Slashdot Mirror


User: Deadstick

Deadstick's activity in the archive.

Stories
0
Comments
2,517
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 2,517

  1. Re:Great for chainmaillers on A Cleaner, Cheaper Route to Titanium · · Score: 1

    You might be able to license that idea to Harry Turtledove for a novel...

    rj

  2. What's the point? on Wormbot Crawls Through Your Intestines · · Score: 1

    As TFA says, there are already "camera pills" you can swallow, but they don't gain you much. The drugs you get for a colonoscopy make it a non-event...the hard part is the 24 hours of purging that leads up to it, and you'll still have to do that with the camera pill. I expect the same would apply to the bot.

    Also, if the doctor finds a polyp with a colonoscope he can whack it out on the spot; if the pill/bot finds one, you may have to do the purge all over again.

    rj

  3. Re:Where are the bunkers to protect Citizens ? on Back to the Bunker · · Score: 4, Funny

    I'm gonna cover my roof with school desks. That's 5/8 inch particle board...nothing goes through that.

    rj

  4. Re:Doppler shift on JetBlue to Offer WiFi · · Score: 1

    See, this is why engineers get annoyed when computer engineers call themselves engineers...

    rj

  5. Re:Ten Worst of ALL TIME??? on Stupid Engineering Mistakes · · Score: 1
    Why just the Kursk? What about Scorpion and Thresher? And those only killed one crew each...the Hunley killed THREE.

    rj

  6. Re:Killed by molasses on Stupid Engineering Mistakes · · Score: 1

    When the foundation of your house starts to move, it's a little late to start running.

    rj

  7. Re:and right now .. live from Washington on WA Law: 5 Years in Prison for Gambling Online · · Score: 2, Funny
    You can day-trade yourself into the poorhouse on Schwab, but online poker is a felony?

    The gamblers known as businessmen view with austere disapproval the businessmen known as gamblers.

    --Ambrose Bierce

    rj

  8. Fun with lasers on Centrifuge May Be Superseded by Laser Enrichment · · Score: 4, Informative
    That trick of selective absorption of laser light has some pretty neat applications...you can actually cool a gas by shining a laser into it.

    If a photon of precisely the right frequency (and therefore energy) hits an atom, two things happen:

    (1) It gets absorbed, and transfers its momentum to the atom -- i.e., gives it a little push.

    (2) One electron in the atom absorbs the photon's energy, exciting it to a higher energy level.

    Then, after a random time interval, two more things happen:

    (3) The electron drops back down to its old energy level.

    (4) The atom emits a photon, carrying the energy given up by the electron, and the photon's momentum delivers another push to the atom.

    But while the first push was in the direction of the laser beam, the second one is in a random direction -- so the affected atoms, statistically speaking, wind up with a net gain of momentum in the direction of the laser beam.

    So far, the laser is basically just stirring the gas. Now you tune the frequency of the laser a little bit lower. The "average" atom sees the photons at the wrong frequency, and the photons just truck on by. But atoms that happen to be moving toward the laser see the photons Doppler-shifted up to just the right frequency and they receive a push away from it -- so their average speed is reduced. Ba-bing, ba-boom, the gas is colder.

    Laser cooling, along with a couple of other techniques, made it possible to get the super-low temperature needed to isolate the Bose-Einstein Condensate which got the 2001 Nobel.

    rj

  9. Not entirely new on Top 10 Strangest Gadgets of the Future · · Score: 4, Interesting

    I had some stock in a company called Chill Can Corp circa 1965. It had a patent on a self-cooling drink can looking much like the one in TFA...it went nowhere.

    A cardboard forerunner of the urinal game, called Whizzers, was marketed in the 70s.

    rj

  10. WinMe has a use... on The 25 Worst Tech Products of All Time · · Score: 1

    ...it lets you install XP on a new build from an Upgrade package.

    rj

  11. Re:You can't stop the paranoia. on US Releasing 9/11 Flight 77 Pentagon Crash Tape · · Score: 1
    True. Ground effect would be quite strong on that airplane, since it depends on the ratio of wingspan to altitude.

    rj

  12. Re:It certainly does tell something on US Releasing 9/11 Flight 77 Pentagon Crash Tape · · Score: 2, Informative

    Jet fuel is not more or less like kerosene. Jet fuel is kerosene.

    It has certain antifungal and other additives in small concentrations, and the solid crap has been filtered out of it, but other than that it's your grandfather's coal oil.

    rj

  13. Re:You can't stop the paranoia. on US Releasing 9/11 Flight 77 Pentagon Crash Tape · · Score: 1

    Yes on the ground effect, no on the Spruce Goose. Hughes didn't make any effort to climb out of ground effect because the airplane had stability and control problems and very likely would have crashed if he had.

    Designing an ultra-big airplane that will lift itself is no big deal: aerodynamic principles scale very well. The unknown area lay in the design of wood structures that big, and it turned out to be so floppy it was hard to control.

    The B-36 bomber flew at 410,000 pounds gross weight on six P&W R-4360 engines; the Goose weighed maybe 350,000 on its flight and had eight of the same engines and a longer wing.

    rj

  14. Re:Why Then Not Now? on Back to the Moon · · Score: 3, Informative

    It's called a corner reflector: three mirror surfaces mutually perpendicular. It has the interesting property that light striking it from any direction will wind up going back exactly the way it came -- after reflecting off one, two or three surfaces depending on where it hits first.

    Make it from sheet metal and it works for radio waves...hang one from the mast of your sailboat and vessels with radar will see you as easily as they can see the Love Boat.

    rj

  15. Could be the best thing ever... on London 2006, Meet London 1984 · · Score: 1

    ...for mimes.

    rj

  16. Re:Dr. Edward Morbius... on Favorite Film Scientists? · · Score: 1

    Yes, Morbius indeed. Not a one-dimensional wacko, but a respectable guy who went into his project with the best of motives only to have it blow up on him. Genuinely tragic figure.

    rj

  17. Re:I'm not sure it's that easy. on Gadgets for the Lazy · · Score: 1
  18. Holy Christamighty... on Computer Buying Experiences at B&M Stores · · Score: 1
    ...Someone spelled knowledgeable correctly in this thread!

    rj

  19. Re:Desperation on J.J. Abrams To Direct New 'Star Trek' Film · · Score: 1

    No...that comes when they film Star Trek: Gilligan's Planet.

    And all they wanted was a five-year mission.

    rj

  20. Re:Bust Buy creates business for others on Best Buy 'Geek Squad' Accused of Pirating Software · · Score: 2, Interesting
    If you look at it, in some situations, format and reload is generally QUICKER than spending hours on a problem.

    Oh, it's quicker all right...I had a situation where it was treated as mandatory.

    Seems the Ol' Lady bought a house brand machine from MicroCenter and let them talk her into an extended warranty (best of motives -- she didn't want to make me drive across town to play SA). So the machine quit reading its floppy drive, during the extension period, and she called the provider who was several states away. No problemo, he said, just get the CD out of the orange sleeve and put it in the drive...she realized just in time that he was talking her through a format/reinstall. No way, she says, the machine boots and runs fine, it's just a problem with the floppy drive and I'm not going to wipe the data.

    Sorry, he says, we warranty your computer, not your data, and we will not go further until you follow our instructions. When we're done, your computer will be as good as new. Of course, she gave him some instructions. I made a scene with the store management in front of customers and came away with some freebies, and the problem turned out to be a disk label that peeled off inside the drive.

    rj

  21. Better than barnacles? on The World's Strongest Glue · · Score: 1

    I've seen similar comments about the stuff that barnacles glue themselves to ship bottoms with...wonder how this compares?

    rj

  22. Re:Curious on Sun Research Yields Unexpected Results · · Score: 1
    astrological research

    Hmmm, let's see if I can guess your sign. Onager?

    rj

  23. Re:Where art thou, editors... on IBM Challenges Microsoft With an Ad Campaign · · Score: 1
    I know it's hard to moderate the thousands of user submitted articles we get here, but these are concepts taught in English classes at the elementary school level.

    In Deutschland sagt man "Konkurrenz."

    rj

  24. Re:How is Spyware Legal? on Claria Leaves Adware Business · · Score: 1
    Well, all the supermarkets in my area just hand you the card and a form. Doesn't matter if you send it in or not...the card still works. I've had cards from all the area markets for years, and they haven't the foggiest idea who I am.

    rj

  25. Re:How is Spyware Legal? on Claria Leaves Adware Business · · Score: 1

    One more. At least in my area, they hand you the card and say please fill out this form and send it in. You mean some people actually do that?

    rj