10 October, 2019
12 Min Read
|GS-II||1,300 story of Mahabalipuram’s China connection||International Relations|
|For a happy childhood|
|GS-III||GEMINI system to aid fisherman.|
|Nobel Prize in Chemistry: for Lithium ion battery.|
GS-II: 1,300 story of Mahabalipuram’s China connection.
Mahabalipuram or Mamallapuram where PM Modi will meet China’s President Xi Jinping on October 11 & 12 in an informal Wuhan-style summit, had ancient links with Buddhism and China through the maritime outreach of the Pallava dynasty.
When the Pallavas ruled?
The name Mamallapuram derives from Mamallan, or “great warrior”, a title by which the Pallava King Narasimhavarman I (630-668 AD) was known. It was during his reign that Hiuen Tsang, the Chinese Buddhist monk-traveller, visited the Pallava capital at Kanchipuram.
Narasimhavarman II (c.700-728 AD), also known as Rajasimhan, built on the work of earlier Pallava kings to consolidate maritime mercantile links with southeast Asia.
The Descent of the Ganga/Arjuna’s Penance, a rock carving commissioned by Narasimhavarman I, with its depiction of the Bhagirathi flowing from the Himalayas, may serve as a reminder of the geography of India-China relations, and their shared resources.
In later centuries, the Coromandel coast retained its importance for trade between China and the west. In the 17th and 18th centuries, it was a staging post for the Dutch, French and British for control of the seas between South Asia and Southeast Asia, as the Europeans fought to protect their trade routes with China and other countries in the region.
The ancient port city of Pondicherry, 80 km south of Mahabalipuram, was a French colony famous for its Chinese exports known as “Coromandel goods”, including crepe de chine. Today the Union Territory, with its French legacy, Tamil residents, Bengali and international devotees of Sri Aurobindo, is among the most diverse and cosmopolitan of cities in South India.
GS-II: For a happy childhood.
India requires multiple interventions to prevent mental health disorders among adolescents.
With over 18% of India’s population aged 10-17 the future f the country will be driven by this segment.
The government has introduced many initiatives for their health, nutrition, education, and employment.
Suicide among adolescents:
Harsh Facts that need Immediate Attention:
The presence of resiliency factors can lessen the potential of risk factors to lead to suicidal ideation and behaviours. Once a child or adolescent is considered at risk, schools, families, and friends should work to build these factors in and around the youth. These include:
Suicide is the second leading cause of death among school age youth. However, suicide is preventable. Youth who are contemplating suicide frequently give warning signs of their distress. Parents, teachers, and friends are in a key position to pick up on these signs and get help. Most important is to never take these warning signs lightly or promise to keep them secret. Parents are crucial members of a suicide risk assessment as they often have information critical to making an appropriate assessment of risk, including mental health history, family dynamics, recent traumatic events, and previous suicidal behaviours.
GS-III: GEMINI system to aid fisherman.
To avoid communication blackouts that led to 20 fishermen going missing in the aftermath of Cyclone Okchi in 2017, a slew of government departments, research agencies and private companies have developed GEMINI.
Why need GEMINI?
GS-III: Nobel Prize in Chemistry: for Lithium ion battery.
This year’s Nobel Prize in Chemistry recognizes the rechargeable lithium-ion batteries that power most of the portable devices that we use, such as mobile phones and more recently the e-vehicles. The prize has been given jointly to Stanley Whittingham, John B Goodenough and Akira Yoshino.
Advantages of Li-Ion Batteries:
Low maintenance: One major lithium ion battery advantage is that they do not require and maintenance to ensure their performance. Ni-Cad cells required a periodic discharge to ensure that they did not exhibit the memory effect. As this does not affect lithium ion cells, this process or other similar maintenance procedures are not required.
High energy density: The high energy density is one of the chief advantages of lithium ion battery technology. With electronic equipment such as mobile phones needing to operate longer between charges while still consuming more power, there is always a need to batteries with a much higher energy density. In addition to this, there are many power applications from power tools to electric vehicles. The much higher power density offered by lithium ion batteries is a distinct advantage. Electric vehicles also need a battery technology that has a high energy density.
How it is different from conventional batteries?
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