This is not a Muslim ban; over 40 Muslim countries not affected by order: Trump

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kasaragod, May 30: Karnataka origin IPS officer D Shilpa has been appointed the new Superintendent of Police of Kasargod district.

The 35-year-old 2016-batch IPS officer is the first woman SP of Kasaragod. 

Her appointment follows the sudden transfer of P S Sabu who was hitherto holding the post. He has now been appointed as SP of Alappuzha.

Shilpa has earlier served as ASP of Kasargod. She was also ASP of Kannur during the 2019 Lok Sabha elections.

Shilpa was one of the three IPS officers assigned to Kasaragod with IG Vijay Sakhare during the first phase of covid lockdown.

A native of HSR Layout in Bengaluru, Shilpa holds a Bachelor's degree in Electronics Engineering and a Masters Degree in Business Administration.

Bengaluru, Jul 8: The expert committee constituted by the Karnataka government to look into imparting online education in the wake of the COVID-19 lockdown submitted its report on Tuesday to the Minister for Primary and Secondary Education, S Suresh Kumar.

Amid growing pressure by educational institutions to allow them to run online classes for the students, the government set up the committee headed by noted educationist M K Sridhar.

The Minister told reporters that some schools wanted to run online classes, including for LKG and UKG students. It had also come to the government's notice that schools were reportedly charging hefty fees in the name of online teaching, he added.

"To address the concerns of parents, schools, and the future of the children, the committee was formed,"Kumar said. He further said that the government would study the recommendations and hold discussions with officials and various stakeholders before arriving at a decision.

The Education Department said that the committee, in its report, titled "Continuation of Learning in School Education of Karnataka: Guidelines During COVID-19 Pandemic for Technology Enabled Education and Beyond", has recommended teaching online or by using printed material. The committee suggested that children in the age group of three to six be taught online by way of story-telling, rhymes and games strictly in the presence of parents thrice a week just for one session a day For students from class one to three, it advised two periods a day and three days a week for online teaching.

Students from class three to five would have classes five days a week and two classes for 30 minutes a day. For students from class six to eight, there could be three classes a day for a duration of 30 minutes to 45 minutes each, while for students of class nine and 10 there would be four sessions a day between 30 and 45 minutes each.

The committee also suggested usage of Doordarshan and Akashwani for the government school children. Suresh Kumar said there were a few petitions filed in the Karnataka High Court regarding online teaching to the children.