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Science Announcements, Articles, announcements, comments about science
mullokintyre
post Posted: Sep 22 2020, 11:08 PM
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And on another front in the "we really don't know much" department.
From NEWSZONE

QUOTE
An oval-shaped area of lower magnetic intensity in the atmosphere between South America and Africa is causing concern to NASA over the potential danger it poses to satellites and spacecraft that pass through it, the website ScienceAlert.com reported.

The South Atlantic Anomaly, first identified in 1958, appears to be dividing into two different cells, one over South America and the other off the coast of South Africa.

The concern is due to the fact the weakened magnetic field results in the closest approach of the Van Allen radiation belts to the Earth's surface. That leaves what some scientists refer to a "pothole" or "dent" in which charged solar particles can sail through the Earth's atmosphere and wreak havoc on electronic components, causing them to short-circuit and malfunction."The observed SAA can be also interpreted as a consequence of weakening dominance of the dipole field in the region," according to geophysicist and mathematician Weijia Kuang at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

"More specifically, a localized field with reversed polarity grows strongly in the SAA region, thus making the field intensity very weak, weaker than that of the surrounding regions."

The consequences are that man-made satellites, such as the International Space Station, must take precautions when their orbits take it through the zone. Some satellite operators must routine shut down their equipment to avoid significant data loss or even permanent damage to key components.

Studies have indicated not only is the zone splitting, it appears to be moving to the northwest.

"Even though the SAA is slow-moving, it is going through some change in morphology, so it's also important that we keep observing it by having continued missions," Goddard geophysicist Terry Sabaka said.

"Because that's what helps us make models and predictions."


Had a bit of a chuckle over that last bit.
Their models and predictions didn't show the anomaly, only by the very basic science principle of observtion ond measurement did it get discovered.

Mick



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triage
post Posted: Sep 22 2020, 06:26 PM
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In Reply To: mullokintyre's post @ Sep 21 2020, 09:13 PM

Thanks Mick, it is a great watch. And more impressive work by Aussie Terry Tao.



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"The crisis takes a much longer time coming than you think, and then it happens much faster than you would have thought." Rudiger Dornbush

Mozart fixes everything and Messi is a dog
 
mullokintyre
post Posted: Sep 22 2020, 12:47 PM
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In Reply To: Mork's post @ Sep 22 2020, 10:40 AM

It reinforces to me just how much we really don't know about a lot of things..
Mick



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Mork
post Posted: Sep 22 2020, 10:40 AM
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In Reply To: mullokintyre's post @ Sep 21 2020, 09:13 PM

Nice video,
It brought a chuckle when considering the possibility of the earth flipping becomes a "conspiracy theory"
It's quite interesting to note that the earth has a slow wobble in its rotation axis of about 2%
There's also the story in the bible of the sun coming to a standstill, hieroglyphs in Egypt and ancient myths in China, North & South America describing similar events in pre-history.
Kind of makes you wonder.


 
mullokintyre
post Posted: Sep 21 2020, 09:13 PM
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So how many of us are aware of the Dzhanibekov Effect or Tennis Racket Theorem?
here is a video that demonstrates its effect, and goes a good way to explaining why.
Bizarre behaviour of Spinning objects.
Mick



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birnam
post Posted: Sep 18 2020, 10:15 AM
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In Reply To: mullokintyre's post @ Sep 18 2020, 09:43 AM

This research was awarded the Ig Nobel prize for Psychology. May there be more like it.

https://arstechnica.com/science/2020/09/bel...g-nobel-prizes/


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mullokintyre
post Posted: Sep 18 2020, 09:43 AM
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and they call this science?
FromABC News

QUOTE
The team of psychologists wanted to get to the bottom of previous research that found you can tell a narcissist just by looking at their face.

Their study narrowed it down to to the eyebrows. Thick, dark and dense ones were a dead giveaway for a 'grandiose narcissist' someone who is vain, entitled and superior, and ticks the survey options that say 'I have a natural talent for influencing people,' 'I am a born leader?' and 'I like to show off my body'.

The researchers confirmed their surprise findings through research on hundreds of people, and the results were published in the Journal of Personality last year.

"It was a pretty data driven study," said Miranda Giacomin from MacEwan University.

Still, Dr Giacomin added, it's important to be thoughtful about the results.

"Obviously in our day-to-day lives we don't just judge people based on their eyebrows."


Yeah, right.
mick



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