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Type: Prelims Only

  • Tribes in News

    Tribes in news: Mundapota Kela

    Prelims Only | Indian Society | Mains Paper 1: Diversity Of India

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Mundapota Kela, Denotified Tribes

    Mains level: Tribal development

    Members of the Mundapota Kela community in Odisha perform an unthinkable act of their head buried in soil, which requires exceptional breath control, for a living.

    Mundapota Kela

    • The community — Mundapota Kela (a denotified tribe) — is left with few members who earn a livelihood with this bizarre act.
    • It is believed to have migrated to Odisha from Rayalaseema area of Andhra Pradesh decades ago.
    • Being street performers, they travel from one village to another and bury their heads in soil for several minutes.
    • They collect rice, vegetables and money from villagers for putting up the show.

    Try answering this PYQ:

    Q.Consider the following statements about Particularly Vulnerable Tribal Groups (PVTGs) in India:

    1. PVTGs reside in 18 States and one Union Territory.
    2. A stagnant or declining population is one of the criteria for determining PVTG status.
    3. There are 95 PVTGs officially notified in the country so far.
    4. Irular and Konda Reddi tribes are included in the list of PVTGs.

    Which of the statements given above are correct?

    (a) 1, 2 and 3

    (b) 2, 3 and 4

    (c) 1, 2 and 4

    (d) 1, 3 and 4

     

    Post your answers here:

     

    Back2Basics: De-Notified Tribes

    • Denotified Tribes (DNTs), also known as Vimukta Jati are the tribes that were listed originally under the Criminal Tribes Act of 1871 as Criminal Tribes.
    • Once a tribe became “notified” as criminal, all its members were required to register with the local magistrate, failing which they would be charged with a “crime” under the Indian Penal Code.
    • The Criminal Tribes Act was repealed in 1949 and thus ‘de-notified’ the tribal communities.
    • The denotified tribes were reclassified as “habitual offenders” in 1959.
    • The UN’s anti-discrimination body Committee on the Elimination of Racial Discrimination (CERD) asked India to repeal the Habitual Offenders Act (1952) and effectively rehabilitate the denotified and nomadic tribes on 9 March 2007.
    • A National Commission for Denotified, Nomadic and Semi-Nomadic Tribes (NCDNSNT) was setup in 2003 to study various developmental aspects under the chairmanship of Shri. Balkrishna Renke.

     

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  • Nobel and other Prizes

    First Nobel for Climate Science

    Prelims Only | Enviro & Biodiversity | Mains Paper 1: Important Geophysical Phenomena

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Nobel Price

    Mains level: Climate Change Assessment

    Three scientists received the Nobel Prize in Physics for work that is essential to understanding how the Earth’s climate is changing, pinpointing the effect of human behaviour on those changes and ultimately predicting the impact of global warming.

    Who are the laureates?

    • The winners were Syukuro Manabe, Klaus Hasselmann of Germany, and Giorgio Parisi from Italy.
    • In 2015, at a UK-based climate-focused online publication sought to identify the three most influential climate change research papers ever published.
    • The paper that received the most votes was one by Syukuro Manabe and Richard Wetherald way back in 1967.
    • These reports for the first time, had described the impact of carbon dioxide and water vapour on global warming.

    Citation for their Climate Model

    • Manabe is a senior meteorologist and climatologist at Princeton University.
    • In the 1960s, he led ground-breaking research into how increased levels of carbon dioxide lead to higher temperatures on the surface of the Earth.
    • This laid the foundation for the development of current climate models.
    • Hasselmann is a German physicist and oceanographer who greatly advanced public understanding of climate change through the creation of a model that links climate and chaotic weather systems.
    • Parisi has focused on quantum field theory and complex systems.

    Why it is significant feat?

    • This is the first-time climate scientists have been awarded the Physics Nobel.
    • The IPCC had won the Peace Nobel in 2007, an acknowledgement of its efforts in creating awareness for the fight against climate change.
    • A Chemistry Nobel was also awarded to Paul Crutzen in 1995, for his work on the ozone layer, is considered the only other time someone from atmospheric sciences has won this honour.
    • The recognition of Manabe and Hasselmann, therefore, is being seen as an acknowledgement of the importance that climate science holds in today’s world.

     

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  • Cyber Security – CERTs, Policy, etc

    What is Border Gateway Protocol (BGP) ?

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Border Gateway Protocol

    Mains level: Internet blackout

    The outages at Facebook, WhatsApp and Instagram occurred because of a problem in the company’s domain name system. At the heart of it was a BGP or Border Gateway Protocol issue.

    What is BGP?

    • Simply put, it is the protocol that runs the internet or makes it work.
    • Since the internet is a network of networks, BGP is the mechanism that bounds it together.
    • When the BGP doesn’t work, internet routers can’t really figure out what to do and that leads to the internet not working.
    • The routers — big ones — keep up on updating other possible routes that are used to deliver network packets to the last possible source.
    • In this case, Facebook platforms were the last point of destination and BGP problem meant Facebook was unable to tell other networks know that it was on the internet.

    How does it work?

    • The BGP is like an entity that is responsible for creating and more importantly updating maps that lead you to sites like Google, Facebook or YouTube.
    • So if someone is responsible for making and updating the map, and they make a mistake, then the traffic — or users — will not end up reaching that place.

    How did a BGP issue affect Facebook?

    • A BGP update message informs a router of any changes you’ve made to a prefix advertisement or entirely withdraws the prefix.
    • There were a lot of routing changes from Facebook last night and then routes were withdrawn, Facebook’s Domain Name Server went offline.

    Role of DNS

    • DNS is the phonebook of the Internet.
    • People access information online through domain names — timesofindia.com or facebook.com.
    • Internet browsers use IP or Internet Protocol addresses and what DNS does is that it translates domain names to IP addresses to browsers can load Internet resources.
    • If DNS is the internet’s phone book, BGP is its postal service.
    • When a user enters data in the internet, BGP determines the best available paths that data could travel.

     

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  • Nobel and other Prizes

    Physiology Nobel for work on temperature and touch

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Nobel Price, Genes controling senses

    Mains level: Read the attached story

     

    U.S. scientists David Julius and Ardem Patapoutian have won the Nobel Medicine Prize for discoveries on receptors for temperature and touch.

    Who are the Laureates?

    • David Julius and Ardem Patapoutian, working independently in the United States, made a series of discoveries in the late 1990s and early 2000s.
    • They figured out the touch detectors in our body and the mechanism through which they communicate with the nervous system to identify and respond to a particular touch.

    What did they discover?

    • They discovered the molecular sensors in the human body that are sensitive to heat, and to mechanical pressure, and make us “feel” hot or cold, or the touch of a sharp object on our skin.
    • n 1997, Dr. Julius and his team published a paper in Nature detailing how capsaicin, or the chemical compound in chili peppers, causes the burning sensation.
    • They created a library of DNA fragments to understand the corresponding genes and finally discovered a new capsaicin receptor and named it TRPV1.
    • This discovery paved the way for the identification of many other temperature-sensing receptors.
    • They identified another new receptor called TRPM8, a receptor that is activated by cold. It is specifically expressed in a subset of pain-and-temperature-sensing neurons.
    • They identified a single gene PIEZO2, which when silenced made the cells insensitive to the poking. They named this new mechanosensitive ion channel Piezo1.

    How do they work?

    • The human ability to sense heat or cold and pressure is not very different from the working of the many detectors that we are familiar with.
    • When something hot, or cold, touches the body, the heat receptors enable the passage of some specific chemicals, like calcium ions, through the membrane of nerve cells.
    • It’s like a gate that opens up on a very specific request. The entry of the chemical inside the cell causes a small change in electrical voltage, which is picked up by the nervous system.
    • There is a whole spectrum of receptors that are sensitive to different ranges of temperature.
    • When there is more heat, more channels open up to allow the flow of ions, and the brain is able to perceive higher temperatures.

    Therapeutic implications

    • Breakthroughs in physiology have often resulted in an improvement in the ability to fight diseases and disorders. This one is no different.
    • There are receptors that make us feel pain. If these receptors can suppress, or made less effective, the person had felt less pain.
    • Chronic pain is present is a number of illnesses and disorders. Earlier, the experience of pain was a mystery.
    • But as we understand these receptors more and more, it is possible that we gain the ability to regulate them in such a way that the pain is minimized.

    [Note: We will compile all Nobel Prizes into a single post once all are awarded.]

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  • ISRO Missions and Discoveries

    IAO Hanle: A promising astronomical observatory

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: IAO Hanle

    Mains level: NA

    A new study shows that the Indian Astronomical Observatory (IAO) located in Hanle is one of the emerging sites for infrared and optical astronomy studies.

    About IAO Hanle

    • The IAO, located in Hanle at Mount Saraswati near Leh in Ladakh, has one of the world’s highest located sites for optical, infrared and gamma-ray telescopes.
    • It was established in 2001 and is operated by the Indian Institute of Astrophysics, Bangalore.
    • It is currently the ninth highest optical telescope in the world, situated at an elevation of 4,500 meters.

    Note: University of Tokyo Atacama Observatory (TAO) located in the Atacama desert of Chile is the highest at an elevation of 5,640 m.

    Major telescopes at Hanle include:

    1. Himalayan Chandra Telescope (An optical-infrared telescope named after India-born Nobel laureate Subrahmanyam Chandrasekhar)
    2. GROWTH-India Telescope (A robotic optical telescope)
    3. High Altitude Gamma Ray Telescope

    Distinct factors of IAO Hanle

    • IAO Hanle offers a clear view of space among all observatories globally.
    • This is due to its advantages of more clear nights, minimal light pollution, background aerosol concentration, extremely dry atmospheric condition and uninterrupted monsoon.
    • Hanle site is as dry as Atacama Desert in Chile and much drier than Devasthal and has around 270 clear nights in a year and is also one of the emerging sites for infrared and submillimetre optical astronomy.
    • This is because water vapor absorbs electromagnetic signals and reduces their strength.

     

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  • Festivals, Dances, Theatre, Literature, Art in News

    Langa-Manganiyar Folk Music

    Prelims Only | History | Mains Paper 1: Arts & Culture

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Langa-Manganiyar

    Mains level: NA

    Considered the repository of the Thar region’s rich history and traditional knowledge, the ballads, folklore and songs of the Langa-Manganiyar artistes are being preserved through an initiative for documentation and digitisation.

    Who are the Langa-Manganiyar?

    • The Langas and Manganiyars are hereditary communities of Muslim musicians residing mostly in western Rajasthan’s Jaisalmer and Barmer districts and in Pakistan’s Tharparkar and Sanghar districts in Sindh.
    • The music of the two marginalised communities, who were supported by wealthy landlords and merchants before Independence, forms a vital part of Thar desert’s cultural landscape.
    • The performances are in multiple languages and dialects including Marwari, Sindhi, Saraiki, Dhatti and Thareli.
    • The romantic tales revolving around legendary lovers such as Umar-Marvi, Heer-Ranjha, Sohni-Mahiwal, Moomal-Rana and Sorath-Rao Khangar have traditionally captivated audiences.

    Instruments used

    • The Langa’s main traditional instrument is the sindhi sarangi; Manganiyar’s is the kamaicha.
    • Both are bowed stringed instruments with skin membrane sounding boards and many sympathetic strings.
    • Both Langas and Manganiyars sing and play the dholak (double-headed barrel drum), the kartal(wooded clappers), the morchan (jaws harp), and the ubiquitous harmonium.

    Try answering this PYQ:

    Q. Consider the following pairs:

    Tradition: State

    1. Chapchar Kut: festival Mizoram
    2. Khongjom Parba ballad: Manipur
    3. Thang Ta dance: Sikkim

    Which of the pairs given above is/are correct?

    (a) 1 only

    (b) 1 and 2

    (c) 3 only

    (d) 2 and 3

     

    Post your answers here.

     

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  • Historical and Archaeological Findings in News

    Chola inscriptions on qualifications for civic officials

    Prelims Only | Indian Society | Mains Paper 1: Arts & Culture

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Kudavolai System

    Mains level: Chola Administration

    In the Kancheepuram district of Tamil Nadu, some Chola-era inscriptions on Kanthaleeswarar Temple bear testimony to the qualifications required for members of the village administrative council.

    Inscription details: Kudavolai System

    • The Kudavolai system was very vital and unique feature of administration of villages of Cholas.
    • In the system one representative is elected from each ward and every village had 30 wards.
    • The village administrative committee was called as variyam.
    • The election was unique as names of contestants were written on palm leaf and put in a pot.

    Taxation details

    • The rulers were considerate while taxing agricultural produce.
    • For areca nuts, only 50% tax would be collected for the first 10 years after cultivation. Farmers would pay full tax only after the trees started yielding fruits.
    • Similarly, 50% tax was imposed on banana crops until the yield.

    Though a tough one, but try answering this PYQ:

    Q.In the context of the history of India, consider the following pairs:

    Term: Description

    1. Eripatti: Land revenue from which was set apart for the maintenance of the village tank
    2. Taniyurs: Villages donated to a single Brahmin or a group of Brahmins
    3. Ghatikas: Colleges generally attached to the temples

    Which of the pairs given above is/are correctly matched?

    (a) 1 and 2

    (b) 3 only

    (c) 2 and 3

    (d) 1 and 3

     

    Post your answers here.

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  • Goods and Services Tax (GST)

    GST collections hit 5-month high

    Prelims Only | Economics | Mains Paper 3: Indian Economy

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Revenue receipts

    Mains level: GST

    India’s gross Goods and Services Tax (GST) revenues crossed ₹1.17 lakh crore in September, hitting a five-month high.

    Take a look towards the share of GST in government earnings for the previous fiscal:

    UPSC can ask about the majority component of the Revenue Receipts of the govt. See how Corporate tax is nearing the GST revenues.

    Do you think it will surpass GST revenue when the economy is fully recovered?

    What is the news?

    • September’s revenues were 23% higher than a year ago and 27.3% more than collections in the pre-pandemic month of September 2019.
    • Revenues from import of goods were 30% higher while indirect tax collected on domestic transactions, including the import of services, were 20% higher in September, compared to the same month in 2020.
    • Among the major States, GST revenues grew 29% in Karnataka, 28% in Gujarat, followed by 22% in Maharashtra and 21% each in Tamil Nadu and Andhra Pradesh.
    • Telangana recorded a 25% surge in revenues, while Odisha saw a sharper 40% rise.

    Significance

    • This clearly indicates that the economy is recovering at a fast pace.
    • Coupled with economic growth, anti-evasion activities, especially action against fake billers have also been contributing to the enhanced GST collections.
    • It is expected that the positive trend in the revenues will continue and the second half of the year will post higher revenues.

    Issues underlying

    • Though GST revenues are picking up pace after the impact of the Covid-19 pandemic, revenue buoyancy under GST is being seen as a concern.
    • This is especially after the legally mandated compensation to states for revenue shortfall from the GST implementation comes to an end in June 2022.

    Back2Basics: Goods and Services Tax

    • The GST is a value-added tax levied on most goods and services sold for domestic consumption.
    • It was launched into operation on the midnight of 1st July 2017.
    • It subsumed almost all domestic indirect taxes (petroleum, alcoholic beverages, and stamp duty are the major exceptions) under one head.
    • The GST is paid by consumers, but it is remitted to the government by the businesses selling the goods and services.
    • GST is levied at four rates viz. 5%, 12%, 18% and 28%. The schedule or list of items that would fall under these multiple slabs is worked out by the GST council.

    Types

    • The GST to be levied by the Centre is called Central GST (CGST) and that to be levied by the States is called State GST (SGST).
    • Import of goods or services would be treated as inter-state supplies and would be subject to Integrated Goods & Services Tax (IGST) in addition to the applicable customs duties.

    The GST Council

    • It is a constitutional body (Article 279A) for making recommendations to the Union and State Government on issues related to GST.
    • The GST Council is chaired by the Union Finance Minister and other members are the Union State Minister of Revenue or Finance and Ministers in charge of Finance or Taxation of all the States.
    • It is considered as a federal body where both the centre and the states get due representation.

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  • Innovations in Biotechnology and Medical Sciences

    What is Computer Tomography?

    Prelims Only | Science Tech | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Computer Tomography (CT) and its working

    Mains level: NA

    The first computed tomography image – a CT scan – of the human brain was made 50 years ago, on Oct. 1, 1971.

    A few months back, almost all of us have heard about the High-resolution computed tomography (HRCT) scan being conducted on our relatives for diagnosing the damage of lungs caused due to the Wuhan Virus.

    About Computer Tomography (CT)

    • A CT scan is a medical imaging technique used in radiology to get detailed images of the body noninvasively for diagnostic purposes.
    • The multiple X-ray measurements taken from different angles are then processed on a computer using reconstruction algorithms to produce tomographic (cross-sectional) images (virtual “slices”) of a body.

    How does it work?

    • They use a narrow X-ray beam that circles around one part of your body. This provides a series of images from many different angles.
    • A computer uses this information to create a cross-sectional picture. Like one piece in a loaf of bread, this two-dimensional (2D) scan shows a “slice” of the inside of your body.
    • This process is repeated to produce a number of slices.
    • The computer stacks these scans one on top of the other to create a detailed image of your organs, bones, or blood vessels.
    • For example, a surgeon may use this type of scan to look at all sides of a tumor to prepare for an operation.

    Its development

    • Since its development in the 1970s, CT has proven to be a versatile imaging technique.
    • While CT is most prominently used in diagnostic medicine, it also may be used to form images of non-living objects.
    • The 1979 Nobel Prize in Physiology or Medicine was awarded jointly to South African-American physicist Allan M. Cormack and British electrical engineer Godfrey N. Hounsfield “for the development of computer-assisted tomography”.

    Threats

    • CT scans use X-rays, which produce ionizing radiation.
    • Such radiation may damage your DNA and lead to cancer.
    • The risk increases with every CT scan we get.
    • Ionizing radiation may be more harmful in children.

     

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  • Air Pollution

    Probe shows use of toxic material in firecrackers: Supreme Court

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Air pollutants in crackers, Green Crackers

    Mains level: Air pollution due to firecrackers

    The Supreme Court has said a preliminary enquiry by the CBI into the firecracker industry, including in Tamil Nadu, revealed rampant violation of its ban on use of toxic ingredients like Barium and its salts.

    Air Pollution created by firecrackers

    • Firing crackers increase the concentration of dust and pollutants in the air.
    • After firing, the fine dust particles get settled on the surrounding surfaces which are packed with chemicals like copper, zinc, sodium, lead, magnesium, cadmium and pollutants like oxides of sulphur and nitrogen.
    • These invisible yet harmful particles affect the environment and in turn, put our health at stake.

    Harmful elements used

    • Copper: Irritates the respiratory tract.
    • Cadmium: Leads to anemia by reducing the capacity of blood to carry oxygen.
    • Zinc: Can cause metal fume fever and induces vomiting.
    • Lead: Harms the nervous system.
    • Magnesium: Metal fume fever is caused by Magnesium fumes.
    • Sodium: It is a highly reactive element and caused burns when it is combined with moisture.

    Why is the issue in news now?

    Ans. Barium content

    • A chemical analysis of the samples of finished and semi-finished firecrackers and raw materials taken from the manufacturers showed Barium content.
    • The court stated that loose quantities of Barium were purchased from the market.
    • Also, firecracker covers did not show the manufacture or expiry dates.

    Issues with Barium

    • Barium nitrate, which emits green flames when a cracker is lit, is a metal oxide that increases both air and noise pollution.
    • There is is no clarity on whether barium nitrate can actually be used or not.

    Alternatives: Green Crackers

    • The new CSIR-NEERI formulation for green crackers has NO barium nitrate — one of the key ingredients of traditional firecrackers.
    • These crackers have been named “safe water releaser (SWAS)”, “safe minimal aluminium (SAFAL)” and “safe thermite cracker (STAR)”.
    • The three crackers release water vapour or air as a dust suppressant and diluent for gaseous emissions.
    • These products can only be manufactured by those who have signed a non-disclosure agreement (NDA) with CSIR-NEERI.
    • The green crackers are sold with a unique logo on the box, and will also have a QR code with production and emission details.

     

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