74% of northeast monsoon rains in 8 days sinks Chennai, kills 12

New Delhi, Jan 7: A fringe right-wing group calling itself the Hindu Raksha Dal has purportedly taken responsibility for the attack on students of Jawaharlal Nehru University (JNU) in a video posted on social media.

The video, which was posted on social media on Monday and has gone viral since then, shows a man identifying himself as Pinki Chaudhary saying that those who resort  to “anti-national activities” will be treated in the same way that JNU students and faculty were.

He later told news channels that others involved in "anti-national activities" would face similar attacks.

There was no immediate reaction from the police on Chaudhury's claims.

“For several years, JNU has been a bastion of communists and we will not tolerate it. Hindu Raksha Dal, Bhupendra Tomar, Pinki Chaudhury take the responsibility of what has happened in JNU...all of them were our volunteers. Those who cannot do such work for Mother India don't have the right to live in this country,” Chaudhary is seen saying in the video.

“We are always ready to sacrifice our lives for Mother India. We will not tolerate anyone who speaks against the religion,” he added.

Efforts to reach the man were unsuccessful: his phone was switched off.

More than 35 students were injured Sunday when a masked mob went on the rampage, attacking students and professors and vandalising property. The JNUSU has accused the RSS-affiliated ABVP volunteers of attacking the students.

New Delhi, Jan 30: In a major shift of strategy ahead of the Delhi assembly polls, the Bharatiya Janata Party (BJP) has decided to rope in its senior leaders for massive public rallies.

Its star campaigners like Prime Minister Narendra Modi, Union Home Minister Amit Shah, BJP chief JP Nadda, Uttar Pradesh Chief Minister Yogi Adityanath, and other union ministers would now be addressing massive public rallies in addition to ongoing neighbourhood meetings.

"The big rallies would begin from February 1. While 'Nukkad' meetings will take place till the last day of campaigning, there would be big rallies of the top leadership of the party, " informed a senior party leader.

Sources said the BJP has changed its strategy after the success of its grassroots contact programme as the party wants to consolidate its gains.

"As part of the reworked strategy the BJP has asked its various Mandals to organise public meetings of 10,000-15,000 people in each assembly segment to reach out to the masses," sources added.

While there are two planned for Prime Minister Modi, two have been planned for JDU chief and Bihar Chief Minister Nitish Kumar along with Nadda and Amit Shah. Yogi Aadityanath too would be addressing 12 rallies.

The party is leaving no stone unturned to secure massive gains, which it feels can be converted to victory in the forthcoming polls.

Party sources feel that the relentless campaigning under the guidance of Amit Shah and Nadda has ensured that the morale of party cadre is at an all-time high.

"The neighbourhood meetings have ensured that we have been able to make the people of Delhi aware of the lack of work under the Arvind Kejriwal led Aam Aadmi Party government. They have also been apprised about the anti-national views of the opponents and we think that this is expected to turn the polls into our favour," sources added.

Delhi is scheduled for assembly polls on February 8 and the results for the 70 constituencies will be declared on February 11.

As part of the new strategy, senior leaders like JP Nadda, Amit Shah, Uttar Pradesh chief minister Yogi Adityanath, ministers like Rajnath Singh and Smriti Irani would be holding public rallies in various parts of the city. Several other chief ministers from various BJP ruled states are also expected to be roped in for the campaign.

The strategy for reach out to the masses is an attempt at weakening the hold of AAP on Delhi. With positive feedback coming after the success of the neighbourhood meetings in the past week, the BJP is now looking to increase its potential reach with polls just days away.

Till now the party had deployed 70 union ministers to hold at least one public meeting and one 'padayatra' each as part of the campaign.

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.