Computer Sciences

A very tiny alteration can help deepfakes escape detection

Last month, Sophie Wilmès, the prime minister of Belgium, appeared in an online video to tell her audience that the COVID-19 pandemic was linked to the "exploitation and destruction by humans of our natural environment." ...

Robotics

Locust swarm could improve collision avoidance

Plagues of locusts, containing millions of insects, fly across the sky to attack crops, but the individual insects do not collide with each other within these massive swarms. Now a team of engineers is creating a low-power ...

Computer Sciences

Tricking fake news detectors with malicious user comments

Fake news detectors, which have been deployed by social media platforms like Twitter and Facebook to add warnings to misleading posts, have traditionally flagged online articles as false based on the story's headline or content. ...

Consumer & Gadgets

Why do smoke alarms keep going off even when there's no smoke?

Editor's note: MVS Chandrashekhar is a professor of electrical engineering at the University of South Carolina. In this interview, he explains how smoke detectors work and why they sometimes sound an alarm for what seems ...

Consumer & Gadgets

A nanodrone able to detect toxic gases in emergencies

Detecting dangerous gases in collapsed buildings due earthquakes or explosions and locating victims in hard-to-access places are among use scenarios of the Smelling Nano Aerial Vehicle (SNAV), a nanodrone designed and created ...

Engineering

New standards developed to improve metal-detector testing

Metal detectors now appear routinely in the entrances of many schools, airports and even houses of worship. They serve as portals to correctional facilities, prisons and courthouses, and guards often wave the hand-held models ...

Sensor

A sensor (also called detector) is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument. For example, a mercury-in-glass thermometer converts the measured temperature into expansion and contraction of a liquid which can be read on a calibrated glass tube. A thermocouple converts temperature to an output voltage which can be read by a voltmeter. For accuracy, most sensors are calibrated against known standards.

This text uses material from Wikipedia, licensed under CC BY-SA