SC dismisses BJP leader’s PIL challenging minority status of Muslims, 4 other communities

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.

Jun 23: The U.S. government on Monday restricted charter flights from India, accusing the nation of "unfair and discriminatory practices" by violating a treaty governing aviation between the two countries.

Air India Ltd. has been making flights to repatriate its citizens during the travel disruptions caused by the Covid-19 outbreak, but also has been selling tickets to the public, the Transportation Department alleged.

At the same time, U.S. airlines have been prohibited from flying to India by aviation regulators there, the DOT said in its order. The situation "creates a competitive disadvantage for U.S. carriers," the agency said in a press release.

Air India is advertising a schedule that is more than half of pre-virus operations, the department said. "The charters go beyond true repatriations, and it appears that Air India may be using repatriation charters as a way of circumventing" that nation's flight restrictions, the U.S. agency said.

The order becomes effective in 30 days, the department said.

Indian airlines must apply to the DOT for authorization before conducting charter flights so that it can scrutinize them more closely, it said. The department will reconsider the restrictions once India lifts restrictions on U.S. carriers.

The action against India follows weeks of DOT restrictions against Chinese airlines after the U.S. agency accused that nation of unfairly banning American carriers in the wake of the virus. On June 15, the U.S. announced it would agree to allow four flights a week from China after it allowed the same number by U.S. carriers.

Attempts to reach Air India and the Indian embassy in Washington after business hours were unsuccessful.

Jan 21: Indian policymakers may make it easier for companies to tap foreign funding, as a prolonged cash squeeze makes it tough for firms to borrow at home.

Investors are speculating about potential steps Finance Minister Nirmala Sitharaman could unveil when she presents the nation’s budget on Feb. 1. These measures may include freeing up firms to borrow at higher rates and offering tax breaks to global funds.

“The government will need to relax local rules to make it easier for Indian companies to raise debt overseas and tide over the funding crunch in the onshore market,” said Raj Kothari, London-based head of trading at Jay Capital Ltd. “At the same time, they need to ensure that the borrowers tapping offshore markets abide with stricter corporate governance so as to avoid further defaults.”

A prolonged crisis in India’s shadow bank sector and a pile of bad loans at traditional lenders is making it expensive for Indian companies, other than the best-rated firms, to access funding. The government has tried a series of measures to spur domestic credit, including providing so-called credit enhancement and allowing tiny firms to restructure debt.

Here are some steps Sitharaman may consider to spur foreign borrowing:

• She could raise the cap of 450 basis points above Libor, which limits overall foreign debt costs for Indian companies

• This could help lower-rated firms sell bonds abroad. Indian companies rated BBB currently borrow at more than 10%, about 3.8 percentage points more than their top-rated peers;

• Sitharaman could waive the withholding tax foreign investors need to pay on holdings of rupee-denominated debt sold by Indian companies abroad

• The waiver was offered between September 2018 to March 2019, but wasn’t extended as the highest global interest rates since the financial crisis deterred Indian borrowers. Since then, the three-month Libor has dropped by about 1 percentage point

• She could permit Indian property developers and housing finance lenders to sell overseas bonds for reasons beyond affordable housing projects

• New funding lines to the real estate sector, arguably ground zero of India’s economic slowdown, could help kickstart consumption and investment as the industry is the nation’s biggest job-creator.