B T Salian bags Paniyadi award for Tulu novel

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, June 23: A frustrated chartered accountant has committed suicide after killing his wife and mother-in-law in two different cities of India.

The murder-murder-suicide came amid acrimonious divorce proceedings that might have also involved a property dispute, police said.

Amit flew to Bengaluru last weekend to kill his estranged wife at her Whitefield residence before returning to Kolkata, where he shot dead his mother-in-law and then killed himself at an upscale residential complex in North Kolkata on Monday evening.

Amit and his wife Shilpi Agarwal, who is also a CA, had been living separately since last the two years after their marriage turned sour.

Amit took his 10-year-old son from Bengaluru with him on Monday and dropped him at his uncle’s house before heading to his in-laws’ place Phoolbagan, police said.

Neighbours told cops they heard arguments “appeared to be” over some property documents that Amit wanted his in-laws — 70-year-old Subhas and 62-year-old Lalita Dhandhania — to sign.

The first gunshot was heard a little before 6.30pm, following which Subhas ran out of his flat, bolted the door from outside and took refuge inside his next-door neighbour’s apartment. Police arrived a few minutes later to find Amit and his mother-in-law dead. Police found a suicide note from the flat.

Mangaluru, June 21: A local court has held notorious serial killer Cyanide Mohan Kumar guilty in the murder of a 25-year-old woman from Kasargod. This is the 20th and the last case of Cyanide Mohan to be tried in the sixth additional district and sessions court. 

According to public prosecutor Jayarama Shetty, the victim was working as a cook in a ladies hostel and got in touch with Mohan Kumar, a teacher. He visited her house thrice and promised to marry her. On July 8, 2009, on the pretext of visiting a temple in Sullia, she left home, never to return. 

They had travelled to Bengaluru and three days later, when her family tried to reach her on phone, he told them that she had gone for a bath and that they were married and would be returning back home soon.

The next day Ramakrishna, a constable from Upparpete police station, found a lady lying unconscious outside the bathroom and he immediately rushed her to a local hospital, where she was declared dead on arrival. Like in all other cases, after staying in a lodge and having sex with the victim, he took her to the KSRTC bus stand and asked her to consume a cyanide laced tablet, stating it was a contraceptive pill. 

He asked her to leave behind the jewellery that she was wearing at the hotel room. An unnatural death report was registered and since none of her relatives had turned up for identification of the body, on July 15,2009 the body was buried.

The moment the Dakshina Kannada district police arrested the serial killer on October 21, 2009 and his pictures were all over the media, the family recognised him and the victim’s younger sister filed a missing complaint. The police had also recovered the victim’s jewellery from the house of Mohan’s second wife and the jeweller from whom he had purchased cyanide had also identified him. Meanwhile, the CID had taken over the case and a charge sheet was filed.

"The report from the Forensic Science Laboratory is crucial in this case as cyanide was found in the victim’s viscera. Mohan over the years has become a legal expert and in this case, he had sought two adjournments," said Jayaram Shetty. Mohan is currently lodged in the Hindalga central jail.