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Subject: Science and Technology

  • GRAPES-3: A Cosmic-Ray Tracker

    Why in the news?

    Researchers from India and Japan used the Gamma Ray Astronomy PeV EnergieS phase-3 (GRAPES-3) telescope to analyse 22 years of muon data, enabling real-time monitoring of changes in the Earth’s upper atmosphere.

    What is GRAPES-3?

    • GRAPES-3 (Gamma Ray Astronomy PeV EnergieS phase-3) is a muon telescope and cosmic-ray observatory located at Ooty, Tamil Nadu.
    • It detects muons, rather than visible light.
    • It is designed to study Cosmic rays, Solar magnetic fields, Space weather, and Atmospheric processes.

    What are Muons?

    • Muons are high-energy subatomic particles produced when cosmic rays collide with atoms in the Earth’s upper atmosphere.
    • They can penetrate deep into the Earth’s surface due to their high energy.

    How does GRAPES-3 Work?

    • Comprises 16 detector modules.
    • Each module contains 232 proportional counters filled with argon-methane gas and a tungsten wire.
    • Passing muons generate electrical pulses, recorded as “hits.”
    • Four layers of detectors arranged at right angles help determine the trajectory and angle of incoming muons.
    • Reinforced concrete layers filter out low-energy particles, allowing only high-energy muons to be detected.

    Significance

    • Enables real-time monitoring of upper atmospheric temperature changes.
    • Helps study the Sun’s magnetic field and space weather.
    • Improves understanding of cosmic-ray interactions with Earth’s atmosphere.
    • Contributes to research in astroparticle physics and atmospheric science.

    Value Addition

    • Cosmic Rays: High-energy charged particles originating from outer space.
    • Space Weather: Variations in the space environment caused by solar activity that can affect satellites, communication systems, and power grids.

    [2017] The terms ‘Event Horizon’, ‘Singularity’, ‘String Theory’ and ‘Standard Model’ are sometimes seen in the news in the context of

    [A] Observation and understanding of the Universe

    [B] Study of the solar and the lunar eclipses

    [C] Placing satellites in the orbit of the Earth

    [D] Origin and evolution of living organisms on the earth

  • Drone revolution and modern warfare

    Why in the News?

    The Ukraine War, the Israel-Hezbollah conflict, and broader West Asian confrontations demonstrate that mass-produced unmanned aerial systems (UAS) have become central to modern warfare. For the first time, relatively inexpensive, commercially derived drones have challenged the dominance of traditional military platforms such as tanks, artillery, combat aircraft, and precision-guided missile systems.

    Why has the traditional model of military superiority been challenged?

    1. Conventional Military Paradigm: Battlefield superiority historically depended on combat aircraft, tanks, artillery, warships, air-defence systems, precision-guided missiles, and advanced intelligence networks.
    2. Resource Advantage: Large military budgets enabled technologically advanced states to dominate battlefields.
    3. Asymmetric Warfare: Smaller states and non-state actors relied on guerrilla tactics, ambushes, and unconventional warfare to offset conventional disadvantages.
    4. Paradigm Shift: Commercially derived drones have disrupted this model by providing low-cost precision strike capabilities at scale.
    5. Persistent Battlespace: Modern battlefields no longer provide safe rear areas as drones can detect, track, and engage targets across the operational depth.

    How has the Ukraine War become the laboratory of industrial-scale drone warfare?

    1. Rapid Adaptation: Ukraine converted commercially available drones originally designed for photography, mapping, and surveillance into military platforms.
    2. Transformation of Role: Drones evolved from intelligence-gathering tools into active strike systems.
    3. Full Integration: By 2024, drones became integrated across almost every layer of Ukrainian combat operations.
    4. Operational Functions: Drones support battlefield surveillance, frontline targeting, artillery correction, logistics interdiction, and deep-strike missions.
    5. Replication Effect: Ukraine’s drone warfare model has subsequently influenced conflicts across West Asia.
    6. Historic First: Ukraine represents the world’s first industrial-scale, drone-intensive conflict.

    How did FPV drones revolutionise battlefield operations?

    First-Person View (FPV) drones allow you to fly while wearing specialized video goggles that stream a live, real-time feed directly from the drone’s onboard camera. Unlike standard camera drones that fly via GPS stabilization, FPV flying offers total acrobatic freedom and an immersive, cockpit-like experience.

    1. FPV (First Person View) Technology: Uses onboard cameras transmitting live video feeds to operators through virtual-reality-style goggles.
    2. Operational Advantage: Ensures precision, manoeuvrability, responsiveness, and low operational costs.
    3. Combat Variants: Includes strike drones, bombers, interceptors, and long-range attack systems.
    4. Cost Asymmetry: Systems costing only a few hundred dollars can destroy armoured vehicles and equipment worth millions.
    5. Expanded Combat Envelope: Thermal-imaging and night-vision variants enable round-the-clock operations.
    • Examples
      • Vampire Hexacopter (“Baba Yaga”): Heavy-lift drone used for combat missions.
      • FPV Kamikaze Drones: Quadcopters carrying explosive payloads such as: Rocket-propelled grenade (RPG) warheads. and Purpose-built munitions.

        How has Ukraine developed a layered drone ecosystem?

        1. Loitering Munitions
          1. RAM II: Short-range precision loitering munition used alongside reconnaissance drones.
          2. UJ-31 Zozulya: Aerially deployed “parasite drone” carried by the UJ-22 Airborne UAV to extend operational reach.
        2. Reconnaissance Systems
          1. Shark Drone: Provides reconnaissance support.
          2. PD-2: Supports surveillance and targeting missions.
        3. Bomber Drones
          1. DJI Mavic 3 Adaptations: Converted from civilian applications to military bomber roles.
          2. DJI Matrice 300 RTK Adaptations: Modified to carry Grenades, Anti-tank mines and Other munitions.
          3. Operational Benefit: Survive missions and conduct multiple sorties unlike kamikaze drones.
        4. Deep Strike Systems
          1. Pegasus FPV Strike Drone: Supports tactical strike operations.
          2. One-Way Attack Drones: Conduct deep strikes against:
            1. Logistics hubs.
            2. Airbases.
            3. Critical infrastructure.
        5. Parasite Drone Concept: UJ-31 Zozulya is carried by the UJ-22 Airborne UAV and released mid-air, extending operational range and penetration capability.

        Why are fibre-optic drones considered a major battlefield innovation?

        A fiber-optic drone is an unmanned aerial vehicle (UAV) that tethers to a ground controller via a thin, hair-like optical fiber cable. Deployed primarily as first-person view (FPV) loitering munitions or reconnaissance craft, they transmit control signals and high-bandwidth video through light, rendering them completely immune to electronic warfare (EW) jamming.

        1. Electronic Warfare Resistance: Conventional drones rely on radio-frequency links vulnerable to jamming.
        2. Fibre-Optic Guidance: Uses physical fibre-optic cables spooled during flight.
        3. Reduced Vulnerability: Ensures mission continuity despite electronic warfare interference.
        4. Operational Advantage: Enables operations in heavily contested electromagnetic environments.
        5. Strategic Significance: Restores drone effectiveness where conventional systems would fail.

        How does Hezbollah employ drones in its military strategy?

        Iranian Supply Chain: Relies heavily on Iranian-origin drone platforms.

        Key Platforms

        1. Ababil Series: Supports ISR and strike missions.
        2. Mohajer Series: Provides medium-range reconnaissance capabilities.
        3. Shahed Series: Performs surveillance and attack functions.

        Specific Systems

        1. Mohajer-4: Provides ISR coverage.
        2. Shahed-129: Supports medium- to long-range ISR missions.
        3. Shahed-136: Functions as a dedicated one-way strike loitering munition.

        Technological Adaptation

        1. Fibre-Optic FPV Drones: Adopted to overcome Israeli electronic warfare measures.

        How has Israel responded to the drone challenge?

        1. Layered Counter-Drone Architecture
          1. Electronic Warfare Systems: Supports drone detection and disruption.
          2. Specialised Radar Arrays: Improves low-altitude drone tracking.
        2. Emerging Technologies/AI-Enabled Iron Drone Raider:
          1. Neutralises drones through kinetic interception.
          2. Uses net capture mechanisms.
          3. Employs direct collision tactics.
          4. Reduces reliance on expensive missile interceptors.
        3. Integrated UAV Force Structure
          1. Heron Systems: Provide long-endurance ISR coverage.
          2. Armed Drones: Support precision strike missions.
          3. Loitering Munitions: Enable rapid reconnaissance-strike integration.

        How does Iran represent a distinct model of drone warfare?

        1. Strategic Integration: Uses drones as instruments of national deterrence and power projection, not merely battlefield weapons.
        2. Proxy Warfare Network: Supplies drone capabilities to allies and proxy groups across Iraq, Syria, Lebanon, and Yemen.
        3. IRGC-Led Doctrine: Integrates drone development and deployment into the Islamic Revolutionary Guard Corps’ military strategy.
        4. Indigenous Production: Manufactures Shahed-series drones domestically, ensuring scalability and strategic autonomy.
        5. Low-Cost Regional Influence: Projects military power and threatens adversary assets across West Asia without maintaining expensive conventional air forces.

        Why is the drone revolution fundamentally an economic revolution?

        1. Cost Efficiency: Cheap unmanned systems replace expensive military platforms.
        2. Production Scale: Industrial manufacturing capacity increasingly determines battlefield success.
        3. Attrition Advantage: Large-scale drone production offsets losses.
        4. Battlefield Economics: Few hundred-dollar drones can destroy million-dollar platforms.
        5. Industrial Endurance: Success depends on continuous production and adaptation.
        6. Technological Adaptability: Drone systems are rapidly reconfigured for evolving battlefield requirements.

        Conclusion

        Modern warfare is transitioning from a platform-centric model to a drone-centric ecosystem characterised by low-cost precision, continuous reconnaissance, and rapid innovation. As drones become central to deterrence, power projection, and battlefield operations, military advantage will increasingly depend on the ability to build, deploy, adapt, and neutralise unmanned systems at scale.

        Value Addition

        Revolution in Military Affairs (RMA)

        1. Integration of emerging technologies into warfare.
        2. Alters doctrine, force structure, and operational concepts.
        3. Comparable to:
          1. Gunpowder Revolution.
          2. Mechanised Warfare.
          3. Nuclear Revolution.
          4. Information Warfare.

        Emerging Technologies in Warfare

        Artificial Intelligence

        1. Autonomous targeting.
        2. Swarm coordination.
        3. Decision support systems.

        Electronic Warfare

        1. Jamming.
        2. Spoofing.
        3. Signal disruption.

        Autonomous Systems

        1. Loitering munitions.
        2. Unmanned combat aerial vehicles.

        Network-Centric Warfare

        1. Real-time ISR integration.
        2. Sensor-to-shooter connectivity.

        PYQ Relevance

        [UPSC 2023] The use of unmanned aerial vehicles (UAVs) by our adversaries across the borders to ferry arms/ammunitions, drugs, etc., is a serious threat to internal security. Comment on the measures being taken to tackle this threat.

        Linkage: The PYQ examines the security implications of the growing use of drone technology. The article discusses how drones have become central to modern warfare, highlighting the need for advanced counter-drone capabilities to address emerging military and internal security threats.

      1. 12 Years of India’s Scientific Transformation

        Why in the news?

        Union Minister Jitendra Singh highlighted the major achievements of India’s science and technology ecosystem over the last 12 years.

        Bioeconomy Growth

        • India’s bioeconomy expanded from about USD 10 billion (2014) to over USD 190 billion (2026).
        • Target: USD 300 billion by 2030.
        • Growth driven by innovations in Biotechnology, Genomics, Diagnostics, and Biopharmaceuticals.
        • Supported by the BioE3 Policy Framework.

        Space Sector Achievements

        • Space economy grew to around USD 8 billion and is projected to reach USD 45 billion in the next decade.
        • Space startups increased from single digits to over 400.
        • Major milestones: Chandrayaan-3 became the first mission to land near the Moon’s south pole. Gaganyaan preparations underway.
        • Future goals: Bharatiya Antariksh Station by 2035. Indian Moon landing by 2040.

        Weather and Climate Services

        • Weather radars increased from 17 (2014) to nearly 50 operational radars.
        • Another 50 radars planned under Mission Mausam.
        • Forecast coverage expanded from 300 cities to nearly 1,700 locations.
        • Expansion of Lightning detection systems, Rain-monitoring infrastructure, and Nowcast services for short-term forecasts.
        • Mission Mausam: Initiative aimed at strengthening India’s weather forecasting and disaster resilience capabilities through modern observation and prediction systems.

        Biotechnology and Healthcare

        • India emerged as a global biotechnology hub.
        • Advances include Affordable CAR-T cell therapy, Genomics and precision medicine, Next-generation antibiotics, and Indigenous diagnostics and vaccines.
        • India’s COVID-19 vaccines showcased domestic scientific capability.

        CSIR Innovations

        The Council of Scientific and Industrial Research (CSIR) expanded its outreach through:

        • Aroma Mission promoting high-value aromatic crops.
        • Steel slag road technology converting industrial waste into road-building material.
        • Technologies in healthcare, energy, infrastructure, and manufacturing.

        Deep Ocean Technologies

        • Development of Matsya 6000, India’s manned submersible.
        • Development of Varaha, an indigenous deep-sea mining system.

        Major Scientific Initiatives

        • Anusandhan National Research Foundation (ANRF)
        • National Quantum Mission
        • National Supercomputing Mission
        • Research Development and Innovation (RDI) Fund
        • National Geospatial Policy

        Nuclear Energy Reforms

        • Opening of the nuclear energy sector to greater private participation.
        • Expected to boost Investment, Innovation, and Capacity creation.

        [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

      2. DRDO Successfully Flight-Tests Long Range Land Attack Cruise Missile (LRLACM)

        Why in the news?

        The Defence Research and Development Organisation (DRDO) successfully conducted the flight test of the Long Range Land Attack Cruise Missile (LRLACM) from Dr APJ Abdul Kalam Island on 15 June 2026

        About LRLACM

        • LRLACM stands for Long Range Land Attack Cruise Missile.
        • It is an indigenously developed cruise missile.
        • All major subsystems have been developed by DRDO laboratories and Indian industry partners.
        • The Aeronautical Development Establishment (ADE), Bengaluru is the nodal laboratory.

        What is a Cruise Missile?

        • A guided missile that flies within the atmosphere for most of its trajectory.
        • Uses aerodynamic lift and propulsion throughout flight.
        • Designed for high precision strikes against land targets.
        • Generally flies at low altitudes to avoid radar detection.

        Cruise Missile vs Ballistic Missile

        • Cruise missiles: Powered throughout flight and follow a relatively flat trajectory.
        • Ballistic missiles: Powered only during the initial phase and then follow a ballistic path under gravity.

        [2023] Consider the following statements
        1. Ballistic missiles are jet-propelled at subsonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of fight.
        2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.
        Which of the statements given above is/are correct?

        [A] 1 only

        [B] 2 only

        [C] Both 1 and 2

        [D] Neither 1 nor 2

      3. India’s Space Economy Poised to Reach USD 45 Billion

        Why in the news?

        Union Minister Jitendra Singh stated that India’s space economy is expected to grow from USD 8-9 billion to USD 40-45 billion over the next decade, driven by policy reforms, private participation, and innovation.

        Key Highlights

        • India’s space economy is projected to reach USD 40-45 billion in the next decade.
        • The country currently has over 400 space startups, compared to only a handful a few years ago.
        • More than 125 startups and technology innovators participated in the RISE Conclave 2026.

        Factors Driving Growth

        • Liberalisation and reforms in the space sector.
        • Increasing private sector participation.
        • Expansion of the startup ecosystem.
        • Collaboration among industry, academia, and research institutions.
        • Focus on innovation-led growth under the vision of Viksit Bharat 2047.

        India’s Space Achievements

        • Chandrayaan-3 established India among leading space-faring nations.
        • Gaganyaan is India’s upcoming human space mission.
        • India has demonstrated cost-effective execution of complex missions, including the Mars Orbiter Mission.

        Space Technology in Governance

        India is increasingly using space applications for development through:

        • PM Gati Shakti for integrated infrastructure planning.
        • Urban development programmes.
        • Drone-enabled monitoring systems.
        • Project implementation and monitoring.
        • Improved transparency and efficiency in service delivery.

        PSLV Mission Anomaly

        • The analysis of the recent Polar Satellite Launch Vehicle (PSLV) anomaly has been completed.
        • Causes have been identified.
        • Corrective measures have been initiated for future missions.

        RISE Conclave 2026

        • Theme: “Innovation & Entrepreneurship Driven Growth for Viksit Bharat 2047.”
        • Brought together researchers, startups, investors, industry leaders, and policymakers.
        • Showcased innovations in Aerospace technologies, Artificial Intelligence, Deep-tech, and Agri-food technologies.

        [2025] GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?
        I. It is designed to provide additional accuracy and integrity.
        II. It will allow more uniform and high quality air traffic management.
        III. It will provide benefits only in aviation but not in other modes of transportation.
        Select the correct answer using the code given below.

        [A] I, II and III

        [B] II and III only

        [C] I only

        [D] I and II only

      4. Project Kusha: India’s Indigenous Long-Range Air Defence System

        Why in the news?

        Defence Minister Rajnath Singh described Project Kusha as a “game changer” for India’s security architecture and stated that its significance had been demonstrated during Operation Sindoor.

        What is Project Kusha?

        • An indigenous long-range air defence missile system being developed by the Defence Research and Development Organisation (DRDO).
        • Intended to provide a multi-layered air defence shield against diverse aerial threats.
        • Often viewed as India’s indigenous counterpart to advanced systems like the Russian S-400 Triumf.

        Objectives

        • Protect military assets and strategic installations.
        • Defend critical infrastructure and civilian areas.
        • Enhance India’s indigenous air defence capabilities.
        • Strengthen strategic autonomy under the Aatmanirbhar Bharat initiative.

        Threats It Is Expected to Counter

        • Fighter aircraft, Cruise missiles, Ballistic missiles, Drones and UAVs, Precision-guided munitions, and Stand-off weapons

        Mission Sudarshan Chakra

        • Announced by Prime Minister Narendra Modi during the 2025 Independence Day address.
        • Envisages a nationwide multi-layered missile defence shield.
        • Aims to protect: Military establishments, Critical infrastructure, and Civilian population centres.
        • Project Kusha is expected to be an important component of this vision.

        [2018] What is “Terminal High Altitude Area Defense (THAAD)”, sometimes seen in the news?

        [A] An Israeli radar system

        [B] India’s indigenous anti-missile programme

        [C] An American anti-missile system

        [D] A defence collaboration between Japan and South Korea.

      5. Sound Waves for Energy-Efficient Next-Generation Computing

        Why in the news?

        Researchers from the Institute of Nano Science and Technology (INST) have discovered a new mechanism to generate and control spin currents using sound waves, opening avenues for low-power computing, spintronics, and quantum technologies.

        Key Highlights

        • Researchers developed a method to generate magnon-based spin currents using Surface Acoustic Waves (SAWs).
        • The study was published in Physical Review B.
        • It offers a pathway towards Energy-efficient electronics, Quantum computing, Next-generation communication technologies.

        Why is this Important?

        • Limitations of Conventional Electronics: Traditional electronics use: Movement of electric charge (electrons)
        • Problems: Heat generation, Energy loss, Reduced efficiency at smaller scales

        What is Spintronics?

        Spintronics (Spin Electronics) is a technology that uses the Spin of electrons. Along with their charge to process and store information.

        Advantages

        • Lower power consumption.
        • Faster processing speeds.
        • Reduced heat generation.
        • Higher data storage density.

        What are Magnons?

        Magnons are Quanta of spin waves or collective disturbances in the magnetic ordering of a material.

        What are Surface Acoustic Waves (SAWs)?

        Surface Acoustic Waves are Sound waves that travel along the surface of a material.

        Characteristics

        • Cause tiny mechanical vibrations.
        • Commonly used in: Mobile communication filters, Sensors, Signal processing devices.

        [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

      6. Is a text AI-aided? Science, limits of detection tools 

        Why in the News?

        Allegations of AI-generated writing surfaced after three winners of the Commonwealth Short Story Prize were flagged by AI-detection tools, including Pangram, which classified one story as “100% AI-generated.” The controversy has reignited debate over whether AI detectors can reliably distinguish human-written content from AI-generated text. 

        Why is the Human vs AI Binary Becoming Obsolete?

        1. Collaboration Model: Increasingly, writing exists on a spectrum ranging from fully human-written to AI-assisted and heavily AI-generated.
        2. Hybrid Authorship: Writers often use AI for brainstorming, editing, structuring, or refining content.
        3. Future Challenge: Determining acceptable levels of AI assistance may become more important than identifying AI use itself.
        4. Example: The article cites categories such as lightly assisted, moderately assisted, and heavily assisted writing

        What is the machine learning foundation behind AI detection?

        1. Machine Learning (ML): Uses large datasets and statistical patterns to train systems to distinguish AI-generated text from human-written text.
        2. Training Data: Requires massive datasets containing both AI-generated and human-written content.
        3. Pattern Recognition: Learns recurring features such as vocabulary, sentence structure, punctuation, and stylistic patterns.
        4. Classification Function: Assigns probability scores indicating whether content appears AI-generated or human-authored.
        5. Example: Models may learn that AI systems frequently use formal verbs such as “delve”, “imperative”, or “devolve”.

        How are AI detectors trained to recognise AI-generated writing?

        1. Dataset Feeding: Large volumes of labelled human and AI text are fed into detection models.
        2. Statistical Learning: Models identify correlations and recurring linguistic features.
        3. Annotation-Based Training: Human annotators and data vendors classify examples to create training datasets.
        4. Behavioural Modelling: Since many frontier AI systems are trained on internet text, detectors attempt to identify common writing behaviours reproduced by these systems.
        5. Industry Dependence: Most training datasets are created by large technology firms, researchers, and annotation platforms.

        How is AI Detection Different from Plagiarism Detection?

        1. Plagiarism Detection: Identifies copied content by matching text with existing sources.
        2. AI Detection: Attempts to infer whether a text resembles AI-generated writing based on statistical patterns.
        3. Key Difference: AI detection relies on probability, whereas plagiarism detection relies on direct textual matches

        Linguistic signals that AI detectors rely upon

        Which ‘AI tells’ are commonly identified by detectors?

        1. Uncommon Vocabulary: Frequent use of words and phrases rarely encountered in ordinary conversation.
        2. Dash Usage: Excessive use of em dashes (—), often highlighted as a stylistic indicator.
        3. Structured Formatting: Frequent use of bullet points accompanied by descriptive headings.
        4. Neat Conclusions: Tendency to end content with highly organised summary paragraphs.
        5. Negative Parallelism: Repeated rhetorical structures such as “Not X, but Y.”
          1. Example: “These headphones are not just hearing devices, but sound-cancelling devices.”

        Why are these indicators not reliable proof of AI authorship?

        1. Overlap of Styles: Human writers can naturally employ the same stylistic features.
        2. Professional Writing Norms: Academic and journalistic writing often uses structured formatting and formal language.
        3. False Attribution Risk: Presence of a pattern does not establish authorship.
        4. Statistical Nature: Detection relies on probabilities rather than certainty.

        What are the inherent limitations of AI detectors?

        1. Low-Entropy Text: Text that is highly predictable and information-poor provides fewer linguistic signals, making AI detection less accurate.
          1. Example: Short responses, formulaic writing, or heavily edited text may be difficult to classify reliably
        2. Insufficient Signals: Short or highly edited content may not contain enough indicators for reliable classification.
        3. Probability-Based Judgments: Models provide likelihood estimates rather than definitive proof.
        4. Absence of Ground Truth: Detectors cannot directly observe whether a human or AI produced the text.
        5. Generalisation Problem: If a detector has not been specifically trained on outputs from a model such as Claude, it can only make an educated guess rather than a definitive classification.
        6. Implication: Detection tools struggle to keep pace with rapidly evolving AI models.

        How does editing affect detection accuracy?

        1. Mixed Authorship Challenge: Human-written text edited by AI, or AI-generated text edited by humans, creates ambiguity.
        2. Slight Modifications: Even limited editing can alter detectable patterns.
        3. False Positives: Human-written content may be incorrectly flagged as AI-generated.
        4. False Negatives: AI-generated content may evade detection after revision.

        Reliability of current AI-detection technologies

        Can AI detectors provide definitive evidence of AI use?

        1. False Positive Rate: Pangram reports a false-positive rate of 0.01%, equivalent to 1 error per 10,000 cases.
        2. Independent Validation: The figure has reportedly been supported by some independent studies.
        3. Operational Reliability: Suitable for risk assessment but not for conclusive judgment.
        4. Expert Assessment: Developers acknowledge that models cannot achieve 100% accuracy.

        Why is perfect detection technologically difficult?

        1. Continuous AI Evolution: New language models constantly improve linguistic sophistication.
        2. Human-AI Convergence: AI-generated text increasingly resembles human writing.
        3. Spam Detection Analogy: Similar to email spam filters, detection systems reduce risk but cannot eliminate errors.
        4. Adaptive Behaviour: AI systems learn to avoid patterns commonly targeted by detectors.

        Implications for writers and publishers

        How can false positives affect genuine authors?

        1. Reputational Damage: Writers may face allegations despite producing original work.
        2. Creative Discouragement: Fear of misclassification may discourage experimentation in writing styles.
        3. Publishing Risks: Manuscripts may be rejected based on uncertain evidence.
        4. Trust Deficit: Excessive dependence on detection tools can undermine confidence in evaluation systems.

        What challenges do publishers face in the AI era?

        1. Verification Difficulty: Establishing authorship becomes increasingly complex.
        2. Transparency Requirements: Growing demand for disclosure regarding AI assistance.
        3. Editorial Standards: Need for clear policies defining acceptable AI use.
        4. Reader Trust: Publishers must maintain credibility while adapting to technological change.

        Should AI assistance be treated differently from AI authorship?

        1. Spectrum of Use: Writing may be fully human-written, AI-assisted, moderately AI-assisted, or heavily AI-generated
        2. Collaborative Creation: Many authors increasingly use AI for brainstorming, editing, and research assistance.
        3. Policy Challenge: Institutions must determine acceptable levels of AI involvement.
        4. Binary Classification Problem: Human-versus-AI framing often oversimplifies modern writing practices.

        How does the issue intersect with ethics and regulation?

        1. Accountability: Establishes responsibility for content creation and originality.
        2. Intellectual Property: Raises questions regarding ownership of AI-assisted works.
        3. Academic Integrity: Challenges traditional plagiarism and authorship norms.
        4. Due Process: Prevents punitive actions based solely on probabilistic detection tools.Transparency: Encourages disclosure-based approaches rather than purely detection-based approaches.

        Should Transparency Replace Detection as the Primary Governance Tool?

        1. Disclosure-Based Regulation: Encourages authors to declare AI use.
        2. Reduced False Accusations: Minimises harm caused by false positives.
        3. Practical Governance: More feasible than attempting perfect detection.
        4. Institutional Trust: Builds confidence among publishers, educators, and readers.

        Conclusion

        AI-detection tools can serve as useful indicators but not definitive arbiters of authorship. The future of AI governance in publishing and academia will depend less on achieving perfect detection and more on developing credible standards for disclosure, accountability, and ethical human-AI collaboration.

        Value Addition

        AI Governance Frameworks

        UNESCO Recommendation on the Ethics of AI (2021)

        1. Promotes transparency, accountability, fairness, and human oversight.
        2. Calls for responsible deployment of AI technologies.

        OECD AI Principles

        1. Supports trustworthy AI.
        2. Emphasises explainability and human-centric design.

        G7 Hiroshima AI Process

        1. Develops international guardrails for advanced AI systems.
        2. Focuses on safety, transparency, and risk management.

        EU AI Act

        1. Adopts a risk-based regulatory framework.
        2. Imposes transparency obligations for certain AI applications.

        AI and India

        IndiaAI Mission

        1. Strengthens domestic AI capabilities.
        2. Supports compute infrastructure, datasets, innovation, and skill development.

        Digital Personal Data Protection Act, 2023

        1. Provides safeguards for personal data used in AI ecosystems.

        National Strategy for Artificial Intelligence

        1. Identifies AI applications in education, healthcare, agriculture, smart mobility, and governance.

        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 PYQ examines the opportunities and challenges associated with Artificial Intelligence and its growing societal impact. The article highlights the limitations of AI systems and the need for transparency, accountability, and responsible AI governance.

      7. 100 Years of Solar Data Reveal Clues About Sun’s Activity Cycle

        Why in News?

        Scientists from Indian Institute of Astrophysics used over 100 years of observations from Kodaikanal Solar Observatory to study how convection patterns on the Sun are linked to the 11-year solar activity cycle.

        Key Highlights

        • Study based on: More than 34,000 Ca II K solar images.
        • Published in: Astrophysical Journal Letters.
        • Researchers examined:
          • Lane widths
          • Intensities
          • Their relation with sunspot numbers and solar cycles.

        Note: The 34,000 Ca II K solar images mean a historic, 100-year-old archive of solar photographs from India’s Kodaikanal Solar Observatory that scientists recently digitized and used to solve mysteries about the Sun’s 11-year magnetic cycle.

        What are Supergranulations?

        • Large-scale convection patterns on the Sun’s surface.
        • Form network-like structures on the solar surface.

        Features

        • Average lifetime: Around 24 hours.
        • Average size: About 30,000 km.
        • Cooler intergranular lane width: Around 6,000 km.

        Note: An intergranular lane is the darker, cooler region found between bright granules (bright cellular structures visible on the Sun’s surface) on the Sun’s surface.

        Major Findings

        Correlation with Solar Cycle

        • Lane widths and intensities strongly correlate with Sunspot activity.

        Latitude Dependence

        • Strongest correlations observed around ±11° to ±22° latitudes.
        • Peak lane-width correlation 18°N and 20°S.
        • Peak intensity correlation 13°N and 14°S.

        Time Lag

        • Lane width correlations peak:
          • During solar maximum.
        • Intensity correlations peak:
          • 1.25 to 1.5 years after solar maximum.
        • Lag varies with latitude:
          • Near zero around ±20°.
          • Increases toward equator.

        Significance of Study

        • Helps understand:
          • Solar dynamics
          • Magnetic flux transport
          • Solar irradiance variations.
        • Important for:
          • Future solar cycle prediction.
          • Understanding UV radiation changes from the Sun.
        • Confirms:
          • Supergranular properties are influenced by solar magnetic activity.

        About Kodaikanal Solar Observatory

        • Located in: Kodaikanal.
        • Known for: One of the world’s longest continuous solar observation datasets.
        • Operated by: Indian Institute of Astrophysics.

        About Solar Cycle

        • The Sun undergoes an approximately: 11-year cycle of magnetic activity.
        • Characterized by variation in:
          • Sunspots
          • Solar flares
          • Solar radiation.
        • Solar maximum: Period of highest solar activity.
        • Solar minimum: Period of lowest solar activity.

        [2022] If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth?:
        1. GPS and navigation systems could fail.
        2. Tsunamis could occur at equatorial regions.
        3. Power grids could be damaged.
        4. Intense auroras could occur over much of the Earth.
        5. Forest fires could take place over much of the planet.
        6. Orbits of the satellites could be disturbed
        7. Shortwave radio communication of the aircraft flying over polar regions could be interrupted.
        Select the correct answer using the code given below;

        [A] 1, 2, 4 and 5 only

        [B] 2, 3, 5, 6 and 7 only

        [C] 1, 3, 4, 6 and 7 only

        [D] 1, 2, 3, 4, 5, 6 and

      8. Catalyst that Transforms to Perform

        Why in the news?

        Scientists from the Centre for Nano and Soft Matter Sciences and collaborating institutions discovered how a catalyst changes its structure during water electrolysis for green hydrogen production. The study was published in Materials Horizons.

        Key Highlights

        • Researchers studied:
          • Molybdenum carbide (Mo₂C), an earth-abundant catalyst used in hydrogen production.
        • Molybdenum Carbide is a compound made of molybdenum and carbon that acts as an efficient catalyst in hydrogen production and other industrial chemical reactions
        • Key Features
          • Considered an earth-abundant catalyst because molybdenum is more available and cheaper than precious metals like platinum.
          • Exhibits platinum-like catalytic properties in some reactions.
          • Has high thermal stability and good electrical conductivity.
        • Role in Hydrogen Production
          • Mo₂C is widely studied for: Hydrogen Evolution Reaction (HER) in water splitting.
          • Electrochemical production of green hydrogen.
          • Improving efficiency while reducing dependence on expensive noble-metal catalysts.

        About Hydrogen Evolution Reaction (HER)

        • HER is the electrochemical reaction where hydrogen gas is produced from water during electrolysis.
        • It occurs at the cathode. (The cathode is the electrode where reduction occurs and hydrogen gas is produced.)
          • Note: Anode: The anode is the electrode where oxidation occurs. In water electrolysis, oxygen is produced at the anode through the Oxygen Evolution Reaction (OER).
        • Efficient catalysts are required to reduce energy consumption and improve hydrogen production efficiency.

        About Green Hydrogen

        • Green hydrogen is hydrogen produced using renewable energy sources through electrolysis of water.
        • It is considered a clean fuel because it emits no carbon dioxide during use.

        [2023] With reference to green hydrogen, consider the following statements:
        1. It can be used directly as a fuel for internal combustion.
        2. It can be blended with natural gas and used as fuel for heat or power generation.
        3. It can be used in the hydrogen fuel cell to run vehicles.
        How many of the above statements are correct?

        [A] Only one

        [B] Only two

        [C] All three

        [D] None