Supreme Court dismisses plea of sacked BSF jawan Tej Bahadur Yadav

New Delhi, Jun 20: After Prime Minister Narendra Modi said there are no foreign incursions into India, China has once again claimed that Galwan valley of Ladakh union territory is located on the Chinese side of the Line of Actual Control (LAC).

In an official statement on the step-by-step account of the Galwan face-off where 20 Indian soldiers were killed, China's foreign ministry spokesperson Zhao Lijian has said the Galwan valley is located on the Chinese side of the LAC in the west section of the China-India boundary.

"For many years, the Chinese border troops have been patrolling and on duty in this region," Zhao said alleging that since April this year, the Indian border troops have unilaterally and continuously built roads, bridges and other facilities at the LAC in the Galwan Valley.

China has lodged representations and protests on multiple occasions but India has gone even further to cross the LAC and make provocations, Zhao said.

By the early morning of May 6, the Indian border troops, who had crossed the LAC by night and trespassed into China's territory, built fortification and barricades, which impeded the patrol of Chinese border troops, Zhao said adding that they deliberately made provocations in an attempt to unilaterally change the status quo of control and management.

The Chinese border troops, he said, were "forced to take necessary measures to respond to the situation on the ground and strengthen management and control in the border areas."

In order to ease the situation, China and India have stayed in close communication through military and diplomatic channels, he said. "In response to the strong demand of the Chinese side, India agreed to withdraw the personnel who crossed the LAC and demolish the facilities, and so they did.

On June 6, the border troops of both countries held a commander-level meeting and reached consensus on easing the situation. The Indian side, he said, promised that they would not cross the estuary of the Galwan river to patrol and build facilities and the two sides would discuss and decide phased withdrawal of troops through the meetings between commanders on the ground.

"Shockingly, on the evening of June 15, India's front-line troops, in violation of the agreement reached at the commander-level meeting, once again crossed the Line of Actual Control for deliberate provocation when the situation in the Galwan Valley was already easing, and even violently attacked the Chinese officers and soldiers who went there for negotiation, thus triggering fierce physical conflicts and causing casualties."

"The adventurous acts of the Indian army have seriously undermined the stability of the border areas, threatened the lives of Chinese personnel, violated the agreements reached between the two countries on the border issue, and breached the basic norms governing international relations," the spokesperson said.

Beijing, he said, hopes that India will work with China, follow faithfully the important consensus reached between the two leaders, abide by the agreements reached between the two governments, and strengthen communication and coordination on properly managing the current situation through diplomatic and military channels, and jointly uphold peace and stability in the border areas.

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, May 20: With 5,611 new cases reported in the last 24 hours, India's COVID-19 tally reached 1,06,750 on Wednesday, according to the Union Ministry of Health and Family Welfare.

As many as 140 deaths have been reported in the last 24 hours, taking the total number of deaths to 3,303.

Out of the total cases, 61,149 are actives cases and 42,298 patients have been cured/discharged/migrated.

Maharashtra continues to remain the worst-affected state with 37,136 cases, followed by Tamil Nadu (12,448 cases), Gujarat (12,140 cases), and Delhi (10,554 cases).

The nationwide lockdown imposed as a precautionary measure to contain the spread of coronavirus has been extended till May 31.