Young scientists from Puttur make it big internationally

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jun 18: The Karnataka police has arrested a German national wanted for kidnapping and causing bodily harm to a person in his home country, an official said on Wednesday. The person was also found to be overstaying on an expired visa, which police said that it appeared that the visa had been tampered with to look more current.

"On receipt of credible information by the CID Interpol Division officers, the Red Corner Notice subject, the German national Alexander Bruno Wehnelt, was traced at Hulimangala village," a police official told media persons.

Hulimangala is on the outskirts of Bengaluru city.

Alexander, 55, escaped from Germany and took shelter in Bengaluru.

The Interpol Division of CBI NCB (Central Bureau of Intelligence, Narcotics Control Bureau) in New Delhi had communicated to the Interpol liaison officer in Karnataka's Criminal Investigation Department (CID) about Alexander, directing extensive search measures to trace the criminal at large.

The Narcotics Control Bureau of Wiesbaden in Germany was on the hunt for Wehnelt for the crimes he committed in 2015, and have finally found him five years later.

"A special team of officers was constituted by the CID - Interpol division under the supervision of ADGP (Additional Director General of Police) B. Dayananda and the Interpol liaison officer and efforts were made to trace the subject," said the official.

On Monday, the police received credible information leading to his arrest.

"It was learnt that his visa had expired in 2016 and he tried to show a visa which was issued in December 2019 which had expired on Saturday, June 13," said the official.

Prima facie, it appeared that Alexander had tampered with his visa and the police are probing on that front as well.

He was handed over to Hebbagodi Police Station in Bengaluru Urban, for his overstay and a criminal case has been registered against him, under the Foreigners Act.

Bengaluru, Jan 2: Accusing Prime Minister Narendra Modi of "neglecting" Karnataka ahead of his visit on Thursday, the state Congress questioned why he did not give adequate relief and pay a visit to the state, when most of its parts were affected by severe floods last year.

Modi will begin his two-day visit to the state on Thursday afternoon.

The Congress' Karnataka unit in a series of tweets also questioned the Prime Minister about not conferring the "Bharat Ratna" on Shivakumara Swamiji of Siddaganga Math, who passed away last year at the age of 111 years.

"Why you did not visit the state, when it was affected by floods? Despite the damage of over Rs 1 lakh crore why you did not declare it as a national disaster? Why you did not give interim relief? When the state government has given a report that the damage caused was to the tune of Rs 35,300 crore why did you sit quiet by giving just Rs 1,200 crore," the state Congress tweeted.

As many as 103 taluks in 22 districts of Karnataka were affected due to unprecedented floods in August, in which over 80 people were killed.

Around seven lakh people were shifted to safe areas during the deluge and thousands of houses were damaged.

In October, various parts of the state faced a deluge for the second time in two months, killing over 13 people and damaging thousands of houses.

Asking as to why the Centre was not giving the state's share of GST amount adequately, the Congress questioned as to why dues under MNREGA programme were not paid so far, and why Karnataka was being neglected while allocating grants.

Questioning Modi as to why he did not visit Tumakuru when Shivakumara Swamiji of Siddaganga Math passed away, the principal opposition party in the state Assembly, also sought to know why the seer was not conferred with the Bharat Ratna yet.

It also pointed out that former Chief Minister Siddaramaiah had written a letter in this regard in January 2018.

The Congress has also hit out at the BJP-led Central government over imposition of Hindi language by neglecting regional languages and mother tongue.

The Prime Minister will kickstart his visit to the state by paying tributes to the late pontiff's 'Gadduge' (final resting place) at the Math premises near Tumakuru.

Later, he will attend an event organised to give away Krishi Karman awards and to distribute fishing equipment at the government college ground in Tumakuru, before leaving for Bengaluru where he will be attending a DRDO event.

On Friday he will be inaugurating 107th Indian Science Congress here.