UPSC NOTES & CURRENT AFFAIRS

2021-08-13 16:30:08 #Review
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2021-08-13 09:28:11 ATTENTION

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2021-08-12 17:30:07 ︎S&T - 38

■ SUN'S CORONAL HEATING.

#Space #GS3

◇ Scientists have recently discovered tiny flashes of radio light emanating from all over the Sun,which they say could help in explaining the long-pending coronal heating problem.

◇ These radio lights or signals result from beams of electrons accelerated in the aftermath of a magnetic explosion on the Sun. Magnetic explosions have not been seen but these radio lights are the strongest evidence till date that the tiny magnetic explosions, originally referred to as ‘nanoflares’ can indeed be heating up the corona.

◇ The solar corona, the outer layer of the Sun's atmosphere, is composed of extreme high temperature gas, known as plasma, with temperatures reaching millions of degrees Celsius.

◇ The corona is usually hidden by the bright light of the Sun's surface. That makes it difficult to see without using special instruments. However, the corona can be seen during a total solar eclipse.

︎SOURCE - TH.

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2021-08-11 17:30:04 ︎S&T - 37

■ WINTER DIESEL.

#Defencetech #GS3

□ ABOUT :-

◇ India’s armed forces may soon be using winter diesel for operations in high altitude areas such as Ladakh.

◇ Winter diesel is a specialised fuel that was introduced by Indian Oil Corporation (IOC) last year specifically for high altitude regions and low-temperature regions such as Ladakh, where ordinary diesel can become unusable.

◇ It contains additives to maintain lower viscosity can be used in temperatures as low as -30°C and that besides a low pour point, it had higher cetane rating — an indicator is the combustion speed of diesel and compression needed for ignition— and lower sulphur content, which would lead to lower deposits in engines and better performance.

︎SOURCE - IE.

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2021-08-11 16:30:05 Independence Day Offer - ( 11th to 15th )

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2021-08-10 17:30:06 ︎S&T - 36

■ DEEP FAKES and DEEP NUDES.

#AI_threat #GS3

#Ethics #GS4

Cybercrime officials in India are tracking apps and websites that produce nude photographs of innocent persons using Artificial Intelligence (AI) algorithms.

□ DEEPFAKES.

◇ Deepfake is a portmanteau of “deep learning” and “fake”. It is an Artificial Intelligence (AI) software that superimposes a digital composite on to an existing video (or audio).

◇ Deepfakes are created by machine learning models, which use neural networks to manipulate images and videos.

□ DEEPNUDES.

◇ Deep nudes are computer-generated nude images and videos of innocent persons using
Artificial Intelligence (AI) algorithms.

□ CATFISHING

◇ Another problem is catfish accounts to deceive people.

◇ Catfishing refers to practice of setting up fictitious online profiles, often for luring another into a fraudulent romantic relationship.

︎SOURCE - TH.

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2021-08-10 16:30:02



Target 140+ Marathon Session 5

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2021-08-09 17:30:08 ■ CHINA'S ARTIFICIAL SUN : EAST.

#Space #GS3

China’s Experimental Advanced Superconducting Tokamak (EAST) achieved a peak temperature of 288 million degrees Fahrenheit, which is over ten times hotter than the sun.

□ ABOUT :-

◇ The EAST reactor is an advanced nuclear fusion experimental research device located at the Institute of Plasma Physics of the Chinese Academy of Sciences (ASIPP) in Hefei, China.

◇ EAST first became operational in 2006.

◇ The purpose of the artificial sun is to replicate the process of nuclear fusion, which is the same reaction that powers the sun.

□ SIGNIFICANCE :-

◇ It is significant as far as China’s Green Development is concerned.

◇ Nuclear fusion is a process through which high levels of energy are produced without generating large quantities of waste. Unlike fission, fusion also does not emit greenhouse gases and is considered a safer process with lower risk of accidents.

︎SOURCE - IE.

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