Chidambaram spends a quiet night at CBI headquarters

Miami, Mar 12: The NBA has suspended its season "until further notice" after a Utah Jazz player tested positive Wednesday for the coronavirus, a move that came only hours after the majority of the league's owners were leaning toward playing games without fans in arenas.

Now there will be no games at all, at least for the time being. A person with knowledge of the situation said the Jazz player who tested positive was center Rudy Gobert. The person spoke to The Associated Press on condition of anonymity because neither the league nor the team confirmed the test.

"The NBA is suspending game play following the conclusion of tonight's schedule of games until further notice,'' the league said in a statement sent shortly after 9:30 p.m. EDT. "The NBA will use this hiatus to determine next steps for moving forward in regard to the coronavirus pandemic.''

The test result, the NBA said, was reported shortly before the scheduled tip-off time for the Utah at Oklahoma City game on Wednesday night was called off. Players were on the floor for warmups and tip-off was moments away when they were told to return to their locker rooms. About 30 minutes later, fans were told the game was postponed ``due to unforeseen circumstances."

Shutdown for two weeks?

Those circumstances were the league's worst-case scenario for now -- a player testing positive. A second person who spoke to AP on condition of anonymity said the league expects the shutdown to last a minimum of two weeks, but cautioned that time-frame is very fluid.

"It's a very serious time right now," Miami Heat coach Erik Spoelstra said. "I think the league moved appropriately and prudently and we'll all just have to monitor the situation and see where it goes from here."

The Jazz released a statement saying a player -- they did not identify Gobert -- tested negative earlier Wednesday for flu, strep throat and an upper respiratory infection. That player's symptoms diminished as the day went along, but the decision was made to test for COVID-19 anyway. That test came back with a preliminary positive result.

"The individual is currently in the care of health officials in Oklahoma City," the Jazz said, adding that updates would come as appropriate.

Jaipur, July 13: Amid a deepening political crisis in Rajasthan where the number 2 leader of the Congress party Sachin Pilot has revolted, over 200 Income Tax (I-T) sleuths raided the residences and properties of two of Chief Minister Ashok Gehlot’s close confidants.

The Income Tax department has carried out searches at over a dozen locations linked to Congress leader Dharamender Rathore as well as jewellery firm owner Rajiv Arora, both of whom are considered close to Gehlot.

Officials said that the raids that are underway in Jaipur, Kota, Delhi, and Mumbai were done after a complaint of tax evasion was made. Under the scanner, they said, are transactions that were made outside the country.

The curious timing of the Income Tax department’s action against Gehlot’s aides has made the Congress accuse the sleuths of acting on the behest of the BJP.

Congress spokesperson Randeep Singh Surjewala tweeted: “After all, BJP's lawyers came on the field. The Income Tax Department started raids in Jaipur. When will ED arrive?”

The Congress is facing a cliffhanger in Rajasthan after the open rebellion by deputy chief minister Sachin Pilot, who on Sunday night claimed that he had the support of 30 MLAs and that Gehlot was leading a minority government in the state.

However, Congress leader Avinash Pande on Monday said 109 MLAs have signed a letter of support to the chief minister, well above the majority mark of 100. The party has issued a whip to all the MLAs, asking them to attend the Congress Legislature Party meeting at 10.30 am. 

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.