What does the dragon slain by Saint George represent in the coat of arms of Moscow? Detailed answer

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What does the dragon slain by Saint George represent in the coat of arms of Moscow? Detailed answer

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What does the dragon slain by Saint George represent in the coat of arms of Moscow?

George the Victorious slaying the dragon - a plot known in iconography under the name "George's Miracle about the Serpent" and symbolizing the victory of good over evil, Christianity over the "nasty" - became a symbol of Moscow with the light hand of Prince Yuri Dmitrievich of Zvenigorod and Galicia (1374-1434), son of Dmitry Donskoy.

According to his father's will, Yuri Dmitrievich was to become the Grand Duke of Moscow after the death of his brother Vasily I Dmitrievich, but he was able to take the throne only for a very short time - twice in 1433-1434.

During one of these periods, he ordered the minting of a Moscow coin with the image of his heavenly patron, George the Victorious, slaying the dragon. In the context of that era, the plot was perceived as a sign of the heroic struggle of the Russian people with the "nasty" Golden Horde, on the banners of which a dragon was depicted - an ancient Chinese symbol of happiness.

Author: Kondrashov A.P.

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Cota - technology for charging gadgets over the air 08.04.2015

The developers of Cota wireless charging technology, who spent 8 years on their brainchild, are ready to launch the development into mass production. Cota uses radio waves to transmit power and can charge all the devices in the house at the same time.

Startup Ossia has completed the development of Cota wireless charging technology and is ready to provide it to manufacturers of mobile devices and consumer electronics. The company expects that they will conclude the first contracts for the supply of Cota before the end of 2015, according to InfoWorld.

The development of the technology took 8 years, it was first introduced in 2013. Cota allows you to transfer energy to various electronic devices over the air using radio waves in the same frequency ranges that are used by Wi-Fi and Bluetooth standards.

For the Cota charger to work, it does not matter whether the device being charged lies or is in the pocket of the user, who is constantly moving around the room. The main thing is that this device is within a radius of 10 m from the energy transmitter.

The power transmitter is one of two components of Cota technology. The second component is the chipset, which must be placed in each device that needs to be transferred power. It can be a smartphone, tablet, laptop, smart watch, smoke detector, smart thermostat, etc. The company claims that the size of the chipset will allow it to be built into almost any modern device.

If the device is equipped with a Wi-Fi or Bluetooth antenna, then energy will be received using it. That is, for example, in the case of a smartphone, tablet and laptop, no additional components, in addition to the Cota chipset, will need to be built in. In the case of a thermostat, smoke detector, and other consumer electronics, an antenna will be required if one is not provided by the design.

The principle of operation of Cota is based on focusing the radio signal on the device being charged. This allows it to transmit a signal with a power of 1 W - a third of the power that a USB port provides to a mobile phone. And since the technology is based on a radio wave, devices do not have to be in direct line of sight from the transmitter, as, for example, in one of the Microsoft concepts.

"You don't have to put an energy transmitter in every room. Put it in one place and it will transmit energy to all devices in the house. It's like with Wi-Fi. If your device catches Wi-Fi, then it will receive energy," - Startup founder Hatem Zeine said.

The Ossia startup holds four key patents for Cota's technology in the US, Zane said.

Ossia engineers claim that the new technology is safe for humans - the power of the signal emitted by the energy transmitter is 10 times less than that of a Wi-Fi router.

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