آموزش فیزیک دبیرستان: مهندس سعید نمازی | United States America (US)

Create: 2025-06-30 Update: 2025-07-09 00:03:15

💻 در سال ۱۹۵۷، در آزمایشگاه‌های سیستمز در کالیفرنیا، دانشمندان از نردبان و تخته‌سیاه برای ترسیم مدارهای ماهواره‌ها استفاده می‌کردند، مدت‌ها قبل از اینکه کامپیوترها این کار را انجام دهند.
این تخته‌ها حاوی معادلات مرجع بودند، نه محاسبات لحظه‌به‌لحظه.
در آن زمان، کامپیوترها در واقع گروهی انسان بودند که ریاضیات پیچیده را اغلب با استفاده از روشی به سبک امدادی معروف به «مهمانی‌های ریاضی» برای کارهایی مانند پیش‌بینی مدارها و فیزیک هسته‌ای حل می‌کردند.
«مهمانی‌های ریاضی» به جلساتی اشاره دارد که در آن گروهی از ریاضیدانان به صورت زنجیره‌ای و با تقسیم کار مسائل پیچیده را و هر شخص بخشی از مسئله را حل می‌کرد و نتیجه را به نفر بعدی منتقل می‌کرد.

@physics_school

آموزش فیزیک دبیرستان: مهندس سعید نمازی

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آموزش فیزیک دبیرستان: مهندس سعید نمازی

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Telegram auto-delete message, expiring invites, and more

elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.

💻 در سال ۱۹۵۷، در آزمایشگاه‌های سیستمز در کالیفرنیا، دانشمندان از نردبان و تخته‌سیاه برای ترسیم مدارهای ماهواره‌ها استفاده می‌کردند، مدت‌ها قبل از اینکه کامپیوترها این کار را انجام دهند.

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