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Posts Tagged ‘Glenn Seaborg

“For I have trained myself and am training myself always to be able to dance lightly in the service of thought”*…

 

dance

For the last 11 years, Science and the AAAS have hosted Dance Your Ph.D., a contest that challenges scientists around the world to explain their research through the most jargon-free medium available: interpretive dance. [see here and here]

This years winners have been announced:

Scientific research can be a lonely pursuit. And for Pramodh Senarath Yapa, a physicist at the University of Alberta in Edmonton, Canada, even the subject of his research is lonely: singleton electrons wandering through superconducting material. “Superconductivity relies on lone electrons pairing up when cooled below a certain temperature,” Yapa says. “Once I began to think of electrons as unsociable people who suddenly become joyful once paired up, imagining them as dancers was a no-brainer!”

Six weeks of choreographing and songwriting later, Yapa scooped the 2018 “Dance Your Ph.D.” contest. The judges—a panel of world-renowned artists and scientists—chose Yapa’s swinging electron dance from 50 submissions based on both artistic and scientific merits. He takes home $1000 and immortal geek fame…

Learn more, and see other category winners at “The winner of this year’s ‘Dance Your Ph.D.’ contest turned physics into art.”

* Søren Kierkegaard

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As we tempt Terpsichore, we might spare a thought for Glenn Theodore Seaborg; he died o this date in 1999.  A chemist, his discovery and investigation of plutonium and nine other transuranium elements was part of the effort during World War II to develop an atomic bomb; it earned him a share of the 1951 Nobel Prize in Chemistry.

Seaborg went on to serve as Chancellor of the University of California, as Chair of the Atomic Energy Commission, and as an advisor to 10 presidents– from Harry S. Truman to Bill Clinton– on nuclear policy and science education.  Element 106 (the last of the ten that Seaborg discovered), was named seaborgium in his honor.

Like so many of the scientists who worked on the Manhattan Project, Seaborg became a campaigner for arms control.  He was a signatory to the Franck Report and contributed to the Limited Test Ban Treaty, the Nuclear Non-Proliferation Treaty and the Comprehensive Test Ban Treaty.

 source

 

Written by LW

February 25, 2019 at 1:01 am

They Came from Outer Space!…

source:  NASA, via IEEE Spectrum

For years, scientists have known that satellites and astronauts are vulnerable to “space weather,”  more specifically to  geo-magnetic storms that generate “killer electrons” powerful enough to penetrate shielding, damage spacecraft, and injure spacemen.  But no one has been able to explain just how these nefarious particles are produced… so there’s been no trustworthy ability to predict– and avoid– them.

Now, as IEEE Spectrum and the European Space Agency report, scientists affiliated Los Alamos National Labs and a separate team at the ESA have begun to explain the phenomenon.   The details are referenced in the cited reports; here suffice it to say that the electrons (originating in the Van Allen Belt) are accelerated– to velocities approaching the speed of light– by a combination of Very Low Frequency and (higher amplitude) Ultra Low Frequency electromagnetic waves, themselves excited by the impact of solar storms on the earth’s protective electromagnetic bubble.

And not a moment too soon:  As Philippe Escoubet, an ESA scientist remarks, “These new findings help us to improve the models predicting the radiation environment in which satellites and astronauts operate. With solar activity now ramping up, we expect more of these shocks to impact our magnetosphere over the months and years to come.”

As we re-fit our tin foil helmets, we might recall that it was on this date in 1845 that Stephen Perry patented the rubber band. The milk of the rubber tree had been long used by folks who lived where the trees were native to make shoes, clothes, and “bottles”– which were brought back to England by returning sailors.  In 1820, Thomas Hancock sliced up one of the bottles to create elastic garters and “belts.”   Perry, who owned a rubber manufacturing company was sufficiently taken with Hancock’s idea to file a patent on the rubber band– the first of which were made from vulcanized rubber.  (They are now commonly made of a combination of rubber and latex.)

rubber bands

(It was also on this date in 1950 that Glenn Seaborg and a team of colleagues at UC Berkeley announced a new element, number 98– Californium– a radioactive element the isotopes of which have important medical and industrial uses, as they are powerful point sources of neutrons.)

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