December: Geminids
The constellation, which the meteor shower has been named after, is considered the radiant point of the shower, explains Ladia. In simple terms, as the Earth nears this debris, that constellation is the point from where the shower appears to begin, to us.
Ladia calls this radiant point a meteor shower’s “address in the sky”. Whichever constellation it seems to be coming from, he says, is what the meteor shower is named after: Lyrids for Lyra, Geminids for Gemini, Perseid for Perseus and so on.
How powerful a meteor shower is, depends on a number of factors, such as how numerous the debris is, the size of each individual particle, its luminosity, and its rate per hour. The standard for measuring that last factor, says Ladia, “is zhr or zenithal hourly rate: how many meteors can one person see per hour on a clear night. It is the measure of the quality of a meteor shower.”
Eastern India most vulnerable to climate change, says study
Updated:
Updated:
April 20, 2021 18:00 IST
Assessment by two IITs and the IISc finds 24 of India’s 100 districts most vulnerable to climate change are in Assam
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A man walks on a garbage dumping site in Guwahati. File
| Photo Credit:
Ritu Raj Konwar
Assessment by two IITs and the IISc finds 24 of India’s 100 districts most vulnerable to climate change are in Assam
The greenest part of India is the most vulnerable to climate change, a study by two Indian Institutes of Technology (IITs) and the Bengaluru-based Indian Institute of Science (IISc) has revealed.
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Multilayer masks are most effective at preventing aerosol generation, says a new study conducted by a team led by researchers at Bengaluru-based Indian Institute of Science (IISc). The study was carried out in collaboration with scientists in UC San Diego and University of Toronto Engineering. According to IISc, when a person coughs, large droplets (>200 microns) hit the inner surface of a mask at a high speed, penetrate the mask fabric and break up or atomise into smaller droplets, which have a greater chance of aerosolisation and thereby carrying viruses like SARS-CoV-2 with them.
Using a high-speed camera, the team closely tracked individual cough-like droplets impinging on single, double and multi-layered masks, and noted the size distribution of the daughter droplets generated after penetration through the mask fabric, an IISc statement said on Saturday.
Study reveals multilayer masks most effective at preventing aerosol generation
India
Updated: Saturday, March 6, 2021, 11:33 [IST]
Bengaluru, Mar 06: Multilayer masks are most effective at preventing aerosol generation, says a new study conducted by a team led by researchers at Bengaluru-based Indian Institute of Science (IISc). The study was carried out in collaboration with scientists in UC San Diego and University of Toronto Engineering.
According to IISc, when a person coughs, large droplets (>200 microns) hit the inner surface of a mask at a high speed, penetrate the mask fabric and break up or atomise into smaller droplets, which have a greater chance of aerosolisation and thereby carrying viruses like SARS-CoV-2 with them.
Multilayer masks most effective at preventing aerosol generation tribuneindia.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from tribuneindia.com Daily Mail and Mail on Sunday newspapers.