No discrimination against anyone on basis of religion: Rajnath

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.

Mumbai, Mar 13:  Investor wealth worth nearly Rs 12 lakh crore was wiped out in less than 15 minutes of trading on the stock exchanges on Friday, with the two benchmarks, the BSE Sensex and the NSE Nifty, crashing over 10 per cent.

The 30-share BSE Sensex plummeted 3,380.59 points, or 10.31 per cent, to 29,397.55. It hit an intra-day low of 29,388.97, falling up to 3,389.17 points.

Trading was halted for 45 minutes in the early session after the index hit its lower circuit limit.

The BSE and NSE benchmark indices, however, pared most losses with the Sensex trading 835.40 points, or 2.55 per cent, lower at 31,942.74, and the Nifty was down 253.25 points or 2.64 per cent at 9,336.90 at 10.40 am.

The mayhem on Dalal Street eroded investor wealth worth Rs 12,92,479.88 crore, taking the total m-cap to Rs 1,12,78,172.75 crore on the BSE at 1020 hours.

The m-cap of BSE-listed companies stood at Rs 1,25,70,652.63 crore at the end of trading on Thursday.

Traders said besides global selloff, incessant foreign fund outflows also weighed on investor sentiments.

On a net basis, foreign institutional investors sold equities worth Rs 3,475.29 crore on Thursday, data available with stock exchanges showed.

On the BSE, 1,279 scrips declined, while 193 advanced and 40 remained unchanged.

Volatility heightened in global markets as benchmarks world over went into panic mode, insinuating a freakish selloff.

Bourses in Shanghai dropped over 3.32 per cent, Hong Kong 5.61 per cent, Seoul 7.58 per cent and Tokyo cracked up to 7.97 per cent.

Wall Street lost 10 per cent in overnight trade.

More than 1,30,000 cases of the novel coronavirus have been recorded in 116 countries and territories, killing at least 4,900 people.

The number of coronavirus patients in India has risen to 74, as per the health ministry.

Mumbai, Mar 27: The Reserve Bank of India (RBI) on Friday lowered the key repo rate by 75 basis points to 4.4 per cent in a bid to arrest the economic slowdown amid coronavirus (COVID-19) outbreak.
The reverse repo rate now stands at 4 per cent, down by 90 basis points, said RBI Governor Shaktikanta Das adding this has been done to make it unattractive for banks to passively deposit funds with the central bank and instead lend it to the productive sectors.
The six-member monetary policy committee (MPC) met on March 24, 25 and 27 and voted 4:2 in favour of the repo rate reduction. The MPC also decided to continue with the accommodative stance as long as it is necessary to revive growth and mitigate the impact of COVID-19 on the economy while ensuring that inflation remains within the target.
"The need of the hour is to shield the economy from the pandemic," said Das. "We need to mitigate the impact of coronavirus, revive economic growth and provide financial stability."
Repo rate is the rate at which a country's central bank lends money to commercial banks, and the reverse repo rate is the rate at which it borrows from them.
The RBI Governor further said that the economic growth and inflation projection will be highly contingent depending on the duration, spread and intensity of the pandemic.
"Global economic activity has come to a near standstill as COVID-19 related lockdowns and social distancing are imposed across a widening swathe of affected countries. Expectations of a shallow recovery in 2020 from 2019's decade low in global growth have been dashed," said Das.
"The outlook is now heavily contingent upon the intensity, spread and duration of the pandemic. There is a rising probability that large parts of the global economy will slip into recession," he said.
However, the RBI has injected liquidity of Rs 2.8 lakh crore via various instruments equal to 1.4 per cent of GDP. "Along with today's measures, liquidity measures equal to 3.2 per cent of GDP. The RBI will take continuous measures to ensure liquidity in the system."
The RBI governor has said that all banking institutions can offer a three-month moratorium on all loans for a period of three months. The RBI has also allowed banks to restructure the working capital cycle for companies without worrying that these will have to be classified as a non-performing asset (NPA).
The three-month moratorium will permit banks to avoid a large onset of NPAs during the 21-day lockdown and keep their books healthy.
Das said banks and other financial institutions should do all they can to keep credit flowing to economic agents facing financial stress on account of the isolation that the virus has imposed.
"Market participants should work with regulators like the RBI and the Securities and Exchange Board of India (SEBI) to ensure the orderly functioning of markets in their role of price discovery and financial intermediation," he said.