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WINGED WORDS, PHRASEOLOGICAL UNITS
Directory / Winged words, phraseological units / About the dead - either good or nothing

Winged words, phraseological units. Meaning, history of origin, examples of use

Winged words, phraseological units

Directory / Winged words, phraseological units

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About the dead - either good or nothing

Jean-Leon Gerome, Diogenes
Jean-Leon Gerome, Diogenes

Phraseologism: About the dead - either good or nothing.

Meaning: It is better to remain silent about the deceased than to slander.

Origin: From Latin: "De mortuis aut bene, aut nihil" or "De mortuis nil nisi bene". The words of one of the great Greek "seven wise men" - Khilop (VI century BC), which were cited by the historian Diogenes Laertes (111 century) in his work "Life, Teaching and Opinions of Illustrious Philosophers".

Random phraseology:

Broken trough.

Meaning:

Loss of a brilliant position, broken hopes.

Origin:

From "The Tale of the Fisherman and the Fish" (1835) by A. S. Pushkin. The goldfish fulfilled all the whims of an envious, greedy old woman: she gave her a new trough to replace the broken one, then a new hut, turned the old woman first into a noblewoman, then into a queen, but when the old woman wanted to be the "mistress of the sea", the fish became angry: "The old man returned to old woman - // Look: again in front of him is a dugout, // His old woman is sitting on the threshold, // And in front of her is a broken trough.

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Random news from the Archive

Volitronics Success 13.04.2016

Physicists have learned how to generate and control electrons in the valleys of two-dimensional semiconductors.

In recent decades, researchers from different countries have been actively looking for a replacement for traditional electronics based on the use of an electron charge. They seek to reduce the power consumption and heat generation of electronic devices due to the flow of electric currents and increase their speed. The most well-known alternative direction is spintronics, which uses one more property of electrons - spin.

Much less known is another area of ​​research - volleytronics (valleytronics). It is based on the fact that some semiconductors have several minima of the allowed energy of conduction electrons (in the language of band theory - minima of the conduction band), which physicists call valleys. The English name valleytronics is formed similarly to spintronics from two words valley (valley) and electronics (electronics).

The presence of such valleys makes it possible to encode information by placing an electron in one of them. In combination with the spin, this allows you to significantly expand the possibilities of encoding information in devices. Separately, two spin values ​​or two valleys correspond to one bit of information - they can be compared with 0 and 1. But two valleys, in which the electron spins can take on different values, are a two-bit construction encoding already four values. And if you add a charge, then you can encode eight values. Like spintronics, volitronics promises faster response times, higher noise immunity, and lower power consumption. However, the creation of such devices in practice is hindered by the difficulty of managing electrons to place them in valleys and control them there.

Researchers in the United States and China reported that for the first time they were able to generate and control electrons in the valleys of a two-dimensional semiconductor, which is a layer of transition metal dichalcogenide (TMDC). To do this, they used the electrical transfer (injection) of his spin from an attached ferromagnetic semiconductor. Most importantly, they managed to place charge carriers in only one of the two valleys. Thanks to the phenomenon of electroluminescence, the valleys then emitted polarized light with different circular polarizations, observing which physicists were convinced of the success of the operation.

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