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GS Paper: GS3-17.Awareness in the fields of IT, Space, Computers, Robotics, Nano-technology, Bio-technology and issues relating to Intellectual Property Rights.

  • [pib] High Electron Mobility Transistor (HEMT)

    Indian Scientists from Bangalore have developed a highly reliable, High Electron Mobility Transistor (HEMTs) that is normally OFF the device and can switch currents up to 4A and operates at 600V.

    We cannot deny the possibility of a complex S&T based prelims question. This newscard seems very technical. However many of you might be aware of the p-n junction diodes and conventional transistors.

    What is HEMT?

    • A high electron mobility transistor or HEMT is a type of field-effect transistor (FET) that is used to produce a high performance at microwave frequencies.
    • The HEMT provides a fusion of low noise figure that comes combined with the unique ability to function at very high microwave frequencies.
    • These devices are commonly used in aspects of radiofrequency designs that require high performance at high-frequency levels.
    • They produce a high gain, which makes these transistors very useful as amplifiers. They can switch speeds very rapidly.
    • And finally, they produce very low noise values as the current variations in these transistors are comparatively low.

    Practical applications of HEMT

    • HEMTs are used in applications where microwave millimetre wave communications are conducted.
    • They are also used for radar, imaging, as well as radio astronomy.
    • They are also used in voltage converter applications.
    • These transistors are also ideal as digital on-off switches in integrated circuits, and to be used as amplifiers for huge amounts of current by using a small voltage as a control signal.

    What is the news?

    First-ever indigenous HEMT

    • This first-ever indigenous HEMT device made from gallium nitride (GaN) is useful in electric cars, locomotives, power transmission and other areas requiring high voltage and high-frequency switching.
    • It would reduce the cost of importing such stable and efficient transistors required in power electronics.

    How does it work?

    • Power electronic systems demand high blocking voltage in OFF-state and high current in ON-state for efficient switching performance.
    • Specific transistors called HEMTs made of aluminium gallium nitride/ gallium nitride (AlGaN/GaN) provides an edge over silicon-based transistors as they allow the systems to operate at very high voltages, switch ON and OFF faster, and occupy less space.
    • Commercially available AlGaN/GaN HEMTs use techniques to keep the transistor in a normally OFF state, which affects the stability, performance and reliability of the device.
    • Therefore, to meet this need, researchers have developed a new kind of HEMT, which is in the OFF state by default and works like any other commonly used power transistor.

  • Responsible and ethical AI

    The article highlights the challenges and opportunities offered by the Artificial Intelligence and suggests the ways to deal with them.

    AI as a part of our life

    • AI is embedded in the recommendations we get on our favourite streaming or shopping site; in GPS mapping technology; in the predictive text that completes our sentences when we try to send an email or complete a web search.
    • And the more we use AI, the more data we generate, the smarter it gets.
    • In just the last decade, AI has evolved with unprecedented velocity.

    How AI could help us

    • AI has helped increase crop yields, raised business productivity, improved access to credit and made cancer detection faster and more precise.
    • It could contribute more than $15 trillion to the world economy by 2030, adding 14% to global GDP.
    • Google has identified over 2,600 use cases of “AI for good” worldwide.
    • A study published in Nature reviewing the impact of AI on the Sustainable Development Goals (SDGs) finds that AI may act as an enabler on 134 of all SDG targets.

    Concerns with AI

    • Yet, the study in Nature also finds that AI can actively hinder 59 — or 35% — of SDG targets.
    • AI requires massive computational capacity, which means more power-hungry data centres — and a big carbon footprint.
    • AI could compound digital exclusion.
    • Many desk jobs will be edged out by AI, such as accountants, financial traders and middle managers.
    • Without clear policies on reskilling workers, the promise of new opportunities will in fact create serious new inequalities.
    • Investment is likely to shift to countries where AI-related work is already established widening gaps among and within countries.
    • AI also presents serious data privacy concerns. 
    • We shape the algorithms and it is our data AI operate on.
    • In 2016, it took less than a day for Microsoft’s Twitter chatbot, “Tay”, to start spewing egregious racist content, based on the material it encountered.

    Way forward

    • Without ethical guard rails, AI will widen social and economic schisms, amplifying any innate biases.
    • Only a “whole of society” approach to AI governance will enable us to develop broad-based ethical principles, cultures and codes of conduct.
    • Given the global reach of AI, such a “whole of society” approach must rest on a “whole of world” approach.
    • The UN Secretary-General’s Roadmap on Digital Cooperation is a good starting point.
    • This approach lays out the need for multi-stakeholder efforts on global cooperation.
    • UNESCO has developed a global, comprehensive standard-setting draft Recommendation on the Ethics of Artificial Intelligence to Member States for deliberation and adoption.
    • Many countries, including India, are cognisant of the opportunities and the risks, and are striving to strike the right balance between AI promotion and AI governance.
    • NITI Aayog’s Responsible AI for All strategy, the culmination of a year-long consultative process, is a case in point.

    Consider the question “What are the ways in which Artificial Intelligence in helping humanity? What are the concerns with the promotion and the governance of AI?”

    Conclusion

    Chellenging part starts where principles meet reality that the ethical issues and conundrums arise in practice, and for which we must be prepared for deep, difficult, multi-stakeholder ethical reflection, analyses and resolve. Only then will AI provide humanity its full promise.

  • Martian ‘Blueberries’

    In 2004, NASA’s Mars exploration rover ‘Opportunity’ found several small spheres on the planet, informally named Martian blueberries which find a resemblance to the similar formation in India’s Kutch region.

    There have been several missions to the red planet this year. Make a note of all of them.

    Martian blueberries

    • Opportunity’s mini spectrometers studied mineralogy and noted they were made of iron oxide compounds called haematites.
    • This caused excitement, as the presence of haematites suggests that there was water present on Mars.
    • The widely accepted formation mechanism of hematite concretion [hard solid mass] is precipitation from aqueous fluids.
    • Hematite is known to form in oxidizing environments hence it can be inferred that water must have played a crucial role in the formation of grey hematite on Mars.

    What makes them so special?

    • Indian researchers have been studying hematite concretions in Kutch called the Jhuran formation.
    • These formations are 145 and 201 million years old.
    • Detailed geochemistry and spectroscopic investigations of the haematite concretions in this area revealed that they resemble the ones on Mars.
    • They have similar morphology – spherical, often doublet and triplet – and similar mineralogy – a mixture of haematite and goethite.
    • Hence, several types of research have shown that the Kutch area is a potential Martian analogue locality.

  • Genetics of Eye Color

    Researchers from London have found that eye colour in Asians with different shades of brown is genetically similar to eye colour in Europeans ranging from dark brown to light blue.

    Human Eye Colour

    • Human eye colour ranges from black, brown to blue, green, and even red.
    • Eye colour is primarily determined by melanin abundance within the iris pigment epithelium, which is greater in brown than in blue eyes.
    • There are two forms of melanin – eumelanin and pheomelanin – and the ratio of the two within the iris as well as light absorption and scattering by extracellular components are additional factors that give irises their colour.
    • Absolute melanin quantity and the eumelanin–pheomelanin ratio is higher in brown irises, while blue or green irises have very little of both pigments and relatively more pheomelanin.

    Try this PYQ:

    Q.Recently, LASIK (Lasser Assisted In Situ Keratomileusis) procedure is being made popular for vision correction. Which one of the following statements in this context is not correct?

    (a) LASIK procedure is used to correct refractive errors of the eye

    (b) It is a procedure that permanently changes the shapes of the cornea

    (c) It reduces a person’s dependence on glasses or contact lenses

    (d) It is a procedure that can be done on the person of any age

    What has the research found?

    • Previously a dozen genes (mainly HERC2 and OCA2) were found to influence eye colour.
    • The researchers have now identified 50 new genes for eye colour.
    • Genetic analysis of nearly 0.2 million people across Europe and Asia helped the researchers to identify the new genes.
    • The findings collectively explain over 53% of eye colour variation using common single-nucleotide polymorphisms.

    Outcome of the research

    • Overall, the study outcomes demonstrate that the genetic complexity of human eye colour considerably exceeds previous knowledge and expectations.
    • These findings will help improve our understanding of eye diseases such as pigmentary glaucoma and ocular albinism where pigment levels play a role.

  • 2001 FO32: the largest asteroid passing by Earth

    On March 21, the largest asteroid predicted to pass by Earth in 2021 will be at its closest. It is called 2001 FO32.

    Try this PYQ:

    Q.Which of the following is/are cited by the scientists as evidence/evidence for the continued expansion of the universe?

    1. Detection of microwaves in space
    2. Observation of redshirt phenomenon in space
    3. Movement of asteroids in space
    4. Occurrence of supernova explosions in space

    Codes:

    (a) 1 and 2 only

    (b) 2 only

    (c) 1, 3 and 4

    (d) None of the above can be cited as evidence.

    2001 FO32

    • There is no threat of a collision with our planet now or for centuries to come.
    • Scientists know its orbital path around the Sun very accurately since it was discovered 20 years ago and has been tracked ever since.
    • It won’t come closer than 2 million km to Earth, but it will present a valuable scientific opportunity for astronomers who can get a good look at a rocky relic that formed at the dawn of our Solar System.

    Proximity to Earth

    • For comparison, when it is at its closest, the distance of 2 million km is equal to 5¼ times the distance from Earth to the Moon.
    • Still, that distance is close in astronomical terms, which is why 2001 FO32 has been designated a “potentially hazardous asteroid”.
    • The reason for the asteroid’s unusually speedy close approach is its highly eccentric orbit around the Sun, an orbit that is tilted 39° to Earth’s orbital plane.
    • This orbit takes the asteroid closer to the Sun than Mercury, and twice as far from the Sun as Mars.
    • Later, the asteroid slows after being flung back out into deep space and swinging back toward the Sun. It completes one orbit every 810 days (about 2¼ years).

    Studying the visitor

    • This asteroid will provide an opportunity for astronomers to get a more precise understanding of the asteroid’s size and albedo (i.e. how bright, or reflective, its surface is), and a rough idea of its composition.
    • When sunlight hits an asteroid’s surface, minerals in the rock absorb some wavelengths while reflecting others.
    • By studying the spectrum of light reflecting off the surface, astronomers can measure the chemical “fingerprints” of the minerals on the surface of the asteroid.

  • Genome Mapping of the Indian Ocean

    A team of scientists and researchers from the National Institute of Oceanography (NIO) onboard its research vessel Sindhu Sadhana will work on a research project to reveal the internal working of the body of the ocean at a cellular level.

    Genome Mapping of the Indian Ocean

    • The first-of-its-kind research project in the country is aimed at understanding the biochemistry and the response of the ocean to climate change, nutrient stress and increasing pollution.
    • The researchers will collect samples from various stretches of the ocean at an average depth of about 5 km.
    • Just like gene mapping is carried out on blood samples collected from humans, the scientists will map these in the bacteria, microbes found in the ocean.
    • The mapping of the Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA) will show the nutrients present in them, and also those lacking in different parts of the ocean.

    Objectives of the mission

    • This project will help scientists understand the internal working of the ecosystem of the Indian Ocean.
    • The research will enable scientists to identify the factors controlling the changes in RNA, DNA in the oceans, and various stressors impacting them.
    • The ocean has several micronutrients like nitrates, sulphates and silicates, minerals like iron ore and zinc, and trace metals like cadmium or copper.
    • The genome mapping will show the presence of which these microbes have adapted to, in addition to their reaction to atmospheric carbon dioxide.
    • This will help in identifying which part of the ocean has a greater concentration of which mineral or element.
    • Scientists will then use these as tracers to tackle the causative factors for excess or lack of a certain mineral or element and suggest possible solutions for their mitigation.
    • In addition, the large pool of RNA, DNA library of the oceans will be utilized for using the Indian Ocean for human benefit in the future.

    Studying the interactions of trace metals

    • Trace metals are the metals subset of trace elements; that is, metals normally present in small but measurable amounts in animal and plant cells.
    • Trace metals like cadmium or copper are supplied to oceans via continental run-offs, atmospheric deposition, hydrothermal activities and continental shelf interaction.
    • They are essential for ocean productivity for having a holistic understanding of nutrient cycling and productivity of the oceans.
    • Isotopic forms of trace metals can be utilized to track the movement of water masses responsible for ocean circulation and as tools to study the biological, geochemical and ecosystem processes and food web analyses.

    Also read

    https://www.civilsdaily.com/news/explained-indias-deep-ocean-mission/

  • Lunar Polar Exploration (LUPEX) Mission

    India and Japan are working together on a joint lunar polar exploration (LUPEX) mission that aims to send a lander and rover to the Moon’s the South Pole around 2024.

    Try this PYQ from CSP 2020:

    Q.The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million km long, with lasers shining between the craft.” the experiment in the question refers to?

    (a) Voyager-2

    (b) New horizons

    (c) LISA pathfinder

    (d) Evolved LISA

    LUPEX Mission

    • The LUPEX is a robotic lunar mission concept by the Indian Space Research Organisation (ISRO) and Japan Aerospace Exploration Agency (JAXA).
    • It would send a lunar rover and lander to explore the South Pole region of the Moon in 2024.
    • JAXA is likely to provide the under-development H3 launch vehicle and the rover, while ISRO would be responsible for the lander.
    • The mission concept has not yet been formally proposed for funding and planning.
    • The Lunar Polar Exploration mission would demonstrate new surface exploration technologies related to vehicular transport and lunar night survival for sustainable lunar exploration in Polar Regions.

  • NASA-ISRO Synthetic Aperture Radar (NISAR)

    Indian Space Research Organisation (ISRO) has completed the development of a Synthetic Aperture Radar (SAR).

    Note the key features of the Mission. Every statement has a unique information.

    NASA-ISRO SAR

    • NISAR is a joint collaboration for a dual-frequency L and S-band SAR for earth observation.
    • NASA and Bengaluru-headquartered ISRO signed a partnership on September 30, 2014, to collaborate on and launch NISAR.
    • The mission is targeted to launch in early 2022 from ISRO’s Sriharikota spaceport in Andhra Pradesh’s Nellore district, about 100km north of Chennai.
    • It is capable of producing extremely high-resolution images for a joint earth observation satellite mission with NASA.
    • It will be the first satellite mission to use two different radar frequencies (L-band and S-band) to measure changes in our planet’s surface less than a centimetre across.

    Objectives of the NISAR

    • NISAR will observe Earth’s land and ice-covered surfaces globally with 12-day regularity on ascending and descending passes, sampling Earth on average every six days for a baseline three-year mission.
    • It will measure Earth’s changing ecosystems, dynamic surfaces and ice masses, providing information about biomass, natural hazards, sea-level rise and groundwater, and will support a host of other applications.
    • It would also provide data on natural hazards including earthquakes, tsunamis, volcanoes and landslides.

    What are L and S Bands?

    • L band waves are used for GPS units because they are able to penetrate clouds, fog, rain, storms, and vegetation.
    • The S-band is used by airport surveillance radar for air traffic control, weather radar, surface ship radar, and some communications satellites, especially those used by NASA to communicate with the Space Shuttle and the International Space Station.
    • NISAR uses a sophisticated information-processing technique known as SAR to produce extremely high-resolution images.
    • Radar penetrates clouds and darkness, enabling NISAR to collect data day and night in any weather.

    What is collaboration?

    • NASA is providing the mission’s L-band SAR, a high-rate communication subsystem for science data, GPS receivers, a solid-state recorder and payload data subsystem.
    • ISRO is providing the spacecraft bus, the S-band radar, the launch vehicle and associated launch services for the mission, whose goal is to make global measurements of the causes and consequences of land surface changes using advanced radar imaging.

  • What are Quasars?

    An international team of astronomers have discovered the most distant ‘radio-loud’ quasar with the help of the European Southern Observatory’s Very Large Telescope (ESO’s VLT).

    Ever found this on YouTube? Take time to watch this amazing video. It will literally blow up your mind and curiosity!

     

    TIMELAPSE OF THE FUTURE: A Journey to the End of Time (4K)

     

    This video will make up your perceptions and conceptions of how a galaxy dies after the sun runs out of fuel and what a black hole actually is!

    What are Quasars?

    • A quasar known as a quasi-stellar object is an extremely luminous active galactic nucleus (AGN), in which a supermassive black hole with mass ranging from millions to billions of times the mass of the Sun is surrounded by a gaseous accretion disk.
    • As gas in the disk falls towards the black hole, energy is released in the form of electromagnetic radiation, which can be observed across the electromagnetic spectrum.
    • The power radiated by quasars is enormous; the most powerful quasars have luminosities thousands of times greater than a galaxy such as the Milky Way.
    • Most active galaxies have a supermassive black hole at the centre which sucks in surrounding objects.
    • Quasars are formed by the energy emitted by materials spiralling around a black hole right before being sucked into it.

    What makes this event special?

    • 90 per cent of quasars do not emit strong radio waves, making this newly-discovered one special.
    • It took 13 billion years for the quasar’s light to reach earth.
    • Named P172+18, the quasar emitted wavelengths had a redshift of 6.8.
    • Only three other ‘radio-loud’ sources with a redshift greater than six have been discovered so far and the most distant one had a redshift of 6.18.
    • The higher the redshift of the radio wavelength, the farther away is the source.

    As an object moves away from us, the sound or light waves emitted by the object are stretched out, which makes them have a lower pitch and moves them towards the red end of the electromagnetic spectrum, where light has a longer wavelength. In the case of light waves, this is called redshift.

  • Technology and Innovation Report, 2021

    According to UNCTAD’s Technology and Innovation Report 2021, India is the greatest outperformer among developing countries to use, adopt and adapt frontier technologies than their per capita GDPs.

    Q.What do you mean by Frontier technologies? Discuss their potential for path-breaking technological change that will profoundly affect markets and societies. (250W)

    Technology and Innovation Report, 2021

    • The report critically examines the possibility of frontier technologies such as AI, robotics, and gene-editing widening existing inequalities and creating new ones.

    What are Frontier technologies?

    • Frontier technologies include AI, IoT, big data, blockchain, fifth-generation mobile telephony, 3D printing, robotics, drones, gene-editing, nanotechnology, and solar power — the ones that take advantage of digitalization and connectivity.
    • Frontier technologies are essential for sustainable development, but they also could accentuate initial inequalities.

    Country-Readiness Index

    • The country-readiness index released by the United Nations Conference on Trade and Development (UNCTAD) under this report.
    • The index analyzed the progress of countries in using frontier technologies, considering their national capacities related to physical investment, human capital, and technological effort.

    India’s performance

    • India’s actual index ranking was 43, while the estimated one based on per capita income was 108.
    • This meant that India overperformed other countries by 65 ranking positions.
    • It was followed by the Philippines, which overperformed by 57 ranking positions.

    Global performance

    • China was at position 25; both India and China performed well in research and development.
    • This was reflective of their abundant supplies of qualified and highly skilled human resources available at a comparatively low cost.
    • The Philippines has a high ranking for the industry—because of high levels of foreign direct investment in high-technology manufacturing, especially electronics.
    • The United States, Switzerland, and the United Kingdom were “best prepared” for frontier technologies, the report highlighted.
    • Most of the best-prepared countries are from Europe, except the Republic of Korea, Singapore, and the United States. Some transition economies, such as Russia, also perform well on the index.

    Major takeaways of the report

    The report urges all developing nations to prepare for a period of deep and rapid technological change that will profoundly affect markets and societies.

    • Developing countries should align science, technology, and innovation policies with industrial policies.
    • New technologies can re-invigorate traditional production sectors and speed up industrialization and economic structural transformation.
    • It is up to policymakers to reduce this risk and make frontier technologies contribute to increasing equality, says the report.
    • Low-and middle-income developing countries and the least developing countries cannot afford to miss the new wave of rapid technological change.