APD to monitor air quality in Mangaluru during Diwali

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

Bengaluru, Jan 7: Slogans of ‘Inquilab Zindabad’ rent the air at Town Hall on Monday evening as thousands of students, social activists, lawyers, doctors and theatrepersons among others staged a protest to denounce Sunday’s attack on the students and faculty of New Delhi’s Jawaharlal Nehru University (JNU).

“This is unacceptable. As students living in hostels, we are now worried about our safety,” said Prakruthi Kishore, a student of National Law School of India University (NLSIU), Bengaluru.

Rishi Kumar, a student of Indian Institute of Science, pitched in. “JNU is an extremely protected university located in the national capital. It’s surprising that such an incident occurred amid tight security.”

Delhi police and the government need to wake up and take stringent action against the goons, Kumar said, adding: “Students can’t be treated like puppets. The government needs to act immediately.”

“The government is behaving shamelessly by sending goons to threaten students and professors of JNU,” said Alokanath Pandit, a lawyer.

With “Zor se bolo-azadi, tum din me maaro-azadi, hum raat me ayenge-azadi,” drowning the cacophony of traffic at the intersection, the sloganeering reached a crescendo around 6pm as the protesters raised their hands in a show of solidarity with the beleaguered JNU community.

Theatrepersons Prasanna and Arundathi Nag, farmer leader Kodihalli Chandrashekar and social activists Tara Krishnaswamy and Srinivas Alavilli were present at the protest venue. “It is not fair that educational institutions are now becoming the target. First, they hiked fees and now they are attacking students. What is the government doing,” Arundathi asked.

“JNU has always been an institution which has raised its voice against atrocities across the country as its students harbour no fear. This is an alarm bell for the country and the government to wake up. Students are the future and can’t be targeted,” she added.

Chandrashekar said Narendra Modi is unfit to be the Prime Minister as he doesn’t keep his word. “Modi said he will help farmers but has done nothing for them. He said he will provide employment to students but is now making them furious,” he said.

Bengaluru, Jun 25: Secondary School Leaving Certificate (SSLC) examinations commenced in Karnataka on Thursday amid relaxation of COVID-19 lockdown restrictions.

Schools in the state ensured that social distancing norms were followed and other precautionary measures taken at the examination centres. All the students underwent thermal screening at the centres and were provided hand sanitisers and masks.

"Today, 464 students are writing the exam. In every classroom, 20 students will be writing their papers. We have also arrangements two separate classrooms for those from containment zones and those who are unwell," said Sister Sagaimir, Principal, St. Joseph's Convent Girls High School.

"We have been working for the last two weeks to put everything in place for the examination Ensuring they maintain social distancing, wear a mask and sanitise," she added.

In other schools, arrangements at the designated centres were inspected before the exams began.

Yesterday, Medical Education Minister Dr K Sudhakar held a video conference with senior officials to review the preparedness for safely conducting the SSLC examinations scheduled on June 25.

"8,48,203 students will appear for the SSLC examination starting tomorrow in 2,879 centres across the state. All the guidelines issues by state government must be followed strictly" Sudhakar said in the meeting.