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Mumbai, Jan 3: The Shiv Sena on Friday targeted the Centre by questioning the "efficacy" of the 2016 surgical strike and said the perception that it would demoralise Pakistani terrorists remained an "illusion" as Indian soldiers continue to get killed in terror attacks in Kashmir.

Accusing the Modi government of boasting about how Pakistan was straightened out after the surgical strike, the Sena sought to know whether it has really happened.

It also observed that troubled borders were not good for the country's well-being.

The Sena's remarks come in the wake of the death of an Army soldier from Maharashtra, Naik Sandip Raghunath Sawant, who was killed during a counter-insurgency operation in Jammu and Kashmir on Wednesday.

"The New Year did not begin on a positive note in Kashmir. Our jawan from Satara, Sandip Sawant, attained martyrdom in Kashmir along with two other soldiers. In the last one month, seven to eight jawans from Maharashtra were killed in the line of duty. The Maha Vikas Aghadi government in Maharashtra is not responsible for this," the Sena said in an editorial in party mouthpiece 'Saamana'.

The party also questioned whether the situation in Kashmir has improved after the surgical strike and abrogation of Article 370 provisions.

The party, however, maintained that scrapping Article 370 was a good move.

India had conducted the surgical strike on September 29, 2016, across the Line of Control (LoC) as a response to a terrorist attack on an Indian Army base in Uri sector of Jammu and Kashmir earlier that month.

Without naming the Centre, the Sena alleged, "Circulating news that only the Pakistanis were getting killed in Kashmir will not change the reality as tricolour-draped bodies of Indian soldiers, like Sawant, are reaching their respective villages."

"There is a bloodshed along the Kashmir border and mounting anger among the families of martyred jawans. The perception that surgical strike will demoralise Pakistani terrorists has turned out to be an illusion. In fact, the (terror) attacks have increased," it added.

The Uddhav Thackeray-led party accused the ruling BJP of boasting about straightening out Pakistan after the surgical strike.

"But has Pakistan been really straightened out? Rather Pakistan has been indulging in ceasefire violations along the LoC every day," it added.

The Shiv Sena also questioned the government's claim that the situation in Kashmir was under control after the nullification of Article 370.

"It is good that Article 370 was scrapped. Before that, surgical strike was carried out in Pakistan. But has the situation in Kashmir improved? The terror attacks continue. It's only that there is a control in reporting (these incidents)," it said.

The Sena also alleged that there was no clarity as to what was transpiring in Kashmir after the scrapping of Article 370 and only the media reports of soldiers sacrificing their lives have been coming out from that state

In a veiled attack on the BJP, its erstwhile ally, the Sena, also accused it of exploiting the surgical strike for political gains.

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.