Исследователи из Китая создали фотохромное стекло, которое меняет цвет при облучении зеленым лазером и при этом остается стабильным на протяжении долгого времени. Его можно использовать в качестве перезаписываемого оптического хранилища информации.
Исследователи из Китая создали фотохромное стекло, которое меняет цвет при облучении зеленым лазером и при этом остается стабильным на протяжении долгого времени. Его можно использовать в качестве перезаписываемого оптического хранилища информации.
The Dow Jones Industrial Average fell 230 points, or 0.7%. Meanwhile, the S&P 500 and the Nasdaq Composite dropped 1.3% and 2.2%, respectively. All three indexes began the day with gains before selling off. "He has kind of an old-school cyber-libertarian world view where technology is there to set you free," Maréchal said. The gold standard of encryption, known as end-to-end encryption, where only the sender and person who receives the message are able to see it, is available on Telegram only when the Secret Chat function is enabled. Voice and video calls are also completely encrypted. He floated the idea of restricting the use of Telegram in Ukraine and Russia, a suggestion that was met with fierce opposition from users. Shortly after, Durov backed off the idea. In February 2014, the Ukrainian people ousted pro-Russian president Viktor Yanukovych, prompting Russia to invade and annex the Crimean peninsula. By the start of April, Pavel Durov had given his notice, with TechCrunch saying at the time that the CEO had resisted pressure to suppress pages criticizing the Russian government.
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