Kerala will continue to eat beef; BJP has no problem with it: Modi govt’s minister

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, Jan 25: The latest edition of the Oxford Advanced Learner's Dictionary features 26 new Indian English words, including Aadhaar, chawl, dabba, hartal and shaadi.

The 10th edition of the dictionary, which was launched on Friday, has 384 Indian English words and incorporates over 1,000 new words such as chatbot, fake news and microplastic.

The dictionary focuses on language change and its evolution through the years, and has ensured that the language and examples used in the new edition are relevant and up to date with the times, Oxford University Press (OUP) said.

The new edition comes with interactive online support through the Oxford Learner's Dictionaries website and an app. The website includes advanced features such as audio-video tutorials, video walkthroughs, self-study activities and enhanced iWriter and iSpeaker tools.

"This edition has 26 new Indian English words of which 22 figure in the printed dictionary. The other four are in the digital version," said Fathima Dada, Managing Director (Education Division) at OUP.

Some of other new Indian words in the dictionary are auntie (while aunty already figures in the English dictionary, auntie is an Indianism), bus stand, deemed university, FIR, non-veg, redressal, tempo, tube light, veg and videograph.

The four new Indian English words in the online version of the dictionary are current (for electricity), looter, looting and upazila (one of the areas that a district is divided into for administration purposes).

According to OUP, the new edition provides better, more accurate and understandable definitions with examples, usage notes and additional resources to help the learner use the right word in the right context.

"Prevalence and common usage are the main criteria for enlisting new words. We scan the globe for words which are often used by people while speaking English. Then these words go through a rigorous testing process," Dada said.

"As OUP is the custodian of English language globally, these words have to go through its processes," she told PTI.

The Oxford Advanced Learner's Dictionary, she said, has been reinventing itself for nearly eight decades, anticipating the growing learning requirements of learners.

"The 10th edition also is equipped with a strong digital support system, including an app," she said.

It is equipped with several digital tools. With iSpeaker, learners can get help preparing for speaking exams and presentations. With iWriter, learners can plan, write and review their written work. Text Checker allows the teacher to check any text against the Oxford 3000, 5000, and OPAL (Oxford Phrasal Academic Lexicon) written word list.

Resources accessible through online premium access include lesson plans, worksheets, video walkthroughs, and classroom and self-study activities. With the OALD app one can find 86,000 words, 95,000 phrases, 112,000 meanings and 237,000 examples.

The dictionary, which spans 77 years, was originally published in Japan in 1942 and was first brought out by OUP in 1948. The learner's dictionary is based on the original values of its creator, Albert Sydney Hornby, whose aim was to help language learners worldwide understand the meaning of English words.

Bengaluru, Mar 23: Karnataka Health Minister B Sriramalu on Monday confirmed that there are 27 positive coronavirus cases in the state so far.

A fresh COVID-19 positive case has been reported from Mysore today.

"One hospital in every district is dedicated to COVID-19 treatment. We have placed an order for 1000 ventilators. We have also ordered 10 lakh N90 mask, five lakh PPE testing kits, 15 lakh three-layer masks. Sanitizers and thermal scanners will also be purchased on-demand," said Sriramalu while addressing a press conference here.

The Karnataka Health Minister said that decision will also be taken to purchase lab testing kits and equipment.

Meanwhile, Dr Ashwath Marayan, Deputy Chief Minister, Karnataka said that all necessary measures are being taken to contain the spread of COVID-19.

"We will take important decisions as soon as possible. 80 per cent of the companies are following work from home. Critical and essential things should be provided in this situation and we have kept them available to serve the people," said Marayan.

"We have taken all the required decisions including the logistics and supply. Social distancing is much important and we will implement it," he added.

The total number of positive coronavirus cases in the country mounts at 415, according to the Indian Council of Medical Research (ICMR).