Veerendra Heggade, Pejawar seer should start projects in North-East: Governor

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Udupi, Jul 14: Abhijna Rao, a student of Vidyodaya PU College, Udupi, has emerged state topper in the science stream of II PUC. 

Abhijna has secured 596 marks in the II PUC examination-2020, the results of which were announced on Tuesday July 14. She scored a perfect 100 marks in Physics, Chemistry, Mathematics and Computer Science (PCMC). In Sanskrit and English she scored 100 and 96 marks respectively.

She had secured second position in the Karnataka SSLC examinations two years ago.

She is daughter of Asha Rao and Vittal Rao, a retired professor. Her sister Raksha Rao has completed Engineering from NITK Suratkal.

“After securing second rank in the state in SSLC, my target was to score more in PUC examinations. My parents and lecturers have supported me in my studies. All my teachers gave me proper guidance. Vidyodaya College also supported me. I was studying on a daily basis. The exams were easy and I had expected to score above 590. I am very happy to score 596," she said.

Bengaluru, Jan 3: Prime Minister Narendra Modi on Friday called on young scientists of India to "Innovate, Patent, Produce and Prosper," and said these four steps would lead our country towards faster development. The Prime Minister also stressed on the need to transform the landscape of Indian science, technology and innovation.

"The growth story of India depends on its success in the science and technology sector. There is a need to transform the landscape of Indian science, technology and innovation," Modi said.

Speaking after inaugurating the 107th Session of Indian Science Congress, he said, "My motto for the young scientists in this country is -Innovate, Patent, Produce and Prosper. These four steps will lead our country towards faster development."

"If we innovate we will patent and that in turn will make our production smoother and when we take these products to the people of our country, I'm sure they will prosper," he said, adding that innovation for the people and by the people is the direction of our new India. The Prime Minister also said he was happy to learn that India's ranking has improved in the Global Innovation Index to 52.

"Our programmes have created more technology business incubators in the last five years than in the previous 50 years. I congratulate our scientists for this achievement," he added.