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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.

  • The Curie Family and its Nobel legacy

    This newscard is inspired by an article published in the DTE which talks about a family which has received a total of four Nobel prizes, the highest won by a single-family.

    Last year in 2019 CSP, there was a question on pure Biology about Hepatitis and its variants. With such news trending, we can expect a core chemistry or physics based question coupled with a slight Current Affairs blend.

    The ‘Nobel’ family

    • On April 20, 1902, Marie and Pierre Curie successfully isolated radioactive radium salts from pitchblende, a mineral, in a laboratory in Paris, France.
    • They were inspired by French physicist Henri Becquerel’s 1896 experiment on phosphorescence or the phenomenon that allows certain objects to glow in the dark.
    • They were able to find traces of two radioactive elements—polonium (Element 84) and radium (Element 88).
    • Curie shared the 1903 Nobel with her fellow researcher Pierre Currie and Becquerel for their combined work on radioactivity.

    Important facts

    • In 1903, Marie Curie received the Nobel Prize in Physics making her the world’s first woman to win the prize.
    • In 1911, she created history again by becoming the first woman to have won two Nobel awards.
    • The 1911 Nobel Prize in Chemistry was awarded to Marie after she managed to produce radium as a pure metal. This proved the new element’s existence beyond doubt.
    • However, this was not the last Nobel for the Curie family.
    • The 1935 Nobel in Chemistry went to Irène Curie and her husband and co-researcher Frédéric Joliot for their joint work on the artificial creation of new radioactive elements.
    • The Curies have received a total of four of Nobel prizes, the highest won by a single-family. They also have the unique distinction of having three Nobel-prize winning members in the family.

    Birth of Radioactivity

    • While delivering a lecture at the Royal Academy of Sciences in Stockholm, Sweden in 1911, Curie shared some critical details about “radioactive elements” and the phenomenon called “radioactivity”.
    • She also spoke about the chemical properties of radium, the new element that was about a million times more radioactive than uranium.
    • Radium in solid salts was about 5 million times more radioactive than an equal weight of uranium.

    Back2Basics: Radioactivity

    • Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.
    • It is the process by which an unstable atomic nucleus loses energy by radiation.
    • The most common types of radiation are called alpha, beta, and gamma radiation, but there are several other varieties of radioactive decay.
    • Radioactive decay rates are normally stated in terms of their half-lives, and the half-life of a given nuclear species is related to its radiation risk.
    • Examining the amounts of decay products makes possible radioactive dating.

    Its applications

    • Medical use: Many diseases such as cancer are cured by radiotherapy. Sterilization of medical instruments and food is another common application of radiation.
    • Scientific use: Alpha particles emitted from the radioisotopes are used for nuclear reactions.
    • Industrial use: Radioisotopes are used as fuel for atomic energy reactors. Also used in Carbon dating.

  • Unified Geologic Map of the Moon

    The first-ever digital, unified, global, geological map of the moon was released virtually by the  United States Geological Survey (USGS), NASA and the Lunar Planetary Institute.

    Unified Geologic Map of the Moon

    • The UGM will serve as a blueprint for future human missions and a source of research and analysis for the educators and the general public interested in lunar geology.
    • The map is a ‘seamless, globally consistent, 1:5,000,000-scale geologic map’.
    • The mapped surface features of the moon included crater rim crests, buried crater rim crests, fissures, grabens, scarps, mare wrinkle ridges, faults, troughs, rilles, and lineaments.

    How it was prepared?

    • The researchers built on the original digital renovation of the six maps comprising of the near, central far, east, west, north and south sides that was released in 2013.
    • The final map consists of 43 geologic units across the entire lunar surface, broken down into groups based on characteristics like materials of craters, basins, terra, plains and volcanic units.
    • Data from NASA’s Apollo Missions were used to come up with the map.

    Its’ significance

    • The moon’s South Pole is especially interesting because the area is much larger than the North Pole and there could be a possibility of the presence of water in these permanently shadowed areas.
    • Further, the South Pole region also contains the fossil record of the early Solar System.
    • These present and future moon missions’ success can be further helped by the digital map of the moon.
    • The Chandrayaan 2, an active mission also targets the Lunar South Pole for exploration.

  • Reverse Vaccinology and its benefits

    The Tamil Nadu Dr. MGR Medical University has developed a vaccine candidate against SARS-CoV-2 through ‘reverse vaccinology’.

    A definition based prelims question can be expected on Reverse Vaccinology. Ex. Which of the following statements best describes ‘Reverse Vaccinology’?

    Reverse Vaccinology

    • Reverse vaccinology is an improvement on vaccinology that employs applied bioinformatics.
    • The basic idea behind it is that an entire pathogenic genome can be screened using bioinformatics approaches to find genes.
    • Some traits that the genes are monitored for may indicate antigenicity.
    • Those genes are filtered for desirable attributes that would make good vaccine targets such as outer membrane proteins.
    • Once the candidates are identified, they are produced synthetically and are screened in animal models of the infection.
    • Since then, it has been used on several other bacterial vaccines.

    Benefits

    • Earlier researchers had to do a viral culture in the laboratory to develop a vaccine, and this was time-consuming.
    • The major advantage for reverse vaccinology is finding vaccine targets quickly and efficiently.
    • Traditional methods took decades to unravel pathogens and antigens, diseases and immunity
    • With ‘reverse vaccinology’ scientists know what molecules make the genomic sequence.

  • [pib] Super-luminous Supernova SN 2010kd

    Indian researchers have found that SN 2010kd, a super-luminous supernova stands out with the amount of mass as well as Nickel ejected during explosion.

    Space science-related terms these days are often focused on Gravitational waves, Black holes etc. But basic terminologies are very important and need to be taken care of. For example, a layman may hardly find any difference between Novae-Supernovae, Neutron star, Nebula etc. UPSC often tries to bust you with such basic differences.

    What are Supernovae?

    • Supernovae are kind of energetic explosions were the core of massive stars (a few times to that of the mass of our Sun) goes to a catastrophic phase of explosion liberating huge amounts of energy and mass.
    • These events are visible through very far away distances much beyond our own solar system.
    • Super-luminous supernovae are a special type of stellar explosions having energy output 10 or more times higher than that of standard supernovae.

    What is so distinct about SN 2010kd?

    • The mass ejection from SN 2010kd is metallic and is much more than seen in case of normal core-collapse supernovae.
    • The scientists found that SN 2010kd exploded with a larger velocity but decayed slower than other similar supernovae.
    • The observations show that parameters like rotation and metallicity play a crucial role in stellar explosions.

  • [pib] ‘NanoBlitz 3D’ tool to map properties of nano-materials

    Indian scientists have developed an advanced tool for mapping nano-mechanical properties of materials like multi-phase alloys, composites, and multi-layered coatings.

    Nanotechnology is a pathbreaking technology which can create many new materials and devices with a wide range of applications, such as in nanomedicine, nanoelectronics etc.  NanoBlitz 3D is another distinct development. We can expect a prelims question asking what the NanoBlitz 3D is , with confusing options like 3d printing tool etc.

     NanoBlitz 3D

    • Scientists from Advanced Research Centre for Powder Metallurgy and New Materials (ARCI) an autonomous institute under the Dept. of S&T have developed this tool.
    • It is an advanced tool for mapping nano-mechanical properties of materials like multi-phase alloys, composites, and multi-layered coatings.
    • The tool has been useful to yield excellent results on a wide range of material systems, including glass-fibre-reinforced polymer composites, dual-phase steels, softwood and shale.
    • An important aspect of this technique is its high-throughput, with just a few hours of testing required for generating more than 10,000 data points that can be processed using machine learning (ML) algorithms.

  • [pib] Ionospheric Electron Density (IED) and its applications

    Researchers from the Indian Institute of Geomagnetism (IIG), Mumbai, have developed a global model to predict the ionospheric electron density with larger data coverage—a crucial need for communication and navigation.

    We can gauge these days that PIB is coming with ample news which is visibly important and are focused on basic GS concept. Ionospheric Electron Density is one such concept. Its significance for prelims cannot be denied.

    Ionospheric Electron Density (IED)

    • The ionosphere exists between about 90 and 1000 km above the earth’s surface.
    • Radiation from the sun ionizes atoms and molecules here, liberating electrons from molecules and creating a space of free electron and ions.

    Studying IED

    • The ionospheric variability is greatly influenced by both solar originated processes and the neutral atmosphere origin.
    • Scientists have tried to model the ionosphere using theoretical and empirical techniques; however, the accurate prediction of electron density is still a challenging task.
    • In recent years, Artificial Neural Networks (ANNs) are showing potential to handle more complex and non-linear problems.

    What are Artificial Neural Networks (ANNs)?

    • ANNs are computing systems vaguely inspired by the biological neural networks that constitute animal brains.
    • Such systems “learn” to perform tasks by considering examples, generally without being programmed with task-specific rules.
    • For example, in image recognition, they might learn to identify images that contain cats by analyzing example images that have been manually labeled as “cat” or “no cat” and using the results to identify cats in other images.
    • They do this without any prior knowledge of cats, for example, that they have fur, tails, whiskers and cat-like faces.
    • Instead, they automatically generate identifying characteristics from the examples that they process.

    Significance of IED

    • Due to the ability of ionized atmospheric gases to refract high frequency (HF, or shortwave) radio waves, the ionosphere can reflect radio waves directed into the sky back toward the Earth.
    • Radio waves directed at an angle into the sky can return to Earth beyond the horizon.
    • This technique, called “skip” or “skywave” propagation, has been used since the 1920s to communicate at international or intercontinental distances.

  • [pib] What is Big Bang Nucleosynthesis (BBN)?

    Indian researchers have discovered hundreds of Li-rich giant stars produced during BBN indicating that Li is being produced in the stars and accounts for its abundance in the interstellar medium.

    Most of the space based theories and missions are focussed on the formation of our solar system. BBN is the most basic auxillary among them.

    What is Big Bang Nucleosynthesis (BBN)?

    • BBN is the production of nuclei other than those of the lightest isotope of hydrogen during the early phases of the Universe.
    • Primordial nucleosynthesis is believed by most cosmologists to have taken place in the interval from roughly 10 seconds to 20 minutes after the Big Bang.
    • It is calculated to be responsible for the formation of most of the universe’s helium in various isotopic forms.
    • Essentially all of the elements that are heavier than lithium were created much later, by stellar nucleosynthesis in evolving and exploding stars.

    Lithium in space

    • Lithium (Li), is one of the three primordial elements, apart from Hydrogen and Helium (He), produced in the Big Bang Nucleosynthesis (BBN).
    • However, the present measurement of Li in the interstellar medium and very young stars is about 4 times more than the primordial value.
    • Thus, identifying sources of Li enrichment in our Galaxy has been a great interest to researchers to validate BBN as well as a stellar mixing process.
    • In general, stars are considered as Li sinks. This means that the original Li, with which stars are born, only gets depleted over stars’ life-time as Li burns at relatively very low temperatures.

  • [pib] What are Blazars?

    Researchers from the Indian Institute of Astrophysics (IIA), Bangalore have conducted the first systematic study on the gamma-ray flux variability nature on different types of Blazars.

    Strange terminologies from space-based studies are very important from prelims point of view.  We can expect a statement based question seeking to identify the term which is being referred to in the paragraph.

    What are Blazars?

    • At the center of most galaxies, there’s a massive black hole that can have mass of millions or even billions of Suns that accrete gas, dust, and stellar debris around it.
    • As these material falls towards the black hole, their gravitational energy gets converted to light forming active galactic nuclei (AGN).
    • A minority of AGN (~15%) emit collimated charged particles called jets travelling at speeds close to the speed of light.
    • Blazars are AGN whose jets are aligned with the observer’s line of sight.
    • Some blazars are thought to host binary black holes in them and could be potential targets for future gravitational-wave searches.

    Studying blazars

    • Blazars are the most luminous and energetic objects in the known universe were found to be emitters of gamma-rays in the 1990s.
    • It is only with the capability of Fermi Gamma-ray space telescope (launched in 2008) to scan the entire sky once in three hours one is able to probe the flux variability characteristics of blazars on a range of time scales.
    • Gamma-ray band is one of the bands of the electromagnetic spectrum on which there is limited knowledge on the flux variability of blazars.
    • Major problem while studying them is to localize the site for the production of gamma-rays.

    Significance

    • The study of blazars could provide clues to the processes happening close to the black hole, not visible through direct imaging.
    • Exploring blazars will provide key inputs to constrain the high energy production site as well as the high energy emission processes.

  • Virus outbreak can potentially spur the next quantum leap for computing

    The article suggests that the corona crisis would speed up research in the field of quantum computing. The tremendous speed offered by quantum computers will help us find a cure for diseases like Covid-19 in a much shorter duration. This article explains the limitations of classical computers, working of quantum technology, and how quantum computer overcomes these limitations.

    Use of supercomputer to find the cure of Covid-19

    • The whole world is pressurized into quickly discovering a vaccine and a cure for covid-19.
    • IBM’s Summit, the world’s fastest supercomputer, was used for running numerous simulations and computations.
    • These simulations and computations help scientists find promising molecules to fight the pandemic.
    • The latest update says the Summit has been able to identify 77 candidate molecules that researchers can use in trials.
    • This was achieved in just two days, while, traditionally, it has taken months to make such progress.

    Computing capacity as a limit on molecular discoveries

    • Today, faster molecular discoveries are limited by computing capacity.
    • Molecular discoveries are also limited by the need for scientists to write codes for harnessing the computing power.
    • It is no secret that classical computing power is plateauing (e. it is not growing anymore)
    • And till we have scalable artificial intelligence (AI) and machine learning (ML), scientists will have to write code for not only different scenarios but also for different computing platforms.
    • So, what we need today is more computing power.

    The following points explain the limits of classical computers. Pay attention to the Moore’s law, and how it explains the development of semiconductor technologies and in turn computers as a whole.

    What is the solution to the limits of classical computers?

    • Given that we have already neared the peak of classical computing, the solution probably is quantum computing.
    • Not just vaccines, quantum computing can accelerate many innovations, such as hyper-individualized medicines, 3-D printed organs, search engines for the physical world etc.
    • All innovations currently constrained by the size of transistors used in classical computing chips can be unleashed through quantum computing.
    • Moore’s law: In 1965, Gordon Moore had said the number of transistors that can be packed into a given unit of space will double about every two years.
    • Subsequently, in an interview in 2005, he himself admitted that this law can’t continue forever.
    • He had said: “It is the nature of exponential functions, they eventually hit a wall.”
    • Over the last 60 years, we reaped the benefits of Moore’s law in many ways.
    • For instance, compared to initial days of the Intel 4004, the modern 14nm processors deliver way bigger impact—3,500 times better performance and 90,000 times improved efficiency, at 1/60,000th the cost!
    • Yet, we are also seeing his 2005 statement coming true. All the experts agree that the ‘wall’ is very near.
    • So, what next? The answer again is probably the same—quantum computing.

    Quantum technology is one of the emerging and revolutionary technologies, you should be aware of the terms and general principle which lies at the heart of such technology. So, terms like superposition, qubit, binary etc are important if you want to answer a questions related to this technology.

    Quantum computing and its applications

    • It is no more a concept, there are working models available on the cloud.
    • How it works: Quantum computing uses the ability of sub-atomic particles to exist in multiple states simultaneously, until it is observed.
    • The concept of qubits: Unlike classical computers that can store information in just two values, that is 1 or 0, quantum computing uses qubits that can exist in any superposition of these values,
    • This superposition enables quantum computers to solve in seconds problems which a classical computer would take thousands of years to crack.
    • Applications: The application of this technology is enormous, and just to cite a few, it can help with the discovery of new molecules, optimize financial portfolios for different risk scenarios.
    • It can also crack RSA encryption keys, detect stealth aircraft, search massive databases in a split second and truly enable AI.

    Investment in the development of technology

    • In the Union budget this year, the Indian government announced investments of ₹8,000 crores for developing quantum technologies and applications.
    • Globally, too, countries and organizations are rushing to develop this technology and have already invested enormous capital towards its research.

    Conclusion

    Historically, unprecedented crises have always created more innovations than routine challenges or systematic investments. Coincidentally, current times pose similar opportunities in disguise for the development of quantum technologies.

    Back2Basics: Difference between bit and qubit

    • A binary digit, characterized as 0 and 1, is used to represent information in classical computers.
    • A binary digit can represent up to one bit of information, where a bit is the basic unit of information.
    • In classical computer technologies, a processed bit is implemented by one of two levels of low DC voltage.
    • And whilst switching from one of these two levels to the other, a so-called forbidden zone must be passed as fast as possible, as electrical voltage cannot change from one level to another instantaneously.
    • There are two possible outcomes for the measurement of a qubit—usually taken to have the value “0” and “1”, like a bit or binary digit.
    • However, whereas the state of a bit can only be either 0 or 1, the general state of a qubit according to quantum mechanics can be a coherent superposition of both.
    • Moreover, whereas a measurement of a classical bit would not disturb its state, a measurement of a qubit would destroy its coherence and irrevocably disturb the superposition state.
    • It is possible to fully encode one bit in one qubit.
    • However, a qubit can hold more information, e.g. up to two bits using superdense coding.
    • For a system of n components, a complete description of its state in classical physics requires only n bits, whereas in quantum physics it requires 2n−1 complex numbers.

  • Anastomosis surgery for re-implantation

    The chopped off-hand of a Punjab Police officer has been successfully re-implanted after hours of surgery.

    Anastomosis is a general term in surgical sciences used to join amputated limbs or organs. The term has made headline due to its recent application. A piece of general information regarding novelties of medical sciences should be known to the aspirants.

    Anastomosis Surgery

    • A surgical Anastomosis is a surgical technique used to make a new connection between two body structures that carry fluid, such as blood vessels or bowel.
    • It involves conjoining various parts of the arm and the hand — bones, muscles, tendons, arteries, veins as well as nerves.
    • Both radial and ulnar arteries, accompanying nerves and the dorsal vein were anastomosed successfully, allowing for the hand to receive adequate circulation.
    • The bones are attached using K wires (used for orthopaedic surgery) which can be removed once the bones conjoin organically.

    In which cases is re-implantation possible?

    • When a surgeon makes that decision, the factors that he or she considers include how much time has elapsed since the injury.
    • The condition of the severed organ and the nature of the injury are also taken into account.

    Can a reattached hand get its function restored?

    • That is the goal of doing such surgery. The extent of restored function, however, can vary from case to case.
    • While a successful surgery can result in the good return of motor function, studies have shown that sensory recovery can often be poor.
    • Whether the blood circulation is optimum after surgery can only be observed within the next few days.
    • The patient also needs to attend regular physiotherapy sessions for total restoration of motor movement and sensation in his hand.