That’s not a selfie, says union minister after his pic with coffin of braveheart draws flak

New Delhi, May 17: Eight of the 10 most valued domestic firms suffered a combined erosion of Rs 1,37,311.31 crore in market valuation last week, with Reliance Industries (RIL) taking the biggest knock.

Only Bharti Airtel and ITC from the top-10 list managed to close the week with gains.

RIL's market cap plunged Rs 65,232.46 crore to Rs 9,24,855.56 crore.

The market valuation of HDFC Bank declined Rs 22,347.07 crore to Rs 4,87,083.88 crore and that of Hindustan Unilever Limited tanked Rs 13,192.26 crore to Rs 4,77,458.89 crore.

ICICI Bank's market cap dropped Rs 9,770.06 crore to Rs 2,08,900.79 crore.

Infosys witnessed a decline of Rs 9,518.84 crore in valuation to reach Rs 2,77,814.09 crore while that of HDFC tumbled Rs 9,370.38 crore to Rs 2,83,293.70 crore.

The m-cap of Kotak Mahindra Bank slipped by Rs 7,805.2 crore to Rs 2,25,327.22 crore.

Tata Consultancy Services' market valuation dipped Rs 75.04 crore to Rs 7,10,439 crore.

In contrast, Bharti Airtel added Rs 13,147.89 crore to its valuation to stand at Rs 3,02,292.43 crore.

ITC's valuation also rose by Rs 7,744.11 crore to Rs 2,02,330.13 crore.

In the ranking of top-10 firms, RIL retained the number one spot, followed by TCS, HDFC Bank, HUL, Airtel, HDFC, Infosys, Kotak Mahindra Bank, ICICI Bank and ITC.

During the last week, the Sensex declined 544.97 points or 1.72 per cent.

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.

New Delhi, Jun 17: Prime Minister Narendra Modi on Wednesday called for an all-party meeting to be held on June 19 to discuss the situation at the border areas with China.

The virtual conference meeting, presided by PM Modi, will be attended by presidents of various political parties in the country.

"In order to discuss the situation in the India-China border areas, Prime Minister Narendra Modi has called for an all-party meeting at 5 PM on 19th June. Presidents of various political parties would take part in this virtual meeting," a tweet by the PMO India read.

At least 20 Indian Army personnel, including a Colonel rank officer, had lost their lives in the violent face-off in the Galwan valley area of Ladakh on June 15.

The violent face-off happened on late evening and the night of June 15 in Ladakh's Galwan Valley as a result of an attempt by the Chinese troops to "unilaterally change" the status quo during de-escalation in Eastern Ladakh and the situation could have been avoided if the agreement at the higher level been scrupulously followed by the Chinese side, India said on June 16.

The Chinese side also suffered casualties, including the death of the commanding officer of the Chinese Unit involved in the violent face-off with Indian troops, sources confirmed to news agency.