Science in the News

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Rusty
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Re: Science in the News

Post by Rusty » Mon Feb 27, 2017 11:53 am

https://www.youtube.com/watch?v=dyvTTU_RDus
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Rusty
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Re: Science in the News

Post by Rusty » Mon Feb 27, 2017 12:13 pm

Study suggests we reclassify the moon as a planet—reopening a centuries-old debate

Want Pluto back as a planet? This is the other consequence of Stern's proposal. We'd have well over 100 planets in the system.
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Re: Science in the News

Post by Jester » Mon Feb 27, 2017 12:56 pm

Rusty wrote:
Mon Feb 27, 2017 12:13 pm
Study suggests we reclassify the moon as a planet—reopening a centuries-old debate

Want Pluto back as a planet? This is the other consequence of Stern's proposal. We'd have well over 100 planets in the system.
That is unacceptable! That's 92 too many!
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Re: Science in the News

Post by Rusty » Mon Feb 27, 2017 3:05 pm

Jester wrote:
Mon Feb 27, 2017 12:56 pm
Rusty wrote:
Mon Feb 27, 2017 12:13 pm
Study suggests we reclassify the moon as a planet—reopening a centuries-old debate

Want Pluto back as a planet? This is the other consequence of Stern's proposal. We'd have well over 100 planets in the system.
That is unacceptable! That's 92 too many!
No kidding. Not so cool in the news, eh? It's worse than 92 too many. And our Moon is bigger than Pluto. So readmitting Pluto to the planet family, based upon Stern's criteria, also admits things that are moons, asteroids, etc.
You have to read their raving fine-print in Stern's loony proposal. I doubt that this will be accepted.

Meet some of the 'new' Stern candidates alongside a couple of the smaller old members. He wants to call them planets. Some of them (not just Pluto) have been called planets before. But he thinks this matches up with "people's intuition" concerning planets. No.

Every known round object in the solar system under 10,000 kilometers in diameter, to scale:
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"Under a size cutoff of 10,000 kilometers, there are two planets, 18 or 19 moons, 1 or 2 asteroids, and 87 trans-Neptunian objects, most of which do not yet have names. All are shown to scale, keeping in mind that for most of the trans-Neptunian objects, their sizes are only approximately known."

http://www.planetary.org/multimedia/spa ... -2015.html
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Re: Science in the News

Post by wosbald » Wed Dec 20, 2017 8:53 am

+JMJ+

Rare ‘ghost snow tsunami’ wave caught on camera
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The ‘ghost snow tsunami’ which was pictured in Wyoming in the US (Picture: Caters)

A photographer has captured a rare weather phenomenon that she’s described as a ‘ghost snow tsunami’.

The mirage happens when snow crystals, light and wind are perfectly aligned on the horizon.

Ariel McGlothin was hoping to capture some local wildlife in action when she went out to take some pictures in Kelly, Wyoming, but inadvertently witnessed an incredibly rare spectacle.

Standing before a huge wall of icy powder, a strange mirage began to form as the sun – aligned perfectly with the direction of the wind – began to highlight snow crystals moving in the cold wind, resembling a series of ghostly waves crashing against a shoreline.

[…]


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Ariel McGlothin had hoped to capture pictures of local wildlife and ended up with perfect conditions for the phenomenon (Picture Caters)


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A strange mirage appeared in front of her and she said it made her feel like she needed to run away (Picture: Caters)


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Snow crystals could be seen moving in the cold wind an d it resembled a wave (Picture: Caters)

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Re: Science in the News

Post by wosbald » Thu Mar 07, 2019 7:49 am

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A Lost Page of Notes on Einstein's 'Theory of Everything' Has Turned Up in Jerusalem
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A lost page of Albert Einstein’s handwritten notes and equations has turned up. The page, part of the appendix to a scientific journal article published in 1930, shows one of Einstein’s attempts to unite all the fundamental forces into a single set of equations, or a "theory of everything." (Credit: Copyright The Hebrew University of Jerusalem)

A never-before-seen page of Albert Einstein's handwritten notes and equations on the unified theory of physics has been discovered in an archive of Einstein manuscripts recently acquired by The Hebrew University in Jerusalem.

According to a statement from the university, the newfound page was part of an appendix that Einstein included with a scientific article on unified field theory — the long-sought theory that unites all the fundamental forces of nature into a single set of equations — which Einstein submitted to the Prussian Academy of Science in 1930.

Previously thought lost, the page of elegantly written notes has never been seen or studied since its original submission, according to the statement. [8 Ways You Can See Einstein's Theory of Relativity in Real Life]

The long-lost note turned up in an archive of 110 manuscript pages that The Hebrew University recently acquired from a private collector in Chapel Hill, North Carolina. Many of the new pages have never been displayed to the public before, including 84 pages of mathematical calculations written from 1944-48, plus a number of letters to Einstein's friends and family.

[…]

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Re: Science in the News

Post by wosbald » Wed Jan 06, 2021 11:08 am


ImageImage

"[T]he emergency of irregular migration has to be met with justice, solidarity and mercy. Forms of collective expulsion, which do not allow for the suitable treatment of individual cases, are unacceptable."
— Pope Francis, Morocco

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Re: Science in the News

Post by wosbald » Sun Jan 17, 2021 3:49 pm

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Infected after 5 minutes, from 20 feet away: South Korea study shows coronavirus’ spread indoors [In-Depth]
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An outdoor dining set-up with hand sanitizers and stuffed bears to enforce social distancing in Seoul. (Lee Jin-man / Associated Press)

Dr. Lee Ju-hyung has largely avoided restaurants in recent months, but on the few occasions he’s dined out, he’s developed a strange, if sensible, habit: whipping out a small anemometer to check the airflow.

It’s a precaution he has been taking since a June experiment in which he and colleagues re-created the conditions at a restaurant in Jeonju, a city in southwestern South Korea, where diners contracted the coronavirus from an out-of-town visitor. Among them was a high school student who became infected after five minutes of exposure from more than 20 feet away.

The results of the study, for which Lee and other epidemiologists enlisted the help of an engineer who specializes in aerodynamics, were published last week in the Journal of Korean Medical Science. The conclusions raised concerns that the widely accepted standard of six feet of social distance may not be far enough to keep people safe.

The study — adding to a growing body of evidence on airborne transmission of the virus — highlighted how South Korea’s meticulous and often invasive contact tracing regime has enabled researchers to closely track how the virus moves through populations.

“In this outbreak, the distances between infector and infected persons were … farther than the generally accepted 2 meter [6.6-foot] droplet transmission range,” the study’s authors wrote. “The guidelines on quarantine and epidemiological investigation must be updated to reflect these factors for control and prevention of COVID-19.”

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People wearing face masks walk under a banner emphasizing an enhanced social distancing campaign in front of Seoul City Hall. The banner reads: “We have to stop before COVID-19 stops everything.”(Ahn Young-joon / Associated Press)

KJ Seung, an infectious disease expert and chief of strategy and policy for the nonprofit Partners in Health’s Massachusetts COVID response, said the study was a reminder of the risk of indoor transmission as many nations hunker down for the winter. The official definition of a “close contact” — 15 minutes, within six feet — isn’t foolproof.

[…]

Lee, a professor at the Jeonbuk National University Medical School who has also been helping local authorities carry out epidemiological investigations, went to the restaurant and was surprised by how far the two [case studies] had been sitting [at the restaurant implicated at the center of the study]. CCTV recordings showed the two never spoke, or touched any surfaces in common — door handles, cups or cutlery. From the sway of a light fixture, he could tell the air conditioning unit in the ceiling was on at the time.

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Diagram of the outbreak at a South Korean restaurant equipped with ceiling-type air conditioners: arrows represent the air flow. Curved air streamlines represent where air is reflected off a wall or barrier, and moves downward toward the floor.(Korean Academy of Medical Sciences)

Lee and his team re-created the conditions in the restaurant — researchers sat at tables as stand-ins — and measured the airflow. The high school student and a third diner who was infected had been sitting directly along the flow of air from an air conditioner; other diners who had their back to the airflow were not infected. Through genome sequencing, the team confirmed the three patients’ virus genomic types matched.

“Incredibly, despite sitting a far distance away, the airflow came down the wall and created a valley of wind. People who were along that line were infected,” Lee said. “We concluded this was a droplet transmission, and beyond” 6.6 feet.

The pattern of infection in the restaurant showed it was transmission through small droplets or larger aerosols either landing on the face or being breathed in, said Marr, the Virginia Tech professor who was not involved in the study. The measured air velocity in the restaurant, which did not have windows or a ventilation system, was about 3.3 feet per second, the equivalent of a blowing fan.

“Eating indoors at a restaurant is one of the riskiest things you can do in a pandemic,” she said. “Even if there is distancing, as this shows and other studies show, the distancing is not enough.”

The study was published at a time when South Korea, like many other countries, is on edge amid a new wave of coronavirus infections, with daily case rates hovering around 600 in recent days. Seoul, the capital, this week began requiring restaurants to close by 9 p.m., limiting coffee shops to takeout only and forcing clubs and karaoke bars to shut down.

[…]

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"[T]he emergency of irregular migration has to be met with justice, solidarity and mercy. Forms of collective expulsion, which do not allow for the suitable treatment of individual cases, are unacceptable."
— Pope Francis, Morocco

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