Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


OCCUPATIONAL SAFETY AND HEALTH
Free library / Occupational Safety and Health

electrical safety

Directory / Occupational Safety and Health / electrical safety

Occupational Safety and Health

 


 

All articles on labor protection. Occupational Safety and Health

Occupational Safety and Health

 


 

See also:

Basics of safe life

Fundamentals of First Aid

 


 

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

Diesel smoke harms the heart and blood vessels 05.02.2020

Dirty air is harmful to health - this is evidenced by medical statistics: those who breathe air with a large amount of industrial and automobile pollution are more likely to suffer from various diseases, including Alzheimer's disease.

Researchers from the National University of Kapodistrias of Athens equipped a special room in which it was possible to control the composition of the air, and filled it with air with combustion products of diesel fuel - in the amount that can be found in the center of a densely populated city (burned diesel accounts for about 50% of all pollution urban air). For comparison, the same room was filled with clean air. The participants in the experiment, forty people without any cardiovascular problems, were divided into two parts: one two hours they breathed smoky air, the other - clean air. A month later, both of them returned to the laboratory, but now they changed roles: those who used to breathe clean air now breathed diesel exhaust, and vice versa.

The state of the heart and blood vessels was assessed by a number of parameters: the activity of protein C was measured, which works as an anticoagulant in the blood, reducing the likelihood of blood clots; the activity of C-reactive protein, one of the main markers of inflammation, was measured; blood vessels were measured to what extent they can expand under the influence of increasing blood flow, how elastic or rigid their wall is, etc. It turned out that even two hours in a diesel atmosphere is enough for cardiovascular parameters to change, and not for the better side.

In those who breathed dirty air, the activity of the inflammatory protein increased (smoking participants in the experiment had more of it than non-smokers). The activity of the fibrinogen protein, which is necessary for blood clotting, also increased; at the same time, the activity of the anticoagulant protein decreased - from which we can conclude that the likelihood of blood clots increased in the vessels. Deviations in the heart rhythm appeared, and the walls of the vessels became less flexible - which, in turn, should affect the blood supply to the organs and the work of the heart. What is especially important, all these changes lasted for a day, although people breathed dirty air for only two hours. But many of us spend in the city center not two hours or three, but more.

Other interesting news:

▪ Obesity is contagious

▪ Write a letter on your knee

▪ Mining on the Moon

▪ Carbon nanotube heated vest

▪ 5TB external drives from LaCie

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Audio Art. Article selection

▪ article by Peter Kapitsa. Biography of a scientist

▪ article What astronomical discovery of the twentieth century was classified? Detailed answer

▪ Ivan-chai article. Legends, cultivation, methods of application

▪ article Connection of 2 computers on laser pointers. Encyclopedia of radio electronics and electrical engineering

▪ article The ball bursts when needed. Focus Secret


All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024