A sensor that monitors minor facial expressions. Free Technical Library News

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A sensor that tracks minor facial expressions

07.02.2023

Chinese scientists from Tsinghua University and Xi'an Polytechnic University have developed an ultra-thin, antimicrobial and breathable wearable sensor that can track human body movements and even subtle facial expressions.

The sensor is a three-layer nanogenerator, the structure of which is similar to a sandwich. The sensor can collect renewable and abundant mechanical energy with high efficiency.

The nanofiber of the middle layer serves to convert mechanical energy into electricity. It is coated on both sides with two nanofiber membranes, each of which is coated on one side with a 110 nanometer thick layer of silver that serves as an electrode layer.

The multilayer sensor is 91 micrometers thick.

The sensor has demonstrated an excellent level of sensitivity to human movements, which indicates great potential for applications in self-powered flexible electronic wearable devices and for monitoring the health of the human body.

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Random news from the Archive

The first wars in human history 04.01.2005

When did people start fighting among themselves? Archaeologists have studied the remains of ancient human settlements in the Oaxaca Valley (Mexico).

Approximately 3600 years ago, nomads began to establish permanent settlements here with adobe huts. In the largest of the villages, there were more than a hundred inhabitants. As shown by carbon isotope dating, 200-300 years after the founding of these settlements, they began to be surrounded by high wooden fences. And two thousand years ago, many men who lived here began to wear metal helmets. Apparently, somewhere in this period, wars between people began.

The Mexican finds support the theory of the American anthropologist Raymond Kelly, according to which nomadic hunter-gatherer societies had murders but no fights between large groups of people.

When permanent settlements arose, relations between people changed, and the essence of conflicts also changed. The killing of one villager came to be seen as an attack on the entire village, for which the enemies should be avenged. Entire armed crowds began to gather on a campaign against a neighboring settlement. The militancy of the ancients intensified when the prosperity of the villages increased: for the sake of rich booty, it was worth going on a campaign.

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