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  2. Wireless power transfer - Wikipedia

    en.wikipedia.org/wiki/Wireless_power_transfer

    In inductive coupling (electromagnetic induction [57] [77] or inductive power transfer, IPT), power is transferred between coils of wire by a magnetic field. [16] The transmitter and receiver coils together form a transformer. [16] [57] An alternating current (AC) through the transmitter coil (L1) creates an oscillating magnetic field (B) by ...

  3. Geographic information system - Wikipedia

    en.wikipedia.org/wiki/Geographic_Information_System

    Digital geologic mapping is the process by which geological features are observed, analyzed, and recorded in the field and displayed in real-time on a computer or personal digital assistant (PDA). The primary function of this emerging technology is to produce spatially referenced geologic maps that can be utilized and updated while conducting ...