Periander. The most famous aphorisms

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APHORISMS OF FAMOUS PEOPLE
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Aphorisms of famous people. Periander

Aphorisms of famous people

Free library / Aphorisms of famous people

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Periander. The most famous aphorisms

In happiness be moderate, in misfortune be reasonable.
In diligence - everything.
To friends and in misfortune, be unchanged.
Whoever wants to rule in peace, let him guard himself not with spears, but with common love.
Peace is beautiful, recklessness is dangerous, greed is vile.
What is the reason for everything? - Time.

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Random news from the Archive

The world's first mine hydroelectric power station was launched 25.07.2020

A new type of hydroelectric power plant, developed at the Technical University of Munich, provides electricity to about 800 houses and does little harm to nature.

Although hydroelectric power stations are considered to be quite an environmentally friendly source of energy, they still cause damage to nature. In addition to changing the river landscape, such power plants are also deadly for fish that enter the turbines along with the flow, and in addition, they change the habitual migration routes and habitats of river fauna.

German scientists claim that the mine hydroelectric power station developed by them is devoid of these shortcomings. As the name implies, the turbine and generator of such a station are located in a shaft in front of the dam below the level of the bottom of the river channel. The water flows through the shaft, turns the turbine and flows out from below under the dam. A small part of the water passes from above - above the mine and the dam.

The mechanism of the station is designed in such a way that despite the high efficiency, the water flow in the mine is rather weak, and as studies on various prototypes have shown, most fish are able to swim through it without any damage. They can also go downstream through two special openings in the dam, and climb back - along the ladder fish passage.

In addition, the mine hydroelectric power station does not retain boulders and wood that move with the flow and are important, in particular, for spawning. They remain on the grate that closes the mine, and then they are simply thrown down from the dam by a special mechanism.

Shaft HPPs can be built on rivers of completely different sizes, with different dam heights and with different numbers of shafts. This first power plant, built on the Bavarian River Loisach, has two shafts with a fall height of 2,5 meters.

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