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  2. Raycom Media - Wikipedia

    en.wikipedia.org/wiki/Raycom_Media

    Raycom Media. Raycom Media, Inc. was an American television broadcasting company based in Montgomery, Alabama. Raycom owned and/or provided services for 65 television stations and two radio stations across 44 markets in 20 states. Raycom, through its Community Newspaper Holdings subsidiary, also owned multiple newspapers in small and medium ...

  3. Enjoy 50% off a Sam's Club annual membership today - AOL

    www.aol.com/lifestyle/sams-club-membership-deal...

    Enjoy 50% off a Sam's Club annual membership today — just $25. ... It normally costs $50 per year to get access to all those savings, but if you sign up now, you'll be saving 50%. If you've been ...

  4. Pulse-width modulation - Wikipedia

    en.wikipedia.org/wiki/Pulse-width_modulation

    When a digital signal spends more time in the on state than the off state, it has a duty cycle of >50%. When a digital signal spends more time in the off state than the on state, it has a duty cycle of <50%. Here is a pictorial that illustrates these three scenarios: History. The Corliss steam engine was patented in 1849. It used pulse-width ...

  5. Pulse generator - Wikipedia

    en.wikipedia.org/wiki/Pulse_generator

    For example, the pulse repetition rate and duration may be digitally controlled but the pulse amplitude and rise and fall times may be determined by analog circuitry in the output stage of the pulse generator. With correct adjustment, pulse generators can also produce a 50% duty cycle square wave. Pulse generators are generally single-channel ...

  6. Submarine communications cable - Wikipedia

    en.wikipedia.org/wiki/Submarine_communications_cable

    A cross section of the shore-end of a modern submarine communications cable. 1 – Polyethylene. 2 – Mylar tape. 3 – Stranded steel wires. 4 – Aluminium water barrier. 5 – Polycarbonate. 6 – Copper or aluminium tube. 7 – Petroleum jelly. 8 – Optical fibers.

  7. Flywheel energy storage - Wikipedia

    en.wikipedia.org/wiki/Flywheel_energy_storage

    Flywheel energy storage systems using mechanical bearings can lose 20% to 50% of their energy in two hours. Much of the friction responsible for this energy loss results from the flywheel changing orientation due to the rotation of the earth (an effect similar to that shown by a Foucault pendulum ).

  8. 50 (number) - Wikipedia

    en.wikipedia.org/wiki/50_(number)

    In mathematics. 50 as the sum of two non-zero squares. Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 1 2 + 7 2 = 5 2 + 5 2 (see image). [1] It is also the sum of three squares, 50 = 3 2 + 4 2 + 5 2, and the sum of four squares, 50 = 6 2 + 3 2 + 2 2 + 1 2. It is a Harshad number.

  9. Arbitrary waveform generator - Wikipedia

    en.wikipedia.org/wiki/Arbitrary_waveform_generator

    An arbitrary waveform generator ( AWG) is a piece of electronic test equipment used to generate electrical waveforms. [1] [2] [3] These waveforms can be either repetitive or single-shot (once only) in which case some kind of triggering source is required (internal or external). The resulting waveforms can be injected into a device under test ...

  10. Function generator - Wikipedia

    en.wikipedia.org/wiki/Function_generator

    Frequency stability of 0.1 percent per hour for analog generators or 500 ppm for a digital generator. Maximum sinewave distortion of about 1% (accuracy of diode shaping network) for analog generators. Arbitrary waveform generators may have distortion less than -55 dB below 50 kHz and less than -40 dB above 50 kHz.

  11. Clock generator - Wikipedia

    en.wikipedia.org/wiki/Clock_generator

    A clock generator is an electronic oscillator that produces a clock signal for use in synchronizing a circuit's operation. The signal can range from a simple symmetrical square wave to more complex arrangements. The basic parts that all clock generators share are a resonant circuit and an amplifier. The resonant circuit is usually a quartz ...