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WINGED WORDS, PHRASEOLOGICAL UNITS
Directory / Winged words, phraseological units / Stone guest

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

Winged words, phraseological units

Directory / Winged words, phraseological units

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stone guest

Pushkin A.S.
Pushkin A.S.

Phraseologism: Stone guest.

Meaning: About the one who came unexpectedly and led everyone into confusion (iron.).

Origin: From the drama "The Stone Guest" (1830) by A. S. Pushkin (1799-1837). At the end of this play, a stone statue of the Commander, Don Alvar de Solva, appears, killed by Don Juan (Don Juan), who seeks the love of the Commander's widow. The revived statue takes Don Juan with him to hell.

Random phraseology:

It's a son of a bitch, but it's our son of a bitch.

Meaning:

About condescension to a person with a dubious reputation - a countryman, a representative of his class, nationality, religion, etc.

Origin:

A review of the Nicaraguan dictator Anastasio Somoza (senior), who, as some American memoirists point out, belongs to the 32nd President of the United States (1933-1945) Franklin Delano Roosevelt (1882-1945).

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Each 3D printer is unique in its own way. 24.10.2018

As the experiments of researchers from the University of Buffalo have shown, the same objects made on different 3D printers can be quite distinguished from each other.

The authors of the work proceeded from the fact that each 3D printer, like the same typewriter, reproduces some of its characteristic prints over and over again. Therefore, you just need to understand what kind of prints they are, and learn how to "read" them. A series of identical objects were printed on different printers (14 in total), after which detailed images of each of them were obtained using a scanner. Upon closer examination, it turned out that each printed object had characteristic geometric parameters and texture features. By translating the obtained data into a numerical form, it was possible to calculate the degree of difference between one object and another.

It turned out that the mechanical features that affect the movement of the nozzle, the flow of material, etc. are all rather unique parameters for a particular 3D printer. Based on the totality of such characteristics, it is possible to compare the printed object with a specific apparatus with high accuracy. The researchers also tried to test what is called the strength of their method by testing ways in which you can erase individual fingerprints or try to pass off one device for another. It turned out that whether it is a change in the workplace and printing parameters, or a six-month break in the operation of the printer, or physical damage to printed objects - all this has little effect on the accuracy of identification.

3D printing, like many other things, can be used not only for good, but also for harm. Someone prints weapons, someone forges various parts or makes other bad things. Naturally, forensic scientists would like to have some methods to distinguish one printer from another by their products.

Of course, it is too early to say that all 3D printers sold will be listed in special file cabinets, as is done, for example, with rifled weapons. However, those who attempt to use 3D printing for criminal purposes should be aware that the results of their actions will not remain anonymous.

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