Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Since when have you been playing tennis? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article Comments on the article

Did you know?

Since when have you been playing tennis?

A sport similar to tennis was known in the 1873th century. in England (tennes, tenneys) and in France (jeu de paume, literally playing with the palm). In XNUMX, the English major W. Wingfield invented the so-called lawn tennis, that is, the game of tennis on a grassy lawn.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

How did Hephaestus take revenge on his mother, who threw him from Olympus immediately after birth?

In Greek mythology, Hephaestus is the god of fire and blacksmithing. Some consider Hephaestus the son of Zeus and Hera, while others argue that Hera gave birth to Hephaestus without the participation of Zeus - in retaliation for the birth of Athena from his own head.

One way or another, but Hephaestus was born so frail that Hera, in order not to be tormented by the miserable sight that her son was, decided to throw him off the top of Olympus. The fall ended quite well for Hephaestus: he fell into the sea, where Thetis and Eurynome immediately rushed to his aid. They settled him in a deep cave, where Hephaestus subsequently built his first forge. In gratitude for the kindness, he made a lot of jewelry and various useful things for his rescuers.

Hephaestus harbored anger at his mother for a long time and finally decided to take revenge on her. He forged a golden throne of extraordinary beauty and sent it to Hera. She was delighted with a gift worthy of the queen of gods and people. However, as soon as she sat on the throne, indestructible fetters wrapped around her. Hera was chained to the throne, and the rest of the gods could not help her.

Hephaestus was urgently brought to Olympus, but all the requests of the gods to him were in vain. And only when the cunning Dionysus gave Hephaestus a fair amount of fragrant wine, he, drunk, forgot the offense and freed his mother. After that, Hephaestus remained to live on Olympus.

According to another version, Hera noticed a brooch made by Hephaestus on Thetis' chest and asked where she got such a treasure. Seeing the confusion of Thetis, Hera insisted that she tell the whole truth - and at the same moment returned Hephaestus to Olympus.

One way or another, but Hera did her best to make amends with her son: she built a forge for him better than the previous one, where twenty horns did not fade for a moment, and even arranged his wedding with Aphrodite.

 Test your knowledge! Did you know...

▪ What is the most fertile mammal?

▪ What is the vault of heaven?

▪ How did a Hungarian chemist catch canteen workers reusing food leftovers?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

It will be impossible to control superintelligent AI 29.09.2022

The idea of ​​overthrowing humanity with artificial intelligence has been discussed for decades, and in 2021 scientists delivered their verdict on whether high-level computer superintelligence can be controlled.

The catch is that in order to control a superintelligence that is far beyond human understanding, it will be necessary to simulate this superintelligence, which can be analyzed and controlled. But if people are not able to understand this, then it is impossible to create such a simulation.

Rules like "don't hurt people" can't be set if people don't understand what scenarios AI has to offer. Once a computer system is running at a level beyond the capabilities of our programmers, then no more limits can be set.

The superintelligence presents a fundamentally different problem than those usually studied under the slogan of "robot ethics". This is due to the fact that the superintelligence is multifaceted and, therefore, potentially able to mobilize a variety of resources to achieve goals that are potentially incomprehensible to humans, not to mention so that they can be controlled.

Part of the team's reasoning came from the halting problem posed by Alan Turing in 1936. The problem is to know if the computer program will come up with an output and an answer (so it will stop) or just loop around trying to find it.

Scholars noted, as Turing proved with clever math, while we may know this for some specific programs, it is logically impossible to find a way that would allow us to know this for every potential program that could ever be written. This brings us back to AI, which, in a superintelligent state, could simultaneously hold in its memory all possible computer programs.

According to the scientists, any program written to prevent AI from harming humans and destroying the world, for example, can decide (and stop) whether or not it is mathematically impossible to be absolutely sure anyway, which means that its can't be contained. The scientists said the alternative to teaching the AI ​​some ethics and telling it not to destroy the world - something no algorithm can be absolutely sure of - is to limit the capabilities of the superintelligence.

“The study also rejected this idea, suggesting that it would limit the possibilities of AI. The argument is that if we are not going to use it to solve problems beyond human capabilities, then why create it at all? If we are going to move forward with AI "we may not even know when a superintelligence beyond our control will appear, such is its incomprehensibility. This means that we need to start asking serious questions about which direction we are moving in," the scientists noted.

Other interesting news:

▪ Nanobots to be launched into human veins

▪ Disposable video camera

▪ Family crossover Nissan Pathfinder

▪ giant crystals

▪ AVerTV Mobile 510 - Android TV tuner that works without internet

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Chargers, accumulators, batteries. Article selection

▪ article by Romain Rolland. Famous aphorisms

▪ article What award was awarded to Gagarin immediately after the first space flight? Detailed answer

▪ article Carrying out demonstration experiments in biology. Standard instruction on labor protection

▪ article Application of loop vibrators in trunk radio communication. Encyclopedia of radio electronics and electrical engineering

▪ article Frequency synthesizers TSA6060. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024