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Type: Prelims Only

  • Women empowerment issues – Jobs,Reservation and education

    Supreme Court Ruling on ‘Self-Respect’ Marriages

    Prelims Only | History | Mains Paper 1: Salient features of Indian Society

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Self Respect Marriages

    Mains level: Read the attached story

    Central Idea

    • The recent Supreme Court ruling on ‘self-respect’ marriages under Section 7(A) of the Hindu Marriage Act, 1955 has clarified the legal standing of these marriages.
    • The court’s decision has significant implications for the validity and recognition of such unions, particularly in the state of Tamil Nadu.

    Self-respect Marriages

    • Amendment: The Hindu Marriage (Tamil Nadu Amendment) Act, 1967 introduced Section 7-A into the Hindu Marriage Act, 1955, applicable solely in Tamil Nadu.
    • Recognition of ‘Self-Respect’ Marriages: Section 7-A recognizes and legalizes ‘self-respect’ or ‘suyamariyathai’ marriages, allowing them to be solemnized without the need for traditional rituals or priests.
    • Ceremony Description: Such marriages are performed in the presence of relatives, friends, or other individuals, with couples declaring each other as spouses in a language understood by them. Exchange of garlands, rings, or tying a ‘thali’ (mangal sutra) is required. Registration remains obligatory.

    Legal Controversy

    • Madras High Court Ruling (2014): A 2014 Madras High Court ruling declared marriages solemnized by advocates as invalid, asserting that ‘self-respect’ marriages must not be secretive and should be celebrated publicly.
    • Current Supreme Court Ruling: The recent Supreme Court ruling, passed by Justices S Ravindra Bhat and Arvind Kumar, overruled the 2014 Madras High Court decision.

    Supreme Court’s Interpretation and Decision

    • The Supreme Court clarified that there is no blanket ban on advocates solemnizing ‘self-respect’ marriages under Section 7(A) of the Hindu Marriage Act.
    • The court held that ‘self-respect’ marriages can indeed be solemnized and recognized, and the 2014 Madras High Court ruling was set aside.
    • The ruling was delivered in response to a petition filed by Ilavarasan, who sought recognition of his ‘self-respect’ marriage and the release of his wife from her parents’ custody.
    • The Supreme Court’s decision is based on the interpretation of Section 7(A) and its application in the context of ‘self-respect’ marriages.

    Precedents and Past Rulings

    • In the case of Nagalingam vs. Sivagami (2001), the Supreme Court had already recognized the validity of ‘self-respect’ marriages under Section 7(A) of the Hindu Marriage Act.
    • The court emphasized that the presence of a priest is not obligatory for a valid marriage, and parties can enter into a marriage with the participation of relatives, friends, or other individuals.

    Conclusion

    • The recent Supreme Court ruling has resolved the ambiguity surrounding the legality of ‘self-respect’ marriages solemnized by advocates under Section 7(A) of the Hindu Marriage Act.
    • By overturning the previous Madras High Court ruling, the Supreme Court has clarified the validity and recognition of such marriages, ensuring that ‘self-respect’ marriages can be solemnized without the need for traditional rituals or priests in Tamil Nadu.

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  • ISRO Missions and Discoveries

    Nabhmitra: Satellite-Based Safety Device for Fishermen

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Nabhmitra

    Mains level: Not Much

    nabhmitra

    Central Idea

    • The ISRO Space Applications Centre (Ahmedabad) has developed ‘Nabhmitra,’ a groundbreaking device designed to enhance the safety of fishermen during their maritime activities.

    About Nabhmitra

    • Nabhmitra employs satellite-based communication for seamless messaging services while at sea.
    • Weather alerts, cyclone warnings, and other critical information will be conveyed in the local language.
    • Fishermen can send distress messages during emergencies, such as capsizing or fires.
    • The device features an emergency button that enables direct communication with the control center.
    • Upon pressing the emergency button, the control center receives the alert along with the boat’s location. Simultaneously, the boat’s crew receives a response message from the control center.

    Benefits of Nabhmitra

    • Nabhmitra enhances the safety of fishermen by providing swift communication during emergencies.
    • Fishermen receive timely weather and cyclone alerts, aiding them in making informed decisions.
    • The device provides information about shipping channels, maritime boundaries, and fishing fields.
    • In the event of accidents or crises, the device streamlines communication between boats and authorities.

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  • Capital Markets: Challenges and Developments

    SEBI’s Amendments to boost REITs and InvITs

    Prelims Only | Economics | Mains Paper 3: Investment Models

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: REITs and InvITs

    Mains level: Not Much

    Central Idea

    • The Securities and Exchange Board of India (SEBI) has recently approved crucial changes to the regulations governing real estate investment trusts (REITs) and infrastructure investment trusts (InvITs), aimed at enhancing their appeal to investors.
    • These investment vehicles function similarly to mutual funds, pooling capital to invest in real estate or infrastructure projects.

    What are REITs and InvITs?

    Real Estate Investment Trusts (REITs) Infrastructure Investment Trusts (InvITs)
    Structure Investment trusts owning real estate properties Investment trusts owning revenue-generating infrastructure projects
    Regulation Regulated by SEBI Regulated by SEBI
    Assets Commercial real estate properties (no residential) Operational infrastructure projects
    Units Units issued to investors, traded on stock exchanges Units issued to investors, traded on stock exchanges
    Distribution Mandatory distribution of a significant portion of income as dividends Mandatory distribution of a certain percentage of cash flows as dividends
    Tax Benefits (Dividends) Dividend distribution exempt from DDT Dividend distribution exempt from DDT
    Taxation (Investor’s Dividends) Taxable as per investor’s income tax slab Taxable as per investor’s income tax slab
    Asset Focus Commercial properties: office buildings, malls, etc. Operational infrastructure projects
    Purpose Income generation and capital appreciation Income generation and capital appreciation
    Project Type Income-generating properties Operational brownfield projects
    Examples in India Embassy Office Parks REIT, Mindspace Business Parks REIT IndiGrid Trust, IRB InvIT Fund, Sterlite Power Grid Ventures InvIT

     

    Importance of REITs and InvITs

    • Investment Pooling: REITs and InvITs operate as investment pooling vehicles, allowing sponsors to invest in real estate or infrastructure projects.
    • Affordable Ownership: REITs offer retail investors access to income-generating real estate properties that would otherwise be unaffordable.
    • Direct Investment: InvITs enable both individual and institutional investors to directly invest in infrastructure projects, spanning transport, energy, and communication sectors.

    Performance of REITs and InvITs

    • Growing Popularity: Since their launch in 2019, REITs have gained traction, demonstrating resilience during challenges such as the pandemic.
    • Rising Interest: InvITs have a broader scope, with multiple listings, including IRB InvIT Fund and Embassy Office Parks Reit.
    • Assets Under Management: As of the beginning of 2023, REITs and InvITs registered with Sebi managed assets exceeding ₹3.5 trillion.

    Sebi’s Amendments Explained

    • Unit Holder Nomination Rights: Sebi has granted board nomination rights to unit holders of InvITs and REITs, allowing them greater influence.
    • Minimum Unit Holding Change: The minimum unit holding requirement for sponsors has been revised, enhancing flexibility.
    • “Self-Sponsored Investment Managers”: Sebi introduced the concept of self-sponsored investment managers, enabling them to assume Reit sponsor responsibilities.

    Importance of the Changes

    • Enhanced Corporate Governance: These amendments are designed to bolster corporate governance and streamline the functioning of InvITs and REITs.
    • Retail Unit Holder Rights: The changes empower retail unit holders by giving them a voice and ensuring accountability through the Stewardship Code.
    • Sponsor Commitment: Sponsors are now required to maintain a minimum number of units throughout the lifespan of the Reit or InvIT.
    • Self-Sponsored Investment Managers: This concept provides flexibility for Reit sponsors and potential exit options.

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  • ISRO Missions and Discoveries

    Chandrayaan-3 landing site called ‘Shiv Shakti’

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    shiv shakti

    Central Idea

    • PM’s recent announcement of naming the Chandrayaan-3 lunar lander’s touch-down site as “Shiv Shakti” highlights the tradition of assigning names to significant points on celestial bodies.
    • The lunar landscape is peppered with such nomenclature, each reflecting a rich history of exploration and achievement.

    Lunar Ownership and the Outer Space Treaty

    • Global Exploration: The Moon, as a celestial body, remains beyond the jurisdiction of any single country. The Outer Space Treaty of 1966 declares that outer space, including celestial bodies like the Moon, cannot be claimed under national sovereignty.
    • Cooperation over Competition: The Treaty fosters international cooperation in space exploration while discouraging exclusive claims. It was developed during the Cold War to promote shared achievements and limit conflicts arising from superpower rivalry.

    Role of the International Astronomical Union (IAU)

    • Global Naming Authority: The IAU, with 92 member countries, plays a pivotal role in naming planetary features, including the Moon’s surface points.
    • Established Conventions: The IAU has overseen planetary and satellite nomenclature since its founding in 1919, aiming to standardize naming practices for better astronomical understanding.

    Nomenclature Process for Lunar Landmarks

    • Initiation: Initial naming suggestions for planetary features arise from IAU task group members or investigators involved in mapping or describing specific surfaces.
    • Review and Approval: Proposed names undergo review by task groups and the Working Group for Planetary System Nomenclature (WGPSN). Successful names become official IAU nomenclature and are entered into the Gazetteer of Planetary Nomenclature.
    • Considerations and Limitations: IAU’s guidelines emphasize simple and unambiguous names, avoiding political, military, or religious significance. Honouring individuals is acceptable after a three-year posthumous period.

    Legacy of Lunar Naming

    • Influential Factors: The quality of images from spacecraft has driven naming. Far-side craters were often named after scientists and engineers. Informal names given during missions eventually received official status.
    • Variability and Symbolism: Not all notable figures are honored with prominent crater names. The selection can seem arbitrary, with scientific prominence not guaranteeing crater-endowed immortality.
    • Cultural Inspirations: The IAU permits names from Greco-Roman mythology for Jupiter and Saturn’s satellites. Giants, monsters, and descendants of mythological figures have been added to the allowable source of names.

    India’s earlier Lunar Naming

    • Jawahar Sthal: India’s Chandrayaan-1 mission’s probe impact site was named “Jawahar Sthal” in honor of Jawaharlal Nehru, India’s first Prime Minister. His advocacy for scientific development and research in India inspired the gesture.

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  • ISRO Missions and Discoveries

    After Chandrayaan-3, what has ISRO planned?

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: ISRO Missions

    Mains level: Not Much

    isro missions

    Central Idea

    • ISRO’s triumphant landing of the Chandrayaan-3 lander on the moon’s South Polar Region marks a significant achievement in space exploration.
    • As India emerges as a key player in the field, the focus now shifts to its multifaceted activities, upcoming missions, and technological advancements.

    Diverse ISRO Activities

    • Multifaceted Endeavors: ISRO’s operations span research, satellite development, rocket production, satellite tracking infrastructure maintenance, and more, catering to diverse space-related needs.
    • Key Focus Areas: Prominent areas of focus include the ‘Gaganyaan’ human spaceflight mission, Reusable Launch Vehicle Technology Demonstrator (RLV-TD), SCE-200 engine development, and the Small Satellite Launch Vehicle (SSLV).

    Glimpses of Upcoming Missions

    • Aditya L1: Scheduled for September 2023, Aditya L1 is a scientific mission to study the sun in detail, providing critical insights into solar activities.
    • NISAR Satellite: In January 2024, the joint ISRO-NASA NISAR satellite will study earth’s surface processes using advanced radar technology.
    • Gaganyaan G1 and G2 Flights: 2024 witnesses test flights of human-rated rockets, a prelude to India’s ambitious Gaganyaan human spaceflight.

    Beyond Launches: Technology Innovations

    • Reusable Launch Vehicle (RLV-TD): Resembling the NASA Space Shuttle, RLV-TD’s design enables air propulsion or gliding, capable of lifting 20,000 kg to low-earth orbit.
    • Advanced Propulsion: ISRO explores advanced rocket fuels like methalox propellant and electric propulsion systems, enhancing efficiency and safety.

    Moon Missions and Lunar Exploration

    • Chandrayaan-3 and Beyond: Chandrayaan-3 paves the way for further lunar exploration, with plans for missions like LUPEX (Lunar Polar Exploration) in collaboration with JAXA.
    • LUPEX’s Ambitions: LUPEX aims to deploy a sophisticated lander and rover to study the moon’s South Polar Region, including subsurface sample extraction and night survival.

    Expanding Collaborations and Global Partnerships

    • Alternative Space Service Providers: ISRO fills gaps left by sanctions on Russia, launching OneWeb satellites and expectedly launching the European Space Agency’s PROBA-3 satellites.
    • Lunar Exploration with JAXA: Collaborating with JAXA for LUPEX showcases ISRO’s commitment to global partnerships in space exploration.

    Mars and Venus Missions

    • Mars Return Mission: ISRO plans a return to Mars, building on its previous successful Mars Orbiter Mission (Mangalyaan).
    • Venus Exploration: ‘Shukrayaan’: Ambitious plans to study Venus through the ‘Shukrayaan’ mission demonstrate ISRO’s expanding horizons in planetary exploration.

    Conclusion

    • ISRO’s remarkable accomplishments and future undertakings illuminate its stature as a global space powerhouse.
    • From lunar landings to solar studies, human spaceflight to interplanetary missions, ISRO continues to shape the landscape of space exploration.
    • By pushing boundaries, fostering innovation, and fostering international cooperation, ISRO cements its role in humanity’s journey to unravel the mysteries of the cosmos.

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  • Health Sector – UHC, National Health Policy, Family Planning, Health Insurance, etc.

    Somatic Genetic Variants: A genomic revolution hiding inside our cells

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Somatic genetic variants

    Mains level: Not Much

    somatic gene

    Central Idea

    • The human genome, comprising 23 pairs of chromosomes, is the blueprint of our genetic makeup inherited from our parents.
    • The replication of this genetic information in nearly a trillion cells during development results in a complex mosaic of cellular diversity.
    • Despite remarkable DNA replication accuracy, mutations still occur.

    What are Somatic Genes?

    • Somatic genetic variants, also known as somatic mutations or somatic alterations, are genetic changes that occur in the cells of an organism’s body (somatic cells) during its lifetime.
    • These mutations are distinct from germline mutations, which are inherited from parents and are present in every cell of an individual’s body.
    • Somatic mutations are acquired after conception and are not passed on to future generations.
    • Somatic mutations can occur due to various factors, such as exposure to environmental mutagens (like radiation or chemicals), errors in DNA replication, and other cellular processes.
    • These mutations can affect the DNA sequence of specific genes, leading to changes in protein production or function.

    DNA Replication: The Copy-Paste Mechanism

    • Genetic Inheritance: Ovum and sperm carry parental genetic blueprints, which combine after fertilization.
    • Cell Division: The single fertilized cell, with 23 chromosomes, multiplies to form the human body’s trillions of cells.
    • DNA Replication Accuracy: Proteins proofread and correct DNA during replication, resulting in an error rate of 0.64-0.78 mutations per billion base pairs per division.

    Impact of Somatic Genetic Mutations

    • Dependent on Timing: Errors occurring after birth but during development are somatic genetic mutations.
    • Driver Mutations: Mutations that confer a fitness advantage to cells can lead to tumor formation and are called driver mutations.
    • Cellular Mosaic: Human body is a mosaic of cells with subtle genomic differences, influenced by somatic genetic variants.
    • Genetic Variants: Genetic variants within functional genome regions can affect protein encoding and regulation.

    Somatic Variants and Physiological Processes

    • Immune Cell Diversity: Immune cells undergo extensive somatic changes to create diverse antibodies recognise pathogens.
    • Recent Knowledge Explosion: Technological advancements in sequencing individual cells have led to an explosion of data and knowledge on somatic variants.
    • Cancer’s Role: Somatic genetic variants play a significant role in cancer development, aiding in early detection, diagnosis, and prognosis.

    Cancer Mutational Signatures

    • Mutational Signatures: Specific genetic variations and patterns are characteristic of certain cancers, enabling early detection.
    • Blood-Based Detection: Technologies identify tumour DNA in blood to detect cancer early.
    • Disease Progress Tracking: Cancer variations can be used to monitor disease progression and therapy response.

    Somatic Variants in Genetic Diseases

    • Genetic Diseases Origin: Many genetic disorders arise from somatic genetic variants, not inherited from parents.
    • Disease Severity and Timing: The severity and distribution of genetic diseases depend on the timing of somatic mutations during development.
    • Immune Disorders: Somatic changes can cause immune disorders and even beneficially reverse some genetic diseases.

    SMaHT Network: Understanding Somatic Mosaicism

    • Somatic Mosaicism: US has launched the ‘Somatic Mosaicism across Human Tissues’ (SMaHT) Network.
    • Aims: SMaHT aims to discover somatic variants, develop tools for study, and improve analysis for biological and clinical insights.
    • Investment and Research: The U.S. government has invested $140 million to study somatic variants in post-mortem samples.

    Implications and Future Prospects

    • Cellular Complexity: Studying somatic variants reveals the intricate diversity of cells and reshapes evolutionary understanding.
    • Disease Management: Understanding somatic genetic changes can advance disease understanding and management.
    • Innovative Approaches: Analyzing genes at the single-cell level paves the way for innovative disease approaches and insights into evolution.

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  • Nuclear Energy

    In news: International Atomic Energy Agency (IAEA)

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Disaster Management

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: IAEA

    Mains level: Not Much

    Central Idea

    • Japan has begun discharging treated radioactive wastewater from the disabled Fukushima Daiichi Nuclear Power Station into the Pacific Ocean in a plan endorsed by the International Atomic Energy Agency (IAEA).

    International Atomic Energy Agency (IAEA)

    • IAEA is an international organization that plays a pivotal role in promoting the peaceful use of nuclear energy while preventing the proliferation of nuclear weapons.
    • It was established in 1957 as an autonomous agency under the UN is headquartered in Vienna, Austria.
    • It plays a crucial role in safeguarding the principles outlined in the Nuclear Non-Proliferation Treaty (NPT) of 1970.
    • Despite its independent treaty, the IAEA remains accountable to both the UN General Assembly and the United Nations Security Council (UNSC).

    What does it do?

    • Promotion of Peaceful Nuclear Energy: Established amidst the Cold War’s geopolitical tension, the IAEA’s core mission centers on promoting the constructive application of nuclear energy.
    • Prevention of Military Use: The agency’s fundamental role is to prevent the diversion of nuclear programs for military intentions, ensuring compliance with international agreements.

    IAEA’s Tri-fold Missions

    • Peaceful Utilization: Fostering member states’ constructive adoption of nuclear energy for peaceful purposes constitutes a pivotal aspect of IAEA’s mission.
    • Safeguarding Measures: A cornerstone role of the IAEA involves implementing measures to verify the non-military use of nuclear energy, particularly through assessing declared nuclear activities and materials.
    • Nuclear Safety: The IAEA takes an active stance in advocating stringent standards of nuclear safety to prevent accidents and ensure public and environmental protection.

    Significant feature: IAEA’s Safeguards

    • Purpose of Safeguards: IAEA’s safeguards are mechanisms designed to affirm that a nation adheres to its international commitment against exploiting nuclear programs for weaponry purposes.
    • Verification Approach: Safeguards are founded on the meticulous examination of a state’s reported nuclear materials and activities, evaluating their accuracy and completeness.
    • Varied Verification Measures: The agency employs a range of verification tools, including on-site inspections, visits, and ongoing monitoring, ensuring rigorous oversight.

    Dual Dimensions of Safeguards

    • Declared Nuclear Material Verification: Through the inspection of reported nuclear materials and activities, IAEA ensures that a state remains transparent in its nuclear endeavors.
    • Non-Diversion Assurance: A significant facet is the assurance of the absence of undeclared nuclear materials or activities, thereby averting any unauthorized deviation from peaceful usage.

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  • ISRO Missions and Discoveries

    Unraveling the Lunar Landscape: Near, Far, and Dark Sides

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Near, Far, and Dark Sides, KREEP

    Mains level: Lunar study by Chandrayaan 3

    far dark side lunar moon

    Central Idea

    • The Chandrayaan-3 mission’s recent lunar landing has sparked curiosity about the moon’s various sides – near, far, and even the intriguing ‘dark’ side.
    • Delving into these distinctions sheds light on the moon’s enigmatic nature and how space exploration helps us unravel its mysteries.

    Facts for Prelims

    Impact/Landing point names on Moon:

    1. Chandrayaan 1: Jawahar Point

    2. Chandrayaan 2: Tiranga Point

    3. Chandrayaan 3: Shivshakti Point

     Moon’s Visible and Hidden Faces

    • Near and Far Sides: The moon’s ‘near side,’ visible from Earth, covers around 60% of its surface. In contrast, the ‘far side’ remained hidden from us until modern spacecraft brought it into view.
    • Clarifying the ‘Dark’ Side: Often misconstrued as constantly dark, the ‘dark side’ simply refers to the unseen side. It gets illuminated during the ‘new moon’ phase, challenging the misconception of its perpetual darkness.

    Why is their composition different?

    • The composition of the Moon’s near and far sides is different, and scientists believe they have identified the reasons behind this discrepancy.
    • A study published in the journal Nature Geoscience reveals that the presence of KREEP, a rock enriched in potassium (K), rare-earth elements (REE), and phosphorus (P), plays a crucial role.

    Key Points from the Study:

    • Moons Near and Far Sides: The Moon’s near side, always facing Earth, has visible dark and light patches known as “maria.” Telescopic observations showed that these were not seas as early astronomers thought, but rather craters or volcanic features. The far side of the Moon has fewer maria than the near side.
    • Moon’s Formation: The uneven distribution of volcanism and the KREEP signature between the near and far sides of the Moon puzzled scientists.
    • Radioactive Unstable Elements: Potassium (K), thorium (Th), and uranium (U) are unstable, radioactive elements that have various isotopes with different numbers of neutrons. The radioactive decay of these elements generates heat that can melt rocks and contribute to volcanic activity.
    • Heat and Melting: The study found that the inclusion of KREEP in rocks not only enhances heating but also lowers their melting temperature. This combination increases volcanic activity beyond what is predicted by radiogenic decay models.
    • Geological Record: The Moon’s surface preserves geological events from the early history of the Solar System due to the absence of erosion processes. Concentrations of radioactive elements like uranium (U) and thorium (Th) on the near side provide insights into the Moon’s formation and early Earth conditions.

    Phases and Illumination

    • New Moon Phase: The ‘new moon’ phase unveils the moon’s ‘far side,’ exposing it to sunlight for about two weeks.
    • Historic Revelation: In 1968, astronauts aboard Apollo 8 became the first humans to observe the ‘far side,’ demystifying its hidden features.

    Chandrayaan-3’s Approach

    • Closest South Pole Landing: Chandrayaan-3’s landing at coordinates 69.36 S and 32.34 E marks the closest approach to the lunar South Pole.
    • Exploring Permanently Shadowed Regions: The strategic landing aimed to study regions that never receive sunlight, potentially containing frozen water ice and other lunar resources.
    • Sunlight Necessity: Vikram’s nearness to the South Pole ensures sunlight for solar battery recharging, crucial for its operation.
    • Choice of Landing Site: The decision to land on the ‘near side’ was driven by mission objectives, including real-time communication with Earth. Landing on the ‘far side’ would have required relay satellites and introduced delays.

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  • Electronic System Design and Manufacturing Sector – M-SIPS, National Policy on Electronics, etc.

    Indian start-up joins Sodium Ion Battery Innovation

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Sodium-Ion Battery (NIB)

    Mains level: Not Much

    sodium ion battery

    Central Idea

    • Coimbatore-based start-up AR4 Tech has joined hands with Singapore’s Sodion Energy to revolutionize the energy storage landscape by producing sodium-ion battery packs for both local and global markets.
    • These sodium-ion batteries will find applications in converting conventional petroleum-based vehicles, primarily two-wheelers, into electric vehicles.

    What is Sodium Ion Battery (NIB)?

    • A NIB is a type of rechargeable battery that uses sodium ions as the charge carriers to store and release electrical energy.
    • Similar in principle to lithium-ion batteries, sodium-ion batteries offer an alternative energy storage solution with potential benefits such as cost-effectiveness and abundance of sodium resources.

    Key characteristics  

    • Working Principle: Sodium-ion batteries operate on the same basic principle as lithium-ion batteries. During charging, sodium ions are moved from the positive electrode (cathode) to the negative electrode (anode), and during discharge, they move back to the cathode, generating electrical energy in the process.
    • Sodium Anode: In a sodium-ion battery, the anode typically consists of materials that can intercalate (absorb) sodium ions during charging. Graphite and other carbon-based materials are commonly used for the anode in sodium-ion batteries.
    • Cathode Materials: Various materials can be used as cathodes in sodium-ion batteries, such as transition metal oxides or polyanionic compounds. These cathode materials allow sodium ions to be stored and released, enabling the battery’s energy storage function.
    • Electrolyte: The electrolyte in a sodium-ion battery is responsible for facilitating the movement of sodium ions between the anode and cathode during charge and discharge cycles. Sodium-ion batteries typically use a solid electrolyte or a liquid electrolyte containing sodium salts.

    Advantages offered

    • Abundance of Resources: Sodium is more abundant and widely available than lithium, which can potentially make sodium-ion batteries more cost-effective.
    • Environmental Impact: They may have a lower environmental impact compared to lithium-ion batteries due to the more widespread availability of sodium resources.

    Challenges

    • Energy Density: Sodium-ion batteries generally have lower energy density compared to lithium-ion batteries, which can limit their use in applications requiring high energy storage capacity.
    • Cycle Life: Ensuring a long cycle life (the number of charge and discharge cycles a battery can go through before losing capacity) remains a challenge for sodium-ion batteries.

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  • Nuclear Energy

    Fukushima Water Release: Facts and Controversies

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Fukushima Disaster

    Mains level: Not Much

    Fukushima

    Central Idea

    • Japan’s decision to release cooling water from the Fukushima nuclear power plant into the Pacific Ocean has sparked a complex debate.
    • Amidst concerns about radiation, environmental impact, and transparency, understanding the facts is vital.

    About Fukushima Disaster

    • The Fukushima disaster refers to a series of nuclear incidents that occurred at the Fukushima Daiichi Nuclear Power Plant in Okuma, Fukushima Prefecture, Japan.
    • It followed the powerful earthquake and tsunami that struck on March 11, 2011.
    • The disaster resulted in the release of radioactive materials and had significant implications for both human health and the environment.
    • It is considered one of the most severe nuclear accidents in history, alongside the Chernobyl disaster.

    Why Fukushima Water is Being Released?

    • Storage Constraints: The Fukushima facility’s storage tanks are at full capacity due to the need for constant cooling of damaged reactors since the 2011 tsunami disaster.
    • Vast Water Volume: The plant requires 170 tons of cooling water daily, with rain and groundwater further exacerbating the issue. The site holds 1,343 million cubic meters of water across 1,046 storage tanks.
    • Release Process: Filtered water undergoes a one-kilometre tunnel before entering the Pacific Ocean. This process is expected to span 30 years while the radioactive waste remains on land.

    Regulatory Approval and Skepticism

    • Regulatory Endorsement: Both Japan’s atomic agency and the International Atomic Energy Agency (IAEA) have approved the release, stating negligible radiological impact.
    • Skepticism and Concerns: Environmentalists, fishing experts, neighbouring states, and public sentiments accuse Japan of underplaying radiation levels. Concerns encompass ocean contamination, ecological harm, economic loss, and damage to reputation.

    Water Preparation and Tritium

    • Filter System: Contaminated water passes through the Advanced Liquid Processing System (ALPS), capable of filtering 62 radioactive elements but not tritium.
    • Tritium Dilution: The plant agency intends to dilute tritium concentration to 1,500 Becquerel per liter, a fraction of the safety standard, before releasing it.
    • Tritium Safety: Experts assert that tritium, a weak radioactive form of hydrogen, poses minimal risk as it emits weak beta particles, easily blocked by materials like plastic or skin.

    Pacific Ocean’s Role and Controversy

    • Dilution Principle: Experts stress that “the solution to pollution is dilution.” When water is sufficiently diluted, it becomes safe for both humans and the environment.
    • Tritium Focus and Critique: Greenpeace accuses the government and plant agency of focusing on tritium to divert attention from other radioactive elements that won’t be filtered out.
    • Alternatives and Considerations: Alternatives like additional tanks or evaporation exist. However, concerns over tank leaks and airborne radioactive releases complicate these options.

    Conclusion

    • The Fukushima water release debate presents a complex array of scientific, environmental, and geopolitical considerations.
    • Striking a balance between environmental preservation, public safety, and responsible nuclear waste management remains a challenging task.
    • As experts, activists, and governments deliberate, it’s essential to foster transparency, prioritize informed discussions, and seek solutions that minimize risks and promote global well-being.

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