Electricity is chaotic, and we normally need to constrain it to wires and circuits to make use of it. Scientists in Europe and Canada have now managed to guide sparks through thin air and even around ...

It usually takes under a minute for an ultrasonography tool to assess whether a critically injured patient has time for a CT scan or needs ... learn the basics of ultrasound technology and technique ...

Ultrasound close ultrasoundSound with a frequency greater than 20,000 Hz (20 kHz). waves have a frequency higher than the upper limit for human hearing – above 20,000 Hertz (Hz). Different ...

including scans from COVID-19 patients. Then, it accurately detects abnormalities indicative of the virus. “We had to model the physics of ultrasound and acoustic wave propagation well enough in ...

Ultrasound close ultrasoundSound with a frequency greater than 20,000 Hz (20 kHz). is sound with a frequency greater than 20,000 Hz. Humans cannot hear ultrasound but many other animals can, such ...