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Type: Prelims Only

  • C-295 Transport Aircraft: All you need to know

    c-195

    Central Idea

    • In a significant milestone, the Indian Air Force (IAF) received its inaugural C-295 transport aircraft during a ceremony held in Seville, Spain.
    • IAF’s fleet of C-295s is set to become the largest globally, with an initial order for 56 aircraft.

    About C-295

    • The C-295MW is a transport aircraft with a carrying capacity ranging from 5 to 10 tonnes.
    • It can accommodate up to 71 troops or 49 para-troopers, offering significant flexibility.
    • The aircraft boasts a maximum cruise speed of 260 knots, ensuring rapid deployment.
    • Its exceptional low-level flight characteristics enable tactical missions, even at slow speeds as low as 110 knots.
    • The C-295 is equipped with a rear ramp door, facilitating swift troop and cargo deployments.
    • Each aircraft is outfitted with an indigenous Electronic Warfare Suite developed by Bharat Electronics Ltd and Bharat Dynamics Limited.
    • Two Pratt & Whitney Canada PW127G turboprop engines propel the aircraft.
    • The C-295 exhibits short take-off and landing (STOL) capabilities, enabling the use of unprepared airstrips.

    Significance of the aircraft

    • India’s entry into aircraft production will place it among a select group of nations with the capability to manufacture C-295 aircraft.
    • This group includes countries like the US, UK, Russia, France, Italy, Spain, Ukraine, Brazil, China, and Japan.
    • The project will stimulate India’s aerospace ecosystem, involving numerous MSMEs across the country in the manufacturing of aircraft components.
    • This includes areas of strategic importance, such as the border with China and the Andaman and Nicobar archipelago.

  • International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA)

    Central Idea

    • In a global seminar organized by the International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA) and the Food and Agriculture Organisation (FAO), President of India underscored the importance of safeguarding farmers’ rights.

    About ITPGRFA

    Description
    Objective Conservation and sustainable use of plant genetic resources for food and agriculture.
    Enactment Year 2001
    Key Principles Conservation, Access and Benefit-Sharing, Farmers’ Rights.
    Coverage Multilateral system covering 64 vital crop species.
    Implementation Encourages signatory countries to integrate treaty provisions into national legislation.
    Monitoring Establishes a system for monitoring treaty implementation and reporting.
    Global Impact Contributes to preserving agricultural biodiversity, sustainable agriculture, and equitable access to genetic resources.
    India’s Role India actively participates and supports the treaty, providing rights to farmers for unbranded seeds and registering their varieties, serving as a model for the world.

  • Nipah breaks out again in Kerala

    nipah

    Central Idea

    • The reappearance of Nipah infection in Kerala, with two confirmed deaths and two individuals under treatment, has raised concerns about this lethal viral disease.
    • Nipah, while not as contagious as COVID-19, is significantly more deadly, with a case fatality rate ranging from 40% to 75%.

    What is Nipah Virus Infection?

    • Nipah is a zoonotic disease, meaning it is transmitted to humans through infected animals or contaminated food.
    • Direct person-to-person transmission through close contact with an infected individual is also possible.
    • Symptoms include fever, headache, cough, sore throat, difficulty in breathing, and vomiting.
    • In severe cases, Nipah infection can progress to disorientation, drowsiness, seizures, and encephalitis (brain swelling), ultimately leading to coma and death.

    Transmission of Nipah Virus

    • Historical Outbreaks: The Nipah virus was first reported in Malaysia (1998) and Singapore (1999), deriving its name from a Malaysian village where it was first isolated. The primary mode of transmission from animals to humans is through the consumption of contaminated food. This can occur via the consumption of raw date palm sap or fruit contaminated with saliva or urine from infected bats.
    • Animal Host Reservoir: Fruit bats, commonly known as flying foxes, are the known hosts of the virus. They transmit it to other animals like pigs, dogs, cats, goats, horses, and sheep. Human infection usually occurs through direct contact with these animals or the consumption of food contaminated by their saliva or urine. Human-to-human transmission is also documented, particularly in families and healthcare settings.

    Nipah Virus Spread and Mortality

    • Slow Spread: Unlike the rapid transmission of SARS-CoV-2, the Nipah virus spreads more slowly. However, its high mortality rate is a significant concern.
    • High Mortality: During outbreaks, Nipah has shown a mortality rate as high as 68-75%. For example, in the 2001 Siliguri outbreak, 45 of the 66 infected individuals succumbed to the virus. Similarly, during the 2018 Kerala outbreak, 17 of the 18 confirmed patients died.
    • Localized Outbreaks: Notably, Nipah outbreaks have remained localized and were contained relatively quickly. The virus’s limited infectiousness and low human-to-human transmission contribute to this containment.
    • Reproductive Number (R0): Studies indicate an R0 of about 0.48 for Nipah outbreaks, signifying a slow rate of transmission within the population. An R0 value below one suggests that an infected person does not infect more than one other individual, leading to a relatively rapid end to the outbreak.
    • High Death Rates Limit Transmission: The virus’s high death rates also play a role in restricting its transmission.

  • IISc develops Hybrid Nanoparticles to detect and kill cancer cells

    Nanoparticles

    Central Idea

    • Researchers at the Indian Institute of Science (IISc) have pioneered a novel approach with the potential to detect and eradicate cancer cells, particularly those forming solid tumour masses.

    Gold and Copper Sulfide Nanoparticles

    • Innovative Nanoparticles: IISc scientists have engineered hybrid nanoparticles that blend gold and copper sulfide, resulting in multifunctional nanoparticles with promising implications for cancer detection and treatment.
    • Photothermal and Oxidative Properties: These nanoparticles exhibit photothermal capabilities, where they absorb light and convert it into heat, effectively killing cancer cells. Moreover, they produce singlet oxygen atoms, which further contribute to the cells’ toxicity.
    • Combining Mechanisms: The nanoparticles employ both photothermal and oxidative mechanisms to target and eliminate cancer cells effectively.

    Revolutionizing Cancer Diagnosis

    • Ultrasound Waves: Beyond cancer treatment, these hybrid nanoparticles hold potential for cancer diagnosis. Their photoacoustic property enables them to absorb light and generate ultrasound waves.
    • High Contrast Detection: The ultrasound waves enhance the contrast for detecting cancer cells once the nanoparticles reach them. This method offers superior image resolution compared to traditional CT and MRI scans.
    • Clarity and Oxygen Saturation Measurement: Scans generated through ultrasound waves boast greater clarity and the ability to measure oxygen saturation within tumors, enhancing cancer detection accuracy.
    • Integration with Existing Systems: The nanoparticles can be seamlessly integrated with current detection and treatment systems. For instance, endoscopes used for cancer screening can trigger nanoparticle-induced heat generation with focused light.

    Overcoming Size Limitations

    • Size Advantages: These hybrid nanoparticles, measuring less than 8 nm, possess a critical advantage in terms of mobility within tissues and their ability to reach tumors.
    • Potential Safe Elimination: Due to their diminutive size, researchers anticipate that these nanoparticles can exit the human body naturally without accumulating. However, extensive safety studies are essential to confirm their suitability for internal use.
    • Successful Lab Testing: In laboratory settings, the researchers conducted successful tests using these nanoparticles on lung and cervical cancer cell lines, demonstrating their potential.
    • Clinical Development: The promising outcomes from this study propel the nanoparticles closer to clinical development.

  • What are Picoflare Jets?

    picoflares

    Central Idea

    • A recent revelation from the Solar Orbiter Aircraft, a collaborative endeavour between the European Space Agency and NASA, has illuminated the Picoflare jets erupting from the sun’s outer atmosphere.
    • These jets, marked by their supersonic emergence and brief durations of 20 to 100 seconds, have captured the attention of scientists and space enthusiasts alike.

    What are Picoflare Jets?

    • Picoflare jets, observed amidst emissions from the observed coronal hole, are diminutive in scale but pack a potent punch.
    • Their ephemeral existence belies their significance, as scientists have calculated that they contribute a substantial portion of the solar winds’ energy.
    • These solar emanations earned their name, “picoflare jets,” owing to their energy levels, which hover around one-trillionth of the solar flares’ immense energy potential.
    • Solar winds, driven by strong gusts, can not only craft auroras in Polar Regions but also disrupt Earth’s magnetic field and jeopardize electronic systems on satellites and terrestrial circuits.

    About Solar Orbiter Aircraft

    • A Stellar Journey: Launched in 2020, the Solar Orbiter Aircraft embarks on a mission to capture unprecedented images of the Sun, propelling closer than any previous spacecraft.
    • Instrumentation Excellence: Equipped with six remote-sensing instruments and four sets of in situ instruments, the spacecraft is primed for comprehensive solar exploration.
    • Mission Objectives: The Solar Orbiter Aircraft carries two primary objectives: to scrutinize the Sun’s 11-year cycle of magnetic activity ebbs and flows and to delve into the mysteries of the solar corona, the upper echelon of the Sun’s atmosphere.

  • Non-Reciprocity: The physics of letting waves go one way but not the other

    reciprocity

    Central Idea

    • Reciprocity, a fundamental principle of physics, dictates that if a signal can travel from Point A to Point B, it can also journey from Point B to Point A.
    • This intuitive concept holds significance in various aspects of daily life and serves as the basis for many technological breakthroughs and challenges.

    Exploring Reciprocity

    • The Principle Defined: Reciprocity posits that a signal transmitted from a source (Point A) to a destination (Point B) can also travel in the reverse direction by merely swapping the positions of the source and destination.
    • Everyday Analogies: Familiar scenarios, such as shining a torchlight or observing an object under a streetlight, exemplify reciprocity in action.
    • Counterintuitive Instances: Some situations defy intuition, like interrogation scenes in movies where one party can see through a window while the other cannot, or observing someone walking in darkness.

    Applications in Antennas and Beyond

    • Antennas: Reciprocity plays a pivotal role in antenna technology, enabling both the transmission and reception of signals. Engineers utilize reciprocity to assess antennas’ reception quality, simplifying testing processes for radar, sonar, seismic surveys, and MRI scanners.
    • Challenges in Spying: While reciprocity aids signal reception, it poses challenges in espionage, as it allows signals to be captured from an enemy base while potentially revealing one’s own location.
    • One-Way Traffic: To counteract reciprocity, scientists employ devices composed of components with specific properties. These devices break reciprocity, enabling signals to travel in one direction only.

    Diverse Ways to Break Reciprocity

    • Magnet-Based Non-Reciprocity: Utilizing wave plates and Faraday rotators, this method disrupts reciprocity for electromagnetic waves.
    • Modulation: By continuously altering a medium’s parameters in time or space, modulation offers a means to control signal transmission.
    • Nonlinearity: Varying a medium’s properties based on signal strength and direction introduces nonlinearity, another avenue to break reciprocity.

    Revolutionizing Technologies

    • Quantum Computing: Non-reciprocal devices find applications in quantum computing, where they amplify signals to detect quantum states effectively.
    • Miniaturization: The trend towards nanoscale and microscale devices includes non-reciprocal components, some as small as a strand of hair divided by a thousand. These miniature devices promise contributions to fields like self-driving cars, where efficient signal monitoring is essential for safety.

  • Greshams Law: What happens when governments fix Currency Exchange Rates?

    gresham's law

    Central Idea

    • The law, named after English financier Thomas Gresham, came into play most recently during the economic crisis in Sri Lanka last year.
    • The Central Bank of Sri Lanka has fixed the exchange rate between the Sri Lankan rupee and the U.S. dollar

    About Gresham’s Law

    • Thomas Gresham: The law is named after Thomas Gresham, an English financier who advised the English monarchy on financial matters. It extends beyond paper currencies and applies to commodity currencies and various goods.
    • Bad money drives out good: This maxim illustrates a phenomenon that occurs when government-fixed exchange rates diverge from market exchange rates, causing undervalued currency to be withdrawn from circulation.
    • Arbitrarily Fixed Prices: Gresham’s Law operates whenever governments arbitrarily set prices, causing a commodity to become undervalued compared to its market exchange rate. This undervaluation drives the commodity out of the formal market.
    • Black Market: In such scenarios, the only way to acquire the undervalued commodity is through the black market, as it is no longer available through official channels.
    • Goods Outflow: Countries can also experience the outflow of certain goods when their prices are forcibly undervalued by the government.

    Application to Commodity Money

    • Gold and Silver Coins: Gresham’s Law is particularly evident when a government fixes the exchange rate of commodity money, like gold and silver coins, well below their market value. In response, people may hoard or melt these coins to obtain their intrinsic value, which is higher than the government-set rate.

    Recent Example in Sri Lanka

    • Economic Crisis in Sri Lanka: Gresham’s Law was observed during the economic crisis in Sri Lanka, where the central bank fixed the exchange rate between the Sri Lankan rupee and the U.S. dollar.
    • Rupee Overvaluation: The government mandated that the price of the U.S. dollar should not exceed 200 Sri Lankan rupees, even though the black market rate indicated a higher value. This overvaluation of the rupee led to a decline in the supply of dollars and pushed the U.S. dollar out of the formal foreign exchange market.
    • Black Market Transactions: Individuals seeking U.S. dollars for foreign transactions were compelled to purchase them from the black market at rates exceeding 200 Sri Lankan rupees per dollar.

    Conditions for Gresham’s Law to Apply

    • Government-Imposed Fixed Rates: Gresham’s Law operates when government authorities establish and enforce fixed exchange rates between currencies.
    • Effective Implementation: Effective enforcement of these rates by authorities is essential for the law to take effect.

    Anti-thesis Concept: Thiers’ Law

    • “Good Money Drives Out Bad”: In the absence of government-imposed exchange rate fixes, the opposite phenomenon occurs. People tend to abandon currencies they perceive as of lower quality in favour of those they consider better, leading to the dominance of “good money.”
    • Thiers’ Law: This concept, known as Thiers’ Law and named after French politician Adolphe Thiers, complements Gresham’s Law.

  • Assistance to States during Natural Disasters: How It Works

    Central Idea

    • In the wake of natural disasters, states often request assistance from the central government.
    • Himachal Pradesh CM recently requested for a special disaster relief package and urged the designation of the calamity as a ‘national disaster.’

    Natural Disaster Mitigation in States

    • Legal Framework: The 2005 Disaster Management Act provides the legal framework for addressing disasters, whether natural or man-made.
    • Defining disaster: It defines a “disaster” as an event causing substantial loss of life, human suffering, property damage, or environmental degradation beyond the community’s coping capacity.
    • National Disaster Management Authority (NDMA): The Act established the NDMA, headed by the Prime Minister, and State Disaster Management Authorities (SDMAs) led by Chief Ministers. These bodies, along with district-level authorities, form an integrated disaster management setup in India.
    • National Disaster Response Force (NDRF): The Act led to the creation of the NDRF, comprising several battalions or teams responsible for on-ground relief and rescue operations in various states.

    Understanding the National Disaster Relief Fund (NDRF)

    • Mention in the Act: The NDRF is referenced in the 2005 Disaster Management Act and plays a crucial role in providing disaster relief.
    • State Disaster Relief Funds (SDRFs): States have their own SDRFs, which are the primary funds available for responding to notified disasters. The Central Government contributes 75% to SDRFs in general states and 90% in northeastern and Himalayan states.
    • Utilization of SDRFs: SDRFs are allocated for immediate relief efforts following notified calamities, including cyclones, droughts, earthquakes, fires, floods, tsunamis, and more.
    • Central Assistance: In the event of a severe calamity where state SDRF funds are insufficient, additional central assistance can be provided by the National Disaster Response Fund (NDRF).

    Who determines a Severe Calamity?

    • Procedure: States follow a specific procedure to classify a calamity as “severe.” This involves submitting a memorandum detailing sector-wise damage and fund requirements. An inter-ministerial central team assesses the damage on-site.
    • Committee Approval: Specific committees review these assessments and submit reports. A High-Level Committee must approve the immediate relief amount to be released from the NDRF.
    • Criteria: The classification of a calamity as “severe” considers factors such as intensity, magnitude, assistance needs, and more.

    Additional Funds for Disaster Mitigation

    • Funds Allocation: Funds for NDRF and SDRFs, allocated for preparedness, mitigation, and reconstruction, are part of budgetary allocations.
    • Financing mechanism: The 15th Finance Commission introduced a new methodology for state-wise allocations, considering factors like past expenditure, risk exposure, hazard, and vulnerability.
    • Utilization: NDRF and SDRF funds are released in two equal instalments, typically with requirements like Utilization Certificates. However, in urgent situations, these requirements can be waived.
    • State Disaster Mitigation Fund (SDMF): This fund supports activities such as forest restoration and public awareness. It received an allocation of Rs 32,030 crore from the 15th Finance Commission.
    • National Disaster Mitigation Fund (NDMF): The NDMF, amounting to Rs 13,693 crore, is dedicated to national disaster mitigation efforts.

  • Ancient India-Europe Maritime Trade Route

    europe trade

    Central Idea

    India- Europe: Glimpse into Historical Trade Route

    • Early Discoveries: The trade between Rome and India during antiquity was established by early excavations. Sir Mortimer Wheeler’s work at Arikamedu in the 1930s and 40s confirmed the existence of Indo-Roman trade in the 1st century CE.
    • Recent excavations: Ongoing archaeological excavations, such as those at Muziris in Kerala and Berenike in Egypt, continue to yield new evidence.
    • Revised Understanding: However, early interpretations often overlooked the agency of Indian merchants and ship owners in this trade. Recent discoveries have expanded and corrected our understanding of this ancient trade network.
    • Staggering Scale: Recent estimates, supported by the Muziris Papyrus, reveal the immense scale of the Red Sea trade. Custom taxes on goods from India, Persia, and Ethiopia possibly contributed up to one-third of the Roman exchequer’s income.

    Details unveiled by Muziris Excavations

    • Custom Taxes: The Muziris Papyrus detailed a cargo’s value, highlighting its enormous worth, with one cargo alone being equivalent to the purchase of premium farmland in Egypt or a prestigious estate in central Italy.
    • Roman Revenue: The import tax collected on this cargo alone exceeded two million sesterces. Extrapolating from these figures, Indian imports into Egypt were likely worth over a billion sesterces annually, with tax authorities generating 270 million sesterces.
    • Comparative Significance: These revenues surpassed those of entire subject countries, emphasizing the pivotal role of this trade route in sustaining the Roman Empire’s vast conquests and legions.
    europe trade ancient muziris
    Muziris Papyrus

    Trade details

    • Peak Period: During the 1st and 2nd centuries CE, a maritime highway connected the Roman Empire and India through the Red Sea. This route witnessed hundreds of ships travelling in both directions annually.
    • Traded Goods: The Romans had a great demand for Indian luxuries, including perfumes, ivory, pearls, gemstones, and exotic animals like elephants and tigers. Pepper, India’s major export, was particularly sought after, finding its way into Roman cuisine.
    • Trade from Rome: The flow of goods from Rome to India was limited, with gold being a prominent export. Roman wine was one notable exception, appreciated by Indians.

    Pre-Common Era Trade

    • Early Indian Diaspora: Evidence suggests the existence of an Indian diaspora in the Middle East during the time of the Indus Valley Civilization (c. 3300-1300 BCE). This early trade was coastal and involved smaller quantities of goods.
    • Roman Period Expansion: The trade expanded significantly during Roman times, facilitated by large cargo ships directly connecting the subcontinent and the Roman Empire. Romans played a key role in industrializing this trade.
    • Post-Conquest Peak: The conquest of Egypt by the Romans in the 1st and 2nd centuries CE opened up the route to India, leading to a substantial increase in trade.

    Organization and Duration of Journeys

    • Highly Organized Trade: Contracts were established between Indian merchants in Kerala and shippers in Alexandria. Goods were transported in containers, similar to modern practices, with references to insurance.
    • Understanding Monsoons: Indians recognized the monsoon winds’ seasonal patterns, enabling them to navigate the route efficiently. The journey to Egypt took approximately six to eight weeks, depending on favorable wind conditions.
    • Extended Stays: Indian diaspora rented houses in Egyptian ports while waiting for wind patterns to shift, allowing for the integration of Indian culture into these regions.

    Roles of Indians in the Trade

    • Indian Seafaring Culture: Evidence suggests that Indian dynasties were interested in seafaring, as depicted in Ajanta paintings and early Indian coin designs featuring ships.
    • Indian Sailors: Graffiti left by Indian sailors, primarily Gujaratis from Barigaza (modern-day Bharuch), has been discovered in the Hoq caves on the island of Socotra, emphasizing their active participation in the trade network.

    Comparing with the Silk Road

    • Indian Centrality: The ancient economic and cultural hub of Asia, the Indian subcontinent, and its ports played a central role in maritime East-West exchange. The concept of the “Silk Road” is relatively recent and inaccurately portrays the ancient trade routes.
    • Historical Invisibility: The Silk Road concept was coined in the late 19th century and did not exist in ancient or medieval times. It gained popularity in the 20th century, fostering romanticized ideas about East-West connectivity.
    • Recent Politicization: Chinese President Xi Jinping’s Belt and Road Initiative has politicized the Silk Road, making it a central component of Chinese foreign policy.

  • Deadly Earthquake strikes Morocco

    morocco earthquake

    Central Idea

    • A devastating earthquake struck Morocco, resulting in significant casualties and damage.

    Details of the Moroccan Earthquake

    • Shallow Epicenter: The quake’s epicentre was near the town of Ighil, approximately 70 km southwest of Marrakech. It was considered fairly shallow, with varying depth estimates.
    • Higher Energy: Shallow earthquakes are typically more dangerous as they carry more energy, making them more destructive compared to deeper quakes.

    Major Causes

    • Tectonic Convergence: The earthquake resulted from the northward convergence of the African plate with the Eurasian plate along a complex plate boundary.
    • Faulting: The USGS attributed the quake to oblique-reverse faulting at a shallow depth within the Moroccan High Atlas Mountain range.
    • Fault Classification: Oblique-slip faults exhibit characteristics of both dip-slip and strike-slip faults, occurring in areas of compression where tectonic plates converge.

    Why discuss this?

    • Low Seismicity: Earthquakes are uncommon in North Africa, with low seismicity rates along the northern margin of the continent.
    • Historic Strength: This earthquake was the strongest ever recorded in the mountainous region, catching Morocco unprepared for such an event.
    • Construction Vulnerabilities: Many Moroccan buildings, especially in rural areas and older cities, are not constructed to withstand strong tremors.

    What is an Earthquake?

    • An earthquake is an intense shaking of the ground caused by movement under the earth’s surface.
    • It happens when two blocks of the earth suddenly slip past one another.
    • This releases stored-up ‘elastic strain’ energy in the form of seismic waves, which spreads through the earth and cause the shaking of the ground.

    morocco earthquake

    What exactly causes Earthquakes?

    • As we know, the earth’s outermost surface, crust, is fragmented into tectonic plates.
    • The edges of the plates are called plate boundaries, which are made up of faults.
    • The tectonic plates constantly move at a slow pace, sliding past one another and bumping into each other.
    • As the edges of the plates are quite rough, they get stuck with one another while the rest of the plate keeps moving.
    • Earthquake occurs when the plate has moved far enough and the edges unstick on one of the faults.
    • The location below the earth’s surface where the earthquake starts are called the hypocenter, and the location directly above it on the surface of the earth is called the epicentre.