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  1. Re:I would have cheered on the tazing! on Students Put UCLA Taser Video On YouTube · · Score: 0

    Wow, you're a really big man for saying that. Clearly he was a pussy, confronting a bunch of police.

    Attention whoring? Probably, and that should get you kicked out of the library, and a date with a judge and a nice fat fine, but it should NOT get you repeatedly electrocuted. I don't know about tazers, but I have felt an electric fence that corralled a bull. It was hell on earth.

  2. Re:The Democrats Won on Hugh Thompson Answers Voting Machine Security Questions · · Score: 1, Informative

    The democrats aren't the ones receiving public endorsements (and major contributions) from the voting machine manufacturers. http://www.commondreams.org/headlines03/0828-08.ht m

  3. first! on Hugh Thompson Answers Voting Machine Security Questions · · Score: -1, Redundant

    got it!

  4. What they would they buy? It has been asked... on The Failure of the $100 Laptop? · · Score: 1

    From the NY times article "What the World Needs Now Is DDT" By TINA ROSENBERG Published: April 11, 2004 "People surveyed in rural Africa about what they would like to buy listed a bed net as only the sixth product on their wish list. The first three were a bicycle, a radio and, most heartbreakingly, a plastic bucket."

  5. Any nearby metal ruins the fun on Physicists Promise Wireless Power · · Score: 1

    You CAN build an antenna that couples very weakly to propagating (and thus energy removing) radio waves. Around such an antenna there will be a near-field electromagnetic wave (sometimes called an evanescent wave) that can couple into a resonant circuit. But: this near-field electromagnetic wave will also induce currents in any conductors (metal) lying around. The current heats the metal. It also causes the metal to act like an antenna of its own, most likely one that WILL couple to propagating waves. These two mechanisms will bleed off power. Furthermore, the intensity of the near-field wave will fall off very rapidly with distance from the transmitter, so even weak couplings to nearby metal objects will waste more power than will ever reach a well tuned but distant receiver. There will also be heating of dielectrics by the near-field wave, though this is not a very strong effect at only 6 MHz. This is very much like the inductive charging systems. They don't couple much to the propagating radio waves because they only use 60 Hz. The magnetic field they make is a dipole and falls off with the cube of the distance from the transmitter. So unless you put the receiving object right on top of them, they can't transmit much power. You could make a giant one, and move power around a room that way, but you would be living inside a transformer. Any metal in the room would get hot as hell. All of this should be obvious to an MIT professor. But it's good for a piece of hype.