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Recent content by Joe Gwinn

  1. J

    New type of battery

    On page B1 of the 2 November 2005 issue of The Wall Street Journal appeared "New Type of Battery Offers Voltage Aplenty -- at a Premium" by Wm Bulkeley. A startup called A123 Systems in Waltham, MA, is offering a lithium-ion battery with twice the energy density of the NiMH batteries currently...
  2. J

    Microwave Pulse Induction Metal Detector

    I just read an interesting article on page 54 of the 24 October 2005 issue of Aviation Week, "Through the Walls: High-power microwave devices examined to play roles of sensors as well as weapons", David A. Fulghum. The title pretty well tells the story. Near the end of the article, they talk...
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