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Kalashnikov presented the SV 21 rifle with interchangeable barrels Kalashnikov presented the SV 21 rifle with interchangeable barrels

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Kalashnikov presented the SV-21 rifle with interchangeable barrels

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JSC Concern Kalashnikov presented at the Army-2022 forum the SV-21 rifle with manual reloading with interchangeable barrels chambered for 7.62x54R and .308WIN.

The rifle is built according to the “carrying bolt box” scheme with a hanging barrel and a tubular forearm. The shutter is locked on the barrel sleeve.

Barrels with a length of 530, 620 and 650 mm and the shutter larvae are interchangeable. Users can independently perform the replacement of the barrel for the desired cartridge outside the gun shop. The bolt has a firing pin cocking indicator, fixed both by touch and visually, and the bolt release button is located at the base of the 1913-MIL-STD rail.

Kalashnikov presented the SV-21 rifle with interchangeable barrels

The rifle has an interchangeable grip compatible with the AR15 system grips in terms of its seat; stores from the Tiger carbine for the corresponding cartridge with a capacity of 10 rounds are used for ammunition. The trigger mechanism is compatible in terms of seats with the trigger mechanism of the Remington 700 series rifle.

Weight without cartridges with a barrel length of 650 mm is 5.2 kg, the total length is 1300 mm.

Earlier, at the same exhibition, an updated Kalashnikov assault rifle was presented.

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“Definitely one of the best remakes of the decade” – fans are delighted with the gameplay trailer of the Dead Space remake

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Definitely one of the best remakes of the decade

Electronic Arts and developers EA Motive have released a gameplay trailer for the Dead Space remake, which is based on the Frostbite engine and will bring improved gameplay.

According to the plot, the events of Dead Space unfold on board the Ishimura ship. Engineer Isaac Clark is confronted by Necromorphs – the dead crew members of the Ishimura, resurrected and turned into monsters.

Definitely one of the best remakes of the decade

The video, which lasts more than two minutes, is full of gameplay elements: battles with necromorphs, exploration of the Ishimura, scenes in weightlessness.

User response has been very positive, with some of the reviews listed below:

  • Definitely one of the best remakes of the decade.
  • The new graphics are great and the weightless effect from Dead Space 2 looks phenomenal
  • I never thought that I would have to subject myself to such horror again, and yet here we are.
  • I’m excited about the remake. This game has become a legend
  • The intro to this game is still one of the creepiest in history.
  • I’m fucking excited about the remake
  • Everything about this game is amazing. Sound effects, atmosphere, voice acting, enhancements and game mechanics… all of it. I will definitely buy it

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Nobel Prize in Chemistry awarded to three scientists for “development of click chemistry and bioorthogonal chemistry”

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Nobel Prize in Chemistry awarded to three scientists for development

The 2022 Nobel Prize in Chemistry has been awarded to a group of scientists – the Americans Caroline Bertozzi and Barry Sharpless, as well as the Dane Morten Meldal. This was announced on Wednesday by the Nobel Committee of the Royal Academy of Sciences.

Nobel Prize in Chemistry awarded to three scientists for

Scientists became laureates for “the development of click chemistry and bioorthogonal chemistry,” the committee’s reasoning statement says. As the secretary of the Nobel Committee announced, in this way the researchers contributed to the functional way of building molecules.

This year’s Chemistry Prize was awarded not for something super complicated, but for work on something that, on the contrary, is easy and simple. Functional molecules can even be created directly”, commented Johan Okvist, Chairman of the Nobel Committee for Chemistry.

This is the second Nobel Prize for Sharpless. In 2001, he already became its laureate together with William Knowles (USA) and Ryoji Noiori (Japan) for the discovery of catalysts for the production of so-called mirror molecules necessary for pharmaceuticals. This time, Sharpless took the first step by coming up with the concept of click chemistry, which is a form of simple and robust chemistry where reactions occur quickly and avoid unwanted by-products.

Soon, he and Meldal, individually, introduced what is now considered the crown jewel of click chemistry—copper-catalyzed azide-alkyne cycloaddition, an efficient chemical reaction that is in widespread use today. It is used in pharmaceuticals, for DNA mapping and the creation of materials adapted for specific purposes.

Bertozzi took click chemistry to the next level by developing click reactions within living organisms to map important but elusive biomolecules on the surface of cells called glycans. Its bioorthogonal reactions proceed without disturbing the normal chemistry of the cell. All over the world, these reactions are used to study cells and monitor biological processes. With their help, scientists have been able to increase the targeting of anti-cancer drugs that are currently undergoing clinical trials.

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500 fps in Overwatch 2 at 1440p and Ultra settings. Only the GeForce RTX 4090 can do this.

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500 fps in Overwatch 2 at 1440p and Ultra settings

A few hours before the release of Overwatch 2, Nvidia published an infographic in which they presented performance data for various current models of their video cards in the game. Of course, all the attention here is on the new GeForce RTX 40 (Ada Lovelace) models.

500 fps in Overwatch 2 at 1440p and Ultra settings

According to Nvidia official data, the GeForce RTX 4090 is the only model that, at a resolution of 2560 x 1440 pixels and ultra settings, can provide frame rates in excess of 500 fps. The result is, of course, impressive. And it is even more impressive against the background of the GeForce RTX 4080, which is one step lower with 16 GB of memory – this model is capable of only 368 fps under the same conditions. However, both of these models are suitable for 360-Hz monitors.

1664968012 195 500 fps in Overwatch 2 at 1440p and Ultra settings

The performance gaps between the GeForce RTX 4080 12GB, RTX 3080 and RTX 3070 are not that big anymore, but still noticeable.

Nvidia recommends using the GeForce RTX 3080 Ti when playing games at Full HD resolutions above 360Hz, while the GeForce RTX 3060 can be used with Full HD monitors that support 144Hz.

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