Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library

Personal safety

Fundamentals of Safe Life Activities (OBZhD)

Fundamentals of safe life. Personal safety:

See other articles Section Basics of safe life:

See also section articles Fundamentals of First Aid:

<< Back

Latest news of science and technology, new electronics:

Blinking of the magician and his audience 19.05.2024

Magic and illusions have always captured the attention of the public, but what happens behind the scenes of the magician and in the brains of his audience? Scientists from the UK decided to solve this mystery by conducting a new study involving ten illusionists of varying experience. Illusionists, some of whom had been practicing magic for more than half a century, others for only six months, were invited to demonstrate the same trick - the popular coin trick. Recordings of their performances during training and on stage showed that each of them began to blink significantly more often at the moment of performing the trick. The study's findings indicate that magicians' blink rate may be related to unconscious aspects of their performance. At the same time, as scientists have found, spectators also begin to blink more often, following the movements of the illusionist. This observation supports the idea that magicians may be catalysts for blinking in audiences. Additional research has shown that magicians blink more often during ... >>

Ultrasonic coffee machine 19.05.2024

Iced coffee has become an integral part of coffee culture in recent years. Therefore, engineers from the University of New South Wales decided to improve its preparation. They have developed an ultrasonic coffee machine that reduces the cold brew time for ground coffee beans from 12-24 hours to significantly less time. Iced coffee, or "Cold brew", is popular due to its smoothness, low acidity and low bitterness. It is prepared by steeping ground coffee in cold water for a long time. Unlike traditional hot brewing, which often imparts bitterness to coffee, cold brewing extracts more delicate and complex flavors from the coffee beans. The innovative system, presented by a team of engineers, introduces ultrasonic technology into the coffee preparation process. The system uses ultrasonic waves to speed up the process of extracting oils, flavor and aroma from ground coffee. This allows you to significantly reduce the time ... >>

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 ... >>

Random news from the Archive

Liquid with piezoelectric effect 11.04.2023

American scientists have discovered a liquid that turns mechanical force into an electrical charge.

Michigan State University researchers have described the first known liquid to act as a piezoelectric material. It converts pressure into electricity and vice versa. It was believed that only rigid bodies possess such properties. The discovery may create a new direction in optics and hydraulics.

Physicists have found extraordinary characteristics by working with ionic liquids. These are salts that remain liquid at unusually low temperatures (the lower boiling point of water). Composed only of positively and negatively charged ions, the material is a viscous structure that resembles machine oil or maple syrup.

The study showed that when ionic liquids were placed in a cylinder and compressed by a piston, they generated electricity proportional to the applied force. Scientists also found the opposite effect: the optical properties of ionic liquids changed under the influence of an electric current. For example, when the researchers placed these liquids in a lens-shaped container, they found that an electrical charge could change the focal length.

Piezoelectricity has been known to scientists since the XNUMXth century, but all traditional research has studied only rigid bodies. They emit electricity under pressure, and under the influence of electricity they can change shape. Physicists do not yet understand how the piezoelectric effect occurs in ionic liquids. They will continue research to uncover the nature of this phenomenon.

Regardless of the result, the researchers believe that the new properties of ionic liquids can be used to create new applications: optical and hydraulic devices controlled by electricity. In addition, harmless liquids can replace toxic classical lead piezoelectrics.

Other interesting news:

▪ Single-chip system Ambarella S3L

▪ The ring monitors the pulse

▪ Qualcomm 8-core chip

▪ VIA Vpai 720 platform for the production of panoramic cameras

▪ MB86064 - 14-bit D/A Converter

News feed of science and technology, new electronics


Interesting materials of the Free Technical Library:

▪ site section Electrician's tool. Article selection

▪ article Irreplaceable we do not have. Popular expression

▪ article What is the main benefit of bees? Detailed answer

▪ article Examination of insured events in connection with an occupational disease

▪ article Zigzag antenna. Encyclopedia of radio electronics and electrical engineering

▪ article Direct Conversion Receiver. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:


Email (optional):

A comment:

All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews