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WaveNET – the Floating, Flexible Wave Energy Generator

amorsen Niche energy (89 comments)

Median energy density in waves is too low in most places. You need way too large machines to extract useful amounts of power. The few times you get sufficiently powerful waves they tend to rip your equipment to bits.

Wave energy is one of those ideas which seem really obvious from a distance, so the fact that project after project fails does not seem to dissuade anyone. They were obviously just doing it wrong.

I really hope that I am wrong and this turns out to be a great success, but I am not holding my breath.

2 days ago
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Cops 101: NYC High School Teaches How To Behave During Stop-and-Frisk

amorsen Re:Education versus racism (474 comments)

Reid technique has ensured that less than 20% of people questioned get counsel. Generally people who are innocent will not ask for counsel; they just want to cooperate so the police can see that they are innocent, and asking for counsel is something they think only criminals do.

3 days ago
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What is your computer most often plugged into?

amorsen Re:UPS (233 comments)

So at full load on his system he almost gets to half rated load of the PSU and 85% efficiency. I.e. most of the time, at less than full load, the PSU will be below 85% efficiency.

3 days ago
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What Would Have Happened If Philae Were Nuclear Powered?

amorsen Re:Exploding Rockets vs. Nuclear Power (520 comments)

Ahh no it could have easily survive

You will need to back up that claim. The speeds involved are rather extreme.

RTGs have been used by other probes that used gravity earth boost...

Cassini had a fairly major public outcry against it, for just a single gravity boost, and that did not even fail.

3 days ago
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What Would Have Happened If Philae Were Nuclear Powered?

amorsen Re:Exploding Rockets vs. Nuclear Power (520 comments)

None of them have AFAIK disintegrated completely, like Rosetta/Philae would have done during a failed gravity boost. A crash during liftoff is not comparable to a high-speed impact.

3 days ago
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Book Review: Bulletproof SSL and TLS

amorsen Re:So is that a yes or a no? (90 comments)

There are no realistic alternatives. Opportunistic IPSEC never got started, and I am not aware of any other attempts which might actually work. You can replace the CA system with DNSSEC, but that does not solve the entire problem.

4 days ago
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Alva Noe: Don't Worry About the Singularity, We Can't Even Copy an Amoeba

amorsen Re:AI researcher here (447 comments)

As a logical positivist, I'm ready to reject all questions about consciousness, including claims that humans do or don't have it.

Are you ready to reject claims that you have consciousness?

4 days ago
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Study: Space Rock Impacts Not Random

amorsen Re:"Random" (78 comments)

You can trivially make large events depend on nuclear decay, thereby breaking macro world determinism.

4 days ago
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Cops 101: NYC High School Teaches How To Behave During Stop-and-Frisk

amorsen Re:Education versus racism (474 comments)

If you follow 1-3) with US police, they will use the Reid Technique to abuse your compliance and extract a false statement. Then you better have the resources of a (no-longer) well-off family and the help of the foreign office of a small nation in order to eventually get freed, like Malthe Thomsen. (I hate linking to the Daily Mail, but the case has not been well-covered internationally.)

The newspaper Politiken has in-depth coverage of the case in Danish.

4 days ago
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NASA Offering Contracts To Encourage Asteroid Mining

amorsen Re:A better idea (153 comments)

Yes, it is really strange that they do not do that. You have to wonder why they did not just do that with the Shuttle, just a parachute instead of those ceramic tiles. What could possibly be the problem with a parachute going MACH 20? Or more likely MACH 100+, in the case of an incoming asteroid?

4 days ago
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What is your computer most often plugged into?

amorsen Re:UPS (233 comments)

Power supplies are inefficient at low load. If you care about them kicking out heat, you should buy them as small as you can get away with.

about a week ago
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What Would Have Happened If Philae Were Nuclear Powered?

amorsen Re:Exploding Rockets vs. Nuclear Power (520 comments)

Rosetta/Philae returned to Earth three times for gravity boosts. Each time it was going at speeds which would guarantee its destruction if it hit the deeper parts of the atmosphere. Had this happened and Philae had carried an RTG, it would have been the end of ESA due to the public outcry, and NASA would likely be in public relations trouble too.

There are places for RTGs, but Rosetta was not it. Philae may have died prematurely, but ESA is alive to try again.

about a week ago
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Toyota Names Upcoming Hydrogen Fuel Cell Car

amorsen Re:Hydrogen is a nice alternative (194 comments)

Fuel cell basically is a sponge of certain minerals which chemically absorbs hydrogen so that it is not that volatile.

No. A fuel cell is a device which turns chemical energy into electrical energy without having to turn it into heat first.

about two weeks ago
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Military Laser/Radio Tech Proposed As Alternative To Laying Costly Fiber Cable

amorsen Re:Yes, it could be much cheaper (150 comments)

Still, when the NSA wanted access to Google's information, they went for tapping fiber optic cables instead of hitting them with National Security Letters.

The solution is encryption of course, but IPSEC is a royal pain and MACSEC is too limited.

about two weeks ago
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Military Laser/Radio Tech Proposed As Alternative To Laying Costly Fiber Cable

amorsen Re:Line of site (150 comments)

Line of sight. Sorry, it's a pet peeve.

about two weeks ago
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Military Laser/Radio Tech Proposed As Alternative To Laying Costly Fiber Cable

amorsen Re:Yes, it could be much cheaper (150 comments)

Fiber optic is trivial to tap. Almost as easy as analog phone lines.

about two weeks ago

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