دانشمندان مدت‌هاست می‌دانند که به نظر می‌رسد نور گاهی قبل از ورود به یک ماده، از آن خارج می‌شود، اثری که به عنوان توهم ناشی از تغییر شکل امواج توسط ماده نادیده گرفته می‌شد. اکنون، پژوهشگران دانشگاه تورنتو از طریق آزمایش‌های نوآورانه کوانتومی می‌گویند که ثابت کرده‌اند "زمان منفی" دیگر فقط یک ایده ...
دانشمندان مدت‌هاست می‌دانند که به نظر می‌رسد نور گاهی قبل از ورود به یک ماده، از آن خارج می‌شود، اثری که به عنوان توهم ناشی از تغییر شکل امواج توسط ماده نادیده گرفته می‌شد. اکنون، پژوهشگران دانشگاه تورنتو از طریق آزمایش‌های نوآورانه کوانتومی می‌گویند که ثابت کرده‌اند "زمان منفی" دیگر فقط یک ایده ...
Unlike Silicon Valley giants such as Facebook and Twitter, which run very public anti-disinformation programs, Brooking said: "Telegram is famously lax or absent in its content moderation policy." 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. But Telegram says people want to keep their chat history when they get a new phone, and they like having a data backup that will sync their chats across multiple devices. And that is why they let people choose whether they want their messages to be encrypted or not. When not turned on, though, chats are stored on Telegram's services, which are scattered throughout the world. But it has "disclosed 0 bytes of user data to third parties, including governments," Telegram states on its website. The next bit isn’t clear, but Durov reportedly claimed that his resignation, dated March 21st, was an April Fools’ prank. TechCrunch implies that it was a matter of principle, but it’s hard to be clear on the wheres, whos and whys. Similarly, on April 17th, the Moscow Times quoted Durov as saying that he quit the company after being pressured to reveal account details about Ukrainians protesting the then-president Viktor Yanukovych. False news often spreads via public groups, or chats, with potentially fatal effects.
from it
