptor, and my simple machine
- will wipe out your complicated (and thus suboptimal) machine.
-
- Now the chances that one of these specialized machines will go rogue
- and prevail is about the same chance that one guy with a nuclear bomber
- could take over the world. It would take a large constellation of
- machines going rogue, and you can partition the systems so that this
- becomes logistically unfeasable. Any technological community, even
- a microscopic one, involves a vast wealth of design information that
- cannot be duplicated easily - simply witholding the information will
- slow down rogue system attempts to become self-sufficient and dangerous.
-
- Thus, a hothouse system can be formed that is dependent on external
- energy, materials, or information. If the system misbehaves it is
- simply deprived of necessary inputs until it succumbs.
-
- Keith
- --
- Keith Lofstrom keithl@klic.rain.com Voice (503)-520-1993
- KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon"
- Design Contracting in Bipolar and CMOS - Analog, Digital, and Power ICs
-