Stop the pulse! Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Stop the pulse! Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Do you want to show the audience your extraordinary abilities? Ask one of the volunteers to find your pulse. Then, when he is convinced that there is a pulse, you, by concentrating, first slow down, and then completely stop it. The pulse will not be felt. Then make him beat again.

Focus secret:

Hide a tennis ball under your arm in advance. It is worth pressing it lightly, as the pulse at the wrist slows down, and then stops altogether. This is due to the fact that the artery is blocked by a ball under the arm. If you release the pressure, the pulse is restored.

Author: V.Postolaty

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Signal transmission through human tissue 13.04.2020

A team of developers from Finland has demonstrated the operation of a method of signal transmission to implants placed inside biological tissue that is safe for living organisms. The signal cannot be intercepted, blocked or changed from a long distance.

Professor Marcos Katz of the University of Oulu has led research for many years to find alternative ways to communicate. In 2017, together with colleagues, the scientist developed a hybrid communication channel that can smoothly switch between the transmission modes of radio waves and waves in visible light using VLC (Visible Light Communication) technology. The channel operation mode depended on its state and transmitted information.

When testing, the radiation wavelength was increased from a few millimeters to several centimeters and found a good connection even for deeply located implants. The external signal source was located at a distance of several meters from the "body".

The first results - 10 kilobits per second - did not please scientists too much. Then she increased the number of receivers / signal sources, conjured over modulation schemes and received a multiple increase in the transmission rate.

The technology of transmitting a signal using infrared radiation is useful not only in communication applications. The VLC can be used to control, for example, pacemakers and defibrillators. At the same time, radio interference or someone's malicious intent will not be able to cause the failure of this vital equipment.

It is with the use of technology in the medical field that the future research of the Finnish team is connected. The developers hope to contribute to the development of methods for diagnosing and treating diseases, as well as controlling devices implanted in the human body. It remains only to better understand the biological tissue as a conducting medium for infrared radiation.

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