This Ganesh idol decorated with 70 kg gold, 350 kg silver; mandal insured for Rs 264.75 cr

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.

Dubai/Washington, Jan 6: Tens of thousands of Iranians thronged the streets of Tehran on Monday for the funeral of Quds Force commander Qassim Suleimani who was killed in a US air strike last week and his daughter said his death would bring a "dark day" for the United States.

"Crazy Trump, don't think that everything is over with my father's martyrdom," Zeinab Suleimani said in her address broadcast on state television after US President Donald Trump ordered Friday's strike that killed the top Iranian general.

Iran has promised to avenge the killing of Qassim Suleimani, the architect of Iran's drive to extend its influence across the region and a national hero among many Iranians, even many of those who did not consider themselves devoted supporters of the Islamic Republic's clerical rulers.

The scale of the crowds in Tehran shown on television mirrored the masses that gathered in 1989 for the funeral of the founder of the Islamic Republic, Ayatollah Ruhollah Khomeini.

In response to Iran's warnings, Trump has threatened to hit 52 Iranian sites, including cultural targets, if Tehran attacks Americans or US assets, deepening a crisis that has heightened fears of a major Middle East conflagration.

The coffins of the Iranian general and Iraqi militia leader Abu Mahdi al-Muhandis, who was also killed in Friday's attack on Baghdad airport, were passed across the heads of mourners massed in central Tehran, many of them chanting "Death to America".

One of the Islamic Republic's major regional goals, namely to drive US forces out of neighbouring Iraq, came a step closer on Sunday when the Iraqi parliament backed a recommendation by the prime minister for all foreign troops to be ordered out.

"Despite the internal and external difficulties that we might face, it remains best for Iraq on principle and practically," said Iraqi caretaker Prime Minister Adel Abdul Mahdi, who resigned in November amid anti-government protests.

Iraq's rival Shi'ite leaders, including ones opposed to Iranian influence, have united since Friday's attack in calling for the expulsion of US troops.

Esmail Qaani, the new head of the Quds Force, the Revolutionary Guards' unit in charge of activities abroad, said Iran would continue Suleimani's path and said "the only compensation for us would be to remove America from the region."

ALLIES AT FUNERAL

Prayers at Suleimani's funeral in Tehran, which will later move to his southern home city of Kerman, were led by Iran's Supreme Leader Ayatollah Ali Khamenei. Suleimani was widely seen as the second most powerful figure in Iran behind Khamenei.

The funeral was attended by some of Iran's allies in the region, including Ismail Haniyeh, the leader of Palestinian group Hamas who said: "I declare that the martyred commander Suleimani is a martyr of Jerusalem."

Adding to tensions, Iran said it was taking another step back from commitments under a 2015 nuclear deal with six major powers, a pact from which the United States withdrew in 2018.

Washington has since imposed tough sanctions on Iran, describing its policy as "maximum pressure" and saying it wanted to drive down Iranian oil exports - the main source of government revenues - to zero.

Talking to reporters aboard Air Force One on the way to Washington from Florida on Sunday, Trump stood by his remarks to include cultural sites on his list of potential targets, despite drawing criticism from US politicians.

"They're allowed to kill our people. They're allowed to torture and maim our people. They're allowed to use roadside bombs and blow up our people. And we're not allowed to touch their cultural sites? It doesn't work that way," Trump said.

Democratic critics of the Republican president have said Trump was reckless in authorizing the strike, and some said his comments about targeting cultural sites amounted to threats to commit war crimes. Many asked why Soleimani, long seen as a threat by US authorities, had to be killed now.

Republicans in the US Congress have generally backed Trump's move.

Trump also threatened sanctions against Iraq and said that if US troops were required to leave the country, Iraq's government would have to pay Washington for the cost of a "very extraordinarily expensive" air base there.

He said if Iraq asked US forces to leave on an unfriendly basis, "we will charge them sanctions like they've never seen before ever. It'll make Iranian sanctions look somewhat tame."

Jan 6: India’s Finance Ministry has delivered a challenge to its revenue collectors: meet tax targets despite $20 billion of corporate tax cuts.

Through a video conference on Dec. 16, officials were exhorted to meet the direct tax mop-up target of 13.4 trillion rupees ($187 billion), a government official told reporters. Collection in the eight months to November grew at 5% from a year earlier, against the desired 17%.

The missive shows Prime Minister Narendra Modi’s urgent need to buoy public finances in a slowing economy where April-November tax collections were half the amount budgeted. Authorities withheld some payments to states and have capped ministries’ expenditure as the fiscal deficit ballooned beyond the target.

The government’s efforts to maintain its deficit goal goes against advice from some quarters, including central bank Governor Shaktikanta Das, who urged more spending to spur economic growth.

It’s uncertain though how much room Modi’s administration has to boost expenditure, given that it may already be borrowing as much as 540 billion rupees through state-run companies, a figure that isn’t reflected on the federal balance sheet. Uncertainty about public finances pushed up sovereign yields in November and December, compelling Das to announce unconventional policies to keep costs in check.

“This is not a time to conceal the fiscal deficit by off-budget borrowing or deferring payments,” said Indira Rajaraman, an economist and a former member of the Reserve Bank of India’s board. “If they were to stick to the target, that would be catastrophic because there is so much pump-priming that is needed right now.”

GDP grew 4.5% in the quarter ended September, the slowest pace in more than six years as both consumption and investments cooled in Asia’s third-largest economy. Only government spending supported the expansion, piling pressure on Modi to keep stimulating.

S&P Global Ratings warned in December it may downgrade India’s sovereign ratings if economic growth doesn’t recover. Government support seems to be waning now, with ministries asked to cap spending in the final quarter of the financial year at 25% of the amount budgeted rather than 33% allowed earlier. This new rule will hamstring sectors including agriculture, aviation and coal, where not even half of annual targets have been disbursed.

As the federal government runs short of money, it’s been delaying payouts to state administrations.

Private hospitals have threatened to suspend cash-less services to government employees over non-payment of dues, while a builder informed the stock exchange about delayed rental payments from no less than the tax office itself.

India is considering a litigation-settlement plan that will allow companies to exit lingering tax disputes by paying a portion of the money demanded by the government, the Economic Times newspaper reported Saturday.

The move will help improve the ease of doing business besides unlocking a part of the almost 8 trillion rupees ($111 billion) caught up in these disputes. The step, which is being considered as part of the annual budget, could also bridge India’s fiscal gap.

Finance Minister Nirmala Sitharaman has refused to comment on the deficit goal before the official budget presentation due Feb. 1.

A deviation from target, if any, “will need to be balanced with a credible consolidation plan further-out,” said Radhika Rao, an economist at DBS Group Holdings Ltd. in Singapore.