Anti-Sikh riot: SC to hear Sajjan's plea in May 2019

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 29: India’s economy expanded at its slowest pace in more than six years in the last three months of 2019, with analysts predicting further deceleration as the global Covid 19 coronavirus outbreak stifles growth in Asia’s third-largest economy.

The gross domestic product (GDP) data released yesterday showed government spending, private investment and exports slowing down, while there is a slight upturn in consumer spending and improvement in rural demand lent support.

The quarterly figure of 4.7% growth matched the consensus in a Reuters poll of analysts but was below a revised - and greatly increased - 5.1% rate for the previous quarter.

The central bank has warned that downside risks to global growth have increased as a result of the coronavirus epidemic, the full effects of which are still unfolding.

Prime minister Narendra Modi’s government has taken several steps to bolster economic growth, including a privatisation push and increased state spending, after cutting corporate tax rates last September.

In its annual budget presented this month, the government estimated that annual economic growth in the financial year to March 31 would be 5%, its lowest for last 11 years.

Modi’s government is targeting a slight recovery in growth to 6% for 2020/21, still far below the level needed to generate jobs for millions of young Indians entering the labour market each month.

The annual GDP figure for the September quarter was ramped up from an earlier estimate of 4.5%, while the April-June reading was similarly lifted to 5.6% from 5%, data released by the Ministry of Statistics showed on Friday.

Capital Investment Drop

In the December quarter, private investment grew 5.9%, up from 5.6% in the previous quarter, while government spending rose by 11.8%, against 13.2% in the previous three months.

However, corporate capital investment contracted by 5.2% after a 4.1% decline in the previous quarter, indicating that interest rate cuts by the central bank have failed to encourage new investment. Manufacturing, meanwhile, contracted by 0.2%.

“It appears growth slowdown is not just cyclical but more entrenched with consumption secularly joining the slowdown bandwagon even as the investment story continues to languish,” said Madhavi Arora of Edelweiss Securities in Mumbai.

Many economists said that the government stimulus could take four to six quarters of time before lifting the economy and the impact of those efforts could be outweighed by the global fallout from the coronavirus epidemic that began in China.

“The coronavirus remains the critical risk as India depends on China for both demand and supply of inputs,” said Abheek Barua, chief economist at HDFC Bank.

Indian shares sank on Friday for a sixth session running, capping their worst week in more than a decade. The NSE Nifty 50 index shed 7.3% over the week, while the Sensex dropped 6.8%, the worst weekly declines since the 2008-09 financial crisis.

Separately, India’s infrastructure output rose 2.2% year on year in January, data showed on Friday.

A spike in inflation to a more than 5-1/2 year high of 7.59% in January is expected to make the RBI hold off from further cuts to interest rates for now, while keeping its monetary stance accommodative.

New Delhi, Feb 11: People of Delhi have explained the true meaning of nationalism through their mandate, AAP's prominent face Manish Sisodia said as he clinched victory on the Patparganj seat.

Sisodia, who retained his seat for the third time, said the BJP indulged in "politics of hate", but people refused to be divided.

"I am happy to have won the Patparganj seat again. The BJP indulged in politics of hate, but I thank the people of Patparganj. Today, Delhi's people have chosen a government which works for them and explained the true meaning of nationalism through their mandate," he told reporters.

Sisodia, who was the Deputy Chief Minister and led the government's education reforms agenda, defeated BJP's Ravinder Singh Negi by a margin of over 3,500 votes.

The initial trends saw a seesaw battle between Sisodia and Negi.

In 2013, Sisodia had won by a margin of 11,000 votes and in 2015 by over 28,000 votes.