با نهایت تأسف و اندوه فراوان درگذشت ناگهانی و تلخ آقای امیر مهدی چگینی، دانشجوی رشته‌ی شیمی کاربردی دانشگاه خواجه نصیرالدین طوسی را به خانواده محترم ایشان، دوستان و سایر دانشجویان تسلیت عرض می‌نماییم.
با نهایت تأسف و اندوه فراوان درگذشت ناگهانی و تلخ آقای امیر مهدی چگینی، دانشجوی رشته‌ی شیمی کاربردی دانشگاه خواجه نصیرالدین طوسی را به خانواده محترم ایشان، دوستان و سایر دانشجویان تسلیت عرض می‌نماییم.
روحش شاد و یادش گرامی باد.
BY انجمن علمی مهندسی و علم مواد دانشگاه صنعتی خواجه نصیرالدین طوسی
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"Someone posing as a Ukrainian citizen just joins the chat and starts spreading misinformation, or gathers data, like the location of shelters," Tsekhanovska said, noting how false messages have urged Ukrainians to turn off their phones at a specific time of night, citing cybersafety. For Oleksandra Tsekhanovska, head of the Hybrid Warfare Analytical Group at the Kyiv-based Ukraine Crisis Media Center, the effects are both near- and far-reaching. Artem Kliuchnikov and his family fled Ukraine just days before the Russian invasion. 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. 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.
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