Accept Rs 700-cr from UAE or compensate us: Flood-ravaged Kerala tells Modi govt

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.

Indore, Jul 24: A woman who sells fruits on a cart and who lashed out at municipal officials here has done PhD in Materials Science. Her siblings too are well educated and sell fruits as they did not find jobs.

Dr Raisa Ansari, who lives at Bakery Street in Pardeshipura with her family said she wanted to be a scientist but did not get a job anywhere.

Speaking to media persons, Raisa said, "I have done PhD in Materials Science and wanted to be a scientist but did not get job anywhere. I sell fruit here but the municipal officials are bothering us. We are being forced to move from here to there like cattle. Our religion may be the reason why we are not getting jobs but we are proud to be Indian. I am still looking for a job."

Dr Raisa's mother Ayesha Ansari said she herself is not educated, but has four children of whom three girls and one boy studied a lot but no one got job.

Speaking to media persons Ayesha said, "I have four children and they are well educated. I have not studied but all my children are educated but did not get job so all of them sell fruits."

"When the matter came to marriage, one of the daughters got married. Raisa and Shahjahan Bi wanted an educated boy, but they were not able to find a suitable match because of their complexion and sometimes they rejected the proposal because of dowry, so both are single. Two of my grandchildren are studying biology. They will become doctors," said Ayesha.

Meanwhile, people in the neighbourhood lauded the family's abilities. They said theirs was an educated family had to sell fruits as they did not get jobs.

New Delhi, Mar 19: Hit hard by coronavirus, budget carrier IndiGo today announced that it will cut salaries of senior employees. IndiGo CEO Ronojoy Dutta, who will himself take a 25% cut in salary, said senior vice presidents and above are taking a 20% pay cut while vice presidents and cockpit crew are taking a 15% pay cut.

With precipitous drop in revenues, the very survival of airline industry is now at stake, Dutta said while announcing the pay cut. "We have to pay careful attention to our cash flow so that we do not run out of cash," Dutta said adding that he knew how hard it was for families to take a cut in "take-home pay".

"With a great deal of reluctance and a deep sense of regret, we are therefore instituting pay cuts for all employees, excluding Bands A and B, starting April 1, 2020," the chief executive officer said. Band A and B are the lowest brackets in salary class, where most of the employees are.

IndiGo's flight operations chief Ashim Mitra had written an email to pilots this morning saying that the economic environment has deteriorated significantly and no airline is insulated from this severe downturn.

"It has become a necessity to initiate some tough calls and we are working on a string of measures that will be shared and implemented over the next few days and weeks," Mitra said.

With countries sealing their borders partially or fully across the world due to the novel coronavirus pandemic, aviation sector has been hit extremely hard as most airlines globally have drastically curtailed their flight operations.

Another budget airline GoAir has already terminated contracts of expat pilots amid curtailed operations due to the coronavirus pandemic.

Citing "unprecedented" decline in air travel, the budget carrier announced it was suspending international operations and offering leave without pay programme to its staff on a rotational basis.

Government-owned Air India may also cut salary of employees by 5% amid its growing financial woes particularly in the wake of the coronavirus pandemic, which has nearly grounded its entire international operations. The reduction will be across the board, according to a PTI report.

The loss-making airline, which is in the process of a second attempt of privatization after failing to get a single buyer nearly two years ago, has already taken some steps such as reduced flying allowances to cabin crew besides withdrawing entertainment allowance to executive pilots, among others.

“Air India is considering a 5 per cent pay cut to its employees as it faces huge financial crisis due to the ongoing coronavirus outbreak, which has brought almost its entire international operations save the US, Canada and a few other markets, to the ground," a source told news agency.