Mangaluru engineering college students held for raping 19-yr-old married woman

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jan 19: Technology hub Hyderabad has edged out 129 other cities in the world to emerge as the world's most dynamic city, according to the seventh edition of the City Momentum Index by global real estate services firm JLL.

The city has pushed Bengaluru to second place to regain the top position after a gap of one year. Chennai is at fifth and Delhi is at sixth place.

While Hyderabad and Bengaluru are the top two cities globally for socio-economic momentum, a more active real estate market helped elevate Hyderabad to first position in the overall ranking, says the report released by the US-based Jones Lang Lasalle (JLL) on Saturday night.

Hyderabad recorded the highest office net absorption in 2019 (as a proportion of existing stock) of any city globally, while it is also among the world's best-performing cities for prime office rental growth.

While all seven major Indian cities feature in this year's Global Top 20, cities in south India in particular - Hyderabad, Bengaluru and Chennai (5th) "are ahead of their northern peers, supported by favourable demographics and business climates".

"Their expanding tech industries and start-up cultures make them a magnet for young and ambitious talent from across the country, with Bengaluru having one of the world's largest concentrations of 'engine room' population (20-40-year-olds), typically the most dynamic and productive age cohort," says the report.

Kolkata and Mumbai made it to the top 20 and stood at the 16th and 20th positions. Despite an economic slowdown, India leads the 2020 Index with seven Indian cities in the top 20.

"Commercial real estate in south Indian cities is growing at a rapid pace. Hyderabad has seen tremendous growth in 2019 in line with that of Bengaluru. The city has actively embraced technology-driven economic growth and attracted large tech giants and e-commerce players. The state government's focus on business-friendly policies and provision of high-quality infrastructure along with availability of quality talent pool and superior quality business parks has given Hyderabad a competitive edge," said Ramesh Nair, CEO and Country Head - India, JLL.

Telangana's Minister for Information Technology and Industry K T Rama Rao said he was thrilled over Hyderabad not only regaining the top slot but also over the fact that it was competing with cities like Shenzhen and Shanghai in innovation economy.

The minister said 50 percent weightage from socio-economic indicators beside the remaining 50 percent from commercial and real estate was also heartening.

KTR, as the minister is popularly known, noted that in 2014 when Telangana attained statehood, Hyderabad was not even in the list. He recalled that when Telangana was formed there were many doubts as to what would happen to Hyderabad. "It entered the top 20 in 2015 and rose to fifth place in 2016 and third position in 2017. Hyderabad topped the list in 2018 and finished second the last year. This year it is back at the top," he said.

The JLL City Momentum Index identifies a number of key growth drivers, including talent attraction, the expansion of innovation hubs and better urban planning, that cities can employ to meet the challenges faced by rapid momentum.

Several cities in the top 20 stand out as they transform their urban environments in pursuit of a low-carbon future. In India, Hyderabad is looking at technology to reduce the demand for air conditioning with cool roofs that reflect sunlight and absorb less heat, it said.

"The growth of "micro-mobility" is another positive step, illustrated by Hyderabad's introduction of smart bikes and electric cars. Smart city solutions, such as bike rentals, improved quality of life, help increase inclusion and aid in the transition to a low carbon environment."

Bengaluru, Jan 16: Members and activists of social organisation Rakshana Vedike on Thursday staged a protest and demanded the arrest of BJP MLA Somashekhara Reddy, for his 'provocative' remarks and statements.

The protesters gathered near Gandhi’s statue near Maurya circle in the city and demanded that the BJP MLA should be arrested immediately.

The protesters alleged that Reddy’s remark were aimed at inciting communal hatred and that his remarks do not do justice to his being an elected representative of the people in the state assembly.