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Fundamentals of Safe Life Activities (OBZhD)

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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

Metal bubbles for protective packaging 14.07.2013

Researchers at North Carolina State University have developed an unusual metallic bubble wrap that can be used as protective packaging for everything from food to cars and spacecraft.

The new material is similar to the familiar "anti-stress" polyethylene film with air bubbles that can be popped with your fingers. The only difference is that the new packaging material is made of metal, which makes it not only flexible, but also durable and heat resistant. The potential scope of the new material is very wide, for example, it can cover the wings of aircraft, sheathe body panels of cars, make suitcases, bags for computers, etc. Thus, it is possible that in the coming years we will see cars with a pimply body. We will not argue about the aesthetics of such a decision, but this will reduce the cost of a car, and besides, it will be more difficult to make a dent on such a body.

The new material performs the function of conventional sheet metal, but is lighter and more flexible. The price is also low, since the production of bubble metal requires only a few steps. First, a thin sheet of aluminum or any other metal is taken and rolled with a spiked roller. The result is a sheet with many hemispherical depressions into which a foaming composition, such as calcium carbonate or titanium hydrate, is placed. Then another sheet of metal is placed on top, and a heavy roller squeezes both sheets - combines them into one. The resulting flat sheet is placed in an oven, where heat initiates the foaming process: foam under pressure forms many bubbles on the surface of the metal sheet - the bubble sheet of metal is ready.

The researchers subjected the new film to various tests and compared it to conventional sheet metal. It turned out that bubble wrap weighs 20-30% less and has 30-50% more bending strength. At the same time, the tensile strength was similar to ordinary sheet metal.

The new metallic bubble wrap will primarily be used where strong insulation and protection are needed but space is limited - just a few millimeters thick. An example is the insulation of the engine compartment of a car, the thermal insulation of cryogenic tanks, the packaging of products, especially canned ones, etc. Compared to plastic, metal film is more environmentally friendly, heat resistant and easy to recycle.

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