Manipal: Seminar on Understanding Islam' on Saturday

Mangaluru, Apr 6: City Police Commissioner Dr P S Harsha has directed coastal security personnel to block the boat service near Talapady after reports of Kasarogod people using boats to cross over to Dakshina Kannada via Talapady river emerged, Dakshina Kannada District in-charge Minister Kota Srinivas Poojary said here on Monday.

Following the rise in Coronavirus cases in the neighbouring Kasargod district, District Commissioner Sindhu Roopesh ordered closure of borders with Kerala and totally suspended vehicular movement, including for medical emergencies.

However, now the people living in Talapady and surrounding areas allege that the government has failed to monitor people using boats to cross over to Dakshina Kannada via Talapady river.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

New Delhi, Jan 14: The Kerala government has challenged the new Citizenship (Amendment) Act (CAA) before the Supreme Court, becoming the first state to do so amid nationwide protests against the religion-based citizenship law. The Supreme Court is already hearing over 60 petitions against the law.

Kerala's Left-led government in its petition calls the CAA a violation of several articles of the constitution including the right to equality and says the law goes against the basic principle of secularism in the constitution.

The Kerala government has also challenged the validity of changes made in 2015 to the Passport law and the Foreigners (Amendment) Order, regularising the stay of non-Muslim migrants from Pakistan, Bangladesh and Afghanistan who had entered India before 2015.

The Citizenship Amendment Act (CAA), eases the path for non-Muslims in the neighbouring Muslim-majority nations of Pakistan, Afghanistan and Bangladesh to become Indian citizens. Critics fear that the CAA, along with a proposed National Register of Citizens (NRC), will discriminate against Muslims.

The Kerala petition says the CAA violates Articles 14, 21 and 25 of the constitution.

While Article 14 is about the right to equality, Article 21 says "no person will be deprived of life or personal liberty except according to a procedure established by law". Under Article 25, "all persons are equally entitled to freedom of conscience."

Several non-BJP governments have refused to carry out the NRC in an attempt to stave off the enforcement of the citizenship law.

Over 60 writ petitions have been filed in Supreme Court so far against the Citizenship (Amendment) Act. Various political parties, NGOs and also MPs have challenged the law.

The Supreme Court will hear the petitions on January 22.

During the last hearing, petitioners didn't ask that the law be put on hold as the CAA was not in force. The Act has, however, come into force from January 10 through a home ministry notification.