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Type: Prelims Only

  • The Gompertz Model

    Why in the News?

    Indian researchers have developed a predictive model based on the Gompertz Model to estimate a newborn’s birth weight using routine pregnancy scans.

    What is the Gompertz Model?

    • It is a mathematical model developed by English mathematician Benjamin Gompertz in the early 19th century.
      • It was originally designed to model population growth in a constrained environment, such as a specific geographic region.
      • The model uses an S-shaped (sigmoid) curve to represent growth patterns that start slowly, accelerate, and then slow again as they approach a plateau.
    • Applications:
      • Biology: The Gompertz Model is used to study tumor growth and cell population dynamics, reflecting constrained growth in biological systems.
      • Epidemiology: Applied in predicting the spread of infectious diseases like COVID-19, capturing how transmission rates slow with interventions.
      • Ecology: Useful for modelling species population growth in habitats with limited resources, aiding conservation and ecosystem management.
      • Healthcare: Recently adapted to predict foetal birth weight, helping identify potential risks associated with low or high birth weight.
      • Aging Research: Employed to analyze mortality rates and lifespan patterns, contributing to studies on aging and longevity.

    Recent Research and Significance

    • Recent research has applied the Gompertz Model in predicting foetal birth weight using routine scans, as shown by researchers from IISER Pune and IMSc Chennai, offering a non-invasive alternative for maternal health.
    • The model is used in tumor growth studies, allowing researchers to understand and predict cancer progression.
    • Its predictive accuracy under constrained conditions makes it useful for biological systems, including population growth and cell dynamics.
    • In healthcare, it supports early detection and intervention for conditions impacted by growth patterns, such as low or high birth weight risks.

  • Glacial Lakes rise as glaciers retreat

    Why in the News?

    Since 1977, the South Lhonak Lake, a glacial lake in Sikkim has expanded significantly, growing from 17 hectares to 167 hectares by 2023.

    Formation of Glacial Lakes:

    • When a glacier melts and retreats, the hollow left behind often fills with water, creating a glacial lake.
    • The rocky moraine at the glacier’s end can act as a natural dam, holding the water to form the lake.
    • Glacial lakes act as hydrological buffers, regulating water flow from melting ice, which can sometimes pose challenges to downstream communities.
    • Glacial lakes often have a vivid blue color, similar to swimming pools, due to the scattering of light by fine rock particles (rock flour) in the water.
    • There are several types of glacial lakes, each formed by specific processes and glacier dynamics:
      • Moraine-Dammed Lakes: Formed when moraine debris piles up at the end of a glacier and traps meltwater behind it. These are common and pose risks of outburst flooding.
      • Kettle Lakes: This was created when a chunk of glacier ice is buried in the moraine and eventually melts, leaving a depression filled with water.
      • Cirque Lakes: Formed in circular basins (cirques) carved by glaciers at high elevations. These lakes are often small and located at the glacier’s original head.
      • Pro-glacial Lakes: Situated in front of the glacier, between the ice and the moraine dam. These lakes are sometimes formed when the glacier’s snout melts and deposits water in the valley.
      • Tarn Lakes: Formed in depressions left behind in the cirques or basins after the glacier has completely melted.

    Major Glacial Lakes in India

    India’s Himalayan region is home to numerous glacial lakes, each with unique characteristics:

    • Gurudongmar Lake (Sikkim): One of the highest lakes in the world at 5,430 meters above sea level, fed by glacial melt and known for its religious significance.
    • Chandra Taal (Himachal Pradesh): A stunning crescent-shaped lake in the Lahaul-Spiti region at 4,300 meters. It is surrounded by snow-capped mountains and fed by glacier melt.
    • Samiti Lake (Sikkim): Located along the trek to Kanchenjunga and known for its clear blue waters and reflective quality.
    • Satopanth Tal (Uttarakhand): Found in the Garhwal Himalayas, this lake lies close to Satopanth Glacier and is considered sacred by locals.
    • South Lhonak Lake (Sikkim): A growing lake fed by three glaciers, expanding rapidly due to climate change and posing risks of glacial lake outburst floods.

    PYQ:

    [2019]  Consider the following pairs:

    Glacier: River

    1. Bandarpunch: Yamuna
    2. Bara Shigri: Chenab
    3. Milam: Mandakini
    4. Siachen: Nubra
    5. Zemu: Manas

    Which of the pairs given above are correctly matched?
    (a) 1, 2 and 4 only
    (b) 1, 3 and 4 only
    (c) 2 and 5 only
    (d) 3 and 5 only

  • Sleep Apnea contributes to Dementia in older adults

    Why in the News?

    A recent study from Michigan Medicine found that Obstructive Sleep Apnea (OSA), a common sleep disorder, increases the risk of dementia (loss of cognitive functioning) in adults, especially in women.

    What is Obstructive Sleep Apnea (OSA)?

    • OSA is a sleep disorder where breathing repeatedly stops and starts during sleep due to blocked airways.
    • It is marked by episodes of disrupted or restricted breathing, leading to brief awakenings throughout the night.
    • Symptoms include loud snoring, gasping for air, morning headaches, and daytime drowsiness.
    • Risk Factors: Common in individuals who are overweight, have large tonsils or suffer from nasal congestion.
      • In India, approximately 10.4 lakh people are reported to suffer from OSA, as per government data.
      • Untreated OSA is associated with various health risks, including heart disease, diabetes, and cognitive decline.

    Recent Findings on OSA and Dementia Risk

    • A study from Michigan Medicine found a link between OSA and increased dementia risk, especially in older adults over 50.
      • Women with known or suspected OSA were found to have a higher likelihood of developing dementia compared to men, with dementia diagnoses increasing as women age.
    • Another study by NIMHANS focused on the link between stroke and OSA.
      • 105 stroke patients over the age of 50 were studied using polysomnography (PSG), which tracks brain waves and sleep breathing patterns.
      • Results showed that 88% of stroke patients had sleep apnea soon after their stroke, with 38% having severe OSA.

  • Indian Council of Social Science Research (ICSSR)

    Why in the news?

    Employees of the Indian Council of Social Science Research (ICSSR) institutions have expressed concerns over the delay in revising their pay scales.

    About the Indian Council of Social Science Research (ICSSR):

    Details
    Establishment It was established as an Autonomous organization, in 1969 on the recommendation of Prof. V. K. R. V. Rao Committee (National Income Committee).
    Nodal Ministry Operates under the Ministry of Education.
    Function Promote, fund, and support social science research in India.
    Objectives • Encourage social science research
    • Fund and coordinate research in various branches
    • Collaborate with international research organizations
    • Provide policy recommendations based on research
    Organizational Structure It is governed by a Council of eminent scholars and policymakers, supported by 24 research institutes and 6 regional centers.
    Research Institutes Funds institutes such as:
    • Centre for Development Studies (CDS), Thiruvananthapuram
    • Institute for Social and Economic Change (ISEC), Bengaluru
    • Centre for Studies in Social Sciences (CSSS), Kolkata
    • Gokhale Institute of Politics and Economics (GIPE), Pune
    Key Programs and Initiatives • ICSSR Data Service: National repository for social science data
    • NASSDOC: Documentation and library services
    • Workshops and conferences to enhance research capabilities
    International Collaboration Collaborates with organizations like UNESCO and the Indian Council of World Affairs for joint projects and scholar exchanges.

     

    PYQ:

    [2013] Which of the following bodies is/are not mentioned in the Indian Constitution?

    1. National Development Council

    2. Planning Commission

    3. Zonal Councils

    Select the correct answer using the codes given below:

    (a) 1 and 2 only

    (b) 2 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

  • [pib] Exercise GARUD SHAKTI 24

    Why in the News?

    The Indian Army contingent has departed for Cijantung, Jakarta, Indonesia to take part in the 9th edition of India-Indonesia Joint Special Forces Exercise GARUD SHAKTI 24.

    Note: 

    • Exercise Garuda is a bilateral air force exercise between the Indian Air Force and the French Air and Space Force.
    • Exercise Shakti is a biennial training event conducted alternatively in India and France.

    About Exercise GARUD SHAKTI 24

    Details
    What is it? A bilateral joint special forces exercise between India and Indonesia aimed at enhancing military cooperation.

    Held alternatively in India and Indonesia.
    History Initiated in 2012 as part of defense cooperation between India and Indonesia.
    Objectives • Enhance mutual understanding and cooperation between special forces
    • Share best practices and experiences in counter-terrorism
    • Conduct joint operations and drills to improve interoperability
    Activities • Joint planning and execution of special operations
    • Orientation on advanced special forces skills
    • Sharing information on weapons, tactics, and techniques
    • Operations practice in diverse terrains
    • Cultural exchanges between troops
    Significance • Strengthens bilateral relations
    • Fosters trust between India and Indonesia
    • Contributes to regional security and addresses terrorism challenges
    • Enhances operational capabilities of both armies
    Recent Edition Ninth Edition (2024): Scheduled from November 1 to 12, focusing on enhancing understanding, cooperation, and interoperability.

     

    PYQ:

    [2024] Which of the following statements about the Exercise Mitra Shakti-2023 is/ are correct?

    1. This was a joint military exercise between India and Bangladesh.
    2. It commenced in Aundh (Pune).
    3. Joint response during counter-terrorism operations was a goal of this operation.
    4. Indian Air Force was a part of this exercise.

    Select the answer using the code given below:

    (a) 1, 2 and 3

    (b) 1 and 4

    (c) 1 and 4

    (d) 2, 3 and 4

  • [pib] Exercise VAJRA PRAHAR

    Why in the News?

    The Indian Army contingent departed today for the 15th edition of VAJRA PRAHAR, a joint Special Forces exercise with the US Army.

    About Exercise VAJRA PRAHAR:

    Details
    What is it? A joint Special Forces exercise between India and the US aimed at enhancing military cooperation.
    Inception
    • Started in 2010 as part of bilateral defense cooperation between India and the US.
    • No exercises held between 2012 and 2015 and in 2020.
    Frequency Conducted annually, alternately in India and the United States.
    15th Edition Dates Scheduled from 2nd to 22nd November 2024 at the Orchard Combat Training Centre, Idaho, USA.
    Participants 45 personnel from each country; Indian Army’s Special Forces and US Army’s Green Berets.
    Objectives • Enhance military cooperation
    • Promote interoperability and tactical exchange
    • Improve combined capabilities in joint operations
    Key Focus Areas • High physical fitness standards
    • Joint planning and tactical drills
    Significance • Joint Team Mission Planning
    • Reconnaissance Missions
    • Use of Unmanned Aerial Systems (UAS)
    • Execution of Special Operations
    • Roles of Joint Terminal Attack Controllers
    • Psychological Warfare

  • What is Chronic Wasting Disease (CWD)?

    What is Chronic Wasting Disease (CWD)?

    Why in the News?

    A case of Chronic Wasting Disease (CWD) was confirmed in the US.

    About Chronic Wasting Disease (CWD)

    • CWD is a fatal, transmissible disease that affects the brain and central nervous system of deer, elk, and moose.
    • First identified in 1967, CWD is a prion disease where normal proteins misfold, leading to symptoms that eventually cause death.
    • Transmission occurs through animal-to-animal contact or contamination of feed or water by infected saliva or bodily waste.
    • Environmental contamination can occur through soil exposure from infected carcasses or bodily fluids.
    • High-risk areas include places where deer and elk gather closely, like feeding or watering sites.
    • Species affected: CWD does not naturally infect cows, other livestock, or pets.
    • Although no strong evidence exists that it can spread to humans, officials advise against eating meat from infected animals.

    Symptoms of CWD:

    • Symptoms: Drastic weight loss, lack of coordination, drooling, listlessness, and excessive thirst. Infected animals may also show drooping ears and lose their fear of humans.
      • Prevention: To prevent the spread of CWD, avoid handling or eating sick animals, use synthetic lures, dispose of carcass waste in landfills, and report any sick or unusual deer to local wildlife authorities.

    PYQ:

    [2012] Vultures which used to be very common in Indian countryside some years ago are rarely seen nowadays. This is attributed to:

    (a) The destruction of their nesting sites by new invasive species

    (b) A drug used by cattle owners for treating their diseased cattle

    (c) Scarcity of food available to them

    (d) A widespread, persistent and fatal disease among them

  • Mount Fuji

    Mount Fuji

    Why in the News?

    Japan’s iconic Mount Fuji has set a new record for the longest delay in snowfall since records began in 1894.

    Why delay in snowfall at Mount Fuji? 

    • Higher Temperatures: Japan’s hottest summer on record and above-average October temperatures have delayed the cooling needed for snow.
    • Heatwave: Japan experienced numerous “extremely hot” days with temperatures exceeding 35°C, even into September.
    • Jet Stream Shift: A northerly shift in the sub-tropical jet stream brought warmer air over Japan, further hindering snow formation.

    About Mount Fuji:

    Details
    Location Honshu Island, Japan, about 100 kilometers (62 miles) southwest of Tokyo.
    Height 3,776 meters (12,389 feet), making it the tallest mountain in Japan.
    Type of Volcano Stratovolcano, characterized by a conical shape formed from alternating layers of lava flow, ash, and tephra.
    Eruptions Last major eruption occurred in 1707 (Hoei eruption), causing ash to fall on Edo (now Tokyo).
    Geological Formation Formed through volcanic eruptions over thousands of years; current shape solidified around 300,000 years ago.
    Climate Varied climate with decreasing temperatures at higher altitudes; snow caps the summit from November to May.
    Surrounding Area Part of Fuji-Hakone-Izu National Park; surrounded by five lakes: Lake Kawaguchi, Lake Yamanaka, Lake Sai, Lake Shoji, and Lake Motosu.
    Cultural Significance • National symbol of Japan
    • Sacred in Shintoism, associated with the deity Konohanasakuya-hime
    • Known as one of Japan’s Three Holy Mountains
    Art and Literature A popular subject in traditional Japanese art (e.g., Hokusai’s Thirty-Six Views of Mount Fuji), referenced in poetry and literature.
    UNESCO World Heritage Site Designated as a UNESCO World Heritage Site in 2013 for its cultural significance and beauty.
    Cultural Festivals Hosts various festivals, such as the Fuji Shiba-sakura Festival, celebrating local flora.

     

    PYQ:

    [2021] Mention the global occurrence of volcanic eruptions in 2021 and their impact on regional environment.

  • Who were Velu Nachiyar and Anjalai Ammal?

    Who were Velu Nachiyar and Anjalai Ammal?

    Why in the News?

    Superstar Thalapathy Vijay launched his new party with speech highlighting his inspirations from Rani Velu Nachiyar and Anjalai Ammal.

    Contributions of Velu Nachiyar (1730-1796)

    • Born in 1730 to King Chellamuthu Sethupathy and Queen Sakandhimuthal of the Ramnad kingdom (now Tamil Nadu).
    • Trained in horse riding, archery, kalaripayattu, and silambam (South Indian martial arts).
    • Educated as a polyglot, fluent in Tamil, Urdu, English, and French, with a strong grasp of military strategy.
    • Married Muthu Vaduganatha Periyavudaya Thevar in 1746, supporting him as Queen of Sivagangai.
    • In 1772, Sivagangai was invaded by the British East India Company in alliance with the Nawab of Arcot; her husband was killed in battle.
    • Fled with her daughter Vellachi to Dindigul under the protection of Hyder Ali of Mysore.
    • Formed alliances with Hyder Ali and Gopala Naicker of the Marudu brothers to reclaim her kingdom.
    • Successfully fought against the British and reclaimed Sivagangai in 1780.
    • Ruled for a decade before passing the throne to her daughter in 1790.
    • Known as Tamil Nadu’s ‘Veeramangai’ (Brave Lady) and celebrated as an early Indian queen who resisted British colonialism.

    Significant role played by Anjalai Ammal (1890-1961)

    • Born in 1890 in Cuddalore, Tamil Nadu, to a weaver family.
    • Married Murugappan in 1908, and both joined the freedom struggle inspired by Mahatma Gandhi’s principles.
    • Became active in the Non-Cooperation Movement in 1921, marking the beginning of her political involvement.
    • Played a significant role in:
      • Neil Statue Satyagraha, protesting a statue of Colonel James Neil.
      • Salt Satyagraha in 1930 and the Quit India Movement in 1942.
    • Served as President of the All India Women’s Congress in Madras in 1931.
    • Arrested multiple times for her activism; gave birth to her youngest son while serving a six-month prison term.
    • Prevented by the British from meeting Gandhi in 1934; met him in disguise, and he called her “South India’s Rani of Jhansi”.
    • First woman elected to the Madras legislature as a Congress representative.
    • Remained politically active until her death in 1961, remembered as a pioneer for women’s rights and freedom.

    PYQ:

    [2016] Discuss the role of women in the freedom struggle especially during the Gandhian phase.

    [2015] Consider the following statements:

    1. The first woman President of the Indian National Congress was Sarojini Naidu.

    2. The first Muslim President of the Indian National Congress was Badruddin Tyabji.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 only

    (c) Both 1 and 2

    (d) Neither 1 nor 2

  • What is DANA?

    Why in the News?

    The extreme conditions in eastern Spain which saw Valencia get a year’s worth of rain in just 8 hours can be blamed on an event locally known as Depresion Aislada en Niveles Altos (DANA).

    What is DANA?

    • Depresion Aislada en Niveles Altos (DANA), is commonly referred to as the “cold drop” in English.
    • It is a meteorological phenomenon in the western Mediterranean region that brings intense rainfall and flooding.
    • The term “DANA” was coined by Spanish meteorologists to specifically describe this weather phenomenon.

    Features and Location:

    • DANA occurs when cold air from the Polar Regions separates from the polar jet stream and descends over the warmer Mediterranean Sea.
    • The contrast between cold air aloft and warm, moist air near the surface causes atmospheric instability, leading to the rapid formation of cumulonimbus clouds and intense thunderstorms.
    • It primarily affects Spain and Portugal but can also impact Italy, France, and other areas around the Mediterranean Sea.
    • This occurs in autumn and spring, as temperature variations are more pronounced during these seasons.

    PYQ:

    [2014] The seasonal reversal of winds is the typical characteristic of:

    (a) Equatorial climate

    (b) Mediterranean climate

    (c) Monsoon climate

    (d) All of the above climates