Demolish Delhi Jama Masjid, hang me if idols are not found: Sakshi Maharaj

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, Feb 3: In the third such incident inside of a week, two unidentified persons opened fire outside Gate No. 5 of Jamia Millia Islamia on Sunday night, the Jamia Coordination Committee (JCC) said.

A statement issued by the committee, a group comprising students and alumni of the university formed to protest against the Citizenship Amendment Act, said the attackers were on a red Rcooty.

No one was injured in the attack. One of the miscreants was wearing a red jacket, the statement said.

"Firing has taken place at Gate No.5 of Jamia Millia Islamia right now by two unidentified persons. As per report, one of them was wearing a red jacket and driving a red Scooty having vehicle no. 1532 or 1534," the statement said.

Police said they were verifying the JCC's claims.

Asim Mohammed Khan, former Congress MLA from Okhla, said the incident occurred around 11.30 pm. "We heard the gunshot. That is when we stepped out to see and the two men left on a Scooty," a student said.

"We have taken down the vehicle number and called police," he added.

This is the third firing incident in the Jamia Nagar area in a week.

On Thursday, a minor fired at anti-CAA protesters marching towards Rajghat, injuring a student.

Two days later, a 25-year-old fired two rounds in air in Shaheen Bagh in Jamia Nagar. No one was hurt in the incident.

The incident on Sunday night triggered panic in the area. A police vehicle had reached the spot after the incident but was chased away by angry students.

Hundreds of students and locals gathered outside the university.

Many raised slogans against the Delhi Police. They also staged a dharna outside the Jamia Nagar police station.

Shezad Ahmed, a JMI student and resident of Zakir Nagar, said they were not even allowed to protest peacefully.

"We are not going to be deterred by such incidents. We will continue with our protest," he added.

New Delhi, May 24: The Indian economy is likely to slip into recession in the third quarter of this fiscal as loss in income and jobs and cautiousness among consumers will delay recovery in consumer demand even after the pandemic, says a report.

According to Dun & Bradstreet's latest Economic Observer, the country's economic recovery will depend on the efficacy and duration of implementation of the government's stimulus package.

"The multiplier effect of the stimulus measures on the economy will depend on three key aspects i.e. the time taken for effecting the withdrawal of the lockdown, the efficacy of implementation and duration of execution of the measures announced," Dun & Bradstreet India Chief Economist Arun Singh said.

The report noted that the government's larger-than-expected stimulus package is likely to re-start economic activities.

Besides, measures taken by the Reserve Bank of India like reducing the repo rate by a further 40 basis points to 4 per cent, extending the moratorium period by three months and facilitating working capital financing will also help stimulate the momentum.

Singh said while the measures announced by the government are "positive", most of them have been directed towards strengthening the supply side of the economy, and "it is to be noted that supply needs to be matched with demand", he said.

Besides, "in the absence of cash-in-hand benefits under the government's stimulus package, demand for goods and services is expected to remain depressed", he added.

He further said the loss in income and employment opportunities, and cautiousness among consumers, will lead to a delayed recovery in consumer demand, even after the pandemic. As debt and bad loan levels increase, the banking sector might face challenges.

The report further noted that even as the monetary stimulus is expected to inject liquidity and stimulate demand for a wider section of the economy, the channelisation of funds from the financial institutions will be subjected to several constraints.

The foremost concern being increase in risk averseness, as the balance sheets of firms, households, and banks/NBFCs have weakened considerably and low demand for funds by firms as production activities have been on a standstill during the lockdown period, Singh said.

India has been under lockdown since March 25 to contain the spread of the coronavirus, resulting in supply disruptions and demand compression.

Prime Minister Narendra Modi imposed a nationwide lockdown to control the spread of coronavirus on March 25. It has been extended thrice, with some relaxations. The fourth phase of the lockdown is set to expire on May 31.