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Subject: Science and Technology

  • Giant Metrewave Radio Telescope (GMRT)

    The Giant Metrewave Radio Telescope (GMRT) has been selected as a ‘Milestone’ facility by the U.S.-based Institute of Electrical and Electronics Engineers (IEEE).

    Note: GMRT is not an ISRO mission.

    About GMRT

    • The GMRT located near Pune is an array of thirty fully steerable parabolic radio telescopes of 45-metre diameter, observing at metre wavelengths.
    • It is operated by the National Centre for Radio Astrophysics (NCRA), a part of the Tata Institute of Fundamental Research, Mumbai.
    • It was conceived and built under the direction of Late Prof. Govind Swarup from 1984 to 1996.
    • At the time it was built, it was the world’s largest interferometric array offering a baseline of up to 25 kilometres (16 mi).
    • Astronomers from all over the world regularly use this telescope to observe many different astronomical objects such as HII regions (interstellar atomic hydrogen that is ionized), galaxies, pulsars, supernovae, and Sun and solar winds.

    A significant feat

    • IEEE is the world’s largest technical professional organisation dedicated to advancing technology in all areas related to electrical and electronics engineering.
    • The IEEE Milestones programme honours significant technical achievements which have a global or regional impact. This is only the third such IEEE ‘Milestone’ recognition for an Indian contribution.
    • The previous two Indian IEEE Milestones were for the pioneering work done by Sir J.C. Bose to demonstrate the generation and reception of radio waves in 1895 (recognised in 2012), and for the Nobel Prize-winning (in 1930) ‘scattering of light’ phenomenon observed by Sir C.V. Raman in 1928.

  • Chang’e-5 Lunar Probe

    China is preparing to launch an unmanned spacecraft to bring back lunar rocks, the first attempt by any nation to retrieve samples from the moon in four decades.

    Try this PYQ:

    Q.What do you understand by the term Aitken basin:

    (a) It is a desert in the southern Chile which is known to be the only location on earth where no rainfall takes place

    (b) It is an impact crater on the far side of the Moon

    (c) It is a Pacific coast basin, which is known to house large amounts of oil and gas

    (d) It is a deep hyper saline anoxic basin where no aquatic animals are found

    Chang’e-5 Probe

    • The Chang’e-5 probe, named after the mythical Chinese moon goddess, aims to shovel up lunar rocks and soil to help scientists learn about the moon’s origins, formation and volcanic activity on its surface.
    • The goal of the mission is to land in the Mons Rumker region of the moon, where it will operate for one lunar day, which is two weeks long.
    • It will collect 2 kg of surface material from a previously unexplored area known as Oceanus Procellarum — or “Ocean of Storms” — which consist of vast lava plain.
    • The original mission, planned for 2017, was delayed due to an engine failure in China’s Long March 5 launch rocket.
    • If successful, China will be only the third country to have retrieved samples from the moon, following the U.S. and the Soviet Union in the 1960s and 1970s.

    Significance of the mission

    • As per the Lunar and Planetary Institute, rocks found on the Moon are older than any that have been found on Earth and therefore they are valuable in providing information about the Earth and the Moon’s shared history.
    • Lunar samples can help to unravel some important questions in lunar science and astronomy, including the Moon’s age, its formation, the similarities and differences between the Earth and the Moon’s geologic features.
    • For instance, the shape, size, arrangement and composition of individual grains and crystals in a rock can tell scientists about its history, while the radioactive clock can tell them the rock’s age.
    • Further, tiny cracks in rocks can tell them about the radiation history of the Sun in the last 100,000 years.

  • [pib]  Person in news: Guru Teg Bahadur

    The President of India’s has delivered a special message on the eve of ‘Martyrdom Day’ of Guru Teg Bahadur.

    Try this PYQ:

    Q.Consider the following Bhakti Saints:

    1. Dadu Dayal
    2. Guru Nanak
    3. Tyagaraja

    Who among the above was/were preaching when the Lodi dynasty fell and Babur took over?

    (a) 1 and 3

    (b) 2 only

    (c) 2 and 3

    (d) 1 and 2

    Guru Teg Bahadur (1621-1675)

    • Guru Teg Bahadur was the ninth of ten Gurus of the Sikh religion.
    • One hundred and fifteen of his hymns are in Guru Granth Sahib.
    • He stood up for the rights of Kashmiri Pandits who approached him against the imposition jizya tax.
    • He was publicly killed in 1675 on the orders of Mughal emperor Aurangzeb in Delhi for refusing to convert.
    • In the words of Noel King of the University of California, “Guru Teg Bahadur’s martyrdom was the first-ever martyrdom for human rights in the world.
    • He is fondly remembered as ‘Hind di Chaadar’.

  • Brus’ resettlement in Tripura

    People erupted in violent protests against the planned resettlement of thousands of Bru migrants permanently at Kanchanpur sub-division of North Tripura.

    Try this PYQ:

     

    Q. With reference to ‘Changpa’ community of India, consider the following statement:

    1. They live mainly in the State of Uttarakhand.
    2. They rear the Pashmina goats that yield fine wool.
    3. They are kept in the category of Scheduled Tribes.

    Which of the statements given above is/are correct? (CSP 2014)

    (a) 1 only

    (b) 2 and 3 only

    (c) 3 only

    (d) 1, 2 and 3

    Who are the Brus?

    • Reangs or Brus are the second largest ethnic group in Mizoram.
    • Their exodus in 1997 was spurred by violent clashes in Mamith subdivision, a Reang-dominated area when they demanded the creation of an autonomous council that was vehemently opposed by Mizo groups.
    • Around 34,000 people were forced to live in sub-human conditions in tents in Tripura. No solution could be reached all these years.
    • These people were housed in temporary camps at Kanchanpur, in North Tripura.

    Why have there been violent protests?

    • Twenty-three years after ethnic clashes in Mizoram forced 37,000 people of the Bru (or Reang) community to flee their homes to neighbouring Tripura.
    • The news was not welcomed by the Bengali and Mizo communities in Tripura.
    • They fear a demographic imbalance, which would exert pressure on local resources and potentially lead to law and order problems.

    Also read

    [Burning Issue] Bru– Reang Repatriation Agreement

  • Sentinel-6 Satellite

    The Copernicus Sentinel-6 Michael Freilich satellite, designed to monitor oceans, was launched from the in California.

    Try this MCQ:

    The Jason Continuity of Service (Jason-CS) Mission recently seen in news is aimed at observing:

    (a)Microgravity changes

    (b)Sea level rise

    (c)Cosmic radiation

    (d)Space debris

    Sentinel-6 Satellite

    • This is a part of the next mission dedicated to measuring changes in the global sea level.
    • It has been named after Dr Michael Freilich, who was the Director of NASA’s Earth Science Division from 2006-2019 and passed away in August this year.

    What is the mission?

    • The mission, called the Jason Continuity of Service (Jason-CS) mission, is designed to measure the height of the ocean, which is a key component in understanding how the Earth’s climate is changing.
    • The spacecraft consists of two satellites, the other, called Sentinel-6B, to be launched in 2025.
    • It has been developed jointly by the European Space Agency (ESA), NASA, and France’s National Centre for Space Studies (CNES).

    What will the satellite do?

    • The satellite will ensure the continuity of sea-level observations into the fourth decade and will provide measurements of global sea-level rise.
    • Since 1992, high-precision satellite altimeters have helped scientists understand how the ocean stores and distributes heat, water and carbon in the climate system.
    • Essentially, the satellite will send pulses to the Earth’s surface and measure how long they take to return to it, which will help scientists measure the sea surface height.
    • It will also measure water vapour along this path and find its position using GPS and ground-based lasers.

    Significance of the mission

    • As per NASA, it is possible to observe the height of the oceans on a global scale and monitor critical changes in ocean currents and heat storage only from space.
    • Data from satellites such as Sentinel-6 help scientists foresee the effects of the changing oceans on the climate.
    • Further, in order to measure and track changes in the oceanic heat budget, scientists need to know the ocean currents and heat storage of the oceans, which can be determined from the height of the sea surface.

  • [pib] IRNSS now part of World Wide Radio Navigation System

    The Indian Regional Navigation Satellite System (IRNSS) has been accepted as a component of the World Wide Radio Navigation System (WWRNS) for operation in the Indian Ocean Region by the International Maritime Organization (IMO).

    Try this PYQ:

    With reference to the Indian Regional Navigation Satellite System (IRNSS), consider the following statements:

    1. IRNSS has three Satellites in geostationary and four satellites the geosynchronous orbits.
    2. IRNSS covers entire India and about 5500 sq. km beyond its borders.
    3. India will have its own satellite navigation system with full global coverage by the middle of 2019.

    Which of the statements given above is/are correct?

    (a) 1 only            

    (b) 1 and 2 only

    (c) 2 and 3 only

    (d) None

    What is IRNSS?

    • The IRNSS, with an operational name of NavIC (acronym for Navigation with Indian Constellation) is an Indian regional satellite navigation system that provides accurate real-time positioning and timing services.
    • It covers India and a region extending 1,500 km around it, with plans for further extension.
    • The system currently consists of a constellation of seven satellites, with two additional satellites on ground as stand-by.
    • The constellation is in orbit as of 2018, and the system was expected to be operational from early 2018 after a system check.
    • It will provide two levels of service, the “standard positioning service”, which will be open for civilian use, and a “restricted service” (an encrypted one) for authorised users (including the military).

    Benefits of the move

    • This move will enable merchant vessels to use IRNSS for obtaining position information similar to GPS and GLONASS.
    • This will assist in the navigation of ships in Indian ocean waters within the area covered by 50°N latitude, 55°E longitude, 5°S latitude and 110°E longitude (approximately up to 1500 km from Indian boundary).

    Back2Basics: International Maritime Organisation (IMO)

    • IMO is the UN specialized agency with responsibility for the safety and security of shipping and the prevention of marine pollution by ships.
    • Its primary purpose is to develop and maintain a comprehensive regulatory framework for shipping and its remit today includes safety, environmental concerns, legal matters, technical co-operation, maritime security and the efficiency of shipping.
    • IMO is governed by an assembly of members and is financially administered by a council of members elected from the assembly.

  • Community Cord Blood Banking

    Community Cord Blood Banking, a stem cell banking initiative, has recently helped save the life of a girl child making it India’s first dual cord blood transplant through an unrelated donor.

    Must read:

    What is Cord Blood Banking?

    • Community Banking is a new sharing economy model of stem cell banking that was pioneered by LifeCell in India.
    • Parents who choose to store their child’s cord blood in a community bank will have access, in the event of medical need, to all of the other cord blood units in the bank.
    • A community bank is like a public cord blood bank in that the members are supporting each other, but it is also like a private bank because the members pay for this service and outsiders cannot participate.
    • It can fill an unmet health need in a country like India, where there is no national network of public banks and the population has unique genetics that are not covered by banks elsewhere in the world.
    • It is different from “hybrid” banking where both public and family banks share a laboratory, because in hybrid banks the pubic and family sides operate separately.
    • In a community bank the public and family functions are blended.

    Benefits of cord blood

    • It gives protection to a baby against all conditions treatable using stem cells (own & donor).
    • It gives protection to the baby’s siblings, parents and grandparents (maternal & paternal) by providing unrelated donor stem cells.

    Back2Basics: Stem Cell Therapy

    • It is a type of treatment option that uses a patient’s own stem cells to repair damaged tissue and repair injuries.
    • It is used to treat more than 80 disorders including neuromuscular and degenerative disorders. Eg. Bone-marrow transplant is used in Leukemia (blood cancer), sickle-cell anemia, immunodeficiency disorders.
    • Stem cells are usually taken from one of the two areas in the patient’s body: bone marrow or adipose (fat) tissue in their upper thigh/abdomen.
    • Because it is common to remove stem cells from areas of stored body fat, some refer to stem cell therapy as “Adipose Stem Cell Therapy” in some cases.

  • Needed, a policy framework in step with technology

    The changing realm of technology requires a change in the policy framework. The article discusses the issue of the impact of technology and the required changes in the policy framework.

    Adoption of information-based technologies

    • The expansion of computing power has driven the pace of information gathering and analysis.
    • The new currency drives processes and decision-making across a wide array of products and services, making them more efficient and value accretive for consumers.
    • These information-based technologies have been widely adopted across a broad range of industries and products that traditionally have not been perceived as electronic or software based.
    •  A modern automobile has 40% of its component value from electronic-based products.
    • This is a paradigm shift as the amount of “value add” from intangible technology services as opposed to physical objects, even in traditional goods, is being transformed by information.
    • Information and electronics are becoming all-pervasive, ensuring that we set boundaries to control quality or the uptime of the equipment.
    • Information availability drives efficiency and creates value for customers by providing greater control over the product
    • There is increasing digitisation and electronification of industrial activities, products and services, influencing the evolving skill sets in industry.

    Need for holistic views in policies

    • To address the needs of various stakeholders, governments have tended to build specialised departments and designed policies that govern those areas.
    • Over time, as each of these departments grew, they have tended to operate in silos.
    • The recent developments in technology have, however, blurred standard boundaries that dictate policy framework in most governments.
    • As technology is driving an increasing share of the value add coming from digitisation and data analytics, there needs to be a way of encouraging capital formation by way of intangibles in traditionally tangible industries.
    • There is a need to have a holistic view of policies for economic development as technology is becoming a significant enabler in most industries.
    • A change in policy framework regarding economic development that enables various ministries to work together is essential.

    Way forward

    • A nourishing ecosystem for industry, including the hard infrastructure and softer areas such as education, skilling, technical institutions, laboratories, testing centres, etc., has to be cultivated.
    • The creation of clusters of companies in adjacent but complementary areas could constitute such an ecosystem that encourages multi and cross-disciplinary learning and spur innovation and economic development.
    • Moreover, this type of ecosphere could also attract investment and capital formation.
    • There is also the larger issue of a shift of value between manufacturing and services as technology changes.
    • The policy, by and large, promotes and gives incentives for manufacturing, whereas the share of intangibles are not adequately covered in industrial policies.
    • It is important to include these to encourage innovation and technological development.
    • It is important that there is close cooperation and alignment between the Centre and State to ensure effective implementation on the ground.

    Conclusion

    Some of these thoughts could help us navigate through an ecosystem that is changing with technology.

  • What is mRNA vaccine?

    The Moderna and Pfizer vaccines which recently announced their success use the same technology, based on messenger RNA, or mRNA.

    Try this PYQ first:

    Q.‘RNA interference (RNAi)’ technology has gained popularity in the last few years. Why?

    1. It is used in developing gene silencing therapies.
    2. It can be used in developing therapies for the treatment of cancer.
    3. It can be used to develop hormone replacement therapies.
    4. It can be used to produce crop plants that are resistant to viral pathogens.

    Select the correct answer using the code given below:

    (a) 1, 2 and 4

    (b) 2 and 3

    (c) 1 and 3

    (d) 1 and 4 only

    What is mRNA?

    • Messenger RNA (mRNA) is a single-stranded RNA (Ribo Nucleic Acid) molecule that is complementary to one of the DNA strands of a gene.
    • The mRNA is an RNA version of the gene that leaves the cell nucleus and moves to the cytoplasm where proteins are made.
    • During protein synthesis, an organelle called a ribosome moves along the mRNA, reads its base sequence, and uses the genetic code to translate each three-base triplet, or codon, into its corresponding amino acid.

    What is the mRNA vaccine?

    • Such vaccines make use of the messenger RNA molecules that tell the body’s cells what proteins to build.
    • The mRNA, in this case, is coded to tell the cells to recreate the spike protein of the coronavirus SARS-CoV-2, which causes Covid-19.
    • It is the spike protein — which appears as spikes on the surface of the coronavirus — that initiates the process of infection; it allows the virus to penetrate cells, after which it goes on to replicate.
    • A coronavirus vaccine based on mRNA, once injected into the body, will instruct the body’s cells to create copies of the spike protein.
    • In turn, this is expected to prompt the immune cells to create antibodies to fight it.
    • These antibodies will remain in the blood and fight the real virus if and when it infects the human body.

    Back2Basics: Ribo Nucleic Acid (RNA)

    • RNA is an important biological macromolecule that is present in all biological cells.
    • It is principally involved in the synthesis of proteins, carrying the messenger instructions from DNA, which itself contains the genetic instructions required for the development and maintenance of life.
    • In some viruses, RNA, rather than DNA, carries genetic information.
    • The type of RNA dictates the function that this molecule will have within the cell.
    • Aside from the coding region of messenger RNA (mRNA) molecules that will be translated into proteins, other cellular RNA elements are involved in different processes.

  • Leonid Meteor Shower

    The Leonid meteor showers are currently making their yearly appearance and will reach their peak in India on November 17 and 18.  In August this year, there was another meteor called Perseids Shower.

    Try this question from CSP 2014:

    Q.What is a coma, in the content of astronomy?

    (a) Bright half of material on the comet

    (b) Long tail of dust

    (c) Two asteroids orbiting each other

    (d) Two planets orbiting each other

    What is Leonid Meteor Shower?

    • Meteor showers are named after the constellation they appear to be coming from.
    • The Leonids originate from the constellation Leo the Lion– the groups of stars which form a lion’s mane.
    • They emerge from the comet Tempel-Tuttle, which requires 33 years to revolve once around the Sun.
    • These meteors are bright and among the fastest moving– travelling at speeds of 71 km per second.
    • During this year’s showers, peaks of around 10 to 15 meteors are expected to be seen every hour.
    • The Leonid showers include fireballs– bright and large meteors than can last longer than average meteors, and “earthgazers”– meteors which appear close to the horizon with colourful and long tails.

    What is a meteor shower?

    • On its journey around the Sun, the Earth passes through large swathes of cosmic debris.
    • The debris is essentially the remnants of comets — great frigid chunks of matter that leave behind dirty trails of rocks and ice that linger long after the comets themselves have passed.
    • As the Earth wades through this cloud of comet waste, the bits of debris create what appears from the ground to be a fireworks display in the sky — known as a meteor shower.
    • Several meteor showers can be seen around the year. According to NASA, over 30 meteor showers occur annually and are observable from the Earth.

    Back2Basics: