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WINGED WORDS, PHRASEOLOGICAL UNITS
Directory / Winged words, phraseological units / lesser evil

Winged words, phraseologism. Meaning, history of origin, examples of use

Winged words, phraseological units

Directory / Winged words, phraseological units

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Lesser evil

Aristotle
Aristotle

Phraseologism: Lesser evil.

Meaning: The problem of choosing between two alternatives, neither of which seems attractive.

Origin: The principle "The lesser of two evils is always chosen" (lat. De duobus malis minus est semper eligendum) was formulated by Aristotle in his work "Nicomachean Ethics". Cicero, developing the idea of ​​Aristotle, in his essay "On Duties" said: "One should not only choose the least of the evils, but also extract from them what can be good in them"

Random phraseology:

How little has been lived, how much has been experienced!

Meaning:

About a short period of time during which a person happened to experience many different events.

Origin:

From the poem "The Veil Has Been Dropped" (1882), popular at the end of the 1862th century. Russian poet Semyon Yakovlevich Nadson (1887-XNUMX).

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Molecular memory works at room temperature 05.02.2013

Molecular memory stores data in individual molecules that sit between two ferromagnetic electrodes. This technology has great potential, since it allows you to store a huge amount of information on a tiny medium. Until now, however, molecular memory has been very difficult to manufacture and only works when cooled to near absolute zero.

A team of scientists from the Massachusetts Institute of Technology and the Indian Institute of Science and Education in Calcutta has succeeded in developing a new type of molecular memory that is not only easier to manufacture, but also works at the freezing temperature of water, which physicists think is room temperature. For example, for a powerful server station, you can create such a temperature using a refrigerator, which is much easier than "fencing" cryogenic cooling systems. In addition, the new circuit will require only one ferromagnetic electrode, which greatly simplifies production. The new memory consists of flat sheets of carbon atoms attached to zinc atoms. This structure can be manufactured with very high precision, which increases the reliability of the molecular memory.

Two ferromagnetic electrodes is a standard structure for magnetic memory, in which a sharp change in the orientation of the magnetic field of the electrodes causes a sharp jump in the device's conductivity. These two states of conduction are "1" and "0" of the memory. A new study, to the surprise of scientists, found not one, but two jumps in conductivity in this design.

This discovery makes it possible to produce molecular memory with a single electrode, which greatly simplifies the technology of molecular memory and increases its reliability. The fact is that in the presence of two electrodes, the molecules of the upper electrode begin to mix with the molecules that store information. In addition, until now, the problem of molecular memory has been the need for careful alignment of molecules to store information. Because of this, experiments were usually limited to working with 5-6 molecules, and there was no question of commercial production of a new type of memory.

The new molecular memory is made up of zinc atoms attached to flat sheets of carbon. These materials have the property of self-alignment, which means that it is easier to produce molecular memory with desired properties from them. So far, the conductivity of the new molecular memory has changed only by 20%, which is too small for a wide commercial application of the new technology. However, scientists believe that they will be able to find a suitable organic compound with a large fluctuation in conductivity.

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