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OCCUPATIONAL SAFETY AND HEALTH
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Labor protection of certain categories of workers

Directory / Occupational Safety and Health / Labor protection of certain categories of workers

Occupational Safety and Health

 


 

All articles on labor protection. Occupational Safety and Health

Occupational Safety and Health

 


 

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Fundamentals of First Aid

 


 

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

Purifying water with eggs 28.11.2022

Found an unusual way to purify water from microplastics. This will help to get rid of the main environmental problem - the lack of drinking water.

You can purify water at home. If suddenly it was not in the tap, and you got it somewhere on the street. Probably, the problem of acute shortage of drinking water on a planetary scale will soon be solved. And chicken eggs will help in this.

The idea arose by chance. American chemist Craig Arnold was sitting at a dinner meeting of colleagues at Princeton University and began to examine the bread in his sandwich.

Then he thought that the structure of this bread could be used in an airgel to filter water. Arnold and his assistants then began experimenting with bread recipes with extra carbon.

The first samples of airgels did not have the necessary durability. Then the experiments continued with individual ingredients. And finally, there was an unexpected discovery: egg white with a little added carbon showed the necessary results.

The test has not yet been completed, but it is already clear that the egg white airgel filters out salt and microplastics from sea water with an efficiency of 98% and 99%, respectively.

How is this airgel created? A mixture of egg white and carbon is frozen, then heated to 900 degrees in an oxygen-free environment. In structure, it resembles the same bread that gave Arnold the idea.

A new airgel made up of carbon filaments and graphene sheets has proven to be more efficient than activated carbon filters. The main thing is that it does not require electricity. Water passes through the filter with the help of gravity.

In the near future, airgel based on egg whites will be produced on an industrial scale.

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