Note4Students
From UPSC perspective, the following things are important :
Prelims level: Artificial Neural Networks (ANN)
Mains level: Artificial Intelligence
This newscard is an excerpt from the original article published in TH.
What are ANN?
- The concept behind an ANN is to define inputs and outputs, feed pieces of inputs to computer programs that function like neurons and make inferences or calculations.
- It then forwards those results to another layer of computer programs and so on, until a result is obtained.
- As part of this neural network, a difference between intended output and input is computed at each layer and this difference is used to tune the parameters to each program.
- This method is called back-propagation and is an essential component to the Neural Network.
Setting up of ANNs
- Instead of CPUs, Graphic Processing Units (GPU) which are good at performing massive parallel tasks can be used for setting up ANNs.
- A few free ANN frameworks are TensorFlow, Keras, PyTorch and Theano.
- These can be used for both normal Machine Learning tasks like classification or clustering and for Deep Learning/ANN tasks.
Why called Neural Network?
- Neuron is the building block of the brain and it inspired computer scientists from the 1950s to make a computer perform tasks like a brain does.
- It is not a simple problem and the clue to its complexity is in the brain structure.
Why ANN?
Ans. Making an artificial brain
- We need billions of artificial neurons if we were to build an artificial brain.
- With the increase in computing power, mimicking billions of neurons is now possible.
Popularity of ANNs
- Data Science, used interchangeably with Machine Learning, is the computer technology that uses data to detect patterns.
- Hand-written digit recognition is a good example of machine learning.
- However, in order for the computer to do this task, large amounts of sample data need to be manually labelled as examples of images of digits.
- The ANN mentioned above with its backpropagation does exactly this.
- This is why ANNs have become hugely popular in the past decade. This approach of using neural networks of many layers to automatically detect patterns and parameters is called Deep Learning.
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From UPSC perspective, the following things are important :
Prelims level: Havana Syndrome
Mains level: NA
A recent US intelligence report says that ‘Havana Syndrome’ —a collection of symptoms and related brain injuries, reported by some US officials could be caused by pulsed electromagnetic energy or close-range ultrasound.
What is Havana Syndrome?
- ‘Havana Syndrome’ is a colloquial name given to a set of symptoms such as dizziness, hearing loss, headaches, vertigo, nausea, memory loss and possible brain injuries.
- It was first reported by 16 American Embassy staff and their family members in Havana, Cuba, in 2016-17.
- There have been other instances of the phenomenon, which has mostly impacted US officials.
What did the latest investigation find?
- Such cases have been caused by pulsed electromagnetic energy in the radio frequency.
- The results of the investigation did not point to who may have been behind the phenomenon, nor commented on their motivations.
- A partially redacted report summary finds that the symptoms of AHI are “genuine and compelling.”
What can be the other reasons?
- Psychosocial factors alone do not explain the core characteristics, the report finds, although they may cause other incidents or contribute to long-term effects.
- These other incidents could occur via hyper-vigilance or reactions to stress especially among individuals who are security-oriented.
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From UPSC perspective, the following things are important :
Prelims level: Vande Bharat Express
Mains level: Highs speed railways in India
Presenting the Union Budget for 2022-23, Finance Minister said 400 new energy-efficient Vande Bharat trains will be introduced in three years.
What is Vande Bharat Express?
- The Vande Bharat Express is a semi-high speed train designed, developed, and built by the Integral Coach Factory (ICF).
- Presently there are only two Vande Bharat trains that are running — Delhi to Varanasi and Delhi to Katra.
Key Features
- The current Vande Bharat trains have seating only in two classes — chair car and executive chair car. But Railways is planning to upgrade it.
- The trains have fully sealed gangways for a dust-free environment, modular bio-vacuum toilets, rotating seats in Executive Class, personalized reading lights, automatic entry/exit doors with sliding footsteps, diffused LED lighting, mini pantry, and sensor-based interconnecting doors in each coach.
- They are self-propelled trains that do not require an engine. This feature is called a distributed traction power system, which is increasingly becoming the norm the world over for passenger operations(Distributed power gives the train higher acceleration and deceleration compared to loco-hauled trains, which take a much longer time to reach top speed or to gradually come to a halt).
- 400 trains announced by the Finance Minister carry a potential investment of Rs 50,000 crore over the next three years, because of different specifications and also, inflation.
- The current Vande Bharat’s are being made at Rs 106 crore per trainset of 16 cars, at 2018 pricing.
Benefits of Vande Bharat Trains
1) Cuts Travel Time Drastically
2) Energy Efficient
3) Reduce Turnaround Time
4) Faster Acceleration and Deceleration among others.
Why High-speed rail projects are important for India?
- Improve India’s GDP: According to a study conducted by the London School of Economics and Political Science and the University of Hamburg in 2008, cities that are connected to HSR systems tend to witness a rise in their gross domestic product (GDP) by at least 2.7 percentage points compared to their neighbors that do not have an HSR station. The reason for the differential was improved market access.
- Role of the trains in India’s development: Being the third-largest network in the world under single management and
with over 68,102 route km IR strives to provide a safe, efficient, competitive, and world-class transport system.
- During FY21, IR carried 1.23 billion tonnes of
freight and 1.25 billion passengers. In addition, despite COVID -19 pandemic revenue earning freight loading (excluding loading by Konkan Railway Corporation Ltd. (KRCL) was 1230.9 million tonnes in 2020-21 as compared to 1208.4 million tonnes during2019-20. Passengers originating were 1250 million in 2020-21 as compared to 8086 million in 2019-20- Economic Survey 2021-22.
- Spin-off effect: It is about Rs 40,000 crore business opportunity that would also create 15,000 jobs and several spin-off benefits and act as a stimulus for the development of satellite towns.
- Boost to ‘Make in India’– it involves only about 15 percent import content which will further go down if production volumes increase.
- Environmental Benefits: More rail traffic translates to less automobile traffic, and by extension, less highway and city street traffic congestion, reduced air pollution. In addition, less congestion means less wear and tear on the roadways, which means that they require fewer repairs. According to the International Association of Railways (UIC), high-speed rail is eight times more energy-efficient than airplanes and four times more efficient than automobile use.
- Social Benefits: High-speed rail can promote a sense of social cohesion among residents, by bringing distant populated areas closer together.
- Global Experience: The High-Speed Railway has an economic multiplier effect. Since the introduction of the first Shinkansen (literally meaning ‘new main line’) in Japan in 1964, high-speed trains have proven to be an undeniable technological, commercial and popular success. Many countries like the UK, France, Germany, Spain, China, and most recently, the US have adopted the technology.
Challenges faced by the High-Speed Rail Projects
- Infrastructure Bottlenecks: India’s railway system is saddled with a two-pronged infrastructure deficit – aging infrastructure and the pace of new project execution struck by unforeseen circumstances related to socio-economic issues on land acquisition for new projects and escalating projects costs.
- New Technologies: For instance, Hyperloop Transportation Technologies which proposes to make travel as fast as 760 miles per hour, investing a humongous capital on bullet trains seems like an outdated investment.
- Political Will: The politics of Rail Bhavan and an unwillingness to accept the need for change have derailed the project execution.
- Short of Investments: For instance, the estimated cost of Mumbai-Ahmedabad HSR is ₹1.1 lakh crore (US$17 billion) which is massively expensive. Though India receives funding from Japan (81%), the power demand and up-gradation of existing infrastructure will be more costly.
- Social Conflict: Development along the corridor will lead to an increase in urbanization, the fight for resources, and social conflicts due to the labor influx of the workforce.
- Legal Trouble: While farmers in Maharashtra are protesting on the ground, the farmers in Gujarat led by Gujarat Khedut Samaj (GKS)- fighting a case in the Gujarat High Court against the land acquisition for the bullet train project.
Way ahead
- Stakeholders approach: Politics and Policy have to be in sync for the railway modernization. In order to achieve the target, Railways will have to pool in all resources and multiple stakeholders, including private players to deliver the propulsion system and also carry out the assembling. The Policymakers and administration should give priority to systematic sustainable development work- the convergence of jal, jungle, jameen(water-forest-land is an asset for the Adivasi community).
- Regular Monitoring: To ensure the induction of these trains in the shortest time possible, as envisaged by Indian Railways.
- Technology Transfer: The government has to push for the technology transfer of HSR. This is because there is no mention of the transfer of technology anywhere in the agreement.
Conclusion
India aspires to become the third-largest economy in the next 25 years. It has already proven its prowess in the field of space and now is the time for furthering its international stature by joining the exclusive club of nations having a high-speed rail network, however, we should be careful not to confuse leapfrogging technology development with elitism, whether it is mobile phones, satellite launches, regional air connectivity, or high-speed rail. This high-speed rail project will therefore help the Indian Railways to become a global leader in scale, technology, and skill.
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From UPSC perspective, the following things are important :
Prelims level: Categories of security
Mains level: Need for security to politicians
A noted Parliamentarian from Hyderabad has rejected the ‘Z’ category security by the Central Armed Police Forces (CAPF) accorded to him.
Security Provisions in India
- In India, security is provided to high-risk individuals by the police and local government.
- The level of security needed by any individual is decided by the Ministry of Home Affairs, based on inputs received from intelligence agencies which include the IB and R&AW.
- Individuals such as PM, home minister, and other officials such as the National Security Advisor generally get security cover because of the positions they occupy.
- In addition to this, persons who are believed to be under threat also receive security cover.
What is ‘Z’ Category Security?
In India, the category covers are X, Y, Y-plus, Z, Z-plus, and SPG (Special Protection Group).
- X Category: The protectee gets one gunman. Protectees in the Y category have one gunman for mobile security and one (plus four on rotation) for static security.
- Y Plus category: It receives the cover of two gunmen (plus four on rotation) for mobile security, and one (plus four on rotation) for residence security,
- Z Category: It has six gunmen for mobile security and two (plus 8) for residence security. They get 10 security personnel for mobile security, and two (plus 8) for residence security.
- Z Plus Category: It is provided by National Security Guard commandos whereas the other category of security is provided by the Delhi police or the ITBP or CRPF personnel.
What about Special Protection Group (SPG) Cover?
- The SPG cover is meant only for the PM and his immediate family.
- After Indira Gandhi was assassinated by her own security guards in 1984, the Rajiv Gandhi government decided to create a special cadre of security personnel for the PM.
- In March 1985, following the recommendations of a committee set up by the Home Ministry, a special unit was created for this purpose under the Cabinet Secretariat.
- This unit, initially called the Special Protection Unit, was renamed as Special Protection Group in April 1985.
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From UPSC perspective, the following things are important :
Prelims level: Chandrayaan-3
Mains level: Not Much
ISRO plans to execute the Chandrayaan-3 mission in August this year.
What is Chandrayaan-3 Mission?
- The Chandrayaan-3 mission is a follow-up of Chandrayaan-2 of July 2019, which aimed to land a rover on the lunar South Pole.
Chandrayaan-2: A quick recap
- Chandrayaan-2 consisted of an Orbiter, Lander and Rover, all equipped with scientific instruments to study the moon.
- The Orbiter would watch the moon from a 100-km orbit, while the Lander and Rover modules were to be separated to make a soft landing on the moon’s surface.
- ISRO had named the Lander module as Vikram, after Vikram Sarabhai, the pioneer of India’s space programme, and the Rover module as Pragyaan, meaning wisdom.
Utility of the Orbiter
- The Orbiter part of the mission has been functioning normally. It is carrying eight instruments.
- Each of these instruments has produced a handsome amount of data that sheds new light on the moon and offers insights that could be used in further exploration.
Inception of Chandrayaan 3
- The subsequent failure of the Vikram lander led to the pursuit of another mission to demonstrate the landing capabilities needed for the Lunar Polar Exploration Mission proposed in partnership with Japan for 2024.
Its design
- The lander for Chandrayaan-3 will have only four throttle-able engines.
- Unlike Vikram on Chandrayaan-2 which had five 800N engines with a fifth one being centrally mounted with a fixed thrust.
- Additionally, the Chandrayaan-3 lander will be equipped with a Laser Doppler Velocimeter (LDV).
Back2Basics: Chandrayaan-1 Mission
- The Chandrayaan-1 mission was launched in October 2008 was ISRO’s first exploratory mission to the moon, in fact to any heavenly body in space.
- The mission was designed to just orbit around the moon and make observations with the help of the instruments onboard.
- The closest that Chandrayaan-1 spacecraft came to the moon was in an orbit 100 km from its surface.
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From UPSC perspective, the following things are important :
Prelims level: Definition of Forests
Mains level: Not Much
The Union Ministry of Environment, Forest & Climate Change has informed about the criteria used to define forest in India.
Defining Forests universally
- As per the Conference of Parties (CoP) 9-Kyoto Protocol, the forest can be defined by any country depending upon the capacities and capabilities of the country.
- Forest- Forest is defined structurally on the basis of
- Crown cover percentage: Tree crown cover- 10 to 30% (India 10%)
- Minimum area of stand: area between 0.05 and 1 hectare (India 1.0 hectare) and
- Minimum height of trees: Potential to reach a minimum height at maturity in situ of 2 to 5 m (India 2m)
India’s definition of Forests
The definition of forest cover has clearly been defined in all the India State of Forest Report (ISFR) and in all the International communications of India.
- The forest cover is defined as ‘all land, more than one hectare in area, with a tree canopy density of more than 10 percent irrespective of ownership and legal status.
- Such land may not necessarily be a recorded forest area. It also includes orchards, bamboo and palm’.
Classification of forest cover
In ISFR 2021 recently published has divided the forest cover as:
- Inside Recorded Forest Area: These are basically natural forests and plantations of Forest Department.
- Outside Recorded Forest Area: These cover mango orchards, coconut plantations, block plantations of agroforestry.
Back2Basics: Forest Classification in India
The Forest Survey of India (FSI) classifies forest cover in 4 classes.
- Very Dense forest: All lands with tree cover (including mangrove cover) of canopy density of 70% and above.
- Moderately dense forest: All lands with tree cover (including mangrove cover) of canopy density between 40% and 70%.
- Open forests: All lands with tree cover (including mangrove cover) of canopy density between 10% and 40%.
- Scrubs: All forest lands with poor tree growth mainly of small or stunted trees having canopy density less than 10%.
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From UPSC perspective, the following things are important :
Prelims level: Ramsar Convention, Coringa WLS
Mains level: Not Much
Godavari Estuary in Coringa Wildlife Sanctuary (CWS) is facing due ignorance despite meeting all nine criteria of Ramsar Convention.
Godavari Estuary
- The estuary, including 235.70 sq. km Coringa Wildlife Sanctuary (CWS), is one of the rarest eco-regions on the earth.
- It is also home to India’s second-largest mangrove cover after the Sundarbans.
- The CWS is inhabited by 115 endangered fishing cats (Prionailurus viverrinus), Olive Ridley turtles, Indian smooth-coated otter, and saltwater crocodiles.
What are the nine criteria laid out by Ramsar Convention?
- Criterion 1: “it contains a representative, rare, or unique example of a natural or near-natural wetland type found within the appropriate biogeographic region.”
- Criterion 2: “it supports vulnerable, endangered, or critically endangered species or threatened ecological communities.”
- Criterion 3: “it supports populations of plant and/or animal species important for maintaining the biological diversity of a particular biogeographic region.”
- Criterion 4: “it supports plant and/or animal species at a critical stage in their life cycles, or provides refuge during adverse conditions.”
- Criterion 5: “it regularly supports 20,000 or more waterbirds.”
- Criterion 6: “it regularly supports 1% of the individuals in a population of one species or subspecies of waterbird.”
- Criterion 7: “it supports a significant proportion of indigenous fish subspecies, species or families, life-history stages, species interactions and/or populations that are representative of wetland benefits and/or values and thereby contributes to global biological diversity.”
- Criterion 8: “it is an important source of food for fishes, spawning ground, nursery and/or migration path on which fish stocks, either within the wetland or elsewhere, depend.”
- Criterion 9: “it regularly supports 1% of the individuals in a population of one species or subspecies of wetland-dependent non-avian animal species.”
Back2Basics: Ramsar Convention
- The Convention on Wetlands of International Importance (better known as the Ramsar Convention) is an international agreement promoting the conservation and wise use of wetlands.
- It is the only global treaty to focus on a single ecosystem.
- The convention was adopted in the Iranian city of Ramsar in 1971 and came into force in 1975.
- Traditionally viewed as a wasteland or breeding ground of disease, wetlands actually provide fresh water and food and serve as nature’s shock absorber.
- Wetlands, critical for biodiversity, are disappearing rapidly, with recent estimates showing that 64% or more of the world’s wetlands have vanished since 1900.
- Major changes in land use for agriculture and grazing, water diversion for dams and canals, and infrastructure development are considered to be some of the main causes of loss and degradation of wetlands.
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From UPSC perspective, the following things are important :
Prelims level: Virtual Digital Assets
Mains level: Taxing crypto assets
Recently, The Central Board of Direct Taxes (CBDT) issued detailed guidelines on the Tax Deducted at Source (TDS) rule for Virtual Digital Assets (VDAs) such as cryptocurrencies .
What are Virtual Digital Assets?
- To define the term “virtual digital asset”, a new clause (47A) is proposed to be inserted into section 2 of the Act.
- A virtual digital asset is proposed to mean any information or code or number or token (not being Indian currency or any foreign currency):
- Generated through cryptographic means or otherwise
- Providing a digital representation of value that is exchanged with or without consideration with the promise or representation of having inherent value
- Functions as a store of value or a unit of account and includes its use in any financial transaction or investment, but not limited to, investment schemes
- Can be transferred, stored, or traded electronically.
- Non-fungible token (NFT) and; any other token of similar nature are included in the definition.
Why tax them?
- Popularity: Virtual digital assets have gained tremendous popularity in recent times and the volumes of trading in such digital assets have increased substantially.
- Growing market: Further, a market is emerging where payment for the transfer of a virtual digital asset can be made through another such asset.
- Increased transactions: There has been a phenomenal rise in such transactions and the magnitude and frequency of these transactions have made it imperative to provide for a specific tax regime.
- Prevalence of gifting: The gifting of virtual digital assets is also a popular mode of exchange.
Key takeaways from the FM’s speech
- The bill provides for the definition of virtual digital assets which is wide enough to cover emerging digital assets including NFT, assets in metaverse, cryptocurrencies, etc.
- This recognition of digital assets under income tax is NOT akin to granting legal status.
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From UPSC perspective, the following things are important :
Prelims level: Bomb Cyclone, Bombogenesis
Mains level: Not Much
Major cities such as New York and Boston in US are witnessing a “Bomb Cyclone” characterized by the explosive power of rapid drops in atmospheric pressure.
What is Bomb Cyclone?
- A bomb cyclone is a large, intense mid-latitude storm that has low pressure at its center, weather fronts and an array of associated weather, from blizzards to severe thunderstorms to heavy precipitation.
- It becomes a bomb when its central pressure decreases very quickly—by at least 24 millibars in 24 hours.
- When a cyclone “bombs,” or undergoes bombogenesis, this tells us that it has access to the optimal ingredients for strengthening, such as high amounts of heat, moisture and rising air.
Why is it called a bomb?
- Most cyclones don’t intensify rapidly in this way.
- Bomb cyclones put forecasters on high alert, because they can produce significant harmful impacts.
Its etymology
- The word “bombogenesis” is a combination of cyclogenesis, which describes the formation of a cyclone or storm, and bomb, which is, well, pretty self-explanatory.
- This can happen when a cold air mass collides with a warm air mass, such as air over warm ocean waters.
- The formation of this rapidly strengthening weather system is a process called bombogenesis, which creates what is known as a bomb cyclone.
How does it occur?
- Over the warmer ocean, heat and moisture are abundant.
- But as cool continental air moves overhead and creates a large difference in temperature, the lower atmosphere becomes unstable and buoyant.
- Air rises, cools and condenses, forming clouds and precipitation.
Where does it occur the most?
- The US coast is one of the regions where bombogenesis is most common.
- That’s because storms in the mid-latitudes – a temperate zone north of the tropics that includes the entire continental US – draw their energy from large temperature contrasts.
- Along the US East Coast during winter, there’s a naturally potent thermal contrast between the cool land and the warm Gulf Stream current.
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From UPSC perspective, the following things are important :
Prelims level: Thirukkural
Mains level: Ancient sangam literature
President Ram Nath Kovind quoted a couplet from Thirukkural while addressing the joint Houses of Parliament for Budget Session.
What did the President quote?
- ‘Karka Kasadara Karpavai Kattrapin Nirka Atharku Thaka’ was the couplet chosen by him to reiterate the importance of the New Education Policy.
- The couplet insists on thorough and flawless learning and adhering to what one has learnt.
What is Thirukkural?
- The Tirukkuṟaḷ (meaning ‘sacred verses’), or shortly the Kural, is a classic Tamil language text consisting of 1,330 short couplets, or kurals, of seven words each.
- The text is divided into three books with aphoristic teachings on virtue (aram), wealth (porul) and love (inbam), respectively.
- Considered one of the greatest works ever written on ethics and morality, it is known for its universality and secular nature.
Three major parts of the book
- Aram : Book of Virtue (Dharma), dealing with moral values of an individual and essentials of yoga philosophy
- Porul : Book of Polity (Artha), dealing with socio-economic values, polity, society and administration
- Inbam: Book of Love (Kama), dealing with psychological values and love
Who authored it and when?
- Its authorship is traditionally attributed to Valluvar, also known in full as Thiruvalluvar.
- The text has been dated variously from 300 BCE to 5th century CE.
- The traditional accounts describe it as the last work of the third Sangam, but linguistic analysis suggests a later date of 450 to 500 CE and that it was composed after the Sangam period.
Cultural significance of Thirukkural
- The Kural is traditionally praised with epithets and alternative titles, including “the Tamil Veda” and “the Divine Book.”
- Written on the foundations of ahimsa, it emphasizes non-violence and moral vegetarianism as virtues for an individual.
- In addition, it highlights truthfulness, self-restraint, gratitude, hospitality, kindness, goodness, duty, giving, and so forth.
- It covers a wide range of social and political topics such as king, ministers, taxes, justice, forts, war, greatness of army and soldier’s honor.
- It emphasizes death sentence for the wicked, agriculture, education, abstinence from alcohol and intoxicants.
- It also includes chapters on friendship, love, sexual unions, and domestic life.
Read these quotes and bookmark them. They can be used in essays:
- Nothing is impossible for those who act after wise counsel and careful thought.
- Real kindness seeks no return.
- The only gift is giving to the poor; All else is exchange.
- Friendship with the wise gets better with time, as a good book gets better with age.
- Worthless are those who injure others vengefully, while those who stoically endure are like stored gold.
- Among a man’s many good possessions, A good command of speech has no equal. Prosperity and ruin issue from the power of the tongue. Therefore, guard yourself against thoughtless speech.
- A fortress is of no use to cowards.
- Even the ignorant may appear very worthy, If they keep silent before the learned.
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From UPSC perspective, the following things are important :
Prelims level: Sacred Ensembles of the Hoysalas
Mains level: Temple architecture of India
The Hoysala Temples of Belur, Halebid and Somnathapura in Karnataka have been finalized as India’s nomination for consideration as World Heritage for the year 2022-2023.
Sacred Ensembles of the Hoysalas
- The sacred ensembles of the Hoysalas are extraordinary expressions of spiritual purpose and vehicles of spiritual practice and attainment.
- The sacred ensembles of the Hoysalas at Belur and Halebid are the finest, most exquisite, and most representative examples of the artistic genius and cultural accomplishments of the Hoysalas remaining today.
[I] Belur: Chennakeshava Temple Complex
- The Chennakeshava temple complex was at the center of the old walled town located on the banks of the Yagachi River.
- The complex itself was walled in a rectangular campus with four rectilinear streets around it for ritual circumambulation of the deity.
- Construction of the temple commenced in 1117 AD and took a 103 years to complete.
- The temple was devoted to Vishnu.
- The richly sculptured exterior of the temple narrate scenes from the life of Vishnu and his reincarnations and the epics, Ramayana, and Mahabharata.
- However, some of the representations of Shiva are also included.
- Consecrated on a sacred site, the temple has remained continuously worshipped since its establishment and remains until today as a site of pilgrimage for Vaishnavites.
[II] Halebid: Hoysaleshwara Temple
- At the zenith of the Hoysala empire, the capital was shifted from Belur to Halebid that was then known as Dorasamudhra.
- The Hoysaleshwara temple at Halebidu is the most exemplary architectural ensemble of the Hoysalas extant today.
- Built in 1121CE during the reign of the Hoysala King, Vishnuvardhana Hoysaleshwara.
- The temple, dedicated to Shiva, was sponsored and built by wealthy citizens and merchants of Dorasamudra.
- The temple is most well-known for the more than 240 wall sculptures that run all along the outer wall.
- Halebid has a walled complex containing of three Jaina basadi (temples) of the Hoysala period as well as a stepped well.
[III] Somnathpur: Kesava Temple
- The Keshava temple at Somanathapura is another magnificent Hoysala monument, perhaps the last.
- This is a breathtakingly beautiful Trikuta Temple dedicated to Lord Krishna in three forms – Janardhana, Keshava and Venugopala.
- Unfortunately, the main Keshava idol is missing, and the Janardhana and Venugopala idols are damaged.
- Still this temple is worth a visit just to soak in the artistry and sheer talent of the sculptors who created this magnificent monument to the Divine.
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From UPSC perspective, the following things are important :
Prelims level: PUC Certificate
Mains level: Not Much
Delhi govt will soon make PUC certificate mandatory for fuel at filling stations.
What is PUC Certificate?
- The PUC certificate is a document that any person driving a motor vehicle can be asked to produce by a police officer in uniform authorized by the state government.
- These issue certificates if a vehicle is found complying with the prescribed emission norms.
- Since the Motor Vehicles (Amendment) Act, 2019 came into force, PUC certificate has been made mandatory.
- A PUC certificate contains information such as the vehicle’s license plate number, PUC test reading, date on which the PUC test was conducted and the expiry date.
How is a pollution control check carried out?
- The computerized model for pollution check was developed by the Society of Indian Automobile manufacturers.
- A gas analyzer is connected to a computer, to which a camera and a printer are attached.
- The gas analyzer records the emission value and sends it to the computer directly, while the camera captures the license plate of the vehicle.
- Subsequently, a certificate may be issued if the emission values are within the limits.
Fines for non-compliance
- The test costs between Rs 60 and Rs 100.
- The validity of the test is one year for BS IV vehicles and three months for others.
- The fine for PUC violations has now gone up to Rs 10,000; it used to be Rs 1,000 for the first offence and Rs 2,000 for subsequent violations before the amendments came into force.
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From UPSC perspective, the following things are important :
Prelims level: NeoCoV
Mains level: Not Much
NeoCov coronavirus found in bats may pose threat to humans in the future, scientists caution.
Coronavirus: A quick backgrounder
- Coronaviruses are a large family of viruses that are known to infect animals and humans.
- They are largely categorized into four genera — alpha, beta, gamma, and delta.
- Broadly speaking, alpha and beta coronaviruses commonly infect mammals such as bats and humans, while Gamma and Delta mainly infect birds.
Infecting humans: Through ‘Zoonotic Spillover’
- While animals, including bats, are generally considered as the reservoirs of coronaviruses, rarely spillover events could occur.
- It is possible for viruses that infect animals to jump to humans, a process which is known as zoonotic spillover.
- Many major infectious diseases, including COVID-19, is widely thought to be a result of spillover.
COVID-19 Pandemic
- SARS-CoV-2, the coronavirus responsible for the COVID-19 pandemic, belongs to the genus of beta coronavirus.
- It is in fact the 7th type of coronavirus known to infect and cause severe disease in humans.
How does it affect humans?
- How a coronavirus latches onto special receptors on host cells depends on a key part of the virus known as its receptor-binding domain.
- The differences in the receptor-binding domain of coronaviruses are therefore what determine the type of host receptor the virus will use and thus the host that it will be able to infect.
- There are currently 4 well-characterized receptors for coronaviruses, including ACE2, which is used by SARS-CoV and SARS-CoV-2, and DPP4 used by MERS-CoV.
What is NeoCoV?
- NeoCoV is a bat coronavirus that was first identified in 2011.
- It was identified in a species of bats known as Neoromicia, which is where the name NeoCoV was derived from.
- Commonly known as aloe bats, this species is distributed in the Afro-Malagasy region.
- NeoCoV shares an 85% similarity to MERS-CoV in the genome sequence, making it the closest known relative of MERS-CoV.
Does NeoCoV infect humans and cause high mortality?
- It is important to note that inherently, NeoCoV cannot interact with human receptors, implying that in its current form the virus cannot infect humans.
- NeoCoV does not infect humans yet and has thus not caused any deaths.
What does the preprint say and why is it important?
- The study reports that despite their similarity, MERS-CoV and NeoCoV use different receptors to infect cells.
- The bat coronavirus NeoCoV was found to use bat ACE2 receptors for efficiently entering cells.
- The interaction between NeoCoV and bat ACE2 receptors is different from what is seen in other coronaviruses that utilize ACE2.
- However, specific mutations artificially created in the receptor-binding domain of NeoCoV can enhance its efficiency to interact with human ACE2 receptors.
- These mutations have not yet been seen in NeoCov isolates from natural settings.
Conclusion
- SARS-CoV-2 is not the first coronavirus to infect humans and cause large disease outbreaks, nor is it likely to be the last.
- The study highlights that through further adaptation, coronaviruses like NeoCoV or other related viruses could potentially gain the ability to infect humans.
Way forward
- To prevent future outbreaks, it will thus be important to monitor this family of viruses for potential zoonosis while continuing research efforts on understanding the complex receptor usage of different coronaviruses.
- Genomic surveillance of human and animal viruses is, therefore, the key to understanding the spectrum of viruses, and possibly provides early warning to potential spillover events.
Try this question from CSP 2021:
Q. The term ACE2′ is talked about in the context of:
(a) genes introduced in the genetically modified plants
(b) development of India’s own satellite navigation system
(c) radio collars for wildlife tracking
(d) spread of viral diseases
Post your answers here.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: SSLV, PSLV, GSLV
Mains level: Commercial space activities in India
The new chairman of the ISRO Dr S Somanath has indicated inauguration of indigenous new launch rockets, called the Small Satellite Launch Vehicle (SSLV).
What is SSLV?
- The SSLV is a small-lift launch vehicle being developed by the ISRO with payload capacity to deliver:
- 600 kg to Low Earth Orbit (500 km) or
- 300 kg to Sun-synchronous Orbit (500 km)
- It would help launching small satellites, with the capability to support multiple orbital drop-offs.
- In future a dedicated launch pad in Sriharikota called Small Satellite Launch Complex (SSLC) will be set up.
- A new spaceport, under development, near Kulasekharapatnam in Tamil Nadu will handle SSLV launches when complete.
- After entering the operational phase, the vehicle’s production and launch operations will be done by a consortium of Indian firms along with NewSpace India Limited (NSIL).
Vehicle details
(A) Dimensions
- Height: 34 meters
- Diameter: 2 meters
- Mass: 120 tonnes
(B) Propulsion
- It will be a four stage launching vehicle.
- The first three stages will use Hydroxyl-terminated polybutadiene (HTPB) based solid propellant, with a fourth terminal stage being a Velocity-Trimming Module (VTM).
SSLV vs. PSLV: A comparison
- The SSLV was developed with the aim of launching small satellites commercially at drastically reduced price and higher launch rate as compared to Polar SLV (PSLV).
- The projected high launch rate relies on largely autonomous launch operation and on overall simple logistics.
- To compare, a PSLV launch involves 600 officials while SSLV launch operations would be managed by a small team of about six people.
- The launch readiness period of the SSLV is expected to be less than a week instead of months.
- The SSLV can carry satellites weighing up to 500 kg to a low earth orbit while the tried and tested PSLV can launch satellites weighing in the range of 1000 kg.
- The entire job will be done in a very short time and the cost will be only around Rs 30 crore for SSLV.
Significance of SSLV
- SSLV is perfectly suited for launching multiple microsatellites at a time and supports multiple orbital drop-offs.
- The development and manufacture of the SSLV are expected to create greater synergy between the space sector and private Indian industries – a key aim of the space ministry.
Back2Basics:
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Chakmas and Hajongs
Mains level: Not Much
In Arunachal Pradesh, the Chakma and Hajong people are feeling heat since the State government decided to conduct a special census in December 2021.
What is the news?
- The North-Eastern States have had a history of being paranoid about outsiders outnumbering the indigenous communities and taking their land, resources and jobs.
- The threat from “non-locals” in a specific area has also been perceived to be from communities indigenous elsewhere in the region.
- This has often led to conflicts such as the recent attacks on non-tribal people in Meghalaya’s capital Shillong or an Assam-based group’s warning to a fuel station owner in Guwahati against employing Bihari workers.
Who are the Chakmas and Hajongs?
- The Chakmas and Hajongs of Arunachal Pradesh are migrants from the Chittagong Hill Tracts of erstwhile East Pakistan, now Bangladesh.
- Displaced by the Kaptai dam on the Karnaphuli River in the 1960s, they sought asylum in India.
- They settled in relief camps in the southern and south-eastern parts of Arunachal Pradesh from 1964 to 1969.
- A majority of them live in the Changlang district of the State today.
- Mizoram and Tripura have a sizeable population of the Buddhist Chakmas while the Hindu Hajongs mostly inhabit the Garo Hills of Meghalaya and adjoining areas of Assam.
Why was a special census of the two communities planned?
- The Arunachal Government has cited to resolve the protracted issue of racial antagonism.
- It seeks to rehabilitate the Chakma-Hajongs in other States.
- The census plan was however dropped after the Chakma Development Foundation of India petitioned the PMO.
Issues with the census
- Chakma organizations said the census was nothing but racial profiling of the two communities because of their ethnic origin and violated Article 14 of the Indian Constitution.
- It is against Article 1 of the International Convention on the Elimination of All Forms of Racial Discrimination, ratified by India.
What is their citizenship status?
- Members of the two communities had been settled in Arunachal Pradesh six decades ago with a rehabilitation plan, allotted land and provided with financial aid depending on the size of their families.
- Although local tribes claim the population of the migrants has increased alarmingly, the 2011 census says there are 47,471 Chakmas and Hajongs in the State.
- They are granted citizenship by birth under Section 3 of the Citizenship Act, 1955, after having been born before July 1, 1987, or as descendants of those who were born before this date.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Beating Retreat Ceremony
Mains level: Important national festivals and their significance
There are 26 tunes that will be played at Beating Retreat this year on January 29 skipping the “Abide with Me” tune.
What is the Beating Retreat function?
- ‘Beating Retreat’ marks a centuries old military tradition, when the troops ceased fighting, sheathed their arms and withdrew from the battlefield and returned to the camps at sunset at the sounding of the Retreat.
- The military tradition began in 17th century England, when King James II ordered his troops to beat drums, lower flags and organise a parade to announce the end of a day of combat.
- The ceremony was then called ‘watch setting’ and took place at sunset after firing a single round from the evening gun.
- The ceremony is currently held by Armed Forces in the UK, US, Canada, New Zealand, Australia, and India, among others.
How did it begin in India?
- Beating the Retreat’ has emerged as an event of national pride when the Colours and Standards are paraded.
- The ceremony traces its origins to the early 1950s when Major Roberts of the Indian Army indigenously developed the unique ceremony of display by the massed bands.
- Section D (Ceremonials) at the Ministry of Defence conducts the event.
- The ceremony consists of musical performances by the bands, who each year play Indian and western tunes.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Non-Fungible Tokens
Mains level: Challenges associated to Cryptocurrency
A French luxury fashion brand is suing American digital artist who created a series of NFTs (Non-Fungible Tokens), a rapidly growing part of the cryptoworld.
Non-Fungible Tokens
- An NFT is a unique, irreplaceable token that can be used to prove ownership of digital assets such as music, artwork, even tweets and memes.
- The term ‘non-fungible’ simply means that each token is different as opposed to a fungible currency such as money (a ten-rupee note can be exchanged for another and so on).
- Cryptocurrencies such as Bitcoin and Ethereum are also fungible, which means that one Bitcoin can be exchanged for another.
- But an NFT cannot be exchanged for another NFT because the two are different and therefore unique.
- Each token has a different value, depending on which asset it represents.
How does NFT transaction take place?
- NFT transactions are recorded on blockchains, which is a digital public ledger, with most NFTs being a part of the Ethereum blockchain.
- NFTs became popular in 2021, when they were beginning to be seen by artists as a convenient way to monetize their work.
Why are they in high demand?
- One of the other attractions is that NFTs are a part of a new kind of financial system called decentralized finance (DeFi), which does away with the involvement of institutions such as banks.
- For this reason, decentralized finance is seen as a more democratic financial system because it makes access to capital easier for lay people by essentially eliminating the role of banks and other associated institutions.
- Even so, because NFTs operate in a decentralized system, any person can sell a digital asset as one.
- This can sometimes create problems. For instance, if you were to sell someone else’s artwork as an NFT, you could essentially be infringing on a copyright.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Kerala Bird Atlas (KBA)
Mains level: Not Much
The Kerala Bird Atlas (KBA), the first-of-its-kind State-level bird atlas in India, has created solid baseline data about the distribution and abundance of bird species across all major habitats, giving an impetus to futuristic studies.
Kerala Bird Atlas (KBA)
- The KBA has been prepared based on systematic surveys held twice over 60 days a year during the wet (July to September) and dry (January to March) seasons between 2015 and 2020.
- It was conducted as a citizen science-driven exercise with the participation of over 1,000 volunteers of the birdwatching community.
- The KBA accounts for nearly three lakh records of 361 species, including 94 very rare species, 103 rare species, 110 common species, 44 very common species, and 10 most abundant species.
- It was found that the species count was higher during the dry season than in the wet season while species richness and evenness were higher in the northern and central districts than in the southern districts.
Significance of KBA
- The KBA offers authentic, consistent and comparable data through random sampling from the geographical terrain split.
- It is arguably Asia’s largest bird atlas in terms of geographical extent, sampling effort and species coverage derived from the aggregation of 25,000 checklists.
- The KBA is considered to be a valuable resource for testing various ecological hypotheses and suggesting science-backed conservation measures.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Root Bridges
Mains level: NA
The Zoological Survey of India (ZSI) has underlined some green rules for the living root bridges of Meghalaya to get the UNESCO World Heritage Site tag.
Living Root Bridges
- A living root bridge is a type of simple suspension bridge formed of living plant roots by tree shaping.
- They are common in the southern part of the Northeast Indian state of Meghalaya. Such a bridge is locally called jingkieng jri.
- They are handmade from the aerial roots of rubber fig trees (Ficus elastic) by the Khasi and Jaintia peoples of the mountainous terrain along the southern part of the Shillong Plateau.
- Most of the bridges grow on steep slopes of subtropical moist broadleaf forest between 50m and 1150m above sea level.
Why is it so unique?
- As long as the tree from which it is formed remains healthy, the roots in the bridge can naturally grow thick and strengthen.
- New roots can grow throughout the tree’s life and must be pruned or manipulated to strengthen the bridge.
- Once mature some bridges can have as many as 50 or more people crossing, and have a lifespan of up to 150 years.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Ramanuja, Vishishtadvaita
Mains level: Not Much
Work is going apace on the 216-ft tall ‘Statue of Equality’ of the 11th century reformer and Vaishnavite saint, Sri Ramanuja, to be unveiled by PM Modi next month in Hyderabad.
Statue of Equality
- The ‘Statue of Equality’, as it is called, is being installed to mark the 1,000th birth anniversary of Sri Ramanuja.
- It was built of panchaloha, a combination of gold, silver, copper, brass and zinc, by the Aerospun Corporation in China and shipped to India.
- It is the second largest in the world in sitting position of the saint.
- The monument will be surrounded by 108 “Divya Desams” of Sri Vaishnavite tradition (model temples) like Tirumala, Srirangam, Kanchi, Ahobhilam, Badrinath, Muktinath, Ayodhya, Brindavan, Kumbakonam and others.
- The idols of deities and structures were constructed in the shape at the existing temples.
Who was Sri Ramanuja?
Ramanuja or Ramanujacharya (1017–1137 CE) was a philosopher, Hindu theologian, social reformer, and one of the most important exponents of Sri Vaishnavism tradition within Hinduism.
- His philosophical foundations for devotionalism were influential to the Bhakti movement.
His works
- Ramanuja’s philosophical foundation was qualified monism and is called Vishishtadvaita in the Hindu tradition.
- His ideas are one of three subschools in Vedanta, the other two are known as Adi Shankara’s Advaita (absolute monism) and Madhvacharya’s Dvaita (dualism)
- Important writings include:
- Vedarthasangraha (literally, “Summary of the Vedas meaning”),
- Sri Bhashya (a review and commentary on the Brahma Sutras),
- Bhagavad Gita Bhashya (a review and commentary on the Bhagavad Gita), and
- The minor works titled Vedantapida, Vedantasara, Gadya Trayam (which is a compilation of three texts called the Saranagati Gadyam, Sriranga Gadyam and the Srivaikunta Gadyam), and Nitya Grantham.
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