Engineering

Bubble simulation: Model improves prediction of cavitation nuclei

Small gas bubbles that form and collapse in a liquid—a process known as cavitation—can cause big problems for equipment like ship propellers. Imploding bubbles create noise and vibration, interfering with acoustic sensors, ...

Computer Sciences

'Surfing attack' hacks Siri, Google with ultrasonic waves

Ultrasonic waves don't make a sound, but they can still activate Siri on your cellphone and have it make calls, take images or read the contents of a text to a stranger. All without the phone owner's knowledge.

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