Bahrain may ink pact with India for space tech cooperation

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, Jan 30: The Uttar Pradesh Special Task Force (STF) has arrested Dr Kafeel Khan from Mumbai airport for allegedly making inflammatory statements at AMU during protests against the Citizenship Amendments Act (CAA) last month, officials said.

Khan was arrested on Wednesday night with assistance from Mumbai Police at the airport when he arrived in the city to attend anti-CAA protests, an official said.

"Officials of the UP STF arrested Dr Kafeel Khan in a case which was registered at Civil Lines Police Station under section 153 A (promoting enmity between different groups) of IPC. Our police team helped our UP counterparts on their request," said an official from Mumbai Police.

He claimed that Khan had made inflammatory statements on December 12 last year during the protest near Bab e Syed Gate outside the Aligarh Muslim University in front of more than 600 students.

The official also alleged that the Gorakhpur doctor had made objectionable comments against Union Home Minister Amit Shah.

The FIR against Khan mentions that Swaraj India's president Yogendra Yadav was also present during the speech at AMU.

Following the arrest in the case, Khan was taken to the Sahar Police Station and after completing formalities he will be taken to UP on transit remand, the official said.

Khan, a paediatrician, had come to the limelight in 2017 when a controversy broke out after the death of over 60 children in less than a week at the BRD Medical College in Gorakhpur, UP.

Dubai, Jul 14: The UAE-based parents of children under 12 stranded in India are in a tight spot with multiple airlines refusing to accept unaccompanied minors.

Starting July 12, Indians wanting to return to the UAE have been given a 15-day window to travel back on the condition that they have valid residency permits. They also have to produce a negative Covid-19 test result.

But parents of minors said they are feeling helpless as children are unable to avail of the travel opportunity despite having return permits.

"It has been more than three months since my daughter has been stuck in India. We have GDRFA approval for her but the airlines are not accepting her booking, saying she is under 12," Poonam Sapre, a Dubai-based mother, told Khaleej Times.

Her daughter Eva Sapre, 10, is in Hyderabad and is awaiting a reunion with her parents.

"She is just 10 and it has already taken an emotional toll on her. She is eager to come back and is asking me every day about her return. This is so frustrating."

Barring Emirates and Etihad, other airlines including flydubai, Air Arabia and Air India Express are not accepting unaccompanied minors. With India extending the travel freeze till July 31, normal flights are yet to resume and only special flights are allowed between India and UAE under a bilateral agreement.

Sapre said only flydubai is flying the Hyderabad-Dubai route, and the carrier has restrictions on minors travelling alone. "My daughter is too young to fly through indirect routes," claims the mother.

When Khaleej Times reached out to the airlines for comment, they confirmed that such rules on unaccompanied minors were already in place even before Covid-19 travel restrictions came into effect.

Another Dubai-based distressed parent, who did not want to be named, said her eight-year-old son is in Kerala and is unable to fly due to airline policies on unaccompanied minors.

"I called up Air India Express and they said this has been their rule even before the Covid-19 outbreak. I am appealing to them to re-consider and make an exception during these trying times so that our children can come home safely," she said.

Faced with this eventuality, some parents are forced to fly out of the UAE so they can accompany their children on the flight back home.

An Indian mother, who is currently in Mumbai, said she flew out of Dubai on Monday morning solely for the purpose of bringing back her twin daughters, aged 10.

"I had no choice. Ideally, they could have travelled together, but under these circumstances I thought it best to get them with me personally," said the mother.