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Electronic bra monitors the figure

13.12.2013

American researchers built devices into the bra that can take an ECG and measure the electrical conductivity of the skin, which changes with sweat (which can indicate excitement), as well as an accelerometer and a gyroscope. The development allows you to track the mood of a woman using sensors built into the bra, and sends a notification to a smartphone if a woman is diagnosed with stress and there is a danger of overeating.

Erin Carroll of the University of Rochester, as well as her colleagues from the University of Southampton and Microsoft, initially conducted a study in which they monitored the nutrition and mood of 12 people (10 women and 2 men) using a mobile application. It was found that half of the subjects were prone to overeating when stressed, but timely reminders of stress-reducing techniques (such as breathing exercises) helped them to control themselves.

After that, it was proposed to integrate devices for measuring the electrical conductivity of the skin and electrocardiography into the bra. As you know, the electrical conductivity of the skin changes when a person sweats, and this may indicate excitement. An accelerometer and a gyroscope were also built into the bra. By monitoring a woman's mood, the 'smart' bra sends notifications to her smartphone about the dangers of overeating.

The development was tested by 4 women. During the experiment, they had to report data on their emotions to scientists for 4-6 hours a day for 4 days. The researchers compared these data with instrument readings, after which they created an algorithm that recognizes the excitement of a woman with an accuracy of 75%.

The use of a bra during the experiment was due to the fact that it is possible to install a device for recording an ECG near the heart. As for attempts to create similar clothes for men, they turned out to be associated with certain difficulties.

Original health monitoring devices that can be worn on the body have recently become increasingly popular. For example, in October, a bra appeared that sends a message to Twitter every time it is unbuttoned. The developers believe that this should encourage women to get tested more often for breast cancer.

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Technology for printing XNUMXD objects from liquid 07.04.2018

Scientists at the Lawrence Berkeley National Laboratory have developed a way to print three-dimensional objects and structures made entirely of liquid materials. Using an upgraded XNUMXD printer, they created networks of water "tubes" in silicone oil. This technology can be used to create liquid electronics that power flexible and elastic devices. In addition, this method will allow the separation and study of individual molecules, the delivery of "building blocks" for the manufacture of nanoscale mechanisms and microelectromechanical systems.

The printed water filaments had a thickness of 10 microns to 1 millimeter with a filament length of several meters. To implement this technology, scientists had to develop a method that does not allow water to break into separate drops during printing. The solution to this problem was a special surfactant material that binds and holds water.

This material was obtained by filling water with gold nanoparticles and special polymeric oil molecules, into which water was squeezed out. The gold nanoparticles and polymer molecules are attracted to and adhere to each other, creating a clear boundary between water and oil. At the same time, the boundary created by nanoparticles and polymer molecules resembles glass in its structure, but this material can be stretched or deformed without losing its "separating" function.

"Boundary stability means that we can extrude water into a tube and it will remain a tube. We can shape water into an ellipsoid and it will retain its shape," the researchers write. for several months."

After that, the researchers took a standard XNUMXD printer and removed all the components associated with extruding plastic, replacing it with a syringe with a thin needle through which water filled with nanoparticles is extruded. And after that, the printer, running standard software, was able to create any form of water tubes in a container filled with silicone oil.

“Now we are able to “conduct” water threads anywhere in three dimensions,” the researchers write, “However, after that we can exert a certain effect on the material, which will violate the stability of the boundary layer and force the water threads to change their shape. This gives us the opportunity endless reconfiguration of printed liquid structures that have a chance in the future to become the basis of reconfigurable liquid electronics."

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