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The main sections of the Free Technical Library:

ENCYCLOPEDIA OF RADIO ELECTRONICS.
BEST ARTICLES FOR RADIO ELECTRONICS

Encyclopedia of radio electronics. The best articles for radio electronics

ENCYCLOPEDIA OF ELECTRICAL ENGINEERING.
BEST ARTICLES FOR ELECTRICIANS

Encyclopedia of electrical engineering. Best Articles for an Electrician

ARTICLES, REFERENCE MATERIALS

Articles, reference materials, encyclopedias

EFFECTIVE FOCUSES AND THEIR CLUES

Tricks and tricks with detailed explanation

ENTERTAINING EXPERIENCES AT HOME

Entertaining experiences at home

AT LEISURE

Effective means for relaxation and good mood

 


 

Latest news of science and technology, new electronics:

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Electron spin for quantum information transfer 18.05.2024

The transfer of quantum information remains one of the key tasks of modern science. Recent advances in the use of electron spin to expand the capabilities of information transfer in quantum systems have become very important. Researchers at Lawrence Berkeley National Laboratory are pushing the frontiers of quantum information science by experimenting with the possibilities of electron spin. Electron spin, a natural quantum bit, is a potentially powerful means for storing and transmitting information in quantum systems. Magnon wave packets, collective excitations of electron spin, have revealed their potential to transmit quantum information over significant distances. The work of Berkeley Lab researchers has revolutionized the way such excitations propagate in antiferromagnets, opening up new prospects for quantum technologies. Using pairs of laser pulses, scientists disrupted antiferromagnetic order in one place and simultaneously studied it in another, creating ... >>

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

Random news from the Archive

Methane beer festival 26.12.2019

The contributions of humanity to the formation of a warm blanket of our planet from greenhouse gases, although insignificant, are numerous. And methane, which, in terms of its harmfulness, that is, its heat-holding capacity, gives a twenty-fold head start to carbon dioxide, is one of the most important. This means that the fight against methane emissions is a serious task for climate advocates. And in order to fight seriously, you need to study the enemy well. It would seem that he noted for himself that cows give a hundred million tons of methane per year, became a vegetarian and calmed down in the hope that he had made a feasible contribution to the uncompromising struggle for the cold. But even in this case, you can’t relax, because the enemy has many faces and can lurk in an unexpected place.

Let's take folk festivals. It would seem, where is the emission of methane? But Chen Jia and Florian Dietrich from the Technical University of Munich, with the help of Dutch colleagues and smart devices, got close to the famous Munich beer festival - Oktoberfest. According to them, for 16 days on the central square of Munich, 2018 million people fell to the sources of the foamy drink in 6. They drank 8 million liters of beer, spent 100 million liters of water flushing sewage, 2,9 million kW of electricity and 201 liters of natural gas, of which 79% went to cooking and the rest to heating visitors and vendors.

Before the start of the holiday, methane emission was almost zero, and during the holiday it increased to 6,7 micrograms per second per square meter. Over the weekend, the issue rate doubled, as did the number of visitors. It would seem that this directly indicates that the source of methane is people who excrete it like ruminants. An no. Although methane can be seen in the exhalation of half the people, its amount is small: Oktoberfest attendees could breathe in only 0,13 micrograms of gas per second per square meter of area. The sewage system, although it took 100 million liters of water and 8 million liters of drunk beer, produced negligibly little methane during the holiday - the processing of waste by bacteria requires much more time than 16 days. There remains the spent natural gas, which, in terms of methane, amounted to 134 tons. To ensure the calculated emission, 16 tons had to fly into the atmosphere in 1,47 days, that is, 1,1% is a completely normal estimate for gas leaks.

The conclusion follows from this: it is not beer at the holiday that contributes to global warming, but gas. Abandoning it, say, switching to spirit lamps or gasoline stoves, will significantly improve the situation. True, there was a question for the authors of the work. Usually for portable burners, namely they are used in mobile pavilions, bottled gas is used. And this is not methane at all, but a mixture of propane and butane. If just such a gas was used at Oktoberfest, then the search for a source of festive methane will have to continue.

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News feed of science and technology, new electronics

 

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