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  • Scientists devise ‘Glowscope’ to bring fluorescent microscopy to schools

    microscope

    Central idea: Researchers at Winona State University, Minnesota, have created a design for a rudimentary fluorescence microscope.

    Why in news?

    • The development can be put together at a cost of $30-50 (Rs 2,500-4,100) using products purchased on online marketplaces.
    • The device aims to democratize access to fluorescence microscopy.

    What is Fluorescence Microscopy?

    • An optical microscope views an object by studying how it absorbs, reflects or scatters visible light.
    • A fluorescence microscope views an object by studying how it reemits light that it has absorbed, i.e. how it fluoresces.
    • The object is illuminated with light of a specific wavelength.
    • Particles in the object absorb this light and reemit it at a higher wavelength.
    • These particles are called fluorophores; the object is infused with them before being placed under the microscope.

    How does it work?

    • The setup consists of two plexiglass surfaces, an LED flashlight, three theatre stage-lighting filters, a clip-on macro lens, and a smartphone.
    • The smartphone (with the lens attached) is placed on one surface that is suspended at a height (say, a foot above).
    • The second sheet is placed below and holds the object.
    • One of the stage-lighting filters is held between the flashlight and the object and the other two were held between the object and the smartphone.
    • The sources of illumination were also LED flashlights emitting light of correspondingly different wavelengths.

    Key observations

    • With this setup, the researchers were able to image the creatures’ brain, spinal cord, heart, and head and jaw bones.
    • They were able to zoom in and out using the smartphone camera and the clip-on lens.

    How accessible is this?

    • Using a ‘glowscope’ still requires access to fluorophores, suitable biological samples, the know-how to combine the two, and some knowledge of physics to work out which LED flashlight to buy.
    • The Foldscope was truly remarkable because all its required components were simple to understand.
    • However, the fact that a simple fluorescent microscope can be set up with a few thousand rupees means researchers can prepare samples and take them to schools, where students can observe them.

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  • How to manage UPSC prep along with a full time job?| Ex-Officer, MHA & Senior IAS mentor Avadhoot sir

    How to manage UPSC prep along with a full time job?| Ex-Officer, MHA & Senior IAS mentor Avadhoot sir


    Preparing for the UPSC exam can be a tough race against time. And if you are a working professional who is managing your job along with the preparation, coping with the syllabus can be extremely difficult.

    Your day starts with the pressure of your work. You may have to manage project deadlines, you have to attend office meetings, you may have to deal with clients at work, and spend a lot of time at your workplace.  In fact, by the time you reach home from work, you already feel exhausted and have no energy to study anymore.

    But does that mean you give up on your dreams?

    NO!

    Time management is a #UPSCskill that tops all other skills in this long journey. Moreover, the complexity and vastness of the syllabus, unpredictability and ever-changing pattern of the UPSC exam, and cut-throat competition necessitate you to invest your time wisely.

    But how to do that? If you are not a fan of wasting your time and reinventing wheel join our FREE UPSC Webinar especially for Working UPSC Professionals.

    Avadhoot Shinde, sir senior IAS mentor at CivilsDaily will be LIVE for a special session. He was a senior-level Executive officer working for the Ministry of Home Affairs and has more than 10 yrs of UPSC experience.

    What you will learn in this webinar?

    1. Management of Priorities – UPSC- work, family and life as well.
    2. Reducing time on non-priorities.
    3. Planning ahead, making targets, staying consistent w.r.t targets.
    4. How should the syllabus be approached to complete it within the time limit?
    5. Balancing prelims-mains on one hand and GS-current affairs on the other.
    6. How to determine the primary focus areas of the Prelims, Mains, and Personality tests?
    7. How to apply bookish as well as classroom knowledge to the exam?’

    We will discuss the important ways in which you can crack this exam through the following methods:

    1. Personalized timetable
    2. Personalized study plan
    3. Tracking your progress
    4. Investing in topics with good ROI
    5. Focusing on smart study

    What The Hindu mentioned about Civilsdaily Mentorship

  • 5 phased time management for UPSC 2024 (March’23 to May’24) | LIVE Workshop + QnA session with Prabhat sir, AIR 377, IRPS | Get FREE Strategic package on registration

    5 phased time management for UPSC 2024 (March’23 to May’24) | LIVE Workshop + QnA session with Prabhat sir, AIR 377, IRPS | Get FREE Strategic package on registration

    12th March 2023 (Sunday), 7:30 P.M | 15 Months to UPSC 2024 divided into 5 phases for a holistic UPSC preparation.

    Most of the UPSC-CSE toppers like Satyam Gandhi (AIR 10), Ria Dabi (AIR 15), Yash Jaluka (AIR 4), Mamta Yadav (AIR 5) and Shashwat Tripurari (AIR 19) cleared the exam as fresh graduates in their very first attempt. How were they able to do it?

    If you watch their strategy videos, you can find a common pattern — they started 12-24 months in advance before the exam.

    One of the benefits of starting your preparation early is the time you would get to revise, practice test series, make improvements, enhance the quality of your knowledge and answers, and get four steps ahead of the competition.

    However, what’s the best way to prepare, if you aren’t a fan of making mistakes and figuring it out along the way? We understand how annoying it might be for you if you were to study in a certain way for months together and then realize that it doesn’t align with the UPSC-CSE way of doing things.

    An ideal prep is divided into five phases and spread across 14-15 months? Prabhat sir, an IRPS officer who secured AIR 377 in UPSC 2019, is conducting a special workshop on time management & strategy for UPSC 2024.

    Block this time:

    12th March 2023 (Sunday), 7:30 P.M

    What you should expect in 1-1 LIVE with Prabhat sir?

    The workshop will cover a five-phased time management strategy that will help you plan and utilize your time effectively in the next 15 months leading up to UPSC 2024. Prabhat will share his own experience of preparing for the exam while managing his job and personal life. He will also provide practical tips on how to prioritize your studies, make the most of your free time, and avoid burnout.

    1. The first phase – Studying the Core Subjects. How to read every topic in the syllabus from 2-3 sources in the first reading and prepare a 1-2 page notes? And in your second reading, stick to only one source while using your notes as reference.

    2. The second phase – Studying Mains Specific Subjects & Optional. How to follow the ritual of reading, writing summaries and answering topic-wise previous year questions?

    3. Discussing 2-3 Revision Strategies which you can follow. Why should you not go more than 20 days without revision?

    4. Live demonstration of making the perfect notes. How to not copy line-by-line of everything you read & only note down the 5 dimensions of a topic?

    5. Why is the third phase of preparation the shortest of all? What should you ideally do after completing the Prelims and Mains subjects?

    6. About the fourth phase. How to improve your accuracy 3 months before the Prelims exams?

    5. The last phase. What must be done 3 months before the Mains exams?

    6. Including statistics and relevant data. What are the subject-wise important committee reports you should read?

    7. Three readings per subject. How do you study during each revision phase?


    CivilsDaily’s FREE Webinar package

    Post-webinar we will share important PDFs, timetable framework, and notes.

    Other than this a strategy package will be emailed to you.


    What The Hindu opined about Civilsdaily Mentorship

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    Register FREE for a 1-1 LIVE UPSC Masterclass by IRPS, Prabhat sir

  • G20: SUMups To Tackle Global Natural Disasters

    Central Idea

    • The concept of SUMups, a hypothetical bundling of complementary start-ups globally that work on some aspect of managing natural disasters. There are some of the innovative technologies developed by these start-ups and how they can be combined to develop more effective disaster management solutions.

    Background: The Rising Frequency and Impact of Natural Disasters Globally

    • Increasing Frequency and Severity of Natural Disasters: Globally, natural disasters have become increasingly common and the severity of their impact is worsening.
    • FAO Report: According to the FAO’s report, there were 360 natural disasters per year in the 2010s that resulted in at least 10 deaths, affected 100 or more people, led to homelessness or injury, and required a declaration of a state of countrywide emergency and an appeal for international assistance.
    • Comparison of Natural Disasters: This number is significantly higher than the 100 events recorded in the 1980s and the 90 events recorded in the 1970s.
    • Frequency of Climate, Weather, and Hydrology-related Disasters: Furthermore, climate, weather, and hydrology-related disasters are becoming more frequent, while geophysical and biological emergencies are not, with the exception of Covid-19.
    • Global Impact of Natural Disasters: The impact of these natural disasters is global, affecting countries across the world in various ways, including forest fires, heat and dust storms, and floods.
    • The Need to Improve Disaster Response and Mitigation Efforts: As a society, it is important to recognize that natural disasters will continue to pose a threat and we need to improve our ability to respond and mitigate their effects.
    • Measures Being Taken to Address the Issue of Natural Disasters: Fortunately, there are measures being taken to address this issue, including research into improving disaster response systems and the development of new technologies to aid in disaster preparedness and relief efforts.

    Disaster Prevention Technologies

    • The disaster prevention technologies developed by start-up
    • CERD-AR: CERD-AR developed an Augmented Reality (AR) application that gamifies the animations of disasters and provides disaster prevention drills to prepare people for evacuation and reaction in ultra-realistic settings.
    • A Palo Alto-based start-up One Concern: One Concern built a digital twin of the world by analyzing satellite images to predict natural disasters. The platform combines Artificial Intelligence, Machine Learning (AI/ML), and supercomputers to develop seismic and flood technology for real-time prediction of flooding and assess the risk associated with various events.

    Emergency Response and Reconstruction Technologies

    • Garuda Aerospace: Garuda Aerospace deployed drones in Turkey for surveillance in the affected earthquake areas to identify trapped victims.
    • HW Design Labs: HW Design Labs developed IoT innovations that support disaster response teams in planning their operations effectively through deep penetrating ground sensing radars, wireless connectivity solutions, advanced tracking, and navigation services.

    Emergency Communication Technologies

    • MyResQR: This start-up provides emergency communication between victims and stakeholders. The smart QR code manages information and triggers SOS during emergencies by enabling first responders like ambulance services, hospital staff, and other emergency response teams.

    Way Ahead

    • The SUMups represent an opportunity to combine innovative disaster management technologies from start-ups globally to address the Sustainable Development Goals for the whole world, such as building resilient infrastructure and zero hunger.

    Conclusion

    • The Startup20 Engagement Group of G20 can enable many such SUMups that can help deal with the increasing frequency, intensity, and complexity of natural disasters in the future. Sharing ideas and collaborating globally can help us all become better prepared and equipped to tackle these events. The article emphasizes that the sharing of ideas can be a powerful tool for solving complex problems, and the development of SUMups is a step in the right direction for improving disaster management worldwide.

    Mains Question

    Q. What is the concept of SUMups? Discuss the innovative technologies developed by start-ups in the areas of disaster prevention.


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  • India -Sweden: Flourishing Partnership

    Central Idea

    • This year marks 75 years of bilateral relations between India and Sweden, and it is an occasion to celebrate. Bilateral trade has reached unprecedented levels in the past year, with Swedish companies making significant strides in the Indian market. The latest Indian administration has shown a keen interest in augmenting and broadening the partnership between the two countries.

    The Past and Present: Bilateral Relations between India and Sweden

    • Sweden and India have come a long way in the past 100 years.
    • From limited contacts to a flourishing partnership, both countries have developed national wealth through industry and manufacturing. Swedish companies have been key drivers in both domains, and through their work, Sweden and India have found friends in one another.
    • In 2023, Sweden is celebrating the anniversaries of Ericsson, SKF, Alfa Laval, and Volvo, notable Swedish companies in India.

    Celebrating 75 Years of Friendship

    • Record bilateral trade: India and Sweden celebrated a record year for bilateral trade in 2022, with Swedish companies experiencing strong growth in India.
    • Flourishing partnership: Both countries are committed to expanding their partnership and collaborating in innovation, green transition, energy, health, industry policy and more.

    Emphasizing the Importance of Industry and Manufacturing

    • Key sectors: Industry and manufacturing are key to building long-term economic growth, and Sweden and India have identified these sectors as key areas of collaboration.
    • Swedish companies have been key drivers: An active industry policy necessitates partnerships and taking bold steps, and Swedish companies have been key drivers in industry and manufacturing in India for several decades.

    Prioritizing Green and Sustainable Practices

    • Commitment to green supply chain: The future belongs to green and sustainable practices, and both Sweden and India are committed to socially and environmentally sustainable practices throughout the entire supply chain.
    • Green transition and digitalisation: There is a clear commitment to this vision from governments and businesses alike, with a focus on digitalisation, the green transition, and the industry of the future.

    Way ahead: Opportunities for Even Closer Ties

    • There are opportunities for even closer ties between India and Sweden, including a Free Trade Agreement between the EU and India.
    • The European Union presidency offers a chance to explore this possibility, which would have a positive impact on economic and industrial exchange, particularly in cities like Pune where Swedish companies have a strong presence.

    Conclusion

    • The partnership between India and Sweden has come a long way in the past 75 years. Both nations have identified industry and manufacturing as key to building long-term economic growth, and there is a need to deepen work towards socially and environmentally sustainable practices.

    Mains Question

    Q. Discuss the key areas of collaboration between India and Sweden in the context of their 75-year bilateral relationship?


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  • [Burning Issue] Supreme Court’s Judgment on Appointment to ECI

    supreme

    Context

    • Recently, The Supreme Court of India in a judgment gave directions to reform the process of appointment of Election Commissioners in the Election commission of India.
    • In this context, this edition of the burning issue will elaborate on this judgment and talk about the various facets of this judgment.

    Background of the case

    • In 2015, a public interest litigation was filed by Anoop Baranwal challenging the constitutional validity of the practice of the Centre appointing members of the Election Commission.
    • In October 2018, a two-judge bench of the SC referred the case to a larger bench since it would require a close examination of Article 324 of the Constitution, which deals with the mandate of the Chief Election Commissioner.
    • In September last year, a five-judge Constitution bench headed by Justice KM Joseph began hearing the case and almost a month later, the verdict was reserved.

    About the Election Commission of India

    • During the initial days: At first, there was only a Chief Election Commissioner on the commission. There are currently two Election Commissioners in addition to the Chief Election Commissioner. In 1989, two additional Commissioners were appointed for the first time; however, their terms were extremely limited, lasting only until January 1, 1990.
    • Multi-member body: Two additional Election Commissioners were appointed later, on October 1, 1993. Since then, the idea of a Commission with multiple members and the authority to make decisions by majority vote has been in place.
    • Appointment: The Chief Election Commissioner and the Election Commissioners are both appointed by the President. Their tenure is six years, or until they turn 65, whichever comes first.
    • Status as Indian Supreme Court Judges: They have the same status as Indian Supreme Court Judges and receive the same benefits and salary. Parliament must impeach the Chief Election Commissioner in order to remove him or her from office.

    What is the final judgment?

    • In the case of Anoop Baranwal v. Union of India, a five-judge bench of the Supreme Court unanimously held that appointments to the constitutional posts of Chief Election Commissioner and Election Commissioners are to be made by the President of India, on the basis of the advice of a three-member committee, comprising the Prime Minister, the Leader of the Opposition in the Lok Sabha, i.e. the lower house of the Parliament (or Leader of the largest party in Opposition in the lower house, in absence of a Leader of Opposition), and the Chief Justice of India (CJI).

    What is the current process of appointment?

    • As per the current process, the Law Minister suggests a pool of suitable candidates to the Prime Minister for consideration. The President makes the appointment on the advice of the PM.

    Significance of this judgment

    • Reducing the executive control: The judgment reaffirms and reiterates the importance of divesting the control of the executive over a body that is crucial to the conduct of free and fair elections.
    • Strengthening the independence of ECI: The judgment is being seen as a step forward in the direction of strengthening the independent authority and functioning of the Election Commission which alone is mandated to conduct a free and fair election under Article 324 of the Constitution”.
    • Protecting CEC and other ECs: It will automatically protect the Election Commissioners and the CEC from removal midway through their term and is therefore vital in protecting the Election Commission’s independence.

    Why court found it relevant to intervene?

    • According to Article 324(2), The Election Commission shall consist of the Chief Election Commissioner and such number of other Election Commissioners, if any, as the President may from time to time fix and the appointment of the Chief Election Commissioner and other Election Commissioners shall, subject to the provisions of any law made in that behalf by Parliament, be made by the President. The crux of the challenge is that since there is no law made by Parliament on this issue, the Court must step in to fill the “constitutional vacuum.”
    • Article 324(5) further authorizes the President to determine the conditions of service and tenure of the Election Commissioners, again, subject to any law made by the Parliament. Notably, a law has been framed by the Parliament with respect to Article 324(5)- the Election Commission (Conditions of Service of Election Commissioners and Transaction of Business) Act, 1991, however, no such law has been promulgated under Article 324(2)- concerning appointments to the Election Commission of India (ECI)- despite the constitutional expectation.
    • Debates of the Constituent Assembly: The Court’s verdict is based on a reading of the debates of the Constituent Assembly to ascertain what the founding members of the Constitution envisaged the process to be and an interpretation of similar provisions in the Constitution.
    • Law made on this behalf by Parliament: The deliberate addition of the words “subject to the provisions of any law made on that behalf by Parliament” after prolonged discussions indicates that “what the Founding Fathers clearly contemplated and intended was, that Parliament would step in and provide norms, which would govern the appointment to such an important post as the post of Chief Election Commissioner and the Election Commissioners.”
    • Examples of other commissions: The ruling examined a number of provisions in the Constitution, including the ones relating to the powers of the Supreme Court and High Court; establishing the SC, ST and Backward Classes Commissions, etc. where the Constitution uses the phrase “subject to the provisions of any law made by Parliament”. The Court finds that while legislation has been supplemented for those provisions, there is no law on the appointment of the CEC even 70 years after independence.

    Criticism of the judgment

    • Former Union law secretary P K Malhotra, who had also headed the Legislative Department in the law ministry, said that through the verdict, the top court is legislating in the domain of Parliament.
    • However, the mode of appointment directed by the SC does not find any place in the Indian Constitution and can be challenged by the executive as judicial activism or judicial overreach.

    Government response

    • The government argued that “in the absence of such a law, the President has the constitutional power.” The government has essentially asked the court to exhibit judicial restraint.
    • The three-member committee has not had the best track record with regard to the appointment of the CBI Director. Whether this new appointment procedure will be able to bolster trust and confidence among different stakeholders, on the Election Commission and its impartiality, needs to be seen.

    Supreme court’s argument

    • The court in its ruling discusses at length its intention to “maintain a delicate balance” on the separation of powers. The court cannot usurp what is purely a legislative power or function but where there exist veritable gaps or a vacuum legislative field, the Court may not shy away from what essentially would be part of its judicial function.
    • The ruling cites past instances of the Court stepping in to fill a gap in the law, including the Vishaka guidelines to curb sexual harassment in the workplace, and the interpretation of the process of appointment of judges.

    One more issue highlighted by SC

    • As per Section 4 of the Chief Election Commissioner and Other Election Commissioners (Conditions of Service) Act, 1991, the Chief Election Commissioner is entitled to a term of 6 years, but they have to vacate the office upon attaining the age of 65 years.
    • The SC Bench had enquired during the proceedings that to fulfill the mandate of the provision, the Government could have considered an officer who could have completed the full term of six years.
    • But none of the Election commissioners have been able to complete the 6-year tenure. The Supreme Court observed that the appointment of an Election Commissioner with a tenure of fewer than six years is a clear breach of law pursuant to the provisions of the Act of 1991.

    Conclusion

    • Article 324(2) vested the Parliament with the job of framing a law to determine the appointment procedure, and to that effect, SCI’s directions are temporary in nature, until the legislative vacuum is filled.
    • However, the judgment will have a precedential value in that any law passed under Article 324(2) will be tested on the touchstone of whether it adequately protects the independence of the Election Commission from the executive.
    • As far as the effectiveness of this scheme of appointment is concerned, the track record of this three-member committee has not been impressive, and it remains to be seen whether the state of the ECI remains the same, improves, or worsens.

    “An Election Commission which does not ensure free and fair poll as per the rules of the game, guarantees the breakdown of the foundation of the rule of law.”

  • Government amends KYC to add non-profit organisations, ‘politically exposed persons’

    political

    Central idea: The Finance Ministry has amended the Prevention of Money Laundering (Maintenance of Records) Rules for widening the scope of Know your Customer (KYC) norms to include Politically Exposed Persons (PEPs), non-profit organisations (NPOs) and those dealing in virtual digital assets (VDA) as reporting entities.

    Who are Politically Exposed Persons (PEP)?

    • According to the modified PML Rules, the Finance Ministry has defined PEPs as-
    1. Individuals who have been entrusted with prominent public functions by a foreign country
    2. Includes heads of states or governments, senior politicians, senior government or judicial or military officers, senior executives of state-owned corporations, and important political party officials.
    • Banks and financial institutions must maintain records of financial transactions of PEPs and share them with the Enforcement Directorate as and when sought.

    Other key changes introduced

    Recording of financial transactions of NPOs/NGOs

    • The financial institutions must register the details of their NGO clients on the Darpan portal of the Niti Aayog.
    • They are required to maintain the record for five years after the business relationship between a client and a reporting entity has ended or the account has been closed, whichever is later.

    Tightening of the definition of beneficial owners

    • The amendment to the PMLA rules includes the tightening of the definition of beneficial owners under the anti-money laundering law.
    • As per the amendments, any individual or group holding 10 per cent ownership in the client of a ‘reporting entity’ will now be considered a beneficial owner against the ownership threshold of 25 per cent applicable earlier.
    • The reporting entities include banks and financial institutions, firms engaged in real estate and jewellery sectors, intermediaries in casinos and crypto or virtual digital assets.

    Collection of information from clients

    • Reporting entities such as banks and crypto platforms are mandated to collect information from their clients under the anti-money laundering law.
    • So far, these entities were required to maintain KYC details or records of documents evidencing the identity of their clients, as well as account files and business correspondence relating to clients.
    • They will now have to also collect the details of the registered office address and principal place of business of their clients.
    • Additionally, they are required to maintain a record of all transactions, including the record of all cash transactions of more than Rs 10 lakh.

    Why such move?

    • FATF assessment: The amendments assume significance ahead of India’s proposed FATF assessment, which is expected to be undertaken later this year.
    • Risk-management: In one of its 40 recommendations, FATF recommends that financial institutions have risk-management systems to identify domestic and international PEPs.
    • Remove ambiguities: The broader objective is to bring in legal uniformity and remove ambiguities before the FATF assessment.

     

     

  • ISRO releases Landslide Atlas of India

    landslide

    The Indian Space Research Organisation (ISRO) recently released the Landslide Atlas of India to identify landslide hotspots in the country.

    What are Landslides?

    • Landslides are natural disasters that occur in mountainous terrains where soil, rock, geology, and slope conditions are conducive.
    • A landslide is the sudden movement of rock, boulders, earth, or debris down a slope.
    • They can be triggered by natural causes such as heavy rainfall, earthquakes, snowmelting, and undercutting of slopes due to flooding.
    • They are extremely hazardous, posing a threat to human and animal lives, damaging property, roads, and bridges, disrupting communication lines, and snapping power lines.
    • Landslides are broadly classified based on the type of materials involved, the type of movement of the material, and the type of flow of the material.

    Why do they occur?

    • Landslides are natural disasters that occur mainly in mountainous terrains due to conducive conditions of soil, rock, geology, and slope.
    • Heavy rainfall, earthquakes, snow-melting, and undercutting of slopes due to flooding can trigger landslides.
    • Anthropogenic activities such as excavation, cutting of hills and trees, excessive infrastructure development, and overgrazing by cattle can also cause landslides.

    Factors contributing

    • The main factors that influence landslides include lithology, geological structures like faults, hill slopes, drainage, geomorphology, land use and land cover, soil texture and depth, and weathering of rocks.
    • Rainfall variability pattern is the single biggest cause for landslides in India, with the Himalayas and the Western Ghats remaining highly vulnerable.

    India’s vulnerability to landslides

    • India is considered among the top five landslide-prone countries globally, where at least one death per 100 sq. km is reported in a year due to a landslide event.
    • Approximately 12.6% of the country’s geographical land area (0.42 million sq km) is prone to landslides, with 66.5% of landslides reported from the North-western Himalayas, 18.8% from the North-eastern Himalayas, and 14.7% from the Western Ghats.

    Risks in specific states          

    • Mizoram recorded the highest number of landslide events in the past 25 years, with 12,385 events, of which 8,926 were recorded in 2017 alone.
    • Nagaland and Manipur also reported a high number of landslide events during the 2017 monsoon season.
    • Uttarakhand and Kerala reported the highest number of landslides, with Uttarakhand experiencing 11,219 events since 1998, and Kerala making inhabitants significantly vulnerable to fatalities, despite fewer events.

    Classification and Mapping of Landslides

    • Landslides are broadly classified based on the type of materials involved, type of movement, type of flow of the material, and whether they spread laterally.
    • The Landslide Atlas of India maps landslides mainly based on events and seasons.
    • The National Remote Sensing Centre (NRSC) used a landslide database created from 1998 to 2022 using aerial and high-resolution satellite images.

     

  • In news: Megha Tropiques Satellite

    sat

    ISRO attempted a controlled re-entry of the Megha Tropiques-1 satellite with leftover fuel to lower the orbit and reduce space debris.

    Megha Tropiques Satellite

    • The weather satellite Megha Tropiques-1 was developed as a joint mission by Indian and French space agencies.
    • It was launched aboard a PSLV by the space agency in 2011.
    • And, although the planned mission life of the satellite was only three years, it continued providing data on water cycle and energy exchanges in the tropics for nearly a decade.

    How was the satellite brought down?

    • With over 120kgs of fuel remaining in the satellite even after being decommissioned.
    • ISRO determined that there was enough to attempt a controlled re-entry.
    • When the satellites re-enter the atmosphere, the friction causes it to heat up to extreme high temperatures of thousands of degrees Celsius.
    • Without a heat shield, 99% of a satellite gets burnt up whether in a controlled re-entry or an uncontrolled one.

    Significance of the move

    • This was the first time that ISRO attempted such a manoeuvre to clear out space debris despite the satellite not being built to do so.
    • Usually, satellites are left in their orbit and because of the gravitational pull of the earth, they come down to the atmosphere over years and years.

    Why did ISRO attempt a controlled re-entry?

    • ISRO attempted the control re-entry to demonstrate and understand the process of doing so.
    • Keeping space clean is crucial with multiple spacefaring nations and private entities launching satellites.
    • Thousands of objects are flying around in low earth orbits, including old satellites, parts, and rocket stages.
    • Even small debris can destroy active satellites due to high speeds.
    • Kessler syndrome is a scary scenario where space debris collisions create more debris.

    What happens to satellites usually?

    • A controlled re-entry like the one attempted by Isro earlier this week is possible only for satellites in the low-earth orbit – at about 1,000 kms over the surface of the earth.
    • These manoeuvres, however, are not usually attempted because fuel reserves have to be maintained in the satellite after mission life is over.
    • And, this is impossible for satellites placed in geo-stationary or geosynchronous orbit – where time taken by the satellite to orbit the earth matches Earth’s rotation.
    • Such satellites are at altitudes of nearly 36,000 kms.
    • For attempting to bring down a satellite from such as orbit, a huge fuel reserve would be needed. This will only make the satellite heavier and costlier at launch.

    Also read-

    [Sansad TV] Perspective: Cluttered Space


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