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  • International Liquid Mirror Telescope (ILMT)

    The four-meter International Liquid Mirror Telescope (ILMT) saw the first light recently, gazing out from its vantage on Devasthal, a hill in Uttarakhand.

    What is the ILMT?

    • The telescope has been built by a collaboration of scientists from Canada, Belgium and India.
    • It is located at an altitude of 2,450 metres on the Devasthal Observatory campus of the Aryabhata Research Institute of Observational Sciences (ARIES) in Nainital district.
    • A large pool of mercury placed in a vessel is spun around so fast that it curves into a parabolic shape. Since mercury is reflective, this shape helps in focusing the reflected light.
    • Nearly 50 litres of mercury, weighing close to 700 kilograms, is spun hard to form a paraboloid mirror of just 4 mm thickness and a diameter of about 4 metres.
    • A thin sheet of mylar protects the mercury from the wind.
    • Once it starts making observations, the telescope will collect gigabytes of data, which will need to be analysed using artificial intelligence and machine learning (AI and ML) tools.

    It’s utility

    • The telescope will make sky surveys possible and obtain images that can help observe transient phenomena.
    • It will help analyse events such as supernovae and record the presence of space debris or meteorites — basically, watch the skies.

    What is the first image?

    • The first image made by the telescope consisted of several stars and a galaxy, NGC 4274, which is 45 million light years away.
    • The telescope, having a primary mirror that is liquid, cannot be turned and pointed in any direction.
    • It “stares” at the zenith and watches the sky as the earth rotates, thereby giving a view of different objects.
    • This property can be used to scan and survey the sky, and observe transients and moving objects such as meteorites.
    • It will work in tandem with the existing 3.6-metre Devasthal Optical Telescope.

     

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  • Back in news: Non-Resident Indians (NRIs)

    A national helpline for women deserted in Non-Resident Indian (NRI) marriages and the need for a dedicated fund to provide assistance to them are among the recommendations made at a consultation organized by the National Commission for Women (NCW).

    What are the issues faced by NRI wives?

    • Abandon after marriage
    • Inconclusive divorces filed abroad
    • Child custody disputes

    Classification of Overseas Indians

    Overseas Indians, officially known as Non-resident Indians (NRIs) or Persons of Indian Origin (PIOs), are people of Indian birth, descent or origin who live outside the Republic of India:

    (A) Non-Resident Indian (NRI)

    • Strictly asserting non-resident refers only to the tax status of a person who, as per section 6 of the Income-tax Act of 1961, has not resided in India for a specified period for the purposes of the Act.
    • The rates of income tax are different for persons who are “resident in India” and for NRIs.

    (B) Person of Indian Origin (PIO)

    Person of Indian Origin (PIO) means a foreign citizen (except a national of Pakistan, Afghanistan, Bangladesh, China, Iran, Bhutan, Sri Lanka and/or Nepal), who:

    • at any time held an Indian passport OR
    • either of their parents/grandparents/great-grandparents were born and permanently resident in India as defined in GoI Act, 1935 and other territories that became part of India thereafter provided neither was at any time a citizen of any of the aforesaid countries OR
    • is a spouse of a citizen of India or a PIO.

    (C) Overseas Citizenship of India (OCI)

    • After multiple efforts by leaders across the Indian political spectrum, a pseudo-citizenship scheme was established, the “Overseas Citizenship of India”, commonly referred to as the OCI card.
    • The Constitution of India does not permit full dual citizenship.
    • The OCI card is effectively a long-term visa, with restrictions on voting rights and government jobs.

     

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  • What is Liquid Nano Urea?

    During his visit to Gujarat, Prime Minister inaugurated the country’s first liquid nano urea plant at Kalol.

    Liquid Nano Urea (LNU)

    • Urea is chemical nitrogen fertiliser, white in colour, which artificially provides nitrogen, a major nutrient required by plants.
    • LNU is essentially urea in the form of a nanoparticle.
    • It is sprayed directly on the leaves and gets absorbed by the plant.
    • Fertilisers in nano form provide a targeted supply of nutrients to crops, as they are absorbed by the stomata, pores found on the epidermis of leaves.
    • According to IFFCO, liquid nano urea contains 4 per cent total nitrogen (w/v) evenly dispersed in water.
    • The size of a nano nitrogen particle varies from 20-50 nm. (A nanometre is equal to a billionth of a metre.)

    Significance of LNU

    • This patented product is expected to not only substitute imported urea, but to also produce better results in farms.
    • Apart from reducing the country’s subsidy bill, it is aimed at reducing the unbalanced and indiscriminate use of conventional urea.
    • It will help increase crop productivity, and reduce soil, water, and air pollution.

    Using LNU

    • The liquid nano urea produced by Indian Farmers Fertiliser Cooperative (IFFCO) Limited comes in a half-litre bottle priced at Rs 240, and carries no burden of subsidy currently.
    • By contrast, a farmer pays around Rs 300 for a 50-kg bag of heavily subsidised urea.
    • According to IFFCO, a bottle of the nano urea can effectively replace at least one bag of urea.

    How efficient is LNU?

    • While conventional urea has an efficiency of about 25 per cent, the efficiency of liquid nano urea can be as high as 85-90 per cent.
    • Conventional urea fails to have the desired impact on crops as it is often applied incorrectly, and the nitrogen in it is vaporized or lost as a gas.
    • A lot of nitrogen is also washed away during irrigation.
    • Liquid nano urea has a shelf life of a year, and farmers need not be worried about “caking” when it comes in contact with moisture.

     

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  • Astra MK-I Air-to-Air Missile: Features, strategic significance

    The Ministry of Defence has signed a contract with Bharat Dynamics Ltd (BDL) for the supply of the Astra Mark-1for deployment on fighter jets of the Indian Air Force and Indian Navy.

    Astra Missile

    • The Astra Mk-1 is a beyond visual range (BVR), air-to-air missile (AAM).
    • The Astra project was officially launched in the early 2000s with defined parameters and proposed future variants.
    • The missile has been designed and developed by the Defence Research and Development Organisation (DRDO).
    • It will be deployed on fighter jets like Sukhoi-30 MKI and Tejas of the IAF and the Mig-29K of the Navy.
    • BVM missiles are capable of engaging beyond the range of 20 nautical miles or 37 kilometres.

    Range and its Variants

    • While the range for Astra Mk-1 is around 110 km, the Mk-2 with a range over 150 km is under development and Mk-3 version with a longer range is being envisaged.
    • One more version of Astra, with a range smaller than Mk-1 is also under development.

    Strategic significance

    • The missile has been designed based on requirements specified by the IAF for BVR as well as close-combat engagement, reducing the dependency on foreign sources.
    • AAMs with BVR capability provides large stand-off ranges to own fighter aircraft.
    • It can neutralise adversary airborne assets without exposing adversary air defence measures.
    • Stand-off range means the missile is launched at a distance sufficient to allow the attacking side to evade defensive fire from the target.
    • Astra is technologically and economically superior to many such imported missile
    • The missile can travel at speeds more than four times that of sound and can reach a maximum altitude of 20 km, making it extremely flexible for air combat.

     

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  • India Bangladesh Relations

    Two years after they were stopped due to the onset of the pandemic, passenger train services between India and Bangladesh resumed with the Bandhan Express setting off from Kolkata for Khulna and the Maitree Express starting its run from Dhaka for Kolkata.

    History of Rail Connectivity

    • The Bandhan Express was resumed by rebooting a long-forgotten rail link between Kolkata and the industrial hub of Khulna, the third-largest city of Bangladesh.
    • In 1965, this route was served by the Barisal Express, which was stopped due to the India-Pakistan war.
    • The Modi government along with the Sheikh Hasina regime restarted that with Bandhan in 2017.
    • The Bandhan Express was the second train to be flagged off after the introduction of Maitree Express between Kolkata and Dhaka Cantonment in April, 2008.
    • It covers the distance between Kolkata and Khulna via Petrapole and Benapole border route to cater to the demands of the people from both the countries.
    • The Bandhan Express was resumed in 2017 by rebooting a long-forgotten rail link between Kolkata and the industrial hub of Khulna.

    Beyond passenger travel

    • The governments of both the countries have been working towards strengthening the rail link between them, and not just through passenger trains.
    • In August 2021, the two sides started regular movement of freight trains between the newly-restored link between Haldibari in India and Chilahati in Bangladesh.
    • The Haldibari-Chilahati rail link between India and the then East Pakistan was also operational till 1965 and stopped due to the war.
    • This was part of the broad gauge main route from Kolkata to Siliguri at the time of Partition.
    • The two sides envisage at least 20 freight trains to cross the border per month on this link.

    Rail infrastructure

    • Once part of a single, seamless railway network under British rule, trains continued to pass between the two countries even after the Partition.
    • The infrastructure to connect the two sides through railways was, therefore, largely present.
    • Policymakers on both sides viewed this as an opportunity to deepen diplomatic ties using cross-border movements of goods and passengers.
    • Five rail links have so far been rebooted between India and Bangladesh:

    Petrapole (India)-Benapole (Bangladesh), Gede (India)- Darshana (Bangladesh), Singhabad (India)-Rohanpur (Bangladesh), Radhikapur (India)-Birol (Bangladesh) and the Haldibari-Chilahati link

     

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  • Monsoon sets in over Kerala

    The monsoon has reached Kerala, the India Meteorological Department (IMD).

    What does the “Onset of Monsoon” mean?

    • The onset of the monsoon over Kerala marks the beginning of the four-month — June-September — southwest monsoon season over India.
    • It brings more than 70 per cent of the country’s annual rainfall. This marks a significant day in India’s economic calendar.
    • IMD announces it only after certain newly defined and measurable parameters, adopted in 2016, are met.
    • Broadly, the IMD checks for the consistency of rainfall over a defined geography, its intensity, and wind speed.

    (1) Rainfall

    • The IMD declares the onset of the monsoon if at least 60% of 14 designated meteorological stations in Kerala and Lakshadweep.
    • The 14 enlisted stations are: Minicoy, Amini, Thiruvananthapuram, Punalur, Kollam, Alappuzha, Kottayam, Kochi, Thrissur, Kozhikode, Thalassery, Kannur, Kasaragod, and Mangaluru.
    • It records at least 2.5 mm of rain for two consecutive days at any time after May 10.
    • In such a situation, the onset over Kerala is declared on the second day, provided specific wind and temperature criteria are also fulfilled.

    (2) Wind field

    • The depth of westerlies should be up to 600 hectopascal (1 hPa is equal to 1 millibar of pressure) in the area bound by the equator to 10ºN latitude, and from longitude 55ºE to 80ºE.
    • The zonal wind speed over the area bound by 5-10ºN latitude and 70-80ºE longitude should be of the order of 15-20 knots (28-37 kph) at 925 hPa.

    (3) Heat

    • According to IMD, the INSAT-derived Outgoing Longwave Radiation (OLR) value (a measure of the energy emitted to space by the Earth’s surface, oceans, and atmosphere) should be below 200 watt per sq m (wm2).
    • This is measured in the box confined by 5-10ºN latitude and 70-75ºE latitude.

    Is it unusual for the monsoon to hit the Kerala coast early?

    • Neither early nor late onset of the monsoon is unusual.
    • In 2018 and 2017, the onset over Kerala occurred on May 29 and May 30, respectively.
    • In 2010, onset was realised on May 31.
    • In 2020 and 2013, the monsoon was exactly on time, hitting the Kerala coast on June 1.

    Does an early onset foretell a good monsoon?

    • No, it does not — just as a delay does not foretell a poor monsoon.
    • The onset is just an event that happens during the progress of the monsoon over the Indian subcontinent.
    • A delay of a few days, or perhaps the monsoon arriving a few days early, has no bearing on the quality or amount of rainfall.

    How does the monsoon spread across the country after hitting Kerala coast?

    • The northward progression of the monsoon after it has hit the Kerala coast depends on a lot of local factors, including the creation of low pressure areas.
    • Though this year monsoon has arrived early, it is possible that despite a late onset over Kerala, other parts of the country start getting rain on time.
    • After its onset over Kerala, the monsoon spreads over the entire country by July 15.

    Back2Basics:

    Various terms related to Indian Monsoon

     

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  • What is the West Nile Virus?

    The Kerala health department is on alert after the death occurred due to the West Nile Virus.

    West Nile Virus

    • The West Nile Virus is a mosquito-borne, single-stranded RNA virus.
    • According to the WHO, it is a member of the flavivirus genus and belongs to the Japanese Encephalitis antigenic complex of the family Flaviviridae.

    How does it spread?

    • Culex species of mosquitoes act as the principal vectors for transmission.
    • It is transmitted by infected mosquitoes between and among humans and animals, including birds, which are the reservoir host of the virus.
    • Mosquitoes become infected when they feed on infected birds, which circulate the virus in their blood for a few days.
    • The virus eventually gets into the mosquito’s salivary glands.
    • During later blood meals (when mosquitoes bite), the virus may be injected into humans and animals, where it can multiply and possibly cause illness.
    • WNV can also spread through blood transfusion, from an infected mother to her child, or through exposure to the virus in laboratories.
    • It is not known to spread by contact with infected humans or animals.

    Symptoms of WNV infection

    • The disease is asymptomatic in 80% of the infected people.
    • The rest develop what is called the West Nile fever or severe West Nile disease.
    • In these 20% cases, the symptoms include fever, headache, fatigue, body aches, nausea, rash, and swollen glands.
    • Severe infection can lead to encephalitis, meningitis, paralysis, and even death.
    • It is estimated that approximately 1 in 150 persons infected with the West Nile Virus will develop a more severe form of the disease.
    • Recovery from severe illness might take several weeks or months.
    • It usually turns fatal in persons with co-morbidities and immuno-compromised persons (such as transplant patients).

     

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  • Booker Prize awarded to first Indian language book

    Author Geetanjali Shree’s translated Hindi novel, Tomb of Sand, became the first Indian language book to win the International Booker Prize.

    Note: Such topics hold very little relevance for CSE prelims. However, last year experience make such topics more uncertain. Still such topics hold relevance for other exams such as CAPF and state PSCs.

    What is the Booker Prize?

    • The Booker Prize is one of the best-known literary awards for fiction writing in English, including both novels and collections of short stories.
    • It was first awarded in 1969.
    • Every year a panel of judges decides the best work of the year, with the criteria being that it must be written in English and published in the UK and Ireland.
    • This panel of judges is picked from among eminent cultural historians, writers, professors, and novelists, and others from related fields.
    • For the Booker Prize, the winner receives £50,000.

    About the book

    • The 2018 novel titled ‘Ret Samadhi’ was translated by Daisy Rockwell and published as ‘Tomb of Sand’ in 2021.
    • The prize is one of two literary awards given out annually by the Booker Prize Foundation, a charity whose stated aim is to “promote the art and value of literature for the public benefit”.

    What about the International Booker Prize?

    • The International Booker Prize began in 2005.
    • A biennial prize initially, it was then awarded for a body of work available in English, including translations, with Alice Munro, Lydia Davis and Philip Roth becoming some of the early winners.
    • In 2015, the rules of the International prize changed to make it an annual affair.
    • The new rules stipulated that it will be awarded annually for a single book, written in another language and translated into English.
    • The £50,000 prize money is divided equally between the author and translator each year.

    Why is it called the ‘Booker’?

    • The Booker Prize, from 1969 to 2001, was named simply after the Booker Group Limited – a British food wholesale operator that was its initial sponsor.
    • The Man Group, an investment management firm based in the UK, began to sponsor the prize in 2002 and it thus came to be known as The Man Booker Prize.
    • The Man Group ended their sponsorship in 2019.
    • Crankstart, an American charitable foundation, has been the sponsor after that. The prize name has changed back to the ‘Booker’ since then.

    Who have been some prominent winners?

    • Prominent winners of the coveted prize include Margaret Atwood (‘The Testaments’), Yann Martel (‘Life of Pi’), and Julian Barnes (‘The Sense of an Ending’).
    • Many Indian-origin writers have won the Booker in the past, such as Arundhati Roy (‘The God of Small Things’), Salman Rushdie (‘Midnight’s Children’), Kiran Desai (‘The Inheritance of Loss’), and Aravind Adiga (‘The White Tiger’).
    • Shree is the first Indian to win an international prize.

     

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  • AKRUTI Program to start in Kudankulam

    The Nuclear Power Corporation of India Limited is all set to launch AKRUTI programme in the villages surrounding Kudankulam Nuclear Power Project (KKNPP).

    AKRUTI Program

    • The Nuclear Power Corporation of India Limited is assisting unemployed youth living near the Tarapur Atomic Power Station (TAPS) through AKRUTI.
    • AKRUTI stands for Advanced Knowledge and Rural Technology Implementation (AKRUTI) program.
    • Areas of water, food processing, agriculture and waste management in rural areas are covered under the AKRUTI program.
    • The scheme aims at empowering villages through implementing different technologies for usage.
    • This scheme will lead to sustainable growth of the rural sector across the country.

    What is the objective?

    • To provide information and mechanism for implementation of BARC technologies in rural areas thereby aiming at overall rural development.

     

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  • Monkeypox Virus: Origins and Outbreaks

    With cases being reported from across the world, monkeypox has caught everyone’s attention.

    What is Monkeypox?

    • Monkeypox is not a new virus.
    • The virus, belonging to the poxvirus family of viruses, was first identified in monkeys way back in 1958, and therefore the name.
    • The first human case was described in 1970 from the Democratic Republic of Congo.
    • Many sporadic outbreaks of animal to human as well as human to human transmission has occurred in Central and West Africa in the past with significant mortality.
    • After the elimination of smallpox, monkeypox has become one of the dominant poxviruses in humans, with cases increasing over years along with a consequent reduction in the age-group affected.

    How is it transmitted?

    • Since the transmission occurs only with close contact, the outbreaks have been in many cases self-limiting.
    • Since in the majority of affected people, the incubation period ranges from five to 21 days and is often mild or self-limiting, asymptomatic cases could transmit the disease unknowingly.
    • The outbreaks in Central Africa are thought to have been contributed by close contact with animals in regions adjoining forests.
    • While monkeys are possibly only incidental hosts, the reservoir is not known.
    • It is believed that rodents and non-human primates could be potential reservoirs.

    Does the virus mutate?

    • Monkeypox virus is a DNA virus with a quite large genome of around 2,00,000 nucleotide bases.
    • While being a DNA virus, the rate of mutations in the monkeypox virus is significantly lower (~1-2 mutations per year) compared to RNA viruses like SARS-CoV-2.
    • The low rate of mutation therefore limits the wide application of genomic surveillance in providing detailed clues to the networks of transmission for monkeypox.
    • A number of genome sequences in recent years from Africa and across the world suggest that there are two distinct clades of the virus — the Congo Basin/Central African clade and the West African clade.
    • Each of the clades further have many lineages.

    What do the genomes say?

    • With over a dozen genome sequences of monkeypox, it is reassuring that the sequences are quite identical to each other suggesting that only a few introductions resulted in the present spread of cases.
    • Additionally, almost all genomes have come from the West African clade, which has much lesser fatality compared to the Central African one.
    • This also roughly corroborates with the epidemiological understanding that major congregations in the recent past contributed to the widespread transmission across different countries.

    Does it have an effective vaccine?

    • It is reassuring that we know quite a lot more about the virus and its transmission patterns.
    • We also have effective ways of preventing the spread, including a vaccine.
    • Smallpox/vaccinia vaccine provides protection.
    • While the vaccine has been discontinued in 1980 following the eradication of smallpox, emergency stockpiles of the vaccines are maintained by many countries.
    • Younger individuals are unlikely to have received the vaccine and are therefore potentially susceptible to monkeypox which could partly explain its emergence in younger individuals.

     

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