Horrific Achhe Din: India 100th on hunger index; worse than Nepal, Bangladesh

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, Mar 10: Minutes after Jyotiraditya Scindia submitted his resignation to the party membership to Congress chief Sonia Gandhi, the Congress expelled him for anti-party activities after reports emerged that he had met PM Modi and Amit Shah.

Disgruntled Congress leader Jyotiraditya Scindia met Prime Minister Narendra Modi on Tuesday amid indications that he might join hands with the BJP to topple the Madhya Pradesh government.

Sources said Scindia first met Union Home Minister Amit Shah, and then the two leaders met Modi at the prime minister's residence.

Legislators loyal to Scindia, who has been upset with the Congress leadership with his marginalisation in the affairs of the Madhya Pradesh Congress, are likely to quit the party to reduce the Kamal Nath-led government to a minority.

It is likely to be followed by the Bharatiya Janata Party staking claim to form the government in the state.

The Congress President has approved the expulsion of Jyotiraditya Scindia from the Indian National Congress with immediate effect for "anti-party activities," said KC Venugopal, General Secretary Congress.

No person is, nor will be greater than the party: Congress youth wing chief

Indian Youth Congress (IYC) chief Srinivas B V on Tuesday slammed Jyotiraditya Scindia, who has announced his resignation from the primary membership of the Congress, and thanked party chief Sonia Gandhi for expelling the former Guna MP "who was promoting anti-party activities and factionalism".

"The history of 1857 and 1967 was once again repeated," Srinivas B V said, referring to the 1857 Revolt against East India Company and the role of the Scindia royals back then as well as Vijayaraje Scindia's switch from the Congress to the Jana Sangh in 1967.

"I would like to thank Congress president Sonia Gandhiji for taking the strong steps to expel the leader who was promoting anti-party activities and factionalism," the IYC chief said.

"No person is, nor will be greater than the party," he added.

New Delhi, Jan 4: The Supreme Court on Thursday extended till June 12 its earlier order of May 15 asking the government not to take any coercive action against companies and employers for violation of Centre's March 29 circular for payment of full wages to employees for the lockdown period.

A bench of Justices Ashok Bhushan, S K Kaul and M R Shah reserved the verdict on a batch of petitions filed by various companies challenging the circular of the Ministry of Home Affairs issued on March 29 asking the employers to pay full wages to the employees during the nationwide lockdown due to the coronavirus pandemic.

In the proceedings conducted through video conferencing, the top court said there was a concern that workmen should not be left without pay, but there may be a situation where the industry may not have money to pay and hence, the balancing has to be done.

Meanwhile, the apex court asked the parties to file their written submissions in support of their claims.

The top court on May 15 had asked the government not to take any coercive action against the companies and employers who are unable to pay full wages to their employees during the nationwide lockdown due to the coronavirus pandemic.

The Centre also filed an affidavit justifying its March 29 direction saying that the employers claiming incapacity in paying salaries must be directed to furnish their audited balance sheets and accounts in the court.

The government has said that the March 29 directive was a "temporary measure to mitigate the financial hardship" of employees and workers, specially contractual and casual, during the lockdown period and the directions have been revoked by the authority with effect from May 18.