Shobha’s brazen lies a disgrace to Karnataka, says UT Khader

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bidar, Feb 15: Leader of the Opposition in the Assembly Siddaramaiah on Friday demanded the State government to withdraw the sedition case against a mother and a teacher of Shaheen school immediately.

“The police can’t execute anything without the government’s permission. The sedition case against two women should be withdrawn immediately. I will raise the matter in the Assembly to draw the government’s attention,” Siddaramaiah told reporters after meeting the woman at the prison here. 

He clarified that he visited the woman not to support the school, but to extend moral support to her.

“I am an advocate and I can clearly establish based on my experience that staging a satirical play doesn’t amount for sedition. It doesn’t even defame anybody. Three cases of sedition have been registered across the state,” he charged.

He alleged that the government was following dual policy. Though the Supreme Court had concluded that the demolition of Babri Masjid was illegal, a play dealing with the demolition was staged at Kalladka Prabhakar Bhat’s school.
The sedition case had not been registered for staging the play.

He charged that there was an undeclared emergency in the country as the freedom of expression was being suppressed.

Bengaluru, Feb 28: Historian S. Shettar, 85, breathed his last early on February 28 in Bengaluru. He was suffering from respiratory problems and was hospitalised for over a week.

Shettar was known for his multi-disciplinary work, encompassing linguistics, epigraphy, anthropology, the study of religions and art history. He had extensively worked on the Jain practice of ritual death in Karnataka and Asoka edicts. He had studied and compiled early edicts in Kannada and worked extensively on the growth of Kannada language down the ages.

Born in 1935 at Hampasagara, Ballari district, he went on to study at Cambridge University and started his career as a Professor of History at Karnatak University, Dharwad, his alma mater. He later headed the National Museum Institute of the History of Art, Conservation and Museology in 1978 and Indian Council for Historical Research in 1996. He was also a visiting professor at the National Institute of Advanced Studies, Bengaluru.

He was a bilingual historian who wrote in English for most of his career, but started writing in Kannada in later years. In the last two decades, he developed a keen interest in linguistics and wrote multiple books on classical Kannada and Prakrit. His 2007 book “Shangam Tamilagam” is considered a seminal work in the study of the early period of Dravidian languages. It won him Bhasha Samman from Central Sahitya Akademi. He later wrote two works on Halegannada, classical Kannada. His most recent work was “Prakrita Jagadvalaya” in 2018.