Context (AIR I HT):In J&K,Sapphire mines, of Paddar in Kishtwar districtwill be auctioned in a scientific way to boost the local economy.
About Sapphire
The word Sapphire comes from the ancient Latin and Greek used for term“blue”.
Sapphire is a type of mineral called “Corundum”, which is composed of aluminium oxide.
Corundum can have various colours, such as red, pink, yellow, orange and violet, besides blue.
Distribution
Sri Lanka remains a major source of natural sapphire, which is founded in many parts of the world.
Corundum, the mineral that sapphire belongs to, is also present in India along with kyaniteand sillimanite in the states of Assam, Meghalaya and Maharashtra.
Syenites and ultrabasic rocks in Telangana contain corundum as well.
The estimated reserves/resources of Sapphire in Indiaare 450 kg, all of which are in the ‘Remaining Resources’ category and are located in J&K.
Uses
Sapphire has emerged as a versatile material useful to a range of industries in many varied applications including LEDs,Optical and Radio Frequency Integrated Circuits.
Why is Kashmir sapphire famous?
Kashmir Sapphire is famous for its exceptional quality, rarity, and beauty.
Kashmir sapphire was discovered in the late 19th century in the remote Zanskar range of the Himalayas, and the original mines were soon exhausted.
Since then, only a few new sapphires have been found in Kashmir, making them extremely scarce and valuable.
Kashmir sapphire is also highly sought after because it is usually untreated, unlike most of the sapphires on the market that are heated to improve their colour.
It is also known to produce asterism or astar effect when cut as a cabochon.
This is caused by the reflection of light from microscopic particles aligned along the crystal axes.
Cabochon: A cabochon is a gemstone that has been shaped and polished, as opposed to faceted.
The resulting form is usually a convex obverse with a flat reverse.
Context (IE): Hurricane Hillary in a unprecedented way battering California and Mexico.
As per latest estimates, the hurricane will make landfall in the Baja peninsula in Mexico.
Tijuana, a border metropolis in Mexico, is at risk of landslides and flooding, because of its hilly terrain, extremely high density of population, and poor quality of housing and infrastructure.
Tropical Cyclones
A cyclone is a system of high-speed winds rotating around a low-pressure area (developed over warm waters). It blows counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Tropical cyclones are cyclones that originate over tropical oceans in late summer.
Why Hurricane Hillary is Unprecedented/Rare?
Hurricane Hillary is Category 4 storm that have formed over the eastern Pacific Ocean and is currently inland over California.
Though Florida, Louisiana and Texas on the Gulf of Mexico, face the havoc of hurricanes, but California and Mexico in the west, seldom faces it.
Reasons Why East Pacific coast Seldom Sees Tropical Storms and Hurricanes
Ocean Waters Temperature
Ideal Condition
Ocean waters must be above 26°C, so that, they can act as the source of moisture for the storm.
The condensation of moisture releases enough latent heat of condensation to drive the storm.
Below this threshold temperature, hurricanes will not form or will weaken rapidly.
East Pacific Coast Condition
East Pacific Coast (or Western US coast) remains below26°C during the hurricane season.
This happens because the cold current steers colder waterfrom higher latitudes toward equatorial regions along the East Pacific coast.
Vertical Wind Shear
Ideal Condition
Wind shear means differences between wind speeds at different heights.
Hurricanes develop when the wind shear low.
They can’t emerge if the upper level wind shear is strong as it destroy the storms structure by displacing the warm temperatures above the eye and limiting the vertical accent of air parcels.
East Pacific Coast Condition
Wind shear in the eastern Pacific is much stronger than the Gulf of Mexico, causing less frequent hurricanes along the western coast.
Wind Steering Patterns
Ideal Condition
Wind steering in the context of hurricanes refers to the process by which the movement and behavior of a hurricane are influenced by the surrounding atmospheric flow patterns.
For a coast to be hurricane-prone, the wind steering pattern must direct the hurricanes toward it.
East Pacific Coast Condition
Trade winds play a crucial role in directing hurricanes in the Pacific Ocean and they divert hurricanes away from the Pacific East coast (or Western US coast).
Other Ideal Conditions Necessary for the Formation of a Tropical Cyclone (or Hurricane)
Apart from ocean waters temperature above 26°C and low vertical shear, other necessary for the formation of a hurricane are:
Presence of the Coriolis force enough to create a cyclonic vortex
Coriolis force is zero at the equator (no cyclones at equator because of zero Coriolis Force) but it increases with latitude.
Coriolis forceat 5° latitude is significant enough to create a storm (cyclonic vortex).
About 65% of cyclonic activity occurs between 10° and 20° latitude.
Low-pressure Area
Existence of low pressure area acts as the seed for cyclone.
Air flows from areas of higher pressure to lower pressure, creating circulating winds around the center of the low-pressure system.
Upper-level divergence
A well-developed divergence in the upper layers of the atmosphere is necessary so that the rising air currents within the cyclone continue to be pumped out and a low pressure is maintained at the centre.
Temperature Contrast Between Air Masses
The convergence of air masses of different temperaturesresults in instability causing low-level disturbances(low-pressure cells) which are a prerequisite for the origin and growth of violent tropical storms.
{GS2 – Education – Issues – 2023/08/21} TN CM Wants Education Back in State List
Context (TH): The Tamil Nadu CM called for transferring education back to the State List of the Seventh Schedule of the Constitution.
The CM’s remarks came in the aftermath of the TN Governor declining to provide his assent to the TN State government’s bill seeking exemption from the NEET.
National Eligibility and Entrance Test (NEET)
It is an all-India entrance test for admission to undergraduate medical courses.
NEET has been conducted since 2013.
Issues
Some States are opposing the NEET on the following grounds:
NEET fosters inequity and benefits affluent candidates who can afford expensive coaching.
The centralised admission test causes a monetary burden and inconvenience for students.
The national level tests favour students from the Central Board of Secondary Education (CBSE) (Close to 59% of the shortlisted students in IIT JEE were from the CBSE Board alone).
It undermines the autonomy of the States on education matters.
(Update) Exemption for TN
Is it possible to exempt Tamil Nadu from NEET for admissions to medical courses?
Yes. If the President gives a nod to TN government’s Bill to exempt TN from NEET, TN will be exempted and will have state level exam for admission to medical courses.
Education in India
The IC, in its original enactment, defined education as a State subject.
The 42ndConstitutional Amendment Act of 1976moved education to theconcurrent list.
The 86th Constitution Amendment Act inserted Article 21A in the IC, making education a Fundamental Right for Children aged 6 to 14 years.
Right to Education (RTE) Act, 2009, provides free and compulsory education to all children aged 6 to 14 years.
Education as a concurrent subject
It allows for flexibility and coordination between the central and state governments.
It enables the central government to set specific national-level educational standards and policies while permitting states to address local needs and issues in education.
Seventh Schedule of the IC
It divides legislative powers between the central government (Union) and the state governments.
The distribution of powers helps maintain a balance between the central government’s authority and the autonomy of the state governments.
It contains three lists:
Union List
State List
Concurrent List
Union List: This list includes subjects on which only the central government can make laws.
Examples: Defense, Foreign Affairs, Banking, Currency, and Atomic Energy.
State List: This list consists of subjects on which only the state governments can make laws.
Examples:Police, Public Health, Agriculture, Land, and Local Government.
Concurrent List: This list includes subjects on which both the central and state governments can make laws. However, the central law prevails in case of a conflict between central and state laws.
Examples:Criminal Law, Marriage, Education, Forests, Protection of Wild Animals, etc.
Additionally, the Residuary Power belongs to theCentral Government, allowing it to legislate on matters not mentioned in any list.
42nd Constitutional Amendment Act of 1976
It moved the following subjects from the State list to the Concurrent list:
Education
Forest
Protection of wild animals and birds
Weights and measures
Administration of justice, constitution, and organisation of all courtsexcept the supreme court and high courts.
{GS2 – Health – Initiatives – 2023/08/21} GIDH
Context (WHO | TH): The World Health Organization (WHO) and the G20 India presidency announced a new Global Initiative on Digital Health (GIDH).
Global Initiative on Digital Health (GIDH) is a WHO-managed network (Network of Networks) of stakeholders to facilitate:
Implementation of the Global Strategy on Digital Health 2020-2025.
Other WHO norms and standards for Digital Health System Transformation.
It is a platform to enable a global ecosystem to work collectively to promote country capacity and strengthen international cooperation in digital health.
It will promote equitable access to digital health by addressing challenges such as duplication of efforts and “products-focused” digital health transformation.
Four foundational pillars
Country Needs Tracker: GIDH will ensure that digital health investments are informed by country priorities.
Country Resource Portal: It will analyse the resourcing gaps in digital health.
Transformation Toolbox: Quality-assured tools and resources will strengthen the country’s capacity to manage its national digital health transformation journey.
Convening and Knowledge Exchange: Promoting strengthened collaboration and knowledge exchange across global, regional, and national networks in digital health.
GIDH and G20 Theme
GIDH will ultimately aim to align efforts to support the Global Strategy on Digital Health 2020–2025.
This sharing approach is linked to India’s philosophy of “VasudhaivaKutumbakam” (whole world is one family).
Digital health
It is a proven accelerator to advancehealth outcomes and achieve Universal Health Coverage (UHC) and health-related Sustainable Development Goals.
WHO’s first resolution on ehealth (2005)
In 2005, the World Health Assembly through its resolution on eHealth urged Member States:
To consider drawing up a long-term strategic plan for developing and implementing eHealth services.
To develop the infrastructure for information and communication technologies for health.
To promote equitable, affordable, and universal access to their benefits.
Over 120 WHO Member States have developed a national digital health policy or strategy.
Global Strategy on Digital Health 2020-2025
It was adopted by the World Health Assembly in 2020.
It presents a roadmap to link the latest developments in innovation and digital health, and use this tool to improve health outcomes.
The purpose is to support countries in strengthening their health systems through the application of digital health technologies and achieve the vision of health for all.
Health and SDGs
SDG 3, “Good Health and Well-Being,” calls on countries to ensure healthy lives and promote well-being for all at all ages.
Almost all of the other sixteen goals are directly related to health or will contribute to health indirectly.
{GS2 – IR – Groupings – 2023/08/21} BRICS
Context (TH): PM Narendra Modi is set to visit South Africa for the BRICSSummit.
BRICS is a grouping of the world economies of Brazil, Russia, India, China,andSouth Africa formed in 2010.
Evolution of BRICS
In 2001, British economist Jim O’Neill coined the term ‘BRIC’, standing for the initials of four emerging economies at the time – Brazil, Russia, India, and China.
The leaders of BRIC (Brazil, Russia, India, and China) countries met for the first time in St. Petersburg, Russia in July 2006.
In September 2006, the group was formalised as BRIC.
The first formal meeting was held in 2009 in Russia. South Africa joined in 2010, expanding it to ‘BRICS’.
Now, BRICS includes these five economies, representing:
42% of the world’s population
30% of the world’s territory
23% of global GDP
18% of world trade.
Rationale behind creating BRICS
To counter the dominance of European and Western countries at international forums and institutions, such as the United Nations.
To represent global south at the centre of international agenda-setting.
BRICS agenda
The chairmanship rotates among the group annually.
The Chair has to set the agenda,priorities,andcalendarfor the year.
This year, the agenda of the 15th Summit is ‘BRICS in Africa: Partnership for Mutually Accelerated Growth, Sustainable Development and Inclusive Multilateralism’.
Importance for India
The platform could be a means of establishing its larger efforts to represent the Global South.
The Summit could move things along from a diplomatic perspective.
This is the first in-person summit since the military standoff with China at the Line of Actual Control began in 2020. This meeting could resolve the LAC situation.
Just over two weeks after the BRICS summit, India will host the G20 summit, and India will want to ensure full attendance by the leaders including all BRICS members.
The 2017 Doklam stand-off at the Bhutan-India-China trijunction was resolved just days before Modi and Xi were scheduled to meet for the then BRICS summit in China.
All BRICS countries are members ofG20.
New Development Bank (NDB/BRICS Bank)
NDB formally came into existence as a legal entity in 2015 on the eve of the Ufa summit.
It was established by BRICS member states in 2016.
It has its headquarters in Shanghai, China.
In 2018, the NDB received observer status in the UN General Assembly.
Its objective is to support the infrastructure and sustainable development projects in BRICS and other emerging economies, as well as in developing countries.
The NDB President is elected on a rotational basis from one of the founding members, and there are four Vice Presidents from each of the other four founding members.
K.V. Kamath from India was the first elected president of the NDB.
Membership
All members of the United Nations could be members of the bank; however, the share of the BRICS nations can never be less than 55% of voting power.
As of now, nine countries are members of BRICS.
All BRICS members are members of NDB.
NDB admitted Bangladesh, United Arab Emirates (UAE), Egypt and Uruguay as its new members in 2021.
NDB included UAE as a prospective member.
Prospective members: Members that have been admitted by NDB’s Board of Governors and will officially become a member country once they deposit their instrument of accession.
Contribution and Voting
The New Development Bank have an initial subscribed capital of US$ 50 billion and an initial authorized capital of US$ 100 billion.
The initial subscribed capital is equally distributed amongst the founding members. The voting power of each member shall equal its subscribed shares in the capital stock of the Bank.
Each member cannot increase its share of capital without all other four members agreeing.
Context (TH | IE): After instances of pilots dying of cardiac arrests and pilots complaining of fatigue, there are growing concerns regarding the adherence to Flight Duty Time Limitation (FDTL) norms.
What is Pilot Fatigue?
Pilot fatigue (or flight crew fatigue) refers to the state of physical and mental exhaustion which results in impaired cognitive function, decreased alertness, and reduced decision-making abilities of the pilots.
It is a significant concern in aviation safety.
Key factors contributing to pilot fatigue include:
Long Duty Hours
Time Zone Changes
Overnight Operations
Unpredictable Schedules
Pressure to Fly
Sleep Disruption
Cabin Conditions
Flight Duty Time Limitation (FDTL)
FDTL is a set of regulations that limit the number of hours that pilots can fly and the number of consecutive days that they can work.
These regulations are designed to prevent pilot fatigue, which can lead to accidents.
The FDTL regulations vary from country to country.
Smaller airports are usually more susceptible to FDTL-related disruptions because they are unlikely to have standby crew, and it is difficult to mobilise them at short notice.
Flight Duty Time Limitation (FDTL) in India
In India, the FDTL regulations are set by the Directorate General of Civil Aviation (DGCA).
The following are the FDTL regulations for pilots in India:
Flight time: A pilot can fly a maximum of 8 hours in a day.
Duty period: A duty period is the time from the pilot’s report time to the end of the flight. A pilot can work a maximum of 13 hours in a duty period.
Rest period: A rest period is the time between duty periods. A pilot must have a minimum of 10 hours of rest between duty periods.
Cumulative flight time: A pilot can fly a maximum of 35 hours in a week.
Cumulative duty period: A pilot can work a maximum of 90 hours in a 28-day period.
These are just the general FDTL regulations.
There are specific regulations for different types of flights, like night flights and international flights.
Context (PIB):Warehousing Development Regulatory Authority (WDRA) organized one day conference on electronic-Negotiable Warehouse Receipts (e-NWR).
Warehouse Receipt (WR) is a form of documentation used within futures markets to ensure the quality and quantity of a particular commodity stored within an approved facility.
Instead of moving the actual goods under contract immediately, these receipts are used to settle futures contracts.
It can be negotiable or non-negotiable.
Negotiable Warehouse Receipt (NWR)
A warehouse receipt is negotiableif the goods are to betransferred to another party.
Farmers can seek loans from banks against these receipts issued to them against their storage.
These receipts issued by the warehouses registered with the WDRA.
Benefits of NWR
It helps the farmers:
To avoid distress sales of agricultural produce during the peak marketing season
To avoid the post-harvest storage loss
To increase the income
Non-negotiable Warehouse Receipt
A warehouse receipt is non-negotiableif the goods are not transferable.
It serves as proof of storage or possession.
Types of Negotiable Warehouse Receipt (NWR)
Paper based NWR
WDRA initially implemented paper based NWR system. But there were many risks involved in the paper-based warehouse receipts. Such as:
Risk of fudging, overwriting, damage, loss, etc
Issuance of WR without receiving goods
Issuance of duplicate WR without following the procedure
Issuance of multiple WRs for the same stock
Possible delivery of stocks without surrenders of warehouse receipt.
So, in 2014-15, WDRA initiated the implementation of IT based platform for registration of warehouses and setting up Repositories for issuance of NWRs in electronic form (e-NWR)
Electronic NWR (e-NWR)
It was launched in 2017.
It can be used for deposit and withdrawal of commodities as well as trade transactions.
It can be traded through off-market or online trading platforms.
It has been integrated with the electronic National Agriculture Market (e-NAM) platform by providing an interface between e-NAM and repositories.
It can be auctioned under certain conditions such as:
Loan not repaid.
Delivery not taken on expiry.
Damage or spoilage of the commodity in the warehouse
Warehousing Development and Regulatory Authority (WDRA)
It was setup in 2010 under the Warehousing (Development and Regulation) Act, 2007 by Ministry of Consumer Affairs, Food and Public Distribution.
The main objective of WDRA is to implement Negotiable Warehouse Receipt (NWR) System in the country.
It helps farmers:
To store their produce in scientific storage godowns near by their farms
To seek loan from banks against their NWR.
Functions of WDRA
Registration of warehouses
Regulations of negotiability of warehouse receipts
Context (PIB | TH): Information regarding National Food Security Mission (NFSM)-Pulses and PM-AASHAwas provided in the Rajya Sabha regarding pulses.
Moreover, though the production of pulses is increasing in recent years, but, pulses prices may spiral this year due to deficient rain.
Sown area for pulses has declined than last year and till now has not shown any recovery.
Pulses
Pulses (or legumes) are the edible seeds of leguminous plants cultivated both for food and feed.
Pulses are different from crops; pulses are harvested when the seeds become drywhereas crops are harvested when plants are still green.
Dried beans, lentils, and peas are the most consumed types of pulses.
Pulses do not includeleguminous plants that are:
Harvested green (e.g., green peas, green beans; these are classified as vegetable crops)
Used for oil extraction (e.g., soybean and groundnuts)
Used exclusively for sowing purposes (e.g., seeds of clover and alfalfa)
Leguminous plants: Plants that have nodules in their roots that contain nitrogen-fixing bacteria (Rhizobium).
Ideal growing conditions for pulses:
Temperature: Between 20-27°C
Rainfall: Around 25-60 cm
Soil Type: Sandy-loamy soil is best. But it can also be grown in well-drained alluvial, loamy, and moderately acidic, and saline soil.
World Pulse Day
Every year, February 10th is celebrated as World Pulse Day.
The aim is to aware people of the importance of pulses as a global staple food.
World Pulses Day, 2023 theme: Pulses for a Sustainable Future.
Significance of Pulses
Nutritional Value
Pulses have high protein content; they are ideal source of protein where meat and dairy are physically or economically not accessible and for people with vegetarian and vegan diets.
Pulses are low in fat and sodium and rich in soluble fibre, and iron.
Because of these qualities, they can lower cholesterol and control blood sugar and help combat diabetes, heart diseases, and obesity.
Food Security
Farmers can both sell and consume pulses. Thus, it helps farmers maintain household food security and creates economic stability.
Agricultural Benefits
The nitrogen-fixing properties of pulses improve soil fertility, which increases and extends the productivity of the farmland.
Using pulses as intercropping and cover crops, helps farmers in:
Increasing yield
Reducing the risk of crop failure due to pest and disease attacks
Suppressing weeds
Nutrient cycling
Water use efficiency
Crop diversification
Pest and disease management
Intercropping: It is an agricultural practice in which two or more crops are grown together in the same field.
Cover crop (or green manure crop): It is a type of crop grownto benefit the soil, rather than for harvest or consumption. Cover crops are planted to cover and protect the soil between main crop plantings, during fallow periods, or as part of a crop rotation system.
Environmental Benefit
Pulses can help in climate change mitigation by reducing dependence on the synthetic fertilizers used for adding nitrogen into the soil.
Greenhouse gases are released during the manufacturing and application of these synthetic fertilizers which is detrimental to the environment.
Drought Resistant
Pulses require lower water than other food crops, so, they can withstand drought.
They are important for combating water scarcity resulting from climate change and for improving the income of farmers in drought-prone regions.
Help Achieve Sustainable Development Goals (SDGs):
Because of their drought-resistant, high nutrient, and soil fertility-improving qualities, they can help to achieve SDGs 2, 3, and 13.
Goal 2: Zero Hunger – End hunger, achieve food security and improved nutrition, and promote sustainable agriculture
Goal 3: Good Health and Well-Being – Ensure healthy lives and promote well-being for all at all ages
Goal 13: Climate Action – Take urgent action to combat climate change and its impacts by regulating emissions and promoting developments in renewable energy
Pulses in India
India is the largest producer (25% of global production), consumer (27% of world consumption), and importer (14%) of pulses in the world.
They account for around 20% of the area under foodgrains and contribute around 7-10% of the total foodgrains production in the country.
They are grown in Kharif, Rabi, andZaid seasons, but Rabi pulses contribute 60% of the total production.
In India, gram is the most dominant pulse (40% of the total production) followed by Tur/Arhar (15-20%) and Urad (Black Matpe) and Moong (8-10% each).
GoI has implemented an umbrella scheme PM-AASHA to ensure Minimum Support Price (MSP)to farmers for their produce.
Three Components of PM-AASHA
Price Support Scheme (PSS)
In PSS, physical procurement of pulses, oilseeds, and copra will be done by Central Nodal Agencies with the proactive role of State governments.
The National Agricultural Cooperative Marketing Federation of India (NAFED), and the Food Cooperation of India (FCI) will take up PSS operations in states/districts.
The procurement expenditure and losses due to procurement will be borne by GoI.
Price Deficiency Payment Scheme (PDPS)
Under PDPS, it is proposed to cover all oilseedsfor which MSP is notified.
In this direct payment scheme, the difference between the MSP and the selling/modal price will be made to pre-registered farmers.
All payments will be done directly into the registered bank account of the farmer.
This scheme does not involve any physical procurement of crops.
Private Procurement Stockist Scheme (PPSS)
Under PPPS, the private sector will take part in the procurement operations.
Therefore in addition to PDPS, states have the option to roll out PPSS on a pilot basis in selected districts/ Agricultural Produce & Livestock Market Committees (APMC) for oilseeds procurement.
Minimum Support Price for Pulses
Minimum Support Price (MSP) is a minimum price set by the government for certain agricultural commodities to protect farmers from fluctuations in market prices and ensure a minimum level of income for their produce.
Simply, the MSP is the rate at which the government buys grains from farmers.
The MSPs are fixed by the Central government on the recommendations of theCommission for Agricultural Costs and Prices (CACP) under the Ministry of Agriculture.
After receiving the feedback Cabinet Committee on Economic Affairs (CCEA) of the Union government takes a final decision on the level of MSPs.
The Food Corporation of India (FCI), the nodal agency, along with other State Agencies undertakes procurement of crops.
The MSPs are announced before the sowing season by the government.
The government is not legally bound to pay the MSP to farmers.
So, though the government encourages the procurement of crops at MSP through its agencies, there is no legal obligation for the government to purchase all crops at MSP or to compensate farmers if market prices fall below the MSP.
GoI fixes MSPs for 23 farm commodities based on CACP recommendations:
7 cereals (paddy, wheat, maize, bajra, jowar, ragi, and barley)
5 pulses (chana, arhar/tur, urad, moong, and masur)
7 oilseeds (rapeseed-mustard, groundnut, soyabean, sunflower, sesamum, safflower, and nigerseed)
4 commercial crops (cotton, sugarcane, copra, and raw jute)
In addition, GoI also fixes the MSP of toria and de-husked coconut on the basis of the MSPs of rapeseed/mustard and copra respectively.
{GS3 – S&T – Tech – 2023/08/21} 3D-Printed Post Office
Context (TH I IE): India’sFirst 3D-Printed Post Officewas inaugurated in Bengaluru, built by L&T Limited with support from IIT Madras, and completed in just 43 days.
3D Printing
3D printing is a process of creating Three-Dimesional objects from digital models by adding material layer by layer.
It involves building up layers of materials like plastic, composites, or bio-materials to construct objects with varying shapes, sizes, rigidity, and colour.
This process allows for more efficientandcustomized production compared to traditional subtractive manufacturing methods.
Types of 3D Printing Technology
Fused Deposition Modeling (FDM): FDM uses melted plastic filament to create objects layer by layer.
Stereolithography (SLA): SLA uses a liquid resin that is cured with UV light to create solid objects.
Selective Laser Sintering (SLS): SLS uses a laser to melt and fuse together powdered material, such as metal, plastic, or ceramic.
Digital Light Processing (DLP): DLP also uses a liquid resin similar to SLA, but it uses a digital projector to cure and create the final object.
Direct Energy Deposition (DED): DED uses a high-energy heat source to melt and deposit material and is often used in metal printing.
Electron Beam Melting (EBM): EBM uses an electron beam to melt and fuse together metal powder to create solid metal objects It is similar to SLS, but uses an electron beam instead of a laser.
Laminated Object Manufacturing (LOM): During the LOM process, layers of adhesive-coated paper, plastic or metal laminates are fused togetherusing heat and pressure and then cut to shape with a computer controlled laser or knife.
Application of 3-D printing
Manufacturing: prototyping, tooling, end-use parts
Construction: architectural models, building components
Aerospace: aircraft parts, rocket engines
Automotive: car parts, engine components
Fashion: jewelry, accessories, clothing
Food: edible objects, food packaging
Art: sculptures, figurines, jewelry
Education: teaching tools, models, simulations
Research: prototyping, testing, drug delivery
Consumer: toys, gadgets, home goods
{Prelims – AIH – 2023/08/21} Megalithic Site
Context (TH): A large number of megalithic“hat stones”were found at a single site during an archaeological excavation in Kerala.
What are Megaliths?
Megaliths are large stones used to construct prehistoric structures or monuments, either alone or with other stones.
They were built as either burial sites or commemorative memorials.
In India, most megaliths date back to the Iron Age (1500 BC to 500 BC), though some sites precede the Iron Age, extending up to 2000 BC.
Different Types Of Megalithic Structures
Stone Circles: Also known as “cromlechs,” these are circles of standing stones, often used for ceremonialor astronomical purposes.
Dolmens: These structures consist of a large capstone supported by two or more upright stones, forming a chamber below. They were often used as tombs or burial chambers.
Cists: These are small, stone-built coffin-like boxes used to hold the bodies of the dead. They were often buried underground and could be single- or multiple-chambered.
Monoliths: These are single-standing stones erected in prehistoric times. The term is sometimes used interchangeably with “megalith” and “menhir.”
Capstone style: This refers to single megaliths placed horizontally over burial chambers, without the use of support stones.
Key findings
Hat stones, popularly called Thoppikkallu in Malayalam, are hemispherical laterite stones used as lids on burial urns during the megalithic period and are found here.
The findings may throw light on the life and culture of people who lived in Kuttippuram village, near Tirunavaya, Kerala more than 2,000 years ago.
{Prelims – Envi – Invasive Species – 2023/08/21} Yellow-Legged Hornet
Context (TP): The first live specimen of a yellow-legged hornet, which “poses a threat to honeybees and other pollinators,” has been detected in the wild in the United States For the first time.
The Asian hornet, or yellow-legged hornet is a species indigenous to southeast asia.
It is a predatory insect that feeds on other social bees and wasps, including honey bees.
This species has become threat to local enviroment as it is invasive nature.
It is distinct from the infamous Asian Giant Hornet,also referred as “murder hornet,“ which is a different and larger species found in parts of Asia, including Japan.
While both species are predators of bees, the Yellow-Legged Hornet has become a particular concern in parts of Europe due to its invasive nature and impact on local ecosystems.
Features
It has a dark brown or black body with a distinctive bright yellow or orange band on its fourth abdominal segment.
As its name suggests, it has yellow legs, which is a key identifying feature.
It is a very aggressive species and its sting is very painful.
{Prelims – Envi – Species – 2023/08/21} White-Bellied Sea Eagle
Context (TH): The white-bellied sea eagle is a large diurnal bird of prey in coastal areas of Southeast Asia, Australia, and New Guinea.
Like many raptors, the female is larger than the male.
Habitat: They live primarily in terrestrial habitats near the ocean, especially coasts, islands, and estuaries, but they also live in forested areas with access to smaller bodies of water.
Most live at elevations around 900 m, with the highest elevation recorded at 1,700 m.
Although rated as Least Concern globally, it has declined in parts of southeast Asia such as Thailand, and southeastern Australia.
What is a Diurnal bird?
A diurnal bird is a bird species that is primarily active during the daytime, as opposed to nocturnal birds, which are active at night.
{Prelims – Envi – Species In News – 2023/08/21} Namoh 108 & NBRI-Nihar
Context (HT I TW): CSIR-National Botanical Research Institute (NBRI) launched an improved variety of the National Flower Lotus with 108 petals called ‘Namoh 108′.
The Lotus variety is more weather resilient and can flower from March to December.
CSIR-NBRI released apparel made from lotus fibre and a perfumedeveloped from Lotus plants.
This is the only lotus variety in India to have had its genome sequenced.
Genome sequencing is the process of determining the order of the four chemical building blocks of DNA, called bases, that make up the genetic code of an organism.
These bases are Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
The sequence of these bases can reveal a lot of information about the organism, such as its traits, functions, evolution, and diseases.
NBRI-Nihar
A new variety of Aloe Vera‘NBRI-Nihar’ was also launched.
As per the Institute the new variety has 2.5 times more gel yield in comparison to normal Aloe vera
It is also the least affected by bacterial and fungal diseases.
National Botanical Research Institute (NBRI)
NBRI is a premier plant science research institute under the Council of Scientific and Industrial Research (CSIR) in India.
The NBRI was established in 1953 as the National Botanical Gardens, and later renamed as the National Botanical Research Institute in 1978.
It’s headsquarter is in Lucknow, Uttar Pradesh.
The NBRI has a mandate to undertake basic and applied research on various aspects of plant science, such as plant diversity, systematics, conservation,genetic improvement etc.
{Prelims – Sports – 2023/08/21} Women’s World Cup
Context (BBC):Spain beat England in the final of the Women’s World Cup (Football).
Women’s World Cup 2023 was the ninth edition of the FIFA Women’s World Cup.
This is the first title for a Spanish women’s team in the Women’s World Cup.
With this win, Spain became only the second nation to clinch both the men’s and the women’s World Cups after Germany.
Women’s World Cup titles:
The United States is the most successful nation at the Women’s World Cup with four titles.
Germany has won the tournament twice.
Japan, Norway, and Spain now have a title each.
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