Коллега @atomicjorik выложил видео как наш университетский исследовательский реактор заработал на мощность 500 кВт после долгого перерыва.
Во-первых, поздравляем всех с этим событием.
Во-вторых, что за подсветка? Это не подсветка, это Черенковское излучение. Свечение, вызываемое в прозрачной среде заряженной частицей, движущейся со скоростью, превышающей фазовую скорость распространения света в этой среде. Павел Черенков профессор МИФИ с 1951 года.
Коллега @atomicjorik выложил видео как наш университетский исследовательский реактор заработал на мощность 500 кВт после долгого перерыва.
Во-первых, поздравляем всех с этим событием.
Во-вторых, что за подсветка? Это не подсветка, это Черенковское излучение. Свечение, вызываемое в прозрачной среде заряженной частицей, движущейся со скоростью, превышающей фазовую скорость распространения света в этой среде. Павел Черенков профессор МИФИ с 1951 года.
But the Ukraine Crisis Media Center's Tsekhanovska points out that communications are often down in zones most affected by the war, making this sort of cross-referencing a luxury many cannot afford. Given the pro-privacy stance of the platform, it’s taken as a given that it’ll be used for a number of reasons, not all of them good. And Telegram has been attached to a fair few scandals related to terrorism, sexual exploitation and crime. Back in 2015, Vox described Telegram as “ISIS’ app of choice,” saying that the platform’s real use is the ability to use channels to distribute material to large groups at once. Telegram has acted to remove public channels affiliated with terrorism, but Pavel Durov reiterated that he had no business snooping on private conversations. Sebi said data, emails and other documents are being retrieved from the seized devices and detailed investigation is in progress. What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm. Right now the digital security needs of Russians and Ukrainians are very different, and they lead to very different caveats about how to mitigate the risks associated with using Telegram. For Ukrainians in Ukraine, whose physical safety is at risk because they are in a war zone, digital security is probably not their highest priority. They may value access to news and communication with their loved ones over making sure that all of their communications are encrypted in such a manner that they are indecipherable to Telegram, its employees, or governments with court orders.
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