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  2. Low-intensity pulsed ultrasound - Wikipedia

    en.wikipedia.org/.../Low-intensity_pulsed_ultrasound

    Low intensity pulsed ultrasound has been proposed as a therapy to support bone healing after fractures, [1] osteomies, or delayed healing. A 2017 review, however, found no trustworthy evidence for the use of low intensity pulsed ultrasound for bone healing, mostly based on the large pragmatic randomized controlled trial published in 2016.

  3. Pulse duration - Wikipedia

    en.wikipedia.org/wiki/Pulse_duration

    Pulse duration using 50% peak amplitude. DECT phone pulduration measurement (100 Hz / 10 mS) on channel 8. In signal processing and telecommunications, pulse duration is the interval between the time, during the first transition, that the amplitude of the pulse reaches a specified fraction (level) of its final amplitude, and the time the pulse amplitude drops, on the last transition, to the ...

  4. What You Need to Know About Phone Scams - AOL

    www.aol.com/know-phone-scams-180248742.html

    By educating yourself, taking steps to protect your information and using scam protection tools like T-Mobile’s Scam Shield, you can take the first step to reduce the possibility of being scammed.

  5. Ultrasonic testing - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_testing

    The diagnostic machine displays these results in the form of a signal with an amplitude representing the intensity of the reflection and the distance, representing the arrival time of the reflection. In attenuation (or through-transmission) mode, a transmitter sends ultrasound through one surface, and a separate receiver detects the amount that ...

  6. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

    www.aol.com/19-dangerous-scam-phone-numbers...

    Here are examples of three of the most common scams out there today and how to block these spam calls. 1. One-Ring Scams. Scammers use one-ring scams to get you, the victim, to call back. The ...

  7. Is Change Healthcare letter I received in the mail a scam ...

    www.aol.com/change-healthcare-letter-received...

    For premium support please call: 800-290-4726 more ways to reach us. ... Have you recently received a letter in the mail alerting you to a Change Healthcare data breach and are wonder if it's a ...

  8. Duty cycle - Wikipedia

    en.wikipedia.org/wiki/Duty_cycle

    For example, a signal (10101010) has 50% duty cycle, because the pulse remains high for 1/2 of the period or low for 1/2 of the period. Similarly, for pulse (10001000) the duty cycle will be 25% because the pulse remains high only for 1/4 of the period and remains low for 3/4 of the period. Electrical motors typically use less than a 100% duty ...

  9. Doppler ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Doppler_ultrasonography

    All modern ultrasound scanners use pulsed Doppler to measure velocity. Pulsed wave instruments transmit and receive series of pulses. The frequency shift of each pulse is ignored, however the relative phase changes of the pulses are used to obtain the frequency shift (since frequency is the rate of change of phase).