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New Delhi, Jan 1: On the New Year's eve, the railways announced fare hike across its network effective from January 1, 2020, according to an order issued on Tuesday.

While suburban fares remain unchanged, ordinary non-AC, non-suburban fares were increased by 1 paise per km of journey.

The railways also announced a two paise/km hike in fares of mail/express non-AC trains and four paise/km hike in the fares of AC classes.

The fare hike is also applicable to premium trains such as Shatabdi, Rajdhani and Duronto, according to the order.

In the Delhi-Kolkata Rajdhani, which covers a distance of 1,447 km, the hike at the rate of 4 paise per km will be around Rs 58.

According to the order, there will not be any change in the reservation fee and superfast charge and the hike in fares will not be applicable to tickets already booked.

The last such hike was announced in 2014-2015 when fares of all classes of trains were raised by 14.2 per cent and freight charges by 6.5 per cent. However, since then, the railways introduced the flexi-fare scheme which significantly raised fares on select trains and launched trains like Vande Bharat Express and Tejas Express which have relatively higher fares. Trains with dynamic pricing like Suvidha Express were also introduced.

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.

Kolkata, May 21: Around 300 nurses have left Kolkata for Manipur after resigning from their jobs, said JS Joyrita, Deputy Residence Commissioner, Manipur Bhavan, Kolkata on Wednesday.

"Around 60 more nurses will be leaving tomorrow. We are getting many calls from people who want to go back to Manipur," she said.

Earlier, it was reported that 185 nurses have quit their job from hospitals in Kolkata and returned to Imphal. Cristella, a nurse said: "We are not happy that we left our duties. But we faced discrimination, racism and people sometimes spit on us. Lack of PPE kits, and people used to question us everywhere we went."

According to the latest information available on the website of the Ministry of Health and Family Welfare, 2961 cases of the virus have been reported from West Bengal 1074 cured/migrated/discharged and 250 deaths.

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.