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*Subject*: Re: starship-design: Massively Distributed Computing for SETI*From*: Ben Franchuk <bfranchuk@jetnet.ab.ca>*Date*: Sat, 17 Mar 2001 00:35:05 -0700*CC*: starship-design@lists.uoregon.edu*References*: <002001c0afd2$122dfa90$0100a8c0@broadsword>*Reply-To*: Ben Franchuk <bfranchuk@jetnet.ab.ca>*Sender*: owner-starship-design@lists.uoregon.edu

"L. Parker" wrote: > Zenon's best case was a 100 km antenna, which is probably the one we should > go with given the power densities we need. Since even relatively small > airborne phased array antennas of approximately one meter square contain > between 2000 and 3000 emitters, we can use the smaller number to estimate > the number of emitters and therefore the computing power necessary. First of with the power levels involved I don't expect to have a lot of very small emitters. Secondly since the array is so large, I expect the math can be simplified down, and since a block of emitters will have its own cpu for control a lot of calculations can be done locally. It may even be possible to have a incremental algorithm that updates partial factors with a recalculation every hour or so. Remember the scale -- HUGE distances to travel, thus a long time frame for travel. This is something that will take several generations to finish thus realistic goals must be set for each generation. I also expect that the fastest possible craft at this time (anti-matter drive) craft @ .4C for a one way trip would be .1C for a practical usable craft ie:Payload, and .05C for a beamed energy craft. -- "We do not inherit our time on this planet from our parents... We borrow it from our children." "Luna family of Octal Computers" http://www.jetnet.ab.ca/users/bfranchuk

**References**:**RE: starship-design: Massively Distributed Computing for SETI***From:*"L. Parker" <lparker@cacaphony.net>

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