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The best time for sound sleep

01.09.2016

Specialists from the University of Cambridge conducted a study involving more than 4 volunteers and found out that sleep on the night from Tuesday to Wednesday is the strongest, and the positive effect of such sleep on health is the most significant.

As part of the study, experts analyzed the subjects' heart rate indicators. Their optimal parameters fell precisely on the middle of the week, which scientists described as "the most suitable period for sleep."

Analysts noted that during this period of the week, people tend to consume the least alcohol and fatty foods, which can affect the quality of sleep.

Sleep is of great importance in human life, performing several important functions, such as: provides rest for the body, promotes the processing and storage of information, facilitates the consolidation of the studied material, restores immunity by activating T-lymphocytes that fight colds and viral diseases.

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Handheld x-ray scanners 17.01.2013

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Modern x-ray machines are too bulky and consume a lot of electricity. The new device is based on lithium niobate crystals, which have piezoelectric properties and act as voltage boosters. During the experiments, the new device was able to raise the voltage from 10 volts to 100 thousand volts. The lithium niobate crystal is an X-ray source: vibration energy is extracted in the form of a high-voltage electron beam, which is decelerated by a metal plate and produces X-rays.

The developers believe that in 3 years, based on the new technology, they will be able to create a compact X-ray machine, which is needed in many industries. A handheld X-ray scanner is useful for searching for defects in various designs, for examining luggage, on space technology, such as rovers. In medicine, portable x-ray machines are especially needed: imagine that dangerous radiation when taking a picture of a tooth will not be directed into the oral cavity, but vice versa - a “pill” emitter will be attached from the inside. It is possible that the power of the emitter can be increased hundreds of times, and then the military and special services will be interested in this invention, because the piezoelectric X-ray emitter will become a powerful secretive weapon that can kill a person.

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