Six feet distancing not enough to stop coronavirus transmission in light winds: Study

News Network
May 20, 2020

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.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
April 23,2024

Nationalcommision.jpg

The Karnataka government's decision to categorise the entire Muslim community as a backward caste for reservation purposes in the state has drawn criticism from the National Commission for Backward Classes (NCBC), which said such blanket categorisation undermines the principles of social justice.

According to the data submitted by the Karnataka Backward Classes Welfare Department, all castes and communities within the Muslim religion have been enlisted as socially and educationally backward classes under Category IIB in the State List of Backward Classes.

The NCBC, during a field visit last year, examined the state's reservation policy for OBCs in educational institutions and government jobs.

"All castes/communities of Muslim religion of Karnataka are being treated as socially and educationally backward classes of citizens and listed as Muslim Caste separately under Category IIB in the State List of Backward Classes for providing them reservation in admission into educational institutions and in appointments to posts and vacancies in the services of the State for the purpose of Articles 15(4) and 16(4) of the Constitution of India," the NCBC said in a statement on Monday night.

This categorisation has led to the provision of reservation benefits for 17 socially and educationally backward castes under Category I and 19 castes under Category II-A, respectively.

The NCBC said the blanket categorisation of Muslims as a backward caste undermines the principles of social justice, particularly for the marginalised Muslim castes and communities identified as socially and educationally backward.

However, the NCBC emphasised that while there are indeed underprivileged and historically marginalised sections within the Muslim community, treating the entire religion as backward overlooks the diversity and complexities within Muslim society.

"The religion-based reservation affects and works against ethics of social justice for categorically downtrodden Muslim castes/communities and identified socially and educationally backward Muslim castes/communities under Category-I (17 Muslim castes) and Category II-A (19 Muslim castes) of State List of Backward Classes. Hence, socially and educationally backward castes/communities cannot be treated at par with an entire religion," the NCBC stated.

The NCBC also voiced concern over the impact of such reservations on the overall framework of social justice, particularly in the context of local body polls.

While Karnataka provides 32 per cent reservation to backward classes in local body elections, including Muslims, the Commission stressed the need for a nuanced approach that accounts for the diversity within these communities.

According to the 2011 Census, Muslims constitute 12.92 per cent of the population in Karnataka.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
April 20,2024

AK.jpg

New Delhi: The Aam Aadmi Party on Saturday alleged that Delhi Chief Minister Arvind Kejriwal is being pushed towards a “slow death” inside Tihar jail by denying him insulin and consultations with his doctor.

Kejriwal, who has Type-2 diabetes, has been asking for insulin and a video conferencing with his family doctor but his requests are being denied by the jail administration, party spokesperson Saurabh Bharadwaj said in a press conference.

"I want to say with full responsibility that a conspiracy is underway for the slow death of Kejriwal," Bharadwaj claimed citing blood sugar readings of the Chief Minister in jail.

He also slammed the Tihar administration, BJP, Centre and Delhi LG for allegedly denying insulin to Kejriwal and said the Delhi Chief Minister had been suffering from diabetes for the last 20-22 years.

On Friday, the chief minister council Senior advocate Abhishek Singhvi said Kejriwal has not been administered insulin to control his sugar levels since his arrest, terming it “shocking” and “alarming”.

The ED had on Thursday claimed before the court that Kejriwal was eating food high in sugar like mangoes and sweets every day, despite having Type-2 diabetes, to create grounds for medical bail.

Kejriwal, however, refuted the ED’s claims by asserting before a court that the food he consumed was in conformity with the diet chart prepared by his doctor.

“Out of 48 meals sent from home, only three times mangoes were there…,” Singhvi told the court.

Bharadwaj said Kejriwal was allowed by the court to use a machine in the jail to monitor his daily blood sugar levels.

"Overall, it was a conspiracy to finish Kejriwal so his multiple organ damage and when he comes out of jail after 2-4 months he goes for treatment of kidney, heart and other organs," said Bharadwaj, who holds the portfolio of health in Delhi government.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
April 14,2024

indiancanda.jpg

New Delhi: A 24-year-old student from India was shot dead inside a car in Canada's South Vancouver, the local police have said. The Vancouver Police in a statement said Chirag Antil, 24, was found dead inside a vehicle in the area after neighbours reported hearing gunshots.

"Officers were called to East 55th Avenue and Main Street around 11 pm on April 12 after residents heard the sound of gunshots. Chirag Antil, 24, was found deceased inside a vehicle in the area. No arrests have been made, and the investigation remains ongoing," the police said.

Chirag Antil's brother Ronit told reporters that Chirag seemed happy when they spoke on the phone in morning. Chirag later took out his Audi to go somewhere. That was when he was shot dead.

The Congress students' wing National Students' Union of India chief Varun Choudhary in a post on X tagging the Ministry of External Affairs requested for assistance to the student's family.

"Urgent attention regarding the murder of Chirag Antil, an Indian student in Vancouver, Canada. We urge the Ministry of External Affairs to closely monitor the progress of the investigation and ensure that justice is swiftly served," Mr Choudhary said.

"Additionally, we request the ministry to extend all necessary support and assistance to the family of the deceased during this difficult time," he said.

Chirag Antil's family is raising money through the crowdfunding platform GoFundMe to repatriate his body to India, local media reported.

Haryana resident Romit Antil, the brother of Chirag Antil, told CityNews that he was a kind-hearted person.

"My brother and I had a great relationship. We used to talk every day, day and night. I spoke to him last before the accident happened. He was kind of happy, he never had any issues or fights with anyone, ever. He was an extremely polite person," Romit Antil told CityNews.

Chirag Antil came to Vancouver in September 2022. He just finished MBA at University Canada West, and recently got his work permit.

Here are 5 facts about Chirag Antil

1.    Chirag Antil was a resident of Sonipat, Haryana.
2.    He was the youngest son of Mahavir Antil, a retired employee of the Sugar Mill Department of the Haryana Government.
3.    Chirag moved to Vancouver in 2022 to pursue higher studies at the University Canada West (UCW), in British Columbia.
4.    After completing his MBA, he started working at a company in Canada after getting a work permit.
5.    Chirag's brother Ronit shared in an interview that his younger sibling was a "kind-hearted" person. "I spoke to him last before the accident happened," he said and added that Chirag sounded "happy".

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.