My general exam paper has been e-mailed to my committee, so, assuming I survive next Friday's oral exam, I will be officially ABD and have the right to a key to the math library.
Further investigation (http://en.wikipedia.org/wiki/Proximity_card) reveals that my card is probably nothing more than an integrated circuit that transmits a binary code to the receiver when an attached inductor-capacitor circuit is excited by an electromagnetic field from the receiver. Of course, any sufficiently advanced technology is indistinguishable from magic in the absence of Wikipedia.
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Date: 2007-04-15 09:40 pm (UTC)