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06/19/18
Welcome to SciTechNature get-togethers
Intros | News | Rob Lerner: Recent science news and stories of interest,
including "Solutions for So Cal Water Woes"
"Are We Ready for the Next Pandemic"
"More Amazing Microbes"
Main topic: "Geoengineering: Moral Hazard or Salvation?"
Stephen Goodfellow: "The Coronal Heating Problem"
Location & Time:Tuesdays, 11:30am to 1:30pm
Quinta Loreto Hotel, Cjon. de Loreto 15, Centro, Zona Centro, 37700 San Miguel de Allende, Gto.
From Cjon. de Loreto, enter the Mercado de Artisanias alley (East, going up-hill) about twenty yards and turn to your left into the Hotel Quinta Loreto compound.
The community center is on the Southeast side of the little central park. If you are coming by car, there is a parking lot within the compound.
(The community center is in the same location as the Philosophical get-together which is held on Fridays.)
A 50 pesos donation is suggested.
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Introductions/News
We introduce ourselves; A quick overview of weekly news in science, nature and technology.********SMA Science Book Club news
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Presentations
Dennis Taylor brings us this interesting link:
"Interesting article on sequestering CO2 in concrete"
Terra Mizwa will present some short SCIENCE articles.
Intro's | News | Rob Lerner: Recent science news and stories of interest,
including "Solutions for So Cal Water Woes"
"Are We Ready for the Next Pandemic"
"More Amazing Microbes"
Main topic: "Geoengineering: Moral Hazard or Salvation?"
Stephen Goodfellow: "The Coronal Heating Problem"
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Stephen Goodfellow's links from News last week:
Solar Update, Cosmic Rays Rising, Volcano Data
https://www.youtube.com/watch?list=PLHSoxioQtwZeQaRnO5_9AJB2RmevUpuPT&v=FUpwFmwK4sE
When we last discussed Cavity Phenomena
https://sites.google.com/site/scitecnature/2016-scitechnature/11-16-16---the-living-universe
Sonoluminescence; small cavity bubble subjected to specific sound frequencies produce temperatures hotter than the Sun:
https://www.youtube.com/watch?v=O9B3vzsZsr4
Underwater Explosions at 120,000fps - The Slow Mo Guys - YouTube
https://youtu.be/E5rGFZWQfzk?t=2m37s
Incredible Super Slow Motion Bullet Impact. Notice the contraction and re-expansion of the cavity:
https://youtu.be/fX4ODh1g4eM?t=12s
The Carina Nebula; cavity left by an exploding star. Note the bow shock, as the outward push of the explosion hits the interstellar matter:
https://apod.nasa.gov/apod/image/1412/CarinaExpanding_Hubble_750d.gif
Another example of an exploding nebula:
And another. Terra commented how the two cavities looked like mirrored jellyfish:
https://www.jpl.nasa.gov/spaceimages/images/largesize/PIA04216_hires.jpg
And yet another, this one in amazing detail:
In this beautifully detailed photo, one can observe the shock wave ripples inside the 'shell',
http://www.sciencemag.org/sites/default/files/images/cc_nebulae2_16x9.jpg
...so similar to those seen in the underwater gun discharge.
Cavitation! explained HD - YouTube
https://www.youtube.com/watch?v=ON_irzFAU9c
Earthly cavitation damage on man-made metal objects:
David McClintock's links from News last week:
https://www.youtube.com/watch?v=saCdvAp5cow
HOW A SINGLE SWEDISH SUBMARINE DEFEATED THE US NAVY
Despite the somewhat extreme title, it is true technology changes
and the latest non-nuclear powered modern submarines have
capabilities much to be respected and feared.
http://www.imf.org/external/pubs/ft/fandd/basics/trade.htm
INTERNATIONAL TRADE: COMMERCE AMONG NATIONS by the International Money Fund
Nations are almost always better off when they buy and sell from one another
I showed a short piece of this article to establish the basic principles of free trade.
The whole article is short and worth reading.
https://www.youtube.com/watch?v=DnW9ZQtI1_E
THE DECEPTIVE PROMISE OF FREE TRADE | DW DOCUMENTARY
Free Trade IS an important tpic and generally a Good Thing.
But there are daunting problems.
A bit of background:
Just after World War II, when the USA was nearly 90% of the world's economic output
when the USA was very self-confident and in a position to believe it should
establish a "new world order" then the US was remarkably altruistic and self-interested
at the same time. The great fear then was that a solitary giant economy would want to
sell its surplus abroad. The rest of the world, reeling from the dislocations of the war
were of a mind to protect their re-building economies.
So the US kindly pushed for free trade.
Free Trade (Brenton Woods, GATT, WTO, etc...) did bring about an increase in global prosperity.
But just like Hans Rosling's presentations that the world HAS made progress, the benefits are broadly spread whereas the disadvantages, the losers in those changes, are acutely felt.
How to balance the competing interests is a puzzle yet to be solved, likely by messy half-measures that try to help while other measures will assist the politically important at the expense of the commonweal.
Today, the economy of China is likely as large as that of the US.
Everything manufactured seems to be made well enough and much cheaper in China.
So the current president is pushing for higher tariffs and other restraints on trade.
It is unknown if those efforts will result in trade wars that could hurt more than they help.
TO AVOID "local" POLITICS, I BELIEVE IT IS HELPFUL TO SEEK AND FIND DOCUMENTARIES FROM ELSEWHERE (NOT THE US) THAT EXAMINE FREE TRADE LESS ARGUMENTATIVELY AND PERHAPS MORE CORRECTLY.
So, here we present this important topic from the point of view of Germany, a huge exporting economy.
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The other SMA Science Group
i³: Ideas that Inform and Inspire - Join mailing list ********
The SMA Rotary Club rests upon a foundation of compassion and science, so it too gets a heads up from SciTechNature.
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Link to John Wharton's Shelter Space; an excellent source of SciTechNature trace elements:sheltervg4.com
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The SciTechNature get-together is also on Facebook.
Best,
Stephen Goodfellow
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