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BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
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Big encyclopedia. Questions for quiz and self-education. Interesting Facts

Directory / Big encyclopedia. Questions for quiz and self-education

The "Big Encyclopedia for Children and Adults" section contains fascinating articles that will broaden your horizons and reveal interesting facts. These informative articles will be an excellent source of information for quizzes, self-education and just curious reading. In our encyclopedia you will find many fascinating facts that will allow you to expand your knowledge and surprise your friends and family.

Simple answers to complex questions, 5500 articles.

 Random fun fact:

How did a Jewish girl manage to win the photo contest of Aryan children?

The competition for the best photo of an Aryan child, held in the Third Reich in 1935, was won by a six-month-old Hessie Taft. The organizers of the competition and Goebbels himself, who is credited with choosing the winner, did not suspect that the girl was Jewish. Her mother, Paulina Levenson, took Hessie to a photographer to take pictures for a family album, who, without the knowledge of her parents, sent a photo to the competition. The girl had to be hidden at home, and a few years later the family managed to leave Germany and eventually reach the United States.

Random interesting article of the Great Encyclopedia

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Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Created diffraction gratings for the world's most powerful laser 20.09.2022

Livermore National Laboratory researchers Lawrence (LLNL) and colleagues have designed and built new diffraction gratings for compressing high-energy laser pulses in the world's most powerful laser system. The new design will make it possible to transmit 10 PW of energy (1016 W) in one pulse. This is about ten times the total capacity of the US power grid, which is necessary for many areas of science.

Four HELD diffraction gratings (high energy low dispersion gratings) with dimensions of 85? 70 cm each will be installed in the ELI-Beamlines L4-ATON laser system in the Czech Republic. Such meter-sized HELD gratings could potentially contribute to the creation of future ultrafast laser systems with a power of 20 to 50 PW.

In a laser system, diffraction gratings are used to expand and then compress broadband laser pulses. The chirped pulse amplification (CPA) method was proposed in 1985 by physicists Gerard Albert Mourou and Donna Strickland, for which they received the Nobel Prize in Physics in 2018. Currently, the CPA method is the only one for obtaining a laser pulse of the petawatt level.

Thanks to the new diffraction gratings, the L4-ATON facility will be able to generate 1,5 kJ of energy in pulses with a duration of 150 fs (femtoseconds, 10-15 s), which will correspond to the transmission of an unprecedented power of 10 PW at a repetition rate of one pulse per minute. Achieving such energies will open the door to revolutionary research in areas such as plasma and high energy density physics, astrophysics, laser particle acceleration, advanced medical diagnostics, industrial processing technologies, and the detection of nuclear materials.

Compared to modern NIF ARC arrays, HELD arrays provide 3,4 times higher energy density. They are large enough, efficient and strong enough to withstand the high energy density of laser pulses. Stretching in time and spectral laser "shot" diffraction gratings reduce the energy load on the amplifying optical system, protecting it from damage. After amplification, the laser pulse is again compressed and thus reaches the highest energies without harm to the optical amplification channel.

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News feed of science and technology, new electronics

 

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