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APHORISMS OF FAMOUS PEOPLE
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Aphorisms of famous people. Chilon

Aphorisms of famous people

Free library / Aphorisms of famous people

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Chilon. The most famous aphorisms

  • Hurry to your friends more quickly in misfortune than in happiness.
  • Do not threaten: this is the woman's business.
  • Nothing beyond measure.
  • One should speak about the dead either well or nothing.
  • Know yourself.
  • It is difficult for the most intelligent philosopher to answer stupid questions.
  • Happy is the tyrant who dies a natural death at home!
  • Do not forestall thought with language.

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See also Sections Winged words, phraseological units и Proverbs and sayings of the peoples of the world.

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Random news from the Archive

The value of the Casimir torque is measured 07.01.2019

Researchers from the University of Maryland for the first time in the history of science managed to measure the value of the physical effect, the existence of which was predicted 40 years ago and which is called the Casimir torque. When two tiny particles, no larger than one micron in size, are placed very close to each other in a deep vacuum, they are attracted to each other, the effect of this attraction is known as the Casimir effect. The Casimir torque is related to this phenomenon and is caused by the same quantum electromagnetic effects. Under the influence of the Casimir torque, a tiny particle near the surface of a metallic material in a vacuum begins to rotate. But the force created by the Casimir torque is so small that until recently it was very difficult to measure its absolute value.

To carry out the measurements, scientists had to create a complex setup, the sensitive elements of which are liquid crystals, crystals similar to those used in liquid crystal displays. The liquid crystals were located only 10 nanometers away from the surface of a larger solid crystal. The liquid crystal motion recorder was a special polarizing microscope, which can be used to accurately measure the position of the optical axis of liquid crystals.

Liquid crystals are ideal sensors, as they are extremely sensitive to the effects of any external forces, and the fact that they polarize the light passing through them makes it possible to accurately determine their position at any time. A polarizing microscope sees each pixel of liquid crystals as a light or dark dot, depending on the position of the axis of the crystals themselves. And any change in this position leads to a change in the brightness of the pixel, which is instantly recorded by the microscope.

The scientists used several different types of particles and crystals to measure the precise forces generated by Casimir's torque. These forces have been found to be highly dependent on the kind of material the particles are made from, and each material has its own unique "signature" in terms of these forces.

Knowing the exact values ​​of the forces associated with the Casimir effect is important not only from a scientific point of view. The Casimir effect and torque forces can be used to power nano-sized parts and assemblies of tiny machines, which, in turn, can be assemblies of machines and mechanisms of a larger scale. "In traditional machines, torque is generated and transmitted using motors, crankshafts, cardan shafts, etc." - the researchers write, - "The Casimir torque can do all the same things at the nanoscale level."

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