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Светит, но не греет

Светлячки живут на всех континентах, кроме Антарктиды. Одним из самых ярких считается огненосный щелкун (Pyrophorus sp.) из Латинской Америки.

Светимость среднестатистического светлячка составляет всего 0,002 люмена. Чтобы добиться светового потока, как от 60-ваттной лампы накаливания, придётся собрать вместе полмиллиона светлячков.

Зато теплопотери энергии у светлячков составляют всего 2-5%, а у современных светодиодов — десятки процентов.

🙏 Наука.рф

#десятилетиенауки
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Светит, но не греет

Светлячки живут на всех континентах, кроме Антарктиды. Одним из самых ярких считается огненосный щелкун (Pyrophorus sp.) из Латинской Америки.

Светимость среднестатистического светлячка составляет всего 0,002 люмена. Чтобы добиться светового потока, как от 60-ваттной лампы накаливания, придётся собрать вместе полмиллиона светлячков.

Зато теплопотери энергии у светлячков составляют всего 2-5%, а у современных светодиодов — десятки процентов.

🙏 Наука.рф

#десятилетиенауки

BY Наука.рф


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Founder Pavel Durov says tech is meant to set you free The company maintains that it cannot act against individual or group chats, which are “private amongst their participants,” but it will respond to requests in relation to sticker sets, channels and bots which are publicly available. During the invasion of Ukraine, Pavel Durov has wrestled with this issue a lot more prominently than he has before. Channels like Donbass Insider and Bellum Acta, as reported by Foreign Policy, started pumping out pro-Russian propaganda as the invasion began. So much so that the Ukrainian National Security and Defense Council issued a statement labeling which accounts are Russian-backed. Ukrainian officials, in potential violation of the Geneva Convention, have shared imagery of dead and captured Russian soldiers on the platform. "The inflation fire was already hot and now with war-driven inflation added to the mix, it will grow even hotter, setting off a scramble by the world’s central banks to pull back their stimulus earlier than expected," Chris Rupkey, chief economist at FWDBONDS, wrote in an email. "A spike in inflation rates has preceded economic recessions historically and this time prices have soared to levels that once again pose a threat to growth." A Russian Telegram channel with over 700,000 followers is spreading disinformation about Russia's invasion of Ukraine under the guise of providing "objective information" and fact-checking fake news. Its influence extends beyond the platform, with major Russian publications, government officials, and journalists citing the page's posts. Since January 2022, the SC has received a total of 47 complaints and enquiries on illegal investment schemes promoted through Telegram. These fraudulent schemes offer non-existent investment opportunities, promising very attractive and risk-free returns within a short span of time. They commonly offer unrealistic returns of as high as 1,000% within 24 hours or even within a few hours.
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