🔭علم نجوم طبیعت🔭🕊 | United States America (US)

Create: 2024-02-18 Update: 2024-05-04 20:37:58

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¹★دانشمندی به نام یونس فوتی در سال 1856 کشف کرد که مولکول کوچک و شفاف دی‌اکسید کربن (CO2) گرما را جذب می‌کند و باعث گرم شدن زمین می‌شود.

²★ دلیل جذب گرما توسط CO2، لرزش مولکول آن است. این لرزش به دلیل تشدید کوانتومی به نام رزونانس فرمی قوی‌تر می‌شود و طیف تشعشعاتی که CO2 جذب می‌کند را گسترده‌تر می‌کند.

³★ ووردزورث و همکارانش معادلاتی برای تخمین گرمایش ناشی از CO2 با استفاده از طیف‌بینی مولکولی و فیزیک اقلیم ارائه کرده‌اند. این معادلات می‌توانند برای تخمین پتانسیل گرمایش گازهای گلخانه‌ای در سیارات دیگر نیز استفاده شوند.

⁴★ این تحقیق نشان می‌دهد که CO2 نقش مهمی در گرمایش زمین دارد و درک بهتر از نحوه عملکرد آن می‌تواند به ما در مقابله با تغییر اقلیم کمک کند. با این حال، تحقیقات بیشتر برای بررسی اثرات سایر گازهای گلخانه‌ای و ابرها بر گرمایش زمین مورد نیاز است.

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🔭علم نجوم طبیعت🔭🕊

🔘پدیده‌ی کوانتومی، تاثیر عظیم یک مولکول کوچک بر گرمایش زمین را توضیح می‌دهد. ¹★ در سال 1856، دانشمند آمریکایی کمتر شناخته‌شده‌ای به نام یونس فوتی، توانایی خارق‌العاده‌ی یک مولکول کوچک و شفاف به نام دی‌اکسید کربن در جذب گرما را کشف کرد. ²★او از یک آزمایش…

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🔭علم نجوم طبیعت🔭🕊

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Telegram and Signal Havens for Right-Wing Extremists

Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.

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