BJP will sweep DK, Udupi; gain two-thirds majority in Karnataka: Javadekar

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Thiruvananthapuram, Mar 28: A man from Kerala was among the terrorists affiliated to Islamic State (IS) who allegedly attacked a Gurdwara in Kabul earlier this week in which 27 people were killed.

The IS has claimed that one of the suicide bombers was Abu Khalid al-Hindi.

According to sources, investigation agencies on Friday have identified him as 29-year-old Mohammed Sajid Kuthirummal of Padne in Kasargod. He was among the 14 persons, who left from Kerala to join IS in Nangarhar province of Afghanistan.

"IS had released the name Abu Khalid al-Hindi through its media agency soon after the attack. The photograph of him holding a rifle was also published by IS in their propaganda magazine Al Naba. From that, we have identified the person as Mohammed Sajid Kuthirummal. We are investigating the matter and in touch with the investigating agencies in Afghanistan for tracking his trail," sources told ANI.

The National Investigation Agency (NIA) probe had earlier revealed that Mohammed Sajid was recruited by Abdul Rashid Abdulla of Chandera, who was killed in Afghanistan last year.

Sajid worked as a shop keeper in a gulf country and returned to Kerala. Based on a complaint by Sajid's father Mahamood, the FIR was registered at Chendara Police Station, Kasaragod in 2016 regarding Sajid joining IS and leaving for Afghanistan.

He was among the 14 member team that left from Kerala to join IS in Khorasan Province' in Nangarhar.

ANI had earlier reported that two of these members Ayesha alias Sonia Sebastian and Fathima alias Nimisha who were in IS had expressed their interest in returning to Kerala. Out of 14, seven including Sajid is dead.

Dharwad, Jan 5: Hameed Khan, a noted sitar exponent and descendant of renowned sitarist Ustad Rahimat Khan, passed away at his residence here on Saturday night.

He was 69 and survived by wife Fareeda, son Mohsin Khan (a musician) and daughter Arma Khan (an artist).

Hameed Khan taught sitar at Karnatak University’s college of music and also at the family-run music school ‘Bharateeya Sangeeta Vidyalaya’. Several of his disciples who were foreign nationals helped him establish ‘Kalakeri Sangeet Vidyalaya’ at Kalakeri village near Dharwad, which provides music lessons to the deprived.