đŸ’„Join UPSC 2027,2028 Mentorship (July Batch) + XFactor Notes & Microthemes PDF
Talk to Mentor

Civilsdaily

Login

Subject: Science and Technology

  • Quantum Key Distribution (QKD) Technology

    The Defence Research and Development Organisation (DRDO) has successfully demonstrated communication between its two labs using Quantum Key Distribution (QKD) technology.

    Q. What is Quantum Key Distribution (QKD) Technology? Discuss how it enables secure communication networks. (150W)

    What is QKD Technology?

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

    How does it work?

    • In the QKD, encryption keys are sent as qubits in a fibre optic cable. Time-bin encoding is used to encode qubit on a photon.
    • Quantum computing uses qubits as basic resources, similar to how bits are used as basic resources in classical computing.
    • The QKD is designed in a way that if an illegitimate entity tries to read the transmission, it will disturb the qubits – which are encoded on photons.
    • This will generate transmission errors, leading to legitimate end-users being immediately informed.

    Advantages of using QKD

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

  • Plasmodium Ovale and Other types of Malaria

    A not very common type of malaria, Plasmodium Ovale, has been identified in a jawan in Kerala.

    Try this PYQ:

    Q. Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria.

    Why is it difficult to develop an effective malaria vaccine?

    (a) Malaria is caused by several species of Plasmodium

    (b) Man does not develop immunity to malaria during natural infection

    (c) Vaccines can be developed only against bacteria

    (d) Man is only an intermediate host and not the definitive host

    What is Malaria?

    • Malaria is caused by the bite of the female Anopheles mosquito if the mosquito itself is infected with a malarial parasite.
    • There are five kinds of malarial parasites — Plasmodium falciparum, Plasmodium vivax (the commonest ones), Plasmodium malariae, Plasmodium ovale and Plasmodium knowlesi.
    • Therefore, to say that someone has contracted the Plasmodium ovale type of malaria means that the person has been infected by that particular parasite.
    • Malaria is treated with prescription drugs to kill the parasite. Chloroquine is the preferred treatment for any parasite that is sensitive to the drug.

    Plasmodium Ovale

    • P ovale rarely causes severe illness and there is no need for panic.
    • Symptoms include fever for 48 hours, headache and nausea, and the treatment modality is the same as it is for a person infected with P vivax.
    • P ovale is no more dangerous than getting a viral infection.
    • It is termed ovale as about 20% of the parasitised cells are oval in shape.

    Burden of Malaria in India

    • In 2018, the National Vector-borne Disease Control Programme (NVBDCP) estimated that approximately 5 lakh people suffered from malaria.
    • 63% of the cases were of Plasmodium falciparum.
    • The recent World Malaria Report 2020 said cases in India dropped from about 20 million in 2000 to about 5.6 million in 2019.

  • Narrow Band-Internet of Things (NB-IoT)

    In a first, BSNL launches world’s largest NB-IoT to provide connectivity for millions of unconnected machines, sensors and industrial IoT devices across the country.

    What is NB-IoT?

    • NB-IoT is a Low Power Wide Area (LPWA) technology that works virtually anywhere.
    • It will connect many more devices to the Internet of Things and make many new applications a reality.
    • It is optimized for applications that need to communicate small amounts of data over long periods of time.
    • Since it operates in licensed spectrum, it is secure and reliable providing guaranteed quality of service.
    • It connects devices more simply and efficiently on already established mobile networks and handles small amounts of fairly infrequent 2‑way data, securely and reliably.

    And the best is, it provides-

    • very low power consumption
    • excellent extended range in buildings and underground
    • easy deployment into the existing cellular network architecture
    • network security & reliability
    • lower component cost

    Back2Basics: Internet of Things (IoT)

    • The IoT describes the network of physical objects—“things”—that are embedded with sensors, software, and other technologies for the purpose of connecting and exchanging data with other devices and systems over the Internet.
    • The definition of the IoT has evolved due to the convergence of multiple technologies, real-time analytics, AI, sensors, and embedded systems.
    • In the consumer market, IoT technology is most synonymous with products pertaining to the concept of the “smart home”, including devices and appliances.
    • It supports one or more common ecosystems and can be controlled via devices associated with that ecosystem, such as smartphones and smart speakers e.g. Alexa.

    Remember this PYQ?

    When the alarm of your smartphone rings in the morning, you wake up and tap it to stop the alarm which causes your geyser to be switched on automatically. The smart mirror in your bathroom shows the day’s weather and also indicates the level of water in your overhead tank. After you take some groceries from your refrigerator for making breakfast, it recognises the shortage of stock in it and places an order for the supply of fresh grocery items. When You step out of your house and lock the door, all lights, fans, geysers and AC machines get switched off automatically. On your way to office, your car warns you about traffic congestion ahead and suggests an alternative route, and if you are late for a meeting, it sends a message to your office accordingly.

    In the context of emerging communication technologies, which one of the following terms best applies to the above scenario?

    (a) Border Gateway Protocol

    (b) Internet of Things

    (c) Internet Protocol

    (d) Virtual Private Network

    Also read:

    [Burning Issue] Internet of Things (IoT)

  • Fortified rice in PDS

    As the Odisha government is preparing to launch fortified rice in the Public Distribution System (PDS), some 100 activists have opposed the move.

    Q.What is Fortification of Food? Discuss its various advantages and limitations.

    What is Fortified Rice?

    • Rice can be fortified by adding a micronutrient powder to the rice that adheres to the grains or spraying of the surface of ordinary rice grains with a vitamin and mineral mix to form a protective coating.
    • Rice can also be extruded and shaped into partially precooked grain-like structures resembling rice grains, which can then be blended with natural polished rice.
    • Rice kernels can be fortified with several micro-nutrients, such as iron, folic acid and other B-complex vitamins, vitamin A and zinc.
    • These fortified kernels are then mixed with normal rice in a 1:100 ratio, and distributed for consumption.

    Its advantage

    • Fortified staple foods will contain natural or near natural levels of micro-nutrients, which may not necessarily be the case with supplements.
    • It provides nutrition without any change in characteristics of food or course of our meals.
    • If consumed on a regular and frequent basis, fortified foods will maintain body stores of nutrients more efficiently and more effectively than will intermittent supplements.
    • The overall costs of fortification are extremely low; the price increase is approximately 1 to 2 per cent of the total food value.

    Issues with fortified food

    • Fortification and enrichment upsets nature’s packaging. Our body does not absorb individual nutrients added to processed foods as efficiently compared to nutrients naturally occurring.
    • Supplements added to foods are less bioavailable. Bioavailability refers to the proportion of a nutrient your body is able to absorb and use.
    • They lack immune-boosting substances.
    • Fortified foods and supplements can pose specific risks for people who are taking prescription medications, including decreased absorption of other micro-nutrients, treatment failure, and increased mortality risk.

    Why did the activists protest?

    • Vitamin C and calcium are available in abundance in natural food. Vitamin C is water soluble.
    • If the rice is laced with Vitamin C, it will get washed away while the rice is cleaned before cooking.
    • It is a futile exercise to add Vitamin C to uncooked rice.
    • In our traditional cooking practices, lemon juice is squeezed into cooked food before its consumption.
    • The decision would lead to wasteful expenditure of taxpayers’ money.

    Note: Biofortification is the process by which the nutritional quality of food crops is improved through agronomic practices, conventional plant breeding, or modern biotechnology. It differs from conventional fortification in that Biofortification aims to increase nutrient levels in crops during plant growth rather than through manual means during the processing of the crops.

    Regulating fortification

    • FSSAI has formulated a comprehensive regulation on fortification of foods namely ‘Food Safety and Standards (Fortification of Foods) Regulations, 2016’.
    • These regulations set the standards for food fortification and encourage the production, manufacture, distribution, sale and consumption of fortified foods.
    • The regulations also provide for the specific role of FSSAI in promotion for food fortification and to make fortification mandatory.
    • WHO recommends fortification of rice with iron, vitamin A and folic acid as a public health strategy to improve the iron status of population wherever rice is a staple food.

    Why it is necessary ?

    • Reaching target populations
    • Avoiding over-consumption in non-target groups
    • Monitoring nutritional status

  • What is Molnupiravir?

    A new drug called Molnupiravir has been shown to stop the transmission of SARS-CoV-2 in 24 hours.

    Must read:

    What is mRNA vaccine?

    Molnupiravir

    • Molnupiravir is an experimental antiviral drug which is orally active and was developed for the treatment of influenza.
    • It is a drug of the synthetic nucleoside derivative N4-hydroxycytidine, and exerts its antiviral action through introduction of copying errors during viral RNA replication.
    • Molnupiravir is being developed by the biotechnology firm Ridgeback Biotherapeutics in collaboration with pharmaceutical firm Merck.
    • The research team repurposed MK-4482/EIDD-2801 against SARS-CoV-2 and tested it on ferrets.
    • This is the first demonstration of an orally available drug to rapidly block SARS-CoV-2 transmission and it can be a game-changer.

  • Debate over Coding for Kids

    Various edutech startups have been in the news for the past several months over the debate on the right age for children to start learning to code.

    Q.The National Education Policy, 2020 proposal for “coding activities” reads like Macaulay’s minute for English education in the early 19th century. Examine.

    What is Coding?

    • Computers have their own language called programming language which tells them what to do.
    • Coding is the process of using a programming language to get a computer to behave how you want it to.
    • In a broader sense, it is the process of designing and building an executable computer program to accomplish a specific computing result or to perform a specific task.

    In today’s digital age, most toddlers in their diapers, learn to swipe and click before they can speak apparently or walk. What an irony!

    Coding for children

    • In the age of digital revolution, India was able to produce a huge army of coders and programmers —essentially people who could create computer software.
    • As computing devices have taken over every aspect of life, the need for good programmers and coders has been increasing relentlessly.
    • This led to a trend to teach coding and programming to young students since their school ages.
    • In recent years, platforms and companies have started to claim that kids as young as those in elementary school must begin to learn to code.

    Proponents for coding

    • Leaders of technology companies around the world have pushed for coding to be included as a subject in middle or higher secondary school for students who may be interested to learn.
    • In 2018, Microsoft co-founder Bill Gates wrote in a blog post that everyone could benefit from learning the basics of computer science.
    • The idea was to make coding as simple and accessible as the new age “mother tongue” for young children.

    Why should children learn to code?

    • Coding is a basic literacy in the digital age, and it is important for kids to understand and be able to work with and understand the technology around them.
    • It fosters creativity. By experimenting, children learn and strengthen their creativity. It enhances their problem-solving capability.
    • It helps children to be able to visualize abstract concepts, lets them apply math to real-world situations, and makes math fun and creative. Coding is present in many of today’s STEM programs.
    • Children who learn to code understand how to plan and organize thoughts.  This can lead to better writing skills that can be built upon as coding skills develop over time.

    Criticisms of early age coding

    • A metaphor that is often used is that children are being made to ride a bicycle before they have even learnt to walk.
    • There’s a reason why in mathematics addition is taught first, then subtraction, then multiplication, and then division.
    • It is necessary to learn several elements of mathematics and logical thinking before one can code.

  • What is Havana Syndrome?

    Nearly four years after a mysterious neurological illness started to affect American diplomats in Cuba, China, and other countries, a report has found “directed” microwave radiation to be its “plausible” cause.

    Q.Microwave warfare is the new nuke. Discuss.

    The ‘Havana syndrome’

    • In late 2016, US diplomats in Havana reported feeling ill after hearing strange sounds and experiencing odd physical sensations in their hotel rooms or homes.
    • The symptoms included nausea, severe headaches, fatigue, dizziness, sleep problems, and hearing loss, which have since come to be known as “Havana Syndrome”.
    • Cuba had denied any knowledge of the illnesses even though the US had accused it of carrying out “sonic attacks”, leading to an increase in tensions.

    Possible factor: Microwave Weapons

    • “Microwave weapons” are supposed to be a type of direct energy weapons, which aim highly focused energy in the form of sonic, laser, or microwaves, at a target.
    • People exposed to high-intensity microwave pulses have reported a clicking or buzzing sound as if seeming to be coming from within your head.
    • It can have both acute and long-term effects — without leaving signs of physical damage.
    • These weapons are considered to be the cause of the “syndrome” whose symptoms include nausea, dizziness, fatigue, and cognitive difficulties.

    How did researchers deduce that?

    • The researchers have examined four possibilities to explain the symptoms — infection, chemicals, psychological factors and microwave energy.
    • The experts examined the symptoms of about 40 government employees.
    • The report concluded that directed pulsed RF (radio frequency) energy appears to be the most plausible mechanism in explaining these cases among those that the committee considered.

  • HL-2M Tokamak: The Artificial Sun of China

    China successfully powered up its “artificial sun” nuclear fusion reactor for the first time marking a great advance in the country’s nuclear power research capabilities.

    Scratch your school basics to answer this PYQ:

    Q.The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force.

    With reference to them, which one of the following statements is not correct? (CSP 2012)

    (a) Gravity is the strongest of the four

    (b) Electromagnetism act only on particles with an electric charge

    (c) Weak nuclear force causes radioactivity

    (d) Strong nuclear force holds protons and neutrons inside the nuclear of an atom.

    HL-2M Tokamak

    • The HL-2M Tokamak reactor is China’s largest and most advanced nuclear fusion experimental research device.
    • The mission is named Experimental Advanced Superconducting Tokamak (EAST).
    • Located in Sichuan province and completed late last year, the reactor is often called an “artificial sun” on account of the enormous heat and power it produces.
    • It uses a powerful magnetic field to fuse hot plasma and can reach temperatures of over 150 million degrees Celsius- approximately ten times hotter than the core of the sun.
    • Scientists hope that the device can potentially unlock a powerful clean energy source.

    Back2Basics: Nuclear Fusion

    • Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
    • Fusion is the process by which the sun and other stars generate light and heat. It is a nuclear process, where energy is produced by smashing together light atoms.
    • It is the opposite reaction of fission, where heavy elements like Uranium and Thorium are split apart.

    Nuclear Fusion Reaction

    • For a nuclear fusion reaction to occur, it is necessary to bring two nuclei so close that nuclear forces become active and glue the nuclei together.
    • Nuclear forces are small-distance forces and have to act against the electrostatic forces where positively charged nuclei repel each other.
    • This is the reason nuclear fusion reactions occur mostly in high density, high-temperature environment (millions of degree Celsius) which is practically very difficult to achieve under laboratory conditions.

  • [pib] The Cancer Genome Atlas (TCGA)

    The Ministry of Science & Technology has inaugurated the 2nd Cancer Genome Atlas (TCGA) 2020 Conference.

    Do you know?

    According to the World Cancer Report by the WHO, one in 10 Indians develops cancer during their lifetime and one in 15 dies of the disease!

    The Cancer Genome Atlas

    • The Cancer Genome Atlas (TCGA) is a landmark project started in 2005 by the US-based National Cancer Institute (NCI) and the National Human Genome Research Institute (NHGRI).
    • The idea was to make a catalogue of the genetic mutations that cause cancer.
    • This meant collecting tumour samples and blood samples (known as the germline) from patients and processing them using gene sequencing and bioinformatics.
    • The TCGA is a continuing effort even after fifteen years and has generated over 2.5 petabytes of data for over 11,000 patients.
    • This data is available to researchers all around the world and has been used to develop new approaches to diagnose, treat and prevent cancer.

    Indian Cancer Genome Atlas (ICGA)

    • On similar lines, the establishment of an ICGA has been initiated by a consortium of key stakeholders in India led by CSIR in which several government agencies, cancer hospitals, academic institutions and private sector partners.
    • It is aimed at improving clinical outcomes in cancer and other chronic diseases.

    Why need such Atlas?

    • Diverse molecular mechanisms- including genetic and lifestyle factors contribute to cancer, posing significant challenges to treatment.
    • Therefore, it is necessary to better understand the underlying factors- patient by patient.
    • In this context, it is important to create an indigenous, open-source and comprehensive database of molecular profiles of all cancer prevalent in Indian population.

  • Surveyor-2 Spacecraft

    NASA has confirmed that the Near-Earth Object called 2020 SO is the rocket booster that helped lift the space agency’s Surveyor spacecraft toward the Moon in 1966.

    Try this PYQ:

    Consider the following phenomena:

    1. Size of the sun at dusk
    2. Colour of the sun at dawn
    3. Moon being visible at dawn
    4. Twinkle of stars in the sky
    5. Polestar being visible in the sky

    Which of the above are optical illusions?

    (a) 1, 2 and 3

    (b) 3, 4 and 5

    (c) 1, 2 and 4

    (d) 2, 3 and 5

    What is Surveyor-2?

    • The Surveyor-2 spacecraft was supposed to make a soft landing on the Moon’s surface in September 1966, during which time one of the three thrusters failed to ignite.
    • As a result of this the spacecraft started spinning and crashed on the surface.
    • The aim of the mission was to reconnoiter the lunar surface ahead of the Apollo missions that led to the first lunar landing in 1969.
    • While the spacecraft crashed into the Moon’s surface, the rocket booster disappeared into an unknown orbit around the Sun.

    How was the object determined to be the rocket booster?

    • Astronomers track asteroids using telescope to determine if there are potentially hazardous asteroids that pose a threat to the planet.
    • Therefore, it is also important for them to be able to distinguish between natural and artificial objects that orbit around the Sun.
    • The rocket booster has come “somewhat close” to the Earth in the past few decades.
    • One approach to the Earth in late 1966 was so close that the object was thought to have originated from Earth.
    • In September, the NASA-funded telescope detected it.