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GS Paper: GS3

  • National IED Data Management System (NIDMS)  

    Why in the News?

    Union Home Minister Amit Shah virtually inaugurated the National IED Data Management System (NIDMS) at the National Security Guard garrison in Manesar, calling it a next generation shield against terrorism.

    What is NIDMS

    • A national online digital platform and centralised repository of data related to Improvised Explosive Device (IED) incidents
    • Designed to support investigation, pattern analysis, and deterrence strategies against terror attacks
    • Provides single click access to IED related data across India
    • Nodal Agency: National Security Guard (NSG)
    • Launched by the Ministry of Home Affairs

    Key Objectives

    • Strengthen counter terrorism investigations
    • Identify patterns in modus operandi and explosives
    • Enable scientific and evidence based prosecution
    • Improve inter agency coordination

    Key Features

    • Two way data platform
      • Agencies can upload fresh IED incident data
      • Agencies can access historical data
    • Comprehensive database: Chronicles all bomb blasts since 1999
    • One nation one data repository: Uniform access for central and state agencies
    • Fully secure national digital platform
    • Enables standardisation, integration, and secure sharing of IED data

    Agencies Covered

    • National Investigation Agency
    • State Anti Terrorism Squads
    • Central Armed Police Forces
    • State and Union Territory police forces
    • Intelligence and investigation agencies

    Integration with Other Security Databases

    NIDMS will interlink with existing national security platforms:

    • CCTNS connecting over 17,700 police stations
    • ICJS 2 integrating data from 22,000 courts
    • e Prisons database with over 2.2 crore prisoners
    • e Prosecution database with around 2 crore cases
    • e Forensics with more than 31 lakh samples
    • NAFIS with over 1.2 crore fingerprints
    [2020] In India, the term “Public Key Infrastructure” is used in the context of: 

    (a) Digital security infrastructure 

    (b) Food security infrastructure 

    (c) Health care and education infrastructure 

    (d) Telecommunication and transportation infrastructure

  • Vehicle-to-Vehicle Communication Technology 

    Why in the News?

    The Government of India is preparing to roll out Vehicle To Vehicle (V2V) communication technology by the end of 2026 to significantly reduce road accidents, especially during fog, rear end collisions, and pile ups.

    What is Vehicle To Vehicle (V2V) Technology

    • A direct communication system that allows vehicles to exchange information with each other
    • Works without mobile network or internet
    • Vehicles send and receive real time safety alerts when another vehicle comes dangerously close
    • Nodal Ministry: Ministry of Road Transport and Highways

    How the V2V System Works

    • A SIM like communication device installed inside vehicles
    • Vehicles broadcast signals about: Speed, Position, Direction and Sudden braking
    • Nearby vehicles receive instant alerts and warn drivers

    Key Features

    • 360 degree communication: Alerts received from all sides of the vehicle
    • Distance warning system: Warns drivers if another vehicle comes too close
    • Stationary vehicle detection: Alerts about parked or broken down vehicles on roads
    • Fog safety: Highly effective during low visibility conditions
    • Pile up prevention: Reduces chances of multi vehicle collisions on highways
    [2023] Consider the following actions: 

    1. Detection of car crash/collision which results in the deployment of airbags almost instantaneously 

    2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive

    3. Detection of the tilt of the smart phone which results in the rotation of display between portrait and landscape mode 

    In how many of the above actions is the function of accelerometer required? 

    (a) Only one (b) Only two (c) All three (d) None

  • District Led Textiles Transformation (DLTT) Plan

    Why in the News?

    The Ministry of Textiles has launched the District Led Textiles Transformation (DLTT) Plan to convert 100 high potential districts into Global Export Champions and upgrade 100 Aspirational Districts into self reliant textile hubs.

    What is the DLTT Plan

    • A sector specific, district level transformation strategy for textiles
    • Uses data driven categorisation to tailor interventions
    • Covers districts at different stages, from advanced export clusters to foundation stage districts

    Objectives

    • Drive inclusive, sustainable, and export oriented growth in textiles
    • Decentralise policy execution to districts
    • Strengthen MSMEs and formalise the workforce
    • Build globally competitive textile clusters

    Significance

    • Moves India up the textile value chain
    • Diversifies export baskets
    • Strengthens MSMEs and formalises labour
    • Boosts women led and SHG led enterprises
    • Accelerates development in aspirational, eastern, and north eastern districts

    Prelims Pointers

    • DLTT follows a district first approach
    • Uses data driven classification
    • Integrates skilling, infrastructure, and exports
    • Strong focus on inclusive and regional development
    [2022] Which of the following activities constitute the real sector in the economy? 

    1. Farmers harvesting their crops 2. Textile mills converting raw cotton into fabrics 

    2. A commercial bank lending money to a trading company 

    3. A corporate body issuing Rupee Denominated Bonds overseas 

    Select the correct answer using the code given below: 

    (a) 1 and 2 only (b) 2, 3 and 4 only (c) 1, 3 and 4 only (d) 1, 2, 3 and 4

  • Dust Experiment (DEX) 

    Why in the News?

    Indian Space Research Organisation has confirmed that an interplanetary dust particle enters Earth’s atmosphere roughly every 16 minutes, based on observations from India’s first cosmic dust detector Dust Experiment (DEX).

    About Dust Experiment (DEX)

    • India’s first indigenously developed cosmic dust detector
    • Designed to detect and measure high speed interplanetary and orbital dust particles
    • Studies dust impacts in Earth’s upper atmosphere

    Developed by

    • Indian Space Research Organisation
    • Physical Research Laboratory, Ahmedabad

    Mission Platform

    • Flown aboard PSLV Orbital Experimental Module (POEM)
    • Part of PSLV C58 XPoSat mission

    Aim

    • Direct measurement of cosmic dust flux
    • Improve understanding of space environment
    • Enhance satellite safety and planning of future crewed deep space missions

    Prelims Pointers

    • DEX is India’s first cosmic dust detector
    • Operates from PSLV POEM
    • Measures interplanetary dust particles
    • IDPs originate from comets and asteroids
    • Critical for satellite protection and deep space missions
    [2011] What is the difference between asteroids and comets? 

    1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material

    2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury

    3. Comets show a perceptible glowing tail, while asteroids do not. 

    Which of the statements given above is/are correct? 

    (a) 1 and 2 only (b) 1 and 3 only (c) 3 only (d) 1, 2 and 3

  • Spina Bifida in India  

    Why in the News?

    India continues to report one of the highest global burdens of Spina Bifida, despite strong scientific evidence that pre conception folic acid intake can prevent more than 70 percent of cases.

    What is Spina Bifida

    • A congenital neural tube defect
    • Occurs when the spinal cord and its protective coverings fail to develop properly
    • Develops during early pregnancy, usually within the first 28 days after conception
    • Leads to lifelong disability of varying severity
    • Non communicable and Non infectious

    Causes

    • Caused by abnormal closure of the neural tube
    • Inadequate folic acid intake before and during early pregnancy
    • Poor maternal nutrition and anaemia
    • Unplanned pregnancies without micronutrient supplementation
    • Possible genetic susceptibility combined with environmental factors

    Treatment and Management

    • Early surgical repair: Closure of the spinal defect soon after birth to prevent infection
    • Hydrocephalus management: Use of ventriculo peritoneal shunt to drain excess fluid
    • Rehabilitation care: Long term physiotherapy and occupational therapy
    • Orthopaedic interventions: Corrective surgeries, braces or casts for skeletal deformities

    Prevention

    • Daily folic acid supplementation before conception and during early pregnancy
    • Food fortification and maternal nutrition programmes
    • Awareness about planned pregnancies
    • Integration with maternal health schemes

    Prelims Pointers

    • Spina bifida is a neural tube defect
    • Neural tube closes within 28 days of conception
    • Folic acid deficiency is the most important risk factor
    • Prevention is more effective than post birth treatment
    [2023] Consider the following statements in the context of interventions being undertaken under Anaemia Mukt Bharat Strategy: 

    1. It provides prophylactic calcium supplementation for pre-school children, adolescents and pregnant women. 

    2. It runs a campaign for delayed cord clamping at the time of child-birth

    3. It provides for periodic deworming to children and adolescents

    4. It addresses non-nutritional causes of anaemia in endemic pockets with special focus on malaria, hemoglobinopathies and fluorosis. 

    How many of the statements given above are correct? 

    (a) Only one (b) Only two (c) Only three (d) All four

  • [9th January 2026] The Hindu OpED: GSDP share as criterion for central-State transfers

    PYQ Relevance

    [UPSC 2020] Explain the rationale behind the Goods and Services Tax (Compensation to States) Act, 2017. How has COVID-19 impacted the GST compensation fund and created new federal tensions?

    Linkage: COVID-19 exposed structural weaknesses in the GST compensation mechanism.

    This intensified Centre-State fiscal tensions and revived debates on fair and transparent transfer mechanisms in India’s federal framework.

    Mentor’s Comment

    Debates on fiscal federalism in India often oscillate between equity and efficiency. The article examines whether Gross State Domestic Product (GSDP) can be a fair and reliable basis for sharing Central tax revenues among States, especially in the post-GST era where tax attribution has become complex.

    Why in the News

    The article gains significance amid ongoing debates on Central-State fiscal relations, especially after the implementation of GST, which has weakened the direct link between tax collection and the place of economic activity. The issue is critical because ₹75.12 lakh crore was transferred to States between 2020-21 and 2024-25, and the method used to distribute this amount affects State fiscal autonomy and perceived fairness. A key finding is the very high correlation (0.99) between actual transfers and GSDP, compared to a much weaker link with Finance Commission devolution, making GSDP a stronger alternative measure.

    Introduction

    India’s system of fiscal transfers relies heavily on the recommendations of successive Finance Commissions, which distribute Central tax revenues through tax devolution, grants-in-aid, and Centrally Sponsored Schemes (CSS). However, the post-GST tax regime has disrupted the traditional linkage between tax collection location and economic value creation, raising questions about whether existing criteria adequately capture States’ real contribution to national revenues.

    Why is tax collection an unreliable indicator of State-level contribution?

    1. GST structure: Breaks the link between the location of production and the location of tax collection due to destination-based taxation.
    2. Corporate taxation: Attributes tax payments to the registered office location rather than where economic activity occurs.
    3. Multi-State operations: Dilutes State-wise attribution due to labour migration, inter-State supply chains, and inter-corporate transactions.
    4. Example distortion: Automobile manufacturers pay taxes where offices are registered, not necessarily where factories operate; plantation companies record profits centrally despite dispersed production.
    5. Outcome: Direct tax figures reflect collection points, not value creation.

    Why does GSDP emerge as a credible proxy for tax accrual?

    1. Economic base representation: Captures the size and intensity of economic activity within a State.
    2. Uniform tax base assumption: Assumes broadly similar tax administration efficiency across States.
    3. Empirical validation: Correlation between GSDP and GST collections stands at 0.75 for 2023-24.
    4. High correlation with transfers: Correlation of 0.91 between GSDP and total Central tax transfers.
    5. Policy neutrality: Avoids contentious attribution disputes inherent in GST accounting.

    How do actual transfers align with GSDP shares?

    1. Overall transfers: ₹75.12 lakh crore transferred during 2020-25, including FC devolution, grants, and CSS.
    2. High-alignment States:
      1. Uttar Pradesh: 15.81% transfer share vs 16.85% population share.
      2. Maharashtra: High tax contribution (40.3%) but only 6.64% of transfers, reflecting redistribution.
    3. Mismatch States:
      1. Bihar: Receives 8.65% transfers despite only 4.66% GSDP share.
      2. West Bengal: 6.96% GSDP share vs 6.69% transfers.
    4. Interpretation: Transfers broadly track economic output, not tax collections.

    How does the equity-efficiency trade-off emerge in fiscal transfers?

    1. Redistributive bias: FC criteria prioritize equity over efficiency by favoring population and income distance.
    2. Regional disparities: Persist due to differential expenditure needs and fiscal capacity.
    3. Efficiency trade-off: GSDP-based transfers better reflect contribution but reduce redistributive scope.
    4. Evidence: Correlation between GSDP and FC devolution shares is only 0.58, indicating weak alignment.
    5. Outcome: GSDP balances fairness and efficiency more transparently than current metrics.

    Which States gain or lose under a pure GSDP-based system?

    1. Major gainers: Tamil Nadu and Karnataka: High production but lower tax attribution due to GST mechanics.
    2. Major losers: Uttar Pradesh, Bihar, Madhya Pradesh: Benefit currently from redistributive weights.
    3. Exception States: Haryana, Karnataka, Maharashtra: GSDP share lower than tax collection due to tax concentration effects.
    4. Inference: GSDP corrects distortions arising from centralized tax accounting.

    Conclusion

    The debate on using GSDP as a basis for Central-State transfers highlights the need to realign India’s fiscal federal framework with the realities of the post-GST economy. While redistribution remains essential for equity, greater reliance on GSDP can improve transparency, efficiency, and trust by linking transfers more closely with economic activity. A calibrated approach, combining GSDP-based devolution with targeted grants, offers a balanced pathway to strengthen cooperative federalism.

  • ISRO and the next big challenge

    Why in the News

    ISRO’s recent string of successes, routine PSLV launches, Chandrayaan-3’s lunar landing, Aditya-L1’s solar orbit insertion, and the India-US NISAR mission has raised expectations sharply. Now for the first time, India’s challenge is no longer technological proof-of-concept but institutional maturity. Furthermore, India’s space programme is preparing for multiple high-complexity missions in parallel, including Gaganyaan, Chandrayaan-4, and the Next Generation Launch Vehicle (NGLV).

    Why is ISRO’s recent success described as “raising the bar”?

    1. Mission Reliability: Sustained success of the Polar Satellite Launch Vehicle has made reliable access to orbit almost routine.
    2. Planetary Achievement: Chandrayaan-3’s soft landing on the Moon in August 2023 placed India among a small group of lunar-landing nations.
    3. Solar Science Capability: Aditya-L1’s successful halo orbit insertion in January 2024 added a dedicated solar observatory to ISRO’s portfolio.
    4. International Collaboration: Launch of the NASA-ISRO Synthetic Aperture Radar (NISAR) mission demonstrated high-value global scientific cooperation.

    What fundamental shift can be identified in ISRO’s challenge?

    1. Institutional Transition: Moves focus from individual scientific feats to sustained organisational performance.
    2. Parallel Complexity: Requires simultaneous execution of human spaceflight, deep-space missions, and commercial launches.
    3. Expectation Management: Makes failure costlier as public, political, and international scrutiny increases.

    How does mission parallelisation strain ISRO’s existing systems

    1. Human Spaceflight Load: Gaganyaan preparation consumes engineering, testing, and safety-certification bandwidth.
    2. Science Programme Pressure: Planetary, solar, and Earth-observation missions compete for limited skilled manpower.
    3. Launch Vehicle Bottlenecks: GSLV and future NGLV development face cadence and scale constraints.

    Why are industrial capacity and regulatory clarity critical for ISRO’s next phase?

    1. Industrial Capacity: Current supplier base lacks depth to absorb shocks or scale production without delays.
    2. Supply Chain Fragility: Over-reliance on ISRO facilities makes anomalies system-wide bottlenecks.
    3. Regulatory Ambiguity: Absence of a clear space law creates uncertainty around liability, insurance, and commercial risk allocation.

    What role does the private space ecosystem play in this transition?

    1. Commercial Dependence: Private launch providers remain reliant on ISRO infrastructure and expertise.
    2. Institutional Separation: IN-SPACe and NSIL must evolve from facilitation bodies to autonomous regulatory and commercial entities.
    3. Routine Operations: Private participation is necessary to make launches, manufacturing, and satellite services routine rather than exceptional.

    Why is governance reform central to ISRO’s next phase?

    1. Legal Authority: ISRO lacks statutory backing for authorisation, dispute resolution, and commercial oversight.
    2. Regulatory Burden: Ad-hoc decisions persist due to absence of a comprehensive space law.
    3. Systemic Resilience: Institutionalised processes are required to reduce dependence on individual leadership or mission-specific improvisation.

    Conclusion

    ISRO’s future success depends on its ability to transform from a mission-centric organisation into a mature space institution, supported by industrial depth, legal clarity, and governance reform. The decisive test is whether India’s space programme can make complexity routine without diluting reliability.

    PYQ Relevance

    [UPSC 2016] Discuss India’s achievements in the field of Space Science and Technology. How has the application of this technology helped India in its socio-economic development?

    Linkage: This PYQ tests understanding of India’s space capabilities and their role in national socio-economic development. The article advances this by highlighting the need to move from mission successes to institutional sustainability, regulatory clarity, and routine execution to sustain long-term benefits.

  • Doomsday Glacier Destabilisation and the Future of Antarctic Ice Sheets

    Why in the News?

    A recent scientific study has revealed increasing fracturing in the Thwaites Glacier, also known as the Doomsday Glacier, indicating how large parts of the Antarctic ice sheets could collapse in the future. The findings were published in the Journal of Geophysical Research: Earth Surface.

    Thwaites Glacier (Doomsday Glacier)

    The Thwaites Glacier is a massive glacier in West Antarctica that drains ice from the West Antarctic Ice Sheet into the Amundsen Sea. It is one of the fastest changing glacier systems on Earth.

    Why it is called the Doomsday Glacier

    • Complete collapse could raise global sea levels by about 65 cm
    • Acts as a gateway glacier whose destabilisation can trigger wider ice sheet collapse
    • Focus area: Thwaites Eastern Ice Shelf (TEIS), a floating extension of the glacier

    Pinning point and shear zone

    • TEIS is attached to an undersea ridge called a pinning point
    • Pinning points slow ice flow but also cause compression and fracturing
    • Upstream of the pinning point lies a shear zone where ice deforms intensely

    Fracture patterns observed

    • Ice fracturing occurred in two stages
      • Long fractures parallel to ice flow
      • Smaller fractures perpendicular to ice flow
    • Annual fracture length increased sharply
      • From about 165 km in 2002
      • To about 335 km in 2022

    Consequences of fracturing

    • Breakdown of the shear zone accelerates ice flow
    • Faster ice flow increases ice discharge into the ocean
    • Raises risk of destabilisation of the entire West Antarctic Ice Sheet

    Prelims Pointers

    • Thwaites Glacier is located in West Antarctica
    • Known as the Doomsday Glacier due to sea level rise potential
    • Complete melt could raise sea levels by about 65 cm
    • Study used satellite and GPS data over two decades
    • West Antarctic Ice Sheet is a global climate tipping element
    [2021] With reference to the water on the planet Earth, consider the following statements: 

    1. The amount of water in the rivers and lakes is more than the amount of groundwater

    2. The amount of water in polar ice caps and glaciers is more than the amount of groundwater

    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

  • India Becomes First Nation to Commercially Produce Bio Bitumen

    Why in the News?

    India has become the first country in the world to commercially produce bio bitumen, according to Union Minister for Road Transport and Highways Nitin Gadkari. The announcement highlights India’s push towards sustainable infrastructure and green alternatives in road construction.

    Bio Bitumen

    Bio bitumen is an eco friendly binding material used in road construction. It is produced from renewable biological sources instead of petroleum based crude derivatives.

    Raw materials used

    • Vegetable oils
      • Crop stubble and agricultural residue
      • Other forms of organic and agro waste

    Economic significance

    • With 15 percent blending, India can save nearly ₹4,500 crore in foreign exchange
      • Lowers import bill for petroleum based bitumen
      • Opens new income streams for farmers through agro waste supply
      • Generates rural employment and livelihood opportunities

    Prelims Pointers

    • India is the first nation to commercially produce bio bitumen
      • Bio bitumen is made from renewable biological sources
      • Used in road construction as a binding material
      • Helps reduce stubble burning and crude oil imports
      • Contributes to circular economy and sustainable development
    [2011] In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material? 

    1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels

    2. Bioasphalt can be made from non-renewable resources

    3. Bioasphalt can be made from organic waste materials

    4. It is eco-friendly to use bioasphalt for surfacing of the roads

    Select the correct answer using the code given below: 

    (a) 1, 2 and 3 only (b) 1, 3 and 4 only (c) 2 and 4 only (d) 1, 2, 3 and 4

  • White dwarf system

    Why in the News?

    NASA’s Imaging X-ray Polarization Explorer (IXPE) has, for the first time, probed the internal structure of a white dwarf binary system by studying X ray polarisation. Observations of EX Hydrae revealed unexpected details about gas flows, magnetic accretion, and reflected X ray emission.

    Significance of IXPE observations

    • Enabled estimation of the height of hot accretion columns.
    • Detected X rays reflected off the white dwarf surface, a first for such systems.
    • Provided direct evidence to test theories of accretion physics, magnetic fields, and extreme states of matter.

    White Dwarf System

    A white dwarf system usually consists of a white dwarf and a companion star bound in a binary system. Matter from the companion is pulled towards the white dwarf due to its strong gravity.

    How it forms

    • A Sun like star exhausts nuclear fuel and sheds outer layers as a planetary nebula.
    • The leftover dense core becomes a white dwarf.
    • In binary systems, gas from the companion star accretes onto the white dwarf.
    • EX Hydrae belongs to a class called intermediate polars, where a moderate magnetic field partially disrupts the accretion disc and channels gas along magnetic field lines.

    Key characteristics

    • Extreme density: Mass comparable to the Sun, radius similar to Earth.
    • Degenerate matter: Supported by electron degeneracy pressure based on the Pauli Exclusion Principle, not fusion.
    • High energy emissions: Infalling gas heats to tens of millions of degrees, producing X rays.
    • Magnetic accretion: Gas flows in columns rising thousands of kilometres above the surface.
    • Chandrasekhar limit: Maximum stable mass about 1.4 times the Sun.

    Prelims Pointers

    • IXPE studies X ray polarisation, not imaging alone.
    • EX Hydrae is an intermediate polar type white dwarf system.
    • Accretion driven X ray emission occurs due to magnetic channeling.
    • White dwarfs are supported by electron degeneracy pressure.
    [2009] Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die? 

    (a) Edwin Hubble 

    (b) S. Chandrashekhar 

    (c) Stephen Hawking 

    (d) Steven Weinberg