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GS Paper: GS3-16.Achievements of Indians in Science & Technology

  • Near Field Communication (NFC) technology for instant payments

    Google Pay has recently launched a new feature in India, ‘Tap to pay for UPI’, in collaboration with Pine Labs. The feature makes use of Near Field Communication (NFC) technology.

    What is Near Field Communication (NFC)?

    • NFC is a short-range wireless connectivity technology that allows NFC-enabled devices to communicate with each other and transfer information quickly and easily with a single touch.
    • It makes possible to pay bills, exchange business cards, download coupons, or share a document.

    How does it work?

    • NFC transmits data through electromagnetic radio fields, to enable communication between two devices. Both devices must contain NFC chips, as transactions take place within a very short distance.
    • NFC-enabled devices must be either physically touching or within a few centimetres from each other for data transfer to occur.

    When did NFC tech start?

    • In 2004, consumer electronics companies, Nokia, Philips and Sony together formed the NFC Forum, which outlined the architecture for NFC technology to create powerful new consumer-driven products.
    • Nokia released the first NFC-enabled phone in 2007.

    How will this technology work with the recently launched feature, ‘Tap to pay for UPI’?

    • Google Pay has been the first among UPI apps to bring the Tap to Pay feature working on POS terminals.
    • It will allow users with UPI accounts configured on Google Pay to make payments just by tapping their NFC-enabled Android smartphones on any Pine Labs Android POS terminal.
    • Once users tap their phones on the POS terminal, it will automatically open the Google pay app with the payment amount pre-filled.
    • Users can then verify the amount and merchant name and authenticate the payment, using their UPI PIN.
    • The process is much faster compared to scanning a QR code or entering the UPI-linked mobile number which has been the conventional way till now.

    What are the other applications of NFC technology?

    • NFC tech has a wide range of applications besides driving payment services.
    • It is used in contactless banking cards to perform money transactions or to generate contact-less tickets for public transport.
    • Contactless cards and readers use NFC in several applications from securing networks and buildings to monitoring inventory and sales, preventing auto theft, keeping tabs on library books,
    • NFC is behind the cards that we wave over card readers in subway turnstiles and on buses to check tickets.
    • It is present in speakers, household appliances, and other electronic devices that we monitor and control through our smartphones.
    • With just a touch, NFC can also set up WiFi and Bluetooth devices in our homes, investopedia noted.
    • It also has an application in healthcare, to monitor patient stats through NFC-enabled wristbands.
    • NFC is used in wireless charging too.

    How safe is this technology?

    • NFC technology is designed for an operation between devices within a few centimetres from each other.
    • This makes it difficult for attackers to record the communication between the devices compared to other wireless technologies which have a working distance of several metres, according to the NFC forum, a non-profit industry association.
    • The user of the NFC-enabled device determines by the touch gesture which entity the NFC communication should take place with, making it more difficult for the attacker to get connected.
    • The security level of the NFC communication is by default higher compared to other wireless communication protocols.

    Where does it stand in comparison to other wireless technologies?

    • There are other wireless technologies available which are replacing cable-based connections.
    • The IrDa technology is a short range (a few metres) connection based on the exchange of data over infrared light where the two communication devices must be positioned within a line of sight.
    • Today, this technology is mainly used for remote control devices. For larger data communication with computer devices this technology was replaced by Bluetooth or WiFi connections.
    • However, for these technologies’ receiver devices need their own power supply due to the larger working distance.
    • Therefore, the receiving device cannot be powered by the radiofrequency (RF) field like in NFC, the NFC forum highlighted.
    • Another consequence of the larger working distance is the need for the user to configure their device and to pair them together for communication.

     

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  • Kavach: the Indian technology that can prevent collision of Trains

    Kavach, this indigenously developed Automatic Train Protection System is earmarked for aggressive rollout on 2,000 km in 2022-23, according the Budget proposals.

    What is Kavach?

    • It is India’s very own automatic protection system in development since 2012, under the name Train Collision Avoidance System (TCAS), which got rechristened to Kavach or “armour”.
    • Simply put, it is a set of electronic devices and Radio Frequency Identification devices installed in locomotives, in the signalling system as well the tracks.
    • They connect to each other using ultra high radio frequencies to control the brakes of trains and also alert drivers, all based on the logic programmed into them.

    Key features of Kavach

    • One of its features is that by continuously refreshing the movement information of a train, it is able to send out triggers when a loco pilot jumps signal, called Signal Passed at Danger (SPAD).
    • The devices also continuously relay the signals ahead to the locomotive, making it useful for loco pilots in low visibility, especially during dense fog.
    • It includes the key elements from already existing, and tried and tested systems like the European Train Protection and Warning System, and the indigenous Anti Collison Device.
    • It will also carry features of the high-tech European Train Control System Level-2 in future.
    • The current form of Kavach adheres to the highest level of safety and reliability standard called Safety Integrity Level 4.

    What is the upgrade?

    • In the new avatar, India wants to position Kavach as an exportable system, a cheaper alternative to the European systems in vogue across the world.
    • While now Kavach uses Ultra High Frequency, work is on to make it compatible with 4G Long Term Evolution (LTE) technology and make the product for global markets.
    • Work is on to make the system such that it can be compatible with other already installed systems globally.

    How far is the rollout?

    • So far, Kavach has been deployed on over 1,098 km and 65 locomotives in ongoing projects of the South Central Railway.
    • In future it will be implemented on 3000 km of the Delhi-Mumbai and Delhi-Howrah corridors where the tracks and systems are being upgraded to host a top speed of 160 kmph.
    • Further, over 34,000 km on the High Density Network (HDN) and Highly Utilized Network (HUN) of on the Golden Quadrilateral have been included in its sanctioned plans.

     

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  • Egypt hikes Suez Canal transit fees for ship

    Cash-strapped Egypt increased transit fees for ships passing through the Suez Canal, one of the world’s most crucial waterways, with hikes of up to 10%.

    Suez Canal

    • The Suez Canal is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez; and dividing Africa and Asia.
    • Constructed by the Suez Canal Company between 1859 and 1869, it officially opened on 17 November 1869.
    • The canal was earlier controlled by British and French interests in its initial years but was nationalized in 1956 by Egypt’s then leader Gamal Abdel Nasser.
    • It extends from the northern terminus of Port Said to the southern terminus of Port Tewfik at the city of Suez.
    • Its length is 193.30 km including its northern and southern access channels.

    Its significance

    • The Suez Canal provides a crucial link for oil, natural gas and cargo being shipping from East to West.
    • About 10% of global trade, including 7% of the world’s oil, flows through the Suez Canal.
    • It provides a major shortcut for ships moving between Europe and Asia, who before its construction had to sail around Africa to complete the same journey.
    • As per a report, the canal is a major source of income for Egypt’s economy, with the African country earning $5.61 billion in revenues from it last year.

    Try this PYQ:

    Q.Between India and East Asia, the navigation time and distance can be greatly reduced by which of the following?

    1. Deepening the Malacca straits between Malaysia and Indonesia.
    2. Opening a new canal across the Kra isthmus between the Gulf of Siam and Andaman sea.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

     

    [wpdiscuz-feedback id=”3lvew8ij5q” question=”Please leave a feedback on this” opened=”1″]Post your answers here.[/wpdiscuz-feedback]

     

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  • [pib] Quantum Key Distribution

    A joint team of scientists from DRDO and IIT Delhi, for the first time in the country successfully demonstrated Quantum Key Distribution (QKD) link between Prayagraj and Vindhyachal in Uttar Pradesh, a distance of more than 100 kilometers.

    What is QKD Technology?

    • Quantum key distribution (QKD) is a secure communication method that implements a cryptographic protocol involving components of quantum mechanics.
    • It enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages.
    • It gives the ability of the two communicating users to detect the presence of any third party trying to gain knowledge of the key.
    • This is a result of a fundamental aspect of quantum mechanics: the process of measuring a quantum system, in general, disturbs the system.
    • By using quantum superposition or quantum entanglement and transmitting information in quantum states, a communication system can be implemented that detects data leak.

    How does it work?

    • QKD works by transmitting many light particles, or photons, over fiber optic cables between parties.
    • Each photon has a random quantum state, and collectively, the photons sent make up a stream of ones and zeros.
    • This stream of quantum states that make up ones and zeros are called qubits — the equivalent of bits in a binary system.
    • When a photon reaches its receiving end, it will travel through a beam splitter, which forces the photon to randomly take one path or another into a photon collector.
    • The receiver will then respond to the original sender with data regarding the sequence of the photons sent, and the sender will then compare that with the emitter, which would have sent each photon.

    Benefits offered

    • It allows the detection of data leak or hacking because it can detect any such attempt.
    • It also allows the process of setting the error level between the intercepted data in dependence.

     

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  • A miracle cure against HIV

    There is considerable excitement in the world of medicine after scientists reported that a woman living with HIV (Human Immunodeficiency Virus) and administered an experimental treatment is likely ‘cured’.

    What is HIV/AIDS?

    • HIV (human immunodeficiency virus) is a virus that attacks cells that help the body fight infection, making a person more vulnerable to other infections and diseases.
    • First identified in 1981, HIV is the cause of one of humanity’s deadliest and most persistent epidemics.
    • It is spread by contact with certain bodily fluids of a person with HIV, most commonly during unprotected sex, or through sharing injection drug equipment.
    • If left untreated, HIV can lead to the disease AIDS (acquired immunodeficiency syndrome).
    • The human body can’t get rid of HIV and no effective HIV cure exists.

    Treating HIV

    • However, by taking HIV medicine (called antiretroviral therapy or ART), people with HIV can live long and healthy lives and prevent transmitting HIV to their sexual partners.
    • In addition, there are effective methods to prevent getting HIV through sex or drug use, including pre-exposure prophylaxis (PrEP) and post-exposure prophylaxis (PEP).

    What is the new breakthrough?

    • US researchers have described the case of a 60-year-old African American woman who was diagnosed with an HIV infection in 2013.
    • She was started on the standard HIV treatment regimen of anti-retroviral treatment (ART) therapy consisting of tenofovir, emtricitabine, and raltegravir.
    • She was given cord blood, or embryonic stem cells, from a donor with a rare mutation that naturally blocks the HIV virus from infecting cells.
    • She was also given blood stem cells, or adult stem cells, from a relative.

    What actually worked?

    • The adult stem cells boosted the patient’s immunity and possibly helped the cord blood cells fully integrate with the lady’s immune system.
    • Now she has no sign of HIV in her blood and also has no detectable antibodies to the virus.
    • Embryonic stem cells are potentially able to grow into any kind of cell and hence their appeal as therapy, though there is no explanation for why this mode of treatment appeared to be more effective.

    Is this treatment the long-sought cure for AIDS?

    • Not at all. While this approach is certainly a welcome addition to the arsenal of treatments, stem cell therapy is a cumbersome exercise and barely accessible to most HIV patients in the world.
    • Moreover, this requires stem cells from that rare group of individuals with the beneficial mutation.
    • Anti-retroviral therapy, through the years, has now ensured that HIV/AIDS isn’t always a death sentence and many with access to proper treatment have lifespans comparable to those without HIV.
    • A vaccine for HIV or a drug that eliminates the virus is still elusive and would be the long-sought ‘cure’ for HIV/AIDS.

    What is the prevalence of HIV/AIDS in India?

    • As per the India HIV Estimation 2019 report, the estimated adult (15 to 49 years) HIV prevalence trend has been declining in India since the epidemic’s peak in the year 2000 and has been stabilizing in recent years.
    • In 2019, HIV prevalence among adult males (15–49 years) was estimated at 0.24% and among adult females at 0.20% of the population.
    • There were 23.48 lakh Indians living with HIV in 2019.
    • Maharashtra had the maximum at 3.96 lakh followed by Andhra Pradesh (3.14 lakh) and Karnataka.
    • ART is freely available to all those who require and there are deputed centers across the country where they can be availed from.

     

     

  • Small Satellite Launch Vehicle (SSLV)

    The new chairman of the ISRO Dr S Somanath has indicated inauguration of indigenous new launch rockets, called the Small Satellite Launch Vehicle (SSLV).

    What is SSLV?

    • The SSLV is a small-lift launch vehicle being developed by the ISRO with payload capacity to deliver:
    1. 600 kg to Low Earth Orbit (500 km) or
    2. 300 kg to Sun-synchronous Orbit (500 km)
    • It would help launching small satellites, with the capability to support multiple orbital drop-offs.
    • In future a dedicated launch pad in Sriharikota called Small Satellite Launch Complex (SSLC) will be set up.
    • A new spaceport, under development, near Kulasekharapatnam in Tamil Nadu will handle SSLV launches when complete.
    • After entering the operational phase, the vehicle’s production and launch operations will be done by a consortium of Indian firms along with NewSpace India Limited (NSIL).

    Vehicle details

    (A) Dimensions

    • Height: 34 meters
    • Diameter: 2 meters
    • Mass: 120 tonnes

    (B) Propulsion

    • It will be a four stage launching vehicle.
    • The first three stages will use Hydroxyl-terminated polybutadiene (HTPB) based solid propellant, with a fourth terminal stage being a Velocity-Trimming Module (VTM).

    SSLV vs. PSLV: A comparison

    • The SSLV was developed with the aim of launching small satellites commercially at drastically reduced price and higher launch rate as compared to Polar SLV (PSLV).
    • The projected high launch rate relies on largely autonomous launch operation and on overall simple logistics.
    • To compare, a PSLV launch involves 600 officials while SSLV launch operations would be managed by a small team of about six people.
    • The launch readiness period of the SSLV is expected to be less than a week instead of months.
    • The SSLV can carry satellites weighing up to 500 kg to a low earth orbit while the tried and tested PSLV can launch satellites weighing in the range of 1000 kg.
    • The entire job will be done in a very short time and the cost will be only around Rs 30 crore for SSLV.

    Significance of SSLV

    • SSLV is perfectly suited for launching multiple microsatellites at a time and supports multiple orbital drop-offs.
    • The development and manufacture of the SSLV are expected to create greater synergy between the space sector and private Indian industries – a key aim of the space ministry.

    Back2Basics:

  • Gaganyaan and other new Missions in 2022

    After a rather muted 2021 in terms of satellite launches, Indian Space Research Organization (ISRO) is gearing up for a number of missions in 2022 including the launch of the first unmanned mission of Gaganyaan.

    Gaganyaan Mission

    • Gaganyaan is crewed orbital spacecraft intended to be the formative spacecraft of the Indian Human Spaceflight Programme (IHSP).
    • The IHSP was initiated in 2007 by ISRO to develop the technology needed to launch crewed orbital spacecraft into low Earth orbit.
    • The first uncrewed flight, named Gaganyaan 1, is scheduled to launch no earlier than June 2022 on a GSLV Mark III rocket.
    • ISRO had been working on related technologies and it performed a Crew Module Atmospheric Re-entry Experiment and a Pad Abort Test for the mission.
    • If completed in meantime, India will become the fourth nation to conduct independent human spaceflight after the Russia, US and China.

    Details of the project

    • The spacecraft is being designed to carry three people, and a planned upgraded version will be equipped with rendezvous and docking capability.
    • In its maiden crewed mission, this capsule will orbit the Earth at 400 km altitude for up to seven days with a two or three-person crew on board.
    • This Hindustan Aeronautics Limited (HAL) manufactured crew module had its first un-crewed experimental flight in 2014.
    • DRDO will provide support for critical human-centric systems and technologies like space-grade food, crew healthcare, radiation measurement and protection, parachutes for the safe recovery of the crew module and fire suppression system.

    Other missions this year

    • Earth Observation Satellites: EOS-4 and EOS-6
    • Flights for Crew Escape System of Gaganyaan
    • Chandrayaan-03
    • Aditya Ll
    • XpoSat

    New projects

    • Venus mission
    • DISHA –a twin aeronomy satellite mission
    • TRISHNA, an ISRO-CNES [Centre national d’études spatiales] mission

     

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  • Dhawan-1: India’s first privately developed Cryogenic Rocket

    Skyroot Aerospace successfully tested Dhawan-1 last month. It became the country’s first privately developed fully cryogenic rocket engine.

    Dhawan-1

    • The indigenous engine was developed using 3D printing with a superalloy.
    • It runs on two high-performance rocket propellants — liquid natural gas (LNG) and liquid oxygen (LoX).
    • This was after successfully designing and developing the solid propulsion rocket engine, the first private firm in the country to do so.

    Other projects by Skyroot

    • Skyroot is working simultaneously on different stages of both solid propulsion and liquid propulsion engines.
    • It is named after eminent scientists, like Kalam (Abdul Kalam) series for the former and Dhawan (Satish Dhawan).
    • The launch vehicles are named after Vikram Sarabhai.

     

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  • Shale and its potential in India

    Cairn Oil & Gas has announced that it is partnering US-based Halliburton to start shale exploration in the Lower Barmer Hill formation, Western Rajasthan.

    What is Shale oil?

    • Shale oil is an unconventional oil produced from oil shale rock fragments by pyrolysis, hydrogenation, or thermal dissolution.
    • These processes convert the organic matter within the rock (kerogen) into synthetic oil and gas.
    • The refined products can be used for the same purposes as those derived from crude oil.

     How does it differ from conventional crude oil?

    • The key difference between shale oil and conventional crude is that the former, also called ‘tight oil’, is found in smaller batches, and deeper than conventional crude deposits.
    • Its extraction requires creation of fractures in oil and gas rich shale to release hydrocarbons through a process called hydraulic fracking.

    What is fracking?

    • Fracking is the process of drilling down into the earth before a high-pressure water mixture is directed at the rock to release the gas inside.
    • Water, sand and chemicals are injected into the rock at high pressure which allows the gas to flow out to the head of the well.
    • The process can be carried out vertically or, more commonly, by drilling horizontally to the rock layer, which can create new pathways to release gas or used to extend existing channels.
    • The term fracking refers to how the rock is fractured apart by the high-pressure mixture.

    Shale production in the world

    • Russia and the US are among the largest shale oil producers in the world.
    • With a surge in shale oil production in the US, it has played a key role in turning the country from an importer of crude to a net exporter in 2019.

    Shale reserves in India

    • As per the US EIA 2015 report, India has got technically recoverable shale gas of 96 trillion cubic feet.
    • The recoverable reserves are identified in Cambay, Krishna – Godavari, Cauvery, Damodar Valley, Upper Assam, Pranahita – Godavari, Rajasthan and Vindhya Basins.
    • The ONGC has drilled the first exploratory shale gas well in Jambusar near Vadodara, Gujarat, in Cambay basin during October 2013.

    What are the prospects of shale oil exploration in India?

    • Currently, there is no large-scale commercial production of shale oil and gas in India.
    • Shale oil and gas exploration faces several challenges other than environmental concerns around massive water requirements for fracking and potential for ground water contamination.
    • State-owned ONGC had, in 2013, started exploration and, by the end of FY21, assessed shale oil and gas potential in 25 nomination blocks.
    • But it has reduced investments over the past few years after only getting limited success in shale exploration efforts.

     

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  • Katol L6 Chondrite Meteorite

    Last month, researchers from the Geological Survey of India collected some meteorite fragments near the town of Katol in Nagpur in 2012. Studying this, IIT Kgp researchers have unravelled the composition expected to be present in the Earth’s lower mantle which is at about 660 km deep.

    Katol L6

    • Initial studies revealed that the host rock was mainly composed of olivine, an olive-green mineral.
    • Olivine is the most abundant phase in our Earth’s upper mantle.
    • Our Earth is composed of different layers including the outer crust, followed by the mantle and then the inner core.

    Key findings: Presence of Bridgmanite

    • The study reported for the first time, presence of veins of the mineral bridgmanite, which is the most abundant mineral in the interior of the Earth, within the Katol L6 Chondrite meteorite.
    • Bridgmanite consists of magnesium, iron, calcium aluminium oxide and has a perovskite structure. It is the most volumetrically abundant mineral of the Earth’s interior.
    • It is present in the lower mantle (from 660 to 2700 km), and it is important to understand its formation mechanism to better comprehend the origin and evolution of planetary interiors.

    What is the hypothesis of moon-formation?

    The discovery of Bridgmanite in Katol L6 adds evidence to the Moon-forming giant impact hypothesis.

    • The Moon-forming giant impact hypothesis occurred nearly 4.5 billion years ago.
    • The Earth collided with a planet the size of Mars named Thela.
    • The force of this impact was so huge as to melt the Earth down from the surface to a depth of 750 km to 1,100 km.
    • The hypothesis goes that this caused the Earth to be bathed in a magma ocean, and the ejecta from the collision led to the formation of the Moon.

    Note: Earth was an ocean of magma in the past.  The heavier iron and nickel went to the core while the lighter silicates stayed in the mantle.

    Future prospect of the study

    • This finding could help investigations of high-pressure phase transformation mechanisms in the deep Earth.

    Back2Basics: Interior of Earth

    Earths Structure

    ​​The earth is made up of three different layers: the crust, the mantle and the core.

    The crust

    This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly com​posed of basalt.  Continental crust is less dense, thicker, and mainly composed of granite.

    The mantle

    The mantle lies below the crust and is up to 2900 km thick.  It consists of hot, dense, iron and magnesium-rich solid rock. The crust and the upper part of the mantle make up the lithosphere, which is broken into plates, both large and small.

    The core

    The core is the centre of the earth and is made up of two parts: the liquid outer core and solid inner core. The outer core is made of nickel, iron and molten rock. Temperatures here can reach up to 50,000 C.

     

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