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  • Study revives South Korea Superconductivity claim

    Superconductivity

    Introduction

    What is Superconductivity?

    • Zero Resistance: Superconductivity occurs when a material offers almost zero resistance to the flow of electric current, enabling energy-efficient electrical appliances and lossless power transmission.
    • Magnetic Behavior: Superconductors also display fascinating behavior under magnetic fields, enabling technologies like MRI machines and superfast Maglev trains.

    Exploring the Material LK-99

    • Apatite Structure: The Korean group utilized copper-substituted lead apatite, a phosphate mineral with unique tetrahedral motifs, to create LK-99.
    • Superconducting Behavior: LK-99 displayed essential superconducting properties, with almost zero resistance to current flow and sudden emergence of resistance above a critical current threshold.
    • Magnetic Resilience: LK-99 retained superconductivity even under the presence of a magnetic field until reaching a critical threshold.

    Meissner Effect: Key Indicator of Superconductivity

    • Definition: The Meissner effect is a phenomenon where materials expel magnetic fields from their interior upon becoming superconductors.
    • Observation in Study: The researchers observed this effect in copper-substituted lead apatite, suggesting potential superconductivity.

    Quest for Room-Temperature Superconductors

    • Significance: Discovering a material that is superconducting at room temperature and pressure (RTP) has immense scientific and commercial value.
    • Applications: RTP superconductors could revolutionize power transmission, medical diagnostics, computing, and more, due to their ability to conduct electricity without loss.

    Hype and Controversies in Superconductivity Research

    • Past Controversies: The field has seen several disputes, including claims by Ranga Dias and a South Korean research group, which were later contested.
    • Impact of Hype: The lucrative potential of RTP superconductors has sometimes led to premature claims and controversies in the scientific community.

    New Study: Methodology and Findings

    • Approach: The team synthesized LK-99 samples using advanced techniques and tested for signs of superconductivity beyond specific claims made by previous studies.
    • Direct Current Measurements: They conducted hysteresis experiments, applying and removing a magnetic field to observe the material’s response at various temperatures.

    Understanding Hysteresis in Superconductors

    • Meissner Effect and DC Current: The Meissner effect is observable with direct current, as alternating current would disrupt the phenomenon.
    • Type I and II Superconductors: The study helps distinguish between these types based on how they respond to increasing magnetic field strength.

    Challenges and Limitations of the Study

    • Small Superconducting Portions: The material’s superconducting sections were small, leading to a low critical magnetic field strength.
    • Interference Issues: The presence of cuprous sulphide interfered with molecular structure analysis using X-rays.

    Way Forward: Verifying RTP Superconductivity

    • Potential for RTP Superconductivity: While the study suggests near-RTP superconductivity in LK-99, definitive observation is yet to be made.
    • Need for Further Research: Identifying the material responsible for superconductivity and refining synthesis techniques are crucial next steps.

  • CLPS Initiative: First US Commercial Robotic Moon Mission

    clps

    Introduction

    • A private US company launched a spacecraft carrying NASA instruments, aiming to be the first US spacecraft to land on the Moon in over 50 years.
    • This mission is a key component of NASA’s Commercial Lunar Payload Services, integrating private sector capabilities into the Artemis Program.

    About Commercial Lunar Payload Services (CLPS) Initiative

    • NASA’s collaboration with the private sector under the CLPS initiative involves at least 14 companies contracted to deliver payloads to the Moon.
    • This partnership aims to develop a market and technology ecosystem in the private space industry for lunar exploration.
    • The mission features the Peregrine lander and the Vulcan rocket, both developed by private US space companies.

    Objectives and Payloads

    • NASA’s Five Payloads: The Peregrine lander carries five NASA payloads designed for various exploratory tasks, including water detection.
    • Laser Retroreflector Array: One payload, designed for precision distance measurements, will be permanently deployed on the Moon’s surface.
    • Duration of Activity: Other payloads are expected to remain active for ten days post-landing.

    Historical Context: Return to the Moon

    • Last US Moon Landing: The last US spacecraft landed on the Moon during the Apollo 17 mission in December 1972.
    • Renewed Lunar Interest: The US reignited its lunar exploration efforts in the 1990s and formally committed to return in 2018.
    • Artemis Program Goals: NASA’s Artemis Program aims to establish a permanent base on the Moon, facilitating longer human and robotic stays for extensive exploration and scientific research.

    Back2Basics: NASA’s Artemis Mission

    Details
    Background Named after Apollo’s twin sister in Greek mythology, Artemis, who is also the goddess of the Moon.
    Objective To enable human exploration to the Moon and Mars, with increasingly complex missions.
    Key Milestones Landing humans on the Moon by 2024.

    Landing the first woman and first person of color on the Moon.

    Establishing an Artemis Base Camp on the lunar surface and a Gateway (lunar outpost) in lunar orbit.
    International Collaboration Canadian Space Agency, European Space Agency, and Japan Aerospace Exploration Agency
    Artemis I Mission First integrated flight test of NASA’s Deep Space Exploration Systems

    Uncrewed mission using the Orion spacecraft and Space Launch System (SLS) rocket

    Launch from Kennedy Space Center, Florida, in 2022

    Goals include safe crew module entry, descent, splashdown, and recovery
    Future Missions Artemis II will have a crew onboard to test Orion’s systems

    Plans to use lunar orbit experience for future Mars missions

  • From Red Ant Chutney to Black Rice: 7 Odisha products have bagged GI tags

    red ant

    Introduction

    • Seven products from Odisha, including traditional foods and handicrafts, have received the Geographical Indication (GI) tag.

    About GI Tag

    • A GI is a sign used on products that have a specific geographical origin and possess qualities or a reputation that are due to that origin.
    • Nodal Agency: Department for Promotion of Industry and Internal Trade (DPIIT), Ministry of Commerce and Industry
    • India, as a member of the World Trade Organization (WTO), enacted the Geographical Indications of Goods (Registration and Protection) Act, 1999 w.e.f. September 2003.
    • GIs have been defined under Article 22 (1) of the WTO Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS) Agreement.
    • The tag stands valid for 10 years.

    Odisha’s GI Tagged Products

    [1] Kapdaganda Shawl

    • Cultural Emblem: Woven by the Dongria Kondh tribe, this shawl is a symbol of heritage and affection, embroidered with significant colors representing nature and emotions.
    • Symbol of Commitment: Often presented during courtship, it signifies formal commitment and is a testament to the tribe’s rich textile legacy.

    [2] Lanjia Saura Painting (Idital)

    • Tribal Artistry: Belonging to the Lanjia Saura community, these murals painted on mud walls are not just art but a spiritual expression of gratitude and well-being.
    • Diverse Representations: With 62 types for various occasions, these paintings reflect the community’s deep connection with nature and their ancestors.

    [3] Koraput Kala Jeera Rice

    • Aromatic Heritage: Known as the ‘Prince of Rice’, this black-coloured variety is celebrated for its taste and nutritional benefits, preserved by tribal farmers for centuries.
    • Health and Tradition: Beyond its culinary appeal, the rice is intertwined with tales of physical, mental, and spiritual well-being.

    [4] Similipal Kai Chutney

    • Forest Delicacy: Made from red weaver ants found in the Similipal forests, this chutney is a traditional tribal delicacy packed with nutritional and medicinal value.
    • Sustainable Livelihood: The preparation and sale of this chutney provide a source of income for the local tribes, reflecting a harmonious relationship with nature.

    [5] Nayagarh Kanteimundi Brinjal

    • Distinctive Flavour: Known for its prickly thorns and unique taste, this brinjal variety is a culinary favorite, cultivated extensively in Nayagarh district.
    • Agricultural Pride: With a history of cultivation dating back nearly a century, this brinjal represents the agricultural ingenuity and tradition of the region.

    [6] Odisha Khajuri Guda

    • Natural Sweetener: Extracted from date palm trees, this jaggery is an organic delight, known for its dark brown color and unique taste.
    • Cultural Sweetness: Traditionally prepared in a trapezoidal form, it’s not just a sweetener but a part of the cultural fabric of Odisha.

    [7] Dhenkanal Magji

    • Cheese-Based Sweet: Originating from buffalo milk cheese, this sweet is known for its distinct characteristics and nutritional value.
    • Legacy of Livelihood: Reflecting the region’s history of buffalo rearing and dairy production, this sweet contributes to the livelihood of thousands.

  • First Advance Estimates of India’s GDP out

    advance estimate

    Introduction

    • Growth Projection: India’s GDP is projected to grow by 7.3% in the financial year 2023-24, as per the First Advance Estimates (FAEs) released by the government.
    • Comparison with Previous Year: This rate is slightly higher than the 7.2% growth recorded in 2022-23.

    What is Gross Domestic Product (GDP)?

    • Definition: GDP quantifies the total monetary value of all goods and services produced within a country’s borders in a specific time frame, typically annually.
    • Difference from GNP: GDP is distinct from Gross National Product (GNP), which measures the value of goods and services produced by a country’s nationals, regardless of the production location.

    First Advance Estimates of GDP

    • Introduction and Timing: First introduced in the financial year 2016-17, the First Advance Estimates (FAE) are released at the beginning of January.
    • Nature of Estimates: They represent the initial official projections of GDP growth for the financial year, published before the year concludes.
    • Data Exclusion: Notably, the FAE do not include formal GDP data for the third quarter (October to December), which is released with the Second Advance Estimates (SAE) at the end of February.

    Significance of FAE

    • Election Year Context: With Lok Sabha elections due in April-May, the FAEs gain additional significance, although a full-fledged Union Budget will not be presented this year.
    • Budgetary Relevance: The FAE are crucial for the Union Finance Ministry’s budgetary planning for the next financial year, as the SAE are published after the budget is finalized.
    • Focus on Nominal GDP: For budget-making, the emphasis is on nominal GDP (the observed variable), including both its absolute level and growth rate.
    • Real vs. Nominal GDP: Real GDP, adjusted for inflation, is a derived metric, whereas all budget calculations commence with nominal GDP.

    GDP Growth Analysis

    • Real GDP Growth: The real GDP (adjusted for inflation) is expected to reach nearly Rs 172 lakh crore by March 2024.
    • Comparison with Modi’s Tenure: The GDP has grown from Rs 98 lakh crore at the start of Prime Minister Modi’s first term to almost Rs 140 lakh crore at the beginning of his second term.
    • Growth Rate Trends: The estimated 7.3% growth for 2023-24 is higher than most forecasts, indicating a strong economic recovery. However, there’s a noticeable deceleration in growth during Modi’s second term compared to the first.

    Factors Driving India’s Growth

    • Private Final Consumption Expenditure (PFCE): Accounting for almost 60% of GDP, PFCE is expected to grow by 4.4% in the current year.
    • Gross Fixed Capital Formation (GFCF): Investment spending, the second-largest growth engine, has grown by 9.3% this year.
    • Government Final Consumption Expenditure (GFCE): Government spending growth has been slower, at 3.9% in the current year.
    • Net Exports: The negative growth in net exports indicates a higher import-than-export rate, which has increased by 144% this year.

    Concerns and Challenges

    • Private Consumption: Muted private consumption, especially in rural India, remains a concern.
    • Investment Spending: A significant portion of investment spending is still driven by the government, with private consumption remaining subdued.
    • Government Spending: Government spending growth has been relatively low in the second term of Modi’s government.
    • Net Exports: The negative growth in net exports, though a mild improvement over the two terms, still indicates an imbalance in trade.

    Conclusion

    • Economic Recovery: The 7.3% growth rate suggests a robust economic recovery post-pandemic.
    • Balanced Growth: The need for balanced growth across all sectors, especially in boosting private consumption and investment, is critical for sustainable development.
    • Future Prospects: The ongoing economic policies and reforms will play a crucial role in shaping India’s growth trajectory in the coming years.

    https://indianexpress.com/article/explained/explained-economics/gdp-data-advance-estimates-9099092/

  • AI-Driven Bio-Imaging Bank for Cancer Detection

    Introduction

    • The rising number of cancer cases and the shortage of specialists present a significant challenge in reducing fatalities.
    • Mumbai’s Tata Memorial Hospital (TMH) is leveraging artificial intelligence (AI) to create a ‘Bio-Imaging Bank’ for early-stage cancer detection.

    What is a ‘Bio-Imaging Bank’?

    • Comprehensive Repository: The Bio-Imaging Bank is a repository containing radiology and pathology images linked with clinical information, outcome data, treatment specifics, and additional metadata.
    • AI Integration: The project uses deep learning to develop a cancer-specific tailored algorithm for early detection, incorporating data from 60,000 patients.

    Project Scope and Collaboration

    • Focus on Specific Cancers: Initially targeting head and neck cancers and lung cancers, the project aims to collect data for at least 1000 patients for each type.
    • Multi-Institutional Effort: Funded by the Department of Biotechnology, the project involves collaboration with IIT-Bombay, RGCIRC-New Delhi, AIIMS-New Delhi, and PGIMER-Chandigarh.

    AI’s Role in Early Cancer Detection

    • Learning from Data: AI analyzes extensive datasets of radiological and pathological images to recognize features associated with various cancers.
    • Early Detection: By identifying tissue changes and potential malignancies, AI facilitates early cancer detection, crucial for effective treatment.

    TMH’s Implementation of AI

    • Data Annotation and Correlation: The team segments and annotates images, correlating them with biopsy results, histopathology reports, and genomic sequences to develop algorithms.
    • Clinical Utility: Algorithms developed from the bio-bank assess treatment responses and guide treatment plans, reducing unnecessary chemotherapy for predicted non-responders.

    Current Usage of AI in Cancer Detection

    • Radiation Reduction: TMH has used AI to reduce radiation exposure for pediatric patients undergoing CT scans by 40%.
    • Thoracic Radiology: An AI algorithm in the ICU for thoracic radiology provides immediate diagnoses with 98% accuracy after doctor validation.

    Future of AI in Cancer Treatment

    • Transformative Potential: AI is expected to tailor treatment approaches based on patient profiles, optimizing therapy outcomes, especially in rural India.
    • Simplifying Diagnosis: AI could enable general practitioners to diagnose complex cancers with a simple click, enhancing precision in cancer solutions.
    • Continuous Learning: As AI continuously learns and improves, it promises timely cancer diagnoses, better patient outcomes, and support for healthcare professionals.
    • Debates and Resistance: The use of AI tools in healthcare raises debates about the potential replacement of human radiologists and faces regulatory scrutiny and resistance from some doctors and health institutions.

    Conclusion

    • Enhancing Detection and Treatment: Tata Memorial Hospital’s AI-driven Bio-Imaging Bank represents a pioneering step in enhancing cancer detection and treatment, promising a future where technology significantly improves patient care and outcomes.
    • Balancing Technology and Human Expertise: While AI offers immense potential, it’s crucial to balance technological advancements with human expertise and address ethical and regulatory considerations to ensure the best possible care for patients.

  • IIT-D develops India’s first National Landslide Susceptibility Map

    Introduction

    • In the wake of severe monsoon-triggered landslides, IIT Delhi has developed its first National Landslide Susceptibility Map.

    About National Landslide Susceptibility Map

    • High-Resolution Mapping: The map offers a detailed (100 sq. m resolution) overview of landslide susceptibility across India, including previously unrecognized areas.
    • Revealing New Risk Zones: It highlights traditional high-risk areas and uncovers new regions of concern, broadening the scope of landslide monitoring.
    • Innovative Analysis Method: An ensemble machine learning approach was utilized to enhance prediction accuracy and address data gaps in uncharted regions.
    • Advantages of Ensemble Models: This method effectively combines multiple models to provide a more reliable estimation of landslide risks.

    Data Gathering and Analytical Process

    • Extensive Data Compilation: Researchers collated data on around 150,000 landslide incidents from various sources, including the Geological Survey of India.
    • Identifying Contributing Factors: The team pinpointed 16 critical factors influencing landslide susceptibility, utilizing tools like GeoSadak for remote data collection.

    Implications for Disaster Management

    • Tool for Stakeholders: The map serves as a critical resource for government bodies, disaster management authorities, and organizations focused on landslide mitigation.
    • Enhancing Preparedness and Planning: It will facilitate vulnerability assessment, infrastructure planning, and implementation of mitigation measures.

    Need for such map

    • Persistent Hazard: Landslides, affecting a small but significant portion of India, pose a recurrent threat, especially in hilly regions.
    • Challenges in Management: The localized and sporadic nature of landslides has historically hindered effective tracking and prediction, underscoring the need for a comprehensive mapping solution.

    Future Directions and Public Accessibility

    • Developing an Early Warning System: Building on the map, efforts are underway to create a comprehensive Landslide Early Warning System.
    • Infrastructure Vulnerability Cartogram: A cartogram to identify susceptible infrastructure is also in progress.
    • Public Access and Engagement: The map and its data will be accessible through a web interface, promoting public interaction and awareness.

  • Aditya-L1 successfully placed in a Halo Orbit around L1 Point

    aditya

    Introduction

    • The Indian Space Research Organisation (ISRO) has achieved a significant milestone by placing the Aditya-L1 spacecraft in a halo orbit around the Lagrangian point (L1).
    • Launched on September 2, 2023, Aditya-L1 reached the L1 point on January 6, after a 127-day journey covering 1.5 million km.

    What is a Halo Orbit?

    • Halo orbits are three-dimensional, periodic orbits around Lagrange points in a two-body system like Earth-Sun or Earth-Moon.
    • It is commonly linked with L1, L2, and L3 Lagrange points, where the gravitational forces of two large bodies and centrifugal force balance each other.
    • It provides a stable line of sight to Earth and the Sun, beneficial for continuous communication and solar power.
    • Unlike typical two-dimensional orbits, halo orbits form a 3D loop, resembling a halo around Lagrange points.
    • These orbits, especially around L1 and L2 points, require periodic adjustments for a spacecraft to maintain its trajectory.
    • It offers energy-efficient positions in space due to balanced gravitational forces, requiring minimal propulsion for orbit maintenance.
    • James Webb Space Telescope utilizes a halo orbit around the Earth-Sun L2 point for a stable observation position.

    Aditya-L1’s Mission Objectives and Operations

    • Orbit Characteristics: Aditya-L1 is in a periodic halo orbit around L1, approximately 1.5 million km from Earth, with an orbital period of about 177.86 days.
    • Mission Life and Goals: With a mission life of five years, Aditya-L1 aims to study the sun’s photosphere, chromosphere, and corona, along with in-situ studies of particles and fields at L1.
    • Continuous Solar Observation: The satellite’s position allows for uninterrupted solar observation, crucial for understanding solar activities and space weather dynamics.

    Understanding Lagrange Points and L1

    • Lagrange Points Explained: Lagrange Points are positions in space where a small object can maintain its position relative to two larger bodies due to the gravitational balance.
    • L1 Point Advantage: The L1 point, located about 1.5 million km from Earth, offers continuous solar viewing without occultation or eclipse, providing a strategic advantage for solar observation.

    Aditya-L1’s Journey Timeline

    • Launch and Initial Orbits: Following its launch, ISTRAC conducted four earth-bound maneuvers to position Aditya-L1 in progressively higher orbits.
    • Trans-Lagrangian1 Insertion: The spacecraft underwent a crucial manoeuvre on September 19, marking the start of its 110-day journey to L1.

    Why Study the Sun?

    • Understanding Solar Dynamics: Studying the sun is crucial for comprehending its energy production, temperature variations, and radiation emissions.
    • Monitoring Solar Activities: Continuous monitoring of solar flares and coronal mass ejections is vital for predicting space weather and mitigating its impact on space-reliant technologies.

    Conclusion

    • Unprecedented Solar Study: Aditya-L1’s unique position and advanced instruments enable an unparalleled study of the sun, contributing significantly to our understanding of solar phenomena.
    • ISRO’s Achievement: This successful mission underscores ISRO’s expertise in navigating complex space missions and reinforces India’s position as a leading player in space exploration and research.

  • SEBI strengthens regulations for Alternate Investment Funds (AIFs)

    Introduction

    • The Securities and Exchange Board of India (SEBI) has implemented its decisions, introducing significant changes to the regulations governing Alternate Investment Funds (AIFs).
    • These include extending the mandatory custodian appointment to smaller AIFs and requiring the dematerialization of AIF investments.

    About Alternative Investment Funds (AIFs)

    Details
    Definition AIFs are privately pooled investment vehicles established in India, collecting funds from sophisticated investors for investing.
    Regulation Governed by the SEBI (Alternative Investment Funds) Regulations, 2012.
    Formation Can be formed as a company, Limited Liability Partnership (LLP), trust, etc.
    Investor Profile Aimed at high rollers, including domestic and foreign investors in India. Generally favored by institutions and high net worth individuals due to high investment amounts.
    Categories of AIFs Category I: Invests in start-ups, early-stage ventures, SMEs, etc. Includes venture capital funds, angel funds, etc.

    Category II: Includes funds not in Category I/III, like real estate funds, debt funds, etc. No leverage or borrowing except for operational requirements.

    Category III: Employs complex trading strategies, may use leverage. Includes hedge funds, PIPE Funds, etc.
    Fund Structure Category I and II AIFs must be close-ended and have a minimum tenure of three years.

    Category III AIFs can be open-ended or close-ended.

    Extended Custodian Appointment Requirements

    • Previous Norms: Earlier, the mandatory custodian appointment was required for Category III AIFs and Category I and II AIFs with a corpus exceeding ₹500 crore.
    • New Extension: As of January 5, this requirement has been extended to all AIFs, regardless of their corpus size.

    Mandatory Dematerialization of Investments

    • Amendment to AIF Regulations: SEBI has amended its 2012 AIF Regulations to mandate that AIFs hold securities of their investments only in dematerialized form, with certain exceptions.
    • Exceptions: These include investments in instruments not eligible for dematerialization and those held by a liquidation scheme of AIF not available in dematerialized form.
    • Future Provisions: SEBI has also reserved the right to specify other investments or schemes that may be exempt from this dematerialization requirement.

    New Conditions for Custodian Appointment

    • Restrictions on Associates: AIFs can appoint a Custodian who is an Associate of a Manager or a Sponsor of an alternate fund only under specific conditions.
    • Net Worth and Independence Requirements: These conditions include the Sponsor or Manager having a minimum net worth of ₹20,000 crore and ensuring the Custodian’s independence from the Sponsor or Manager.

    Closing Regulatory Gaps

    • Addressing Past Breaches: The latest changes aim to close various regulatory gaps that previously allowed breaches in the spirit of the law and the use of investment vehicles to escape regulatory oversight.
    • RBI’s Complementary Measures: The Reserve Bank of India (RBI) has also tightened norms for banks and NBFCs investing in AIFs to prevent potential ever-greening and other regulatory circumventions.

  • Paleolithic Tools Discovered in Telangana’s Mulugu District

    Paleolithic

    Introduction

    • Floods Uncover Historical Artifacts: The recent floods in Mulugu district, Telangana, have led to the discovery of Paleolithic quartzite tools, shedding new light on the region’s ancient human habitation.
    • Discovery by Amateur Historians: The tools were found in a dried-up stream bed by a team led by Sriramoju Haragopal, an amateur historian.

    About Paleolithic Age

    Details
    Timeframe Approximately 2.6 million years ago to about 10,000 BCE.
    Characteristics Marked by the use of stone tools by early humans. Tools were mainly hand axes, cleavers, and choppers.
    Major Sites
    • Bhimbetka in Madhya Pradesh
    • Soan Valley in Punjab
    • Sites in Rajasthan, Karnataka, and Maharashtra
    • Narmada Valley in Central India
    • Attirampakkam in Tamil Nadu
    • Hunsgi in Karnataka
    • Kurnool in Andhra Pradesh
    • Didwana in Rajasthan
    • Belan Valley in Uttar Pradesh
    Lifestyle Nomadic hunter-gatherers; relied on hunting animals and gathering plants for food.
    Cultural Developments Development of basic stone tools and control of fire.
    Art and Symbolism Evidence of early art found in Bhimbetka rock shelters, with paintings and engravings.
    Climate and Environment Varied climatic conditions over millennia; included ice ages and warmer periods.
    Human Species Mainly Homo erectus and Homo sapiens.

    Details of the Discovery

    • Location of Find: The hand axes were discovered between Gurrevula and Bhupatipuram villages in Mulugu district.
    • Specific Find: Researchers found a significant stone axe measuring 15.5 cm in length, 11 cm in width, and 5.5 cm in thickness.

    Context and Comparison

    • Global Significance: Similar hand axes have been discovered worldwide, indicating a common tool type used by early humans for various purposes.
    • Historical Context in India: The first discovery of a Paleolithic site in India was in 1863 at Attirampakkam near Madras (now Chennai), with bifacial hand-axes dating back to about 15 lakh years, known as the Madras Hand-Axe Industry or Madrasian Culture.

    Historical Significance

    • Paleolithic Era Tools: According to paleontologists, the stone axe dates back to the Lower Paleolithic period, approximately 30 lakh years ago.
    • Tool Identification: The tools were identified based on their chipping style, material, and size, typical of Paleolithic hunter-gatherers who used heavy quartzite for large tools.

  • ISRO Successfully Tests Polymer Electrolyte Membrane Fuel Cell in Space

    Fuel Cell

    Introduction

    • The Indian Space Research Organisation (ISRO) has successfully tested a 100 W class Polymer Electrolyte Membrane Fuel Cell based Power System (FCPS) in space.
    • The FCPS was part of the POEM3 orbital platform, launched onboard PSLV-C58 on January 1, 2024.

    About FCPS Experiment

    • Primary Goal: The experiment aimed to assess the operation of Polymer Electrolyte Membrane Fuel cells in space and gather data for future mission designs.
    • Power Generation: During the test, 180 W power was generated using Hydrogen and Oxygen gases, providing valuable data on the performance of the power system.

    About Polymer Electrolyte Membrane (PEM) Fuel Cells

    Details
    Basic Principle Converts chemical energy from hydrogen into electrical energy, producing water and heat as byproducts.
    Key Components Membrane Electrode Assembly (MEA)

    Platinum-based catalyst

    Gas Diffusion Layers (GDLs)

    Bipolar Plates
    Operation Hydrogen Oxidation: At the anode, hydrogen molecules (H2) are split into protons (H+) and electrons (e-).

    Proton Conduction: The PEM allows only protons to pass through to the cathode, blocking electrons.

    Electron Flow: Electrons travel through an external circuit to the cathode, creating an electric current.

    Oxygen Reduction: At the cathode, oxygen molecules (O2) from the air combine with the protons and electrons to form water (H2O).

    Heat Production: The reaction generates heat, which can be used for heating purposes in some applications.
    Types of Membranes Perfluorosulfonic acid (PFSA) membranes (common)

    Hydrocarbon-based membranes (alternative)
    Advantages High power density

    Low operating temperatures (60-80°C)

    Zero emissions with pure hydrogen

    Applications in Space and Society

    • Multipurpose Space Use: Fuel cells are particularly suitable for human space missions, providing essential power, water, and heat from a single system.
    • Societal Benefits: They have significant potential for societal applications, including as replacements for conventional vehicle engines and in standby power systems.
    • Advantages over Batteries: Fuel cells offer range and refuelling times comparable to conventional engines and are expected to enable emission-free transportation.