--- Log opened Sat Dec 09 00:00:53 2023
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06:03 < kanzure> anonymous genome sequencing https://nebula.org/anonymous-seq/ https://news.ycombinator.com/item?id=38578951
06:05 < kanzure> "Even in the US, California requires 23andme to "bank" the DNA and store it for 10 years along with the name and PII. This is available to authorities. You cannot request for this to be deleted or destroyed by law."
06:08 < kanzure> weird that nebula is not even making a very visible commitment to deleting your data. bizarre.
06:17 < L29Ah> gotta tell fake credentials during order
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13:35 < Ashstar> there are reasons why law enforcement would wish to have access to DNA for years
13:35 < Ashstar> info
13:36 < Ashstar> people have been exonorated after decades sitting in prison
13:36 < Ashstar> national security reasons, too
14:18 < muurkha> Ashstar: obviously there are, and they're not to exonerate people who are sitting in prison.  those reasons are what we're objecting to
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16:23 < docl> .wik Calutron
16:23 < EmmyNoether> "A calutron is a mass spectrometer originally designed and used for separating the isotopes of uranium. It was developed by Ernest Lawrence during the Manhattan Project and was based on his earlier invention, the cyclotron." - https://en.wikipedia.org/wiki/Calutron
16:25 < fenn> .t https://twitter.com/ylecun/status/1733481002234679685
16:25 < fenn> .m
16:25  * fenn sighs
16:25 < fenn> .m https://twitter.com/ylecun/status/1733481002234679685
16:25 < AugustaAva> ​twitter: <ylecun> The EU AI Act negotiations ended. ␤ One contentious issue was the regulation of foundation models, particularly open source ones. ␤  ␤ Kudos to the French, German, and Italian governments for not giving up on open source models. ␤  ␤ Juicy part:  ␤ "The legislation ultimately included…
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16:59 < docl> has anyone suggested merging an ion propulsion system (using asteroid mass e.g.) with an ion refining system? both systems involve accelerating ions. maybe you could have an asteroid mining bot that collects a big chunk of metallic asteroid and returns with a much smaller chunk of PGMs and REEs
17:01 < muurkha> interesting idea
17:01 < muurkha> I don't know why you'd bother with rare earth elements though
17:01 < muurkha> maybe you're under the misconception that they're rare
17:02 < muurkha> if you have an unlimited supply of energy, you can also convert iron into gold and platinum and whatnot
17:02 < docl> nah just potentially marketable or useful enough since they aren't enriched ores here on earth
17:02 < muurkha> they're pretty cheap here on earth
17:04 < muurkha> I mean https://en.institut-seltene-erden.de/aktuelle-preise-von-seltenen-erden/ has prices like $1481-$1553 for cerium carbonate
17:05 < muurkha> which sounds kind of expensive until you realize that that's the price per tonne
17:05 < docl> ahh
17:06 < muurkha> terbium and praseodymium are higher but we're still talking about things that are priced by the kilogram, not by the troy ounc
17:06 < muurkha> e
17:07 < docl> didn't actually look up the cost. yeah that's too cheap to be worth asteroid mining without a pretty strong feedback loop system in place. you could just flush everything that isn't > $10k/kg. platinum is about $30k/kg
17:21 < docl> that said, the amount of nickel and iron means you have a lot of propellant to use. even if you stick with lowish exhaust velocities comparable to chemical engines. so it's a potential value-add to keep some of the $500/kg stuff if you can deliver to Earth from orbit without too much extra cost (or use in cislunar factories). the PGMs are only present at 10-100 ppm quantities, and e.g. expelling 1000x 
17:21 < docl> the final mass of the rocket at 4km/s gives 27.6 km/s worth of delta-v
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--- Log closed Sun Dec 10 00:00:54 2023