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  1. Re:"half-lives measured in hours or days" on Radioactive Water Found In Two Reactor Buildings · · Score: 1

    It's also fairly unreactive and doesn't form any particularly soluble salts (as best as I can tell), so the exposure possibility is limited.

    The pertechnate anion is soluble and seems to be of some concern to those trying to permanently lock it away.

  2. Re:Pull A Jordan? Seriously? on George RR Martin Finishes A Dance With Dragons · · Score: 1

    I've liked Martin's SF short stories. Is this series worth the time investment?

    I liked his science fiction too, but I dropped this after the first volume. Too much death and maiming for my tastes.

  3. Re:Where we should have been years ago already on China Starts Molten Salt Nuclear Reactor Project · · Score: 4, Insightful

    The MSR reactors are neither liquid metal cooled nor water cooled. I don't see the relevance.

  4. Re:Slight exaggeration on China Starts Molten Salt Nuclear Reactor Project · · Score: 3, Informative

    clad failure

    There is no cladding on the fuel.

    we lack the capability to model fast reactors well.

    This is not a fast reactor. It is thermal.

    We don't have a lot of experience with molten salt reactors, which is a large part of what China is researching. Your criticism is at least premature.

  5. Re:Go China! on China Starts Molten Salt Nuclear Reactor Project · · Score: 1

    India is not working on molten salt reactors, as far as I know.

    Thorium will last as long as the Earth is habitable, as would Uranium in breeder reactors.

  6. Re:Who else hasn't read his copy of volume three? on Volume 4A of Knuth's TAOCP Finally In Print · · Score: 1

    The Art of Computer Programming, Volume 4A, The Combinatorial Algorithms, Part 1

    Sounds interesting, but I don't think I have time to read it now.

  7. Re:Riiight on Italian Scientists Demonstrate Cold Fusion? · · Score: 1

    Nickel-62 has the highest binding energy of any known isotope of any known element. You cannot extract any energy from any nuclear reaction involving that isotope, fission or fusion.

    A proton has the lowest binding energy, though. If you do the math you'll find that Ni+p weighs more than the resulting Cu, so you do get energy.

    Mind you, the whole thing is nonsense. There's no way they are getting Ni to fuse with a proton.

  8. Re:Merry Christmas on Record Set For World's Youngest Chess Champion · · Score: 1

    If you're referring to Kasparov vs Deep Blue, the software was only known to be tweaked between games. This has been considered fair. The computer did have some minor unfair advantages, though.

    Even if you feel Deep Blue cheated though, Kramnik, the world's champion, still lost to Fritz a few years ago. Fritz wasn't even the best program at the time, and the advantages were in Karmnik's favor, too. Nearly all GMs acknowledge that computers are stronger than them today.

  9. Re:Assange is the guest of honor on US To Host World Press Freedom Day · · Score: 1

    Statutory rape? It's often consensual.

  10. Re:This is only temporary on GM Loses Money On Every Volt Built · · Score: 1

    I can't figure out what government subsidies you are referring to. The obvious one is the $7,500 that goes with each car, but I can't believe you expect that to be repaid or something. The early development costs went away in the bankruptcy, so they don't exist as far as new GM is concerned. How the remaining development costs are allocated to each car is a matter for accountants, and can probably be adjusted to create either a profit or a loss for each car.

  11. Re:This is only temporary on GM Loses Money On Every Volt Built · · Score: 2

    All reports but this are saying that GM is breaking even on the Volt, which is pretty believable given its high price. Whether it's profitable or not probably depends on accounting rules. I expect they're really making a small marginal profit, but using Hollywood accounting to turn it into a loss.

  12. Re:Interesting if true on Stable Roentgenium Claimed Found In Gold · · Score: 4, Interesting

    Roentgenium is element #111, right below gold on the periodic table, and well within the zone of "highly unstable elements".

    Elements 110 through 114 have long been expected to be an island of stability. The problem is that we cannot stuff enough neutrons in, as Rg 281 still has too few. So far, the heaviest isotope created is also the most stable. The only problem is that the odd atomic number elements are expected to be less stable, so that 110, 112 or 114 would be more believable. I don't think it's really likely that he has found Rg, but it's not impossible.

    Rg, if it exists, would indeed be found as a trace element in Au.

  13. Other elements on Levitating Graphene Is Fastest-Spinning Object · · Score: 3, Interesting

    I wonder how fast you could spin a nitrogen molecule before it falls apart? It should be calculable. Would hydrogen go even faster?

  14. Re:This is why science rocks. on LHC Spies Hints of Infant Universe · · Score: 1

    I also believe the earth is however old carbon dating states it to be (though the technique isn't always reliable, I hear).

    Yeah, C-14 dating is only good back around 60,000 years. You need to use uranium or other long lived isotopes for the age of the earth.

  15. Re:I've always wondered on Aging Star System Leaves Strange Death Spiral · · Score: 2, Insightful

    The star with the spiral is behind a self produced dust cloud. It makes it look more dramatic.

  16. Re:Recycling? on Li-Ion Batteries Get Green Seal of Approval · · Score: 1

    Stable means that no decay rate can be measured, which mean more than about 10^20 years (probably vastly more).

  17. Re:Why mining? on The Best Near-Term Future of Space Exploration? · · Score: 1

    The Earth's crust is tectonically recycled every several hundred million years (any given chunk has been subducted and recycled several times, more or less; we estimated this my first year of grad school, but I forget the numbers exactly), so you could only rely on the metals delivered in the past few hundred million years.

    Just because the Earth's surface gets recycled every few hundred million years doesn't mean it all does. Diamond bearing kimberlite is usually over a billion years old, and much of the best iron ore is from when iron was precipitated from the ocean by the oxygenation of the atmosphere, two or three billion years ago.

  18. Giant letter? on EPA Proposes Grading System For Car Fuel Economy · · Score: 3, Insightful

    Just how stupid do you have to be to need a giant letter grade on a car? I hope that version doesn't fly.

  19. Re:A close call but we made it this time on Fire and Explosion At Hydrogen Station Near Rochester Airport · · Score: 1

    Gasoline requires about ten times as much energy to ignite as hydrogen.

    Could you explain why then gasoline has an auto-ignition temperature of 280 while hydrogen is at 500? See here.

  20. Re:Um... shouldn't traffic lights come first? on Building a Traffic Radar System To Catch Reckless Drivers? · · Score: 1

    But how does installing a traffic light generate money to put in more traffic lights?

  21. Re:Vi-sitter-i-ventrilo-dept on Valve Trademarks 'DOTA' · · Score: 1

    For those who don't know, the above post is referring to this.

  22. Re:Two spaces, bitches. on Sentence Spacing — 1 Space or 2? · · Score: 1

    But is there any practical difference? For instance, how many spaces are after this period. Did you guess 11?

  23. Re:Tesla on World's Fastest Hybrid OK'd For Production · · Score: 2, Informative

    The Spyder was $72.5k. But it won.

  24. Re:game changing, if true on Long In Development, Toshiba 'SCiB' Battery Debuts · · Score: 1

    A simple physical fact that batteries will never be able to overcome is that you don't have to carry your oxidant...

    A metal-air battery doesn't have to carry its oxidant. So far the number of charges they can take is inadequate, but people are still working on them.

  25. Re:Caution about ArXiv on The Possibility of Paradox-Free Time Travel · · Score: 1

    That is Grigori Perelman. There was no mention of him in the original link.