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Subject: Science and Technology

  • FlDepth: New ISRO Tool to Measure Flood Depth from Space

    Why in the News

    Researchers at the National Remote Sensing Centre have developed FlDepth, a new GIS based tool that measures floodwater depth from space in near real time.

    What is FlDepth

    • A satellite based flood depth estimation tool
    • Developed by ISRO National Remote Sensing Centre
    • Converts 2D satellite flood images into 3D flood depth maps
    • Helps in disaster response and flood management
    [2019] For the measurement/estimation of which of the following are satellite images/remote sensing data used? 
    1 Chlorophyll content in the vegetation of a specific location 
    2 Greenhouse gas emissions from rice paddies of a specific location 
    3 Land surface temperatures of a specific location 
    Select the correct answer using the code given below: (a) 1 only (b) 2 and 3 only (c) 3 only (d) 1, 2 and 3
  • IVRI Produces Sahiwal Calves Using Advanced Reproductive Technology

    Why in the News

    The Indian Veterinary Research Institute successfully produced Sahiwal breed calves using advanced Assisted Reproductive Technologies, marking a major breakthrough in genetic improvement of indigenous cattle.

    Key Highlights

    • Institute: ICAR–Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly
    • Breed: Sahiwal indigenous cattle
    • Technology used:
      • Ovum Pick Up (OPU)
      • In-Vitro Fertilisation (IVF)
      • Embryo Transfer (ET)
    • Five healthy Sahiwal calves born within five days starting 28 February 2026

    What is OPU-IVF-ET Technology

    • Ovum Pick-Up (OPU): Ultrasound-guided collection of eggs from elite female animals
    • In-Vitro Fertilisation (IVF): Fertilisation in laboratory using selected superior semen
    • Embryo Transfer (ET): Developed embryos transferred to surrogate mothers
      • Enables rapid multiplication of superior genetics

    Why the Sahiwal Breed is Important

    • Indigenous dairy breed
    • Heat tolerant
    • Disease resistant
    • Suitable for tropical climates
    • High milk productivity among native breeds
    [2017] What is the application of Somatic Cell Nuclear Transfer Technology? (a) Production of biolarvicides (b) Manufacture of biodegradable plastics (c) Reproductive cloning of animals (d) Production of organisms free of diseases
  • DEFENCE NEWS 2026

    1. Integrated Guided Missile Development Programme (IGMDP)

    • Launched: 1983
    • Leader: A.P.J. Abdul Kalam
    • Objective: Self-reliance in missile technology
    • Duration: 1983 to 2012

    Missiles (PATNA):

    • Prithvi: Surface to Surface
    • Agni: Ballistic (later separated)
    • Trishul: Short range SAM
    • Nag: Anti tank, fire and forget
    • Akash: Medium range SAM

    Keywords: Self-reliance, Indigenous missiles, Strategic deterrence

    Prelims Traps:

    • IGMDP not ongoing
    • Agni separated from programme

    2. Ballistic vs Cruise Missiles

    Ballistic Missile:

    • Path: Parabolic trajectory
    • Propulsion: Initial phase only
    • Altitude: Outside atmosphere
    • Speed: Hypersonic

    Cruise Missile:

    • Path: Aircraft-like
    • Propulsion: Continuous
    • Altitude: Low altitude
    • Accuracy: High

    Keywords: Trajectory, Propulsion, Detection

    Prelims Traps:

    • Cruise missiles harder to detect
    • Ballistic missiles less maneuverable

    3. Hypersonic Technology

    • Speed: Mach 5 and above

    Types:

    • HGV: Rocket launched, glide phase
    • Hypersonic Cruise: Scramjet powered

    India:

    • HSTDV by DRDO
    • Scramjet tested by ISRO

    Engine Types:

    • Ramjet: Subsonic combustion
    • Scramjet: Supersonic combustion

    Keywords: Mach 5, Scramjet, Hypersonic

    Prelims Traps:

    • Scramjet requires very high initial speed

    4. Agni Series Missiles

    Agni V:

    • Range: Greater than 5000 km
    • Type: Ballistic
    • Feature: MIRV capable

    Agni Prime:

    • Range: 1000 to 2000 km
    • Feature: Canisterised

    Keywords: MIRV, Canisterisation, Strategic missile

    Prelims Traps:

    • Canisterisation reduces launch time

    5. Pralay Missile

    • Type: Quasi ballistic
    • Range: 150 to 500 km
    • Payload: 500 to 1000 kg

    Features:

    • Maneuverable trajectory
    • Hard to intercept

    Keywords: Quasi ballistic, Tactical missile

    Prelims Trap:

    • Not a cruise missile

    6. Astra Mk III (Gandiva)

    • Type: Air to air missile
    • Range: 300 to 350 km
    • Speed: Around Mach 4.5

    Platforms:

    • Su 30 MKI
    • Tejas

    Keywords: BVR missile, Air combat

    Prelims Trap:

    • Beyond Visual Range missile

    7. BrahMos Missile

    • Type: Supersonic cruise missile
    • Speed: Around Mach 3
    • Range: Around 350 km

    Developed by:

    • India and Russia

    Variants:

    • Land, Air, Sea, Submarine

    Keywords: Supersonic, Ramjet, Fire and forget

    Prelims Traps:

    • Uses ramjet engine

    8. Akashteer System

    • Type: AI enabled air defence system
    • Developer: Bharat Electronics Limited
    • Induction: 2024

    Features:

    • Autonomous monitoring
    • Tri services integration

    Keywords: AI defence, C4ISR integration

    Prelims Trap:

    • Army focused system

    9. IACCS

    • Full Form: Integrated Air Command and Control System
    • Service: Indian Air Force

    Features:

    • Radar integration
    • Real time data sharing
    • Multi layer defence

    Layers:

    • Counter drone
    • Short range
    • Medium range
    • Long range

    Keywords: Network centric warfare, Air defence

    Prelims Trap:

    • Not a Navy system

    10. Project Kusha

    • Type: Long range air defence system
    • Developer: DRDO

    Features:

    • Interceptors: 150, 250, 350 km
    • Comparable to S 400, Patriot

    Keywords: Missile shield, Indigenous defence

    Prelims Trap:

    • Fully indigenous

    11. Directed Energy Weapon (Sahastra Shakti)

    • Type: Laser weapon
    • Power: 30 kilowatt
    • Developer: DRDO

    Targets:

    • Drones
    • Missiles

    Keywords: Laser, Speed of light, DEW

    Prelims Trap:

    • No conventional ammunition

    12. K 4 Missile

    • Type: SLBM
    • Range: Around 3500 km

    Platform:

    • Nuclear submarines

    Keywords: Second strike, Nuclear deterrence


    13. INS Taragiri

    • Type: Stealth frigate
    • Project: 17A
    • Class: Nilgiri

    Features:

    • 75 percent indigenous
    • Multi mission

    Keywords: Stealth, Naval modernization


    14. Fighter Aircraft Generations

    4th Generation:

    • Maneuverability

    4.5 Generation:

    • AESA radar
    • Advanced avionics

    5th Generation:

    • Stealth
    • Sensor fusion

    6th Generation:

    • AI integration
    • Drone teaming

    India:

    • Tejas Mk1A: 4.5 generation
    • AMCA: 5th generation

    Keywords: Stealth, AESA, AI

    Prelims Trap:

    • 4.5 generation not stealth

    15. Drone Systems

    Types:

    • HALE: MQ 9B
    • MALE: TAPAS, Rustom
    • Loitering munition: Harop

    Indian Systems:

    • Indrajaal: Anti drone dome
    • Bhragavastra: Micro missile system

    Keywords: UAV, Loitering munition, Surveillance

    Prelims Trap:

    • Loitering munition is drone missile hybrid

    16. Sonobuoys

    • Use: Anti submarine warfare

    Working:

    • Dropped in water
    • Hydrophone detects sound
    • Data transmitted to aircraft

    Keywords: Underwater detection, Acoustic signals

    Prelims Trap:

    • Not radar based

    17. Mission Sudarshan Chakra

    • Announcement: 15 August 2025

    Objective:

    • National security shield by 2035

    Coverage:

    • Air, land, sea
    • Civilian infrastructure

    Keywords: Integrated defence, National security


    18. Golden Dome

    • Country: USA
    • Type: Missile defence system

    Features:

    • Ground and space based

    Legal Aspect:

    • Outer Space Treaty bans WMD in space
    • Conventional weapons allowed

    Keywords: Space militarisation, Missile shield

    Prelims Trap:

    • Space not fully demilitarised
  • Quantum Battery Breakthrough  

    Why in the News

    • Scientists from CSIRO, RMIT University, and University of Melbourne developed the first proof-of-concept quantum battery (March 2026).

    What is a Quantum Battery

    • A quantum battery is an energy storage device that uses principles of quantum mechanics instead of chemical reactions.
    • It can charge, store, and discharge energy like conventional batteries.

    Key Quantum Principles Used

    • Superposition: A system can exist in multiple states simultaneously.
    • Entanglement: Particles become interconnected, enabling coordinated energy transfer.

    Key Features of the Prototype

    • Built using multi-layered organic microcavity.
    • Wireless charging using laser.
    • Operates at room temperature.
    • Energy stored lasts much longer than charging time (very high efficiency).

    Unique Property

    • Charging speed increases with size
      • Opposite to classical batteries.
      • Known as quantum advantage in charging.

    Potential Applications

    • Ultra-fast charging of electric vehicles.
    • Wireless energy transfer over long distances.
    • High-efficiency next-generation energy storage systems.

    Current Limitations

    • Still at proof-of-concept stage.
    • Major challenge: extending energy storage duration for practical use.

    Significance

    • Confirms theoretical predictions in quantum thermodynamics.
    • Could revolutionize energy storage, transmission, and efficiency.
    [2022] Which one of the following is the context in which the term “qubit” is mentioned? (a) Cloud Services (b) Quantum Computing (c) Visible Light Communication Technologies (d) Wireless Communication Technologies
  • Biopharma SHAKTI Scheme: Boosting India’s Biologics & Biosimilars Sector

    Why in the News

    The Government has announced the Biopharma SHAKTI Scheme with an outlay of ₹10,000 crore (5 years) to strengthen India’s biopharmaceutical ecosystem and enhance global competitiveness.

    What is Biopharma SHAKTI?

    • A flagship initiative to:
      • Promote biologics and biosimilars manufacturing
      • Support R&D, clinical trials, and innovation
    • Goal: Make India a global biopharma hub and ensure affordable healthcare

    Key Objectives

    • Build a self-reliant biopharma ecosystem
    • Reduce import dependence
    • Improve global competitiveness
    • Promote innovation-driven manufacturing

    Major Components of the Scheme

    • Funding Support: Discovery Grant Fund and Equity Fund for drug development
    • R&D Ecosystem
      • Strengthening: National Institute of Pharmaceutical Education and Research (NIPER)
      • Creation of a National Biopharma R&D Network
    • Clinical Trials Expansion
      • 1,000 accredited trial sites across India
      • Led by Indian Council of Medical Research (ICMR)
    • Manufacturing Boost
      • Incentives for: Fermentation-based bulk drugs and Biopharma manufacturing inputs
    • Devices & Packaging
      • Develop ecosystem for: Drug delivery devices and Advanced packaging. 
    • Biosimilars & Biologics Production: Biosimilars (cost-effective versions of biologics) and Emerging biologics like gene therapies.
    • Regulatory Strengthening: Strengthen Central Drugs Standard Control Organisation (CDSCO)
      • Create scientific review cadre
      • Faster and globally credible approvals

    What are Biologics & Biosimilars?

    • Biologics: Medicines derived from living organisms (e.g., vaccines, monoclonal antibodies)
    • Biosimilars: Cheaper versions of biologics with similar efficacy
    • Not identical (due to complexity of biologics)
    • Must show no clinically meaningful differences in safety, purity, and effectiveness
    [2025] With reference to monoclonal antibodies, consider the following: 
    1. They are man-made proteins. 
    2. They stimulate the patient’s immune system to fight the specific disease. 
    3. They are produced using animal cells only. 
    Select the correct answer using the code given below: 
    (a) I and II only (b) II and III only (c) I and III only (d) All the three
  • National Quantum Mission: Govt Clears 23 Institutions for Quantum Labs

    Why in the News

    The Government has approved 23 institutions to set up quantum teaching laboratories under the National Quantum Mission, with around 100 more proposals under evaluation.

    About National Quantum Mission (NQM)

    • Approved in 2023 with an outlay of ₹6003.65 crore
    • Duration: 2023–2031
    • Aim: Position India as a global leader in quantum technologies

    Key Objectives

    • Quantum Computing: Develop 50–1,000 qubit quantum computers
      • Higher qubits = more computational power
    • Quantum Communication: Build satellite-based secure communication systems.
      • Enable hack-proof encryption (quantum key distribution)
    • Quantum Sensing & Materials: 
      • Develop: High-precision sensors (defence, navigation) and Advanced quantum materials.

    What are Quantum Labs?

    • Teaching and research facilities in universities
    • Focus on:
      • Training students in quantum technologies
      • Building skilled manpower
    • Help bridge India’s quantum skill gap

    Significance of the Move

    • Capacity Building: Creates a pipeline of skilled researchers and engineers
      • Strengthens India’s R&D ecosystem
    • Strategic Importance: Quantum tech has applications in:
      • Defence (secure communication)
      • Cybersecurity
      • Space & navigation
    • Helps India compete with:
      • United States
      • China
    • Economic Potential: Quantum technologies expected to drive: Next-gen computing and Innovation-led growth. 
    [2022] Which one of the following is the context in which the term “qubit” is mentioned? (a) Cloud Services (b) Quantum Computing (c) Visible Light Communication Technologies (d) Wireless Communication Technologies
  • NavIC (Navigation with Indian Constellation)

    Why in the News

    India’s indigenous navigation system NavIC has been weakened after the failure of the last atomic clock onboard the satellite IRNSS-1F.
    This has reduced the number of fully functional satellites to below the required minimum, affecting navigation accuracy.

    What is NavIC?

    • Developed by ISRO.
    • India’s regional alternative to GPS.
    • Provides Position, Navigation, and Timing (PNT) services.
    • Coverage: India + ~1500 km beyond its borders.

    Role of Atomic Clocks

    • Atomic clocks provide extremely precise time signals.
    • Navigation works by measuring time delay of signals from satellites.
    • Even a tiny error in time → large error in location
    • Hence, clock failure = loss of navigation capability.

    What has happened?

    • The last working atomic clock on IRNSS-1F failed (March 2026).
    • Many earlier NavIC satellites had already lost their clocks.
    • Now:
      • Only 3 satellites are effectively usable
      • Minimum 4 satellites needed for reliable navigation

    Why is this a Concern?

    • Weakens India’s GPS Alternative: NavIC is meant as a strategic backup to systems like GPS (Global Positioning System).
      • Failure reduces self-reliance in critical sectors.
    • Strategic & Security Implications: In conflicts, access to foreign systems may be restricted or denied.
      • Weak NavIC leads to vulnerability in defence navigation.
    • Impact on Civil Applications:
      • Transport and logistics
      • Disaster management
      • Timing systems (banking, telecom)

    Causes of the Problem

    • Heavy reliance on imported atomic clocks (from foreign suppliers).
    • Ageing satellites (many crossed 10-year design life).
    • Earlier multiple clock failures across satellites.

    Steps Taken by India

    • Indigenous Atomic Clocks: New satellites use indigenously developed rubidium atomic clocks. Example: NVS-01
    • Replacement Satellites: ISRO plans to launch at least 3 new satellites by 2026.
    [2018] With reference to the Indian Regional Navigation Satellite System (IRNSS), consider the following statements: IRNSS has three satellites in geostationary and four satellites in geosynchronous orbits. IRNSS covers entire India and about 5500 sq. km beyond its borders. India will have its own satellite navigation system with full global coverage by the middle of 2019. Select the correct answer using the code given below: (a) 1 only (b) 1 and 2 only (c) 2 and 3 only (d) None
  • Starship Delays May Affect NASA’s Moon Landing Timeline

    Why in the News

    A report by NASA’s Inspector General warns that delays in SpaceX Starship could affect the timeline of the Artemis Program, which aims to land humans on the Moon before 2030.

    Background: Artemis Moon Mission

    • NASA is working with private companies like SpaceX and Blue Origin
    • The Artemis programme aims to establish sustainable human missions to the Moon and eventually support missions to Mars.
    • Originally, the Moon landing under Artemis III was targeted for 2024, but delays have pushed the timeline to around 2028 or later.

    Why It Is Difficult

    • Starship uses liquid methane and liquid oxygen as fuel. These must be stored at cryogenic temperatures below −150°C.
    • The system must perform multiple docking and fuel transfers in Low Earth Orbit (LEO).
    • LEO already has heavy satellite traffic, increasing operational risk.
    [2011] An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth (a) does not exist at such a distance. (b) is neutralized by the attraction of the moon. (c) provides the necessary speed for its steady motion. (d) provides the necessary acceleration for its motion.
  • [11th March 2026] The Hindu OpED: AI and the national security calculus

    PYQ Relevance[UPSC 2023] Introduce the concept of Artificial Intelligence (AI). How does AI help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of AI in healthcare?Linkage: The article discusses AI as a dual-use technology with security implications, highlighting concerns about surveillance, military integration, and governance of AI systems. The PYQ connects through debates on ethical risks, regulation, and societal impacts of AI deployment.

    Mentor’s Comment

    The rapid rise of Artificial Intelligence (AI) has pushed it from a commercial technology to a strategic national security asset. The debate intensified after American AI company Anthropic urged the U.S. government to classify Chinese AI labs like DeepSeek, Moonshot AI, and MiniMax as national security threats. The controversy reflects a deeper policy dilemma: Should AI be treated like nuclear technology requiring strict controls, or like a dual-use digital technology that thrives on open innovation? The issue has implications for military decision-making, global technological competition, and governance of autonomous systems.

    Is AI becoming a national security technology comparable to nuclear weapons?

    1. Dual-Use Technology: AI functions as a general-purpose technology used for civilian innovation and military operations. Unlike nuclear weapons, AI also drives sectors such as healthcare, finance, and digital governance.
    2. Military Integration: AI models assist in accelerating the military “kill chain”, supporting target identification, intelligence analysis, and operational decisions.
    3. Technological Diffusion: AI research occurs across universities, private firms, and open-source communities, enabling rapid global diffusion.
    4. Comparative Argument: Nuclear non-proliferation succeeds due to scarcity of fissile material, whereas AI relies on widely accessible resources like data and computing.

    What is AI model distillation and why is it controversial?

    1. Model Distillation: Distillation involves training smaller AI models using the outputs of larger frontier models to replicate capabilities at lower computational cost.
    2. Industrial-Scale Claims: Anthropic alleges 16 million interactions with its Claude model through around 24,000 accounts, suggesting systematic distillation efforts.
    3. Strategic Advantage: Distillation enables competitors to achieve frontier-level performance at a fraction of the cost of original research.
    4. Intellectual Property Issues: Companies argue distillation violates terms of service and proprietary model safeguards.

    Why are export controls and technological restrictions facing limitations?

    1. Circumvention of Restrictions: Export controls on advanced chips and inputs often face workarounds through alternative supply chains or domestic development.
    2. Human Capital Mobility: AI researchers frequently work across countries, making technological containment difficult.
    3. Diffusion of Knowledge: AI research spreads through academic publications, open-source models, and global conferences.
    4. Policy Ineffectiveness: Restrictions may fail to prevent competitors from achieving comparable performance, as illustrated by emerging Chinese AI models.

    Do corporate guardrails effectively regulate military uses of AI?

    1. Corporate Governance Limits: Private companies can modify or remove safeguards when responding to government contracts.
    2. Defense Integration: AI firms increasingly compete for military and national security contracts, accelerating integration into defence systems.
      1. Example: Some firms accept permissive contracts allowing military use of AI models, illustrating the competitive pressure in defence technology markets.
    3. Regulatory Gap: Corporate policies alone cannot substitute state-led governance frameworks for military AI use.

    Why does AI governance require international cooperation?

    1. Inevitable Military Adoption: Armed forces globally are integrating generative AI into surveillance, cyber warfare, and autonomous systems.
    2. Need for Global Norms: Effective regulation requires plurilateral commitments among states rather than unilateral corporate decisions.
    3. Human Control: Governance frameworks must ensure meaningful human oversight in lethal decision-making systems.
    4. Restrictions on Mass Surveillance: Global norms should prohibit large-scale civilian surveillance enabled by AI systems.

    Way Forward: Strengthening Global Governance of AI in National Security

    1. Multilateral AI Governance Framework: Establishes global rules for responsible AI deployment through platforms like the United Nations and the UNESCO which already adopted the Recommendation on the Ethics of Artificial Intelligence (2021) promoting transparency, accountability, and human rights protection.
    2. AI Safety and Risk Management Regimes: Strengthens international cooperation through initiatives like the Global Partnership on Artificial Intelligence (GPAI) and the OECD AI Principles, which promote responsible AI innovation, democratic values, and safeguards against misuse.
    3. Regulation of Military AI Systems: Develops binding norms on autonomous weapons through negotiations under the United Nations Convention on Certain Conventional Weapons (CCW), focusing on meaningful human control over lethal autonomous weapons systems (LAWS).
    4. Global Technology Export and Monitoring Mechanisms: Expands export-control regimes such as the Wassenaar Arrangement to include AI algorithms, advanced chips, and surveillance systems to prevent uncontrolled proliferation.
    5. Data Governance and Digital Rights Protection: Aligns AI regulation with frameworks such as the European Union AI Act, which classifies AI systems by risk level and restricts high-risk surveillance technologies.
    6. International Research Collaboration: Promotes open but secure collaboration among states, universities, and companies through forums like the G20 and World Economic Forum, ensuring innovation while maintaining safeguards.
    7. India’s Strategic Role: India can leverage platforms such as the BRICS, Quad, and G20 to push for ethical AI standards, responsible military use, and inclusive technological governance.

    Conclusion

    Artificial Intelligence is transforming the intersection of technology, geopolitics, and national security. Unlike nuclear technology, AI cannot be easily contained due to its open research ecosystem, global talent mobility, and digital diffusion. Effective governance therefore requires international norms, state-led oversight, and responsible corporate practices to balance innovation with security.

  • Chile Eliminates Leprosy

    Why in the News

    The World Health Organization (WHO) and the Pan American Health Organization (PAHO) have officially verified Chile as the first country in the Americas and the second globally to eliminate leprosy as a public health problem.

    Leprosy (Hansen’s Disease)

    • A chronic infectious disease caused by the bacterium Mycobacterium leprae.
    • Primarily affects:
      • Skin
      • Peripheral nerves
      • Upper respiratory tract mucosa
      • Eyes
    • If untreated, it can cause permanent nerve damage and disability.

    Transmission

    • Spread through respiratory droplets from the nose and mouth of untreated patients.
    • Requires close and prolonged contact.
    • Not highly contagious.

    Incubation Period

    • Very long incubation period.
    • Average: ~5 years, but symptoms may appear up to 20 years later.

    Symptoms

    • Pale or reddish skin patches with loss of sensation
    • Numbness and nerve damage
    • Muscle weakness in hands and feet
    • Painless ulcers on soles of feet
    • Eye damage in severe cases

    Treatment

    • Multi-Drug Therapy (MDT) provided free worldwide by WHO.
    • Combination of medicines:
      • Rifampicin
      • Dapsone
      • Clofazimine
    • 100% curable if treated early.
    • Early treatment prevents disability.
    [2014] Consider the following diseases: Diphtheria  Chickenpox  Smallpox Which of the above diseases has/have been eradicated in India? (a) 1 and 2 only  (b) 3 only  (c) 1, 2 and 3 only  (d) None of the above