How the inventors of the mosquito deceived. Scheme, description

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How the inventors of the mosquito deceived. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Home, household, hobby

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The classic way to deal with flies is sticky tape. The inventors tried to fight in the same way with mosquitoes. A special composition of an odorous liquid was developed and applied to paper with an adhesive base. But the result was discouraging - the flies sat on the paper as if on honey, but the mosquitoes ... They preferred the inventors themselves. However, all this could have been foreseen. After all, mosquitoes are armed with a rather sensitive thermolocator, which allows them to easily distinguish animals and humans against the thermal background of other objects.

Then the inventors decided to go for a trick. We took a tape with double-sided metallization from a high-voltage paper capacitor. The ends of the tape that served as facings were closed together. It turned out two conductors connected in series, from which their ohmic resistance added up. Now the matter remained small - to connect a current source, for example, a battery or a 6-12 W power supply, through a small-sized wire resistance, with which you can adjust the current, and thereby heating the tape.

When the device was ready and the circuit was closed, the very first "bloodsuckers", being nearby, pecked at the bait. No matter how cunning the mosquito, but he managed to deceive.

How the inventors of the mosquito cheated

This wonderful device is easy to make yourself. How it works is clear from the figure. But this does not mean at all that it is necessary to adhere to just such a design. It can be anything - portable, stationary ... It is only important to choose the "favorite" temperature of mosquitoes through the resistance of the resistor and apply an adhesive mass such as "Mukholov" or "Muksid" to the tape. And in order not to accidentally stick yourself in the dark, you can equip the trap with a low-power red diode, a kind of beacon for midges.

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Physics and Linguistics 04.02.2012

Murray Gell-Mann, an American physicist and winner of the 1969 Nobel Prize in Physics, is known for his work in the field of elementary particles and for predicting the existence of quarks. Unexpectedly, he published an article on linguistics last fall, albeit in collaboration with a professional philologist.

They examined the typical word order in sentences in 2011 languages, including dead ones, and concluded that in short phrases of the first human language (judging by the data of archeology, genetics and linguistics, it arose about 50 years ago), the subject came first, then the object and at the end the predicate. For example: "The man killed the bear." In the future, there was an evolution: "A man killed a bear" and (in the most "advanced" languages) "A man killed a bear." However, this evolution applies only to languages with a fixed word order, such as English.

Curiously, Gell-Mann is not the first prominent physicist to become interested in linguistics. The English scientist Thomas Young (1773-1829), who proved the wave nature of light, contributed to the deciphering of Egyptian hieroglyphs.

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