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Posts Tagged ‘Stephen Perry

“They swore by concrete. They built for eternity.”*…

 

These are interesting times for the concrete industry. After the misery of the 2008 financial crisis, construction in America is back in rude health, albeit patchily. Texas, California, and Colorado are all “very hot,” attendees say, as places where new hotels and homes and offices are being built. Demand is so high in these states that concrete-pump manufacturers are apparently having trouble filling orders. Employees worry that with baby boomers retiring, there isn’t the skilled labor force in place to do the work.

But America’s public infrastructure is still a mess—rusting rebars and cracked freeways stand as miserable testaments to a lack of net investment. It’s a complex and cross-party problem, as James Surowiecki has described in The New Yorker. Republicans have shied away from big-government investment– though of course Trump paved his pathway to the White House with pledges to build roads, hospitals, and, of course, a “great great wall”– and the increasing need to get the nod from different government bodies makes it hard to pass policy. For politicians keen on publicity, grand plans for big new things are exciting. But the subsequent decades of maintenance are thankless and dull…

Georgina Voss reports from World of Concrete, the concrete and masonry industry’s massive trade gathering—a five-day show that attacts more than 60,000 attendees.

How the construction business and the politics of the moment are mixed for the pour: “Welcome to the SXSW of Concrete.”

Pair with this piece on the state of dams in the U.S.

* Günter Grass

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As we wait for it to set, we might recall that it was on this date in 1845 that a method for manufacturing elastic (rubber) bands was patented in Britain by Stephen Perry and and Thomas Barnabas Daft of London (G.B. No. 13880/1845).

In the early 19th century, sailors had brought home items made by Central and South American natives from the sap of rubber trees, including footwear, garments and bottles.  Around 1820, a Londoner named Thomas Hancock sliced up one of the bottles to create garters and waistbands. By 1843, he had secured patent rights from Charles Macintosh for vulcanized india rubber.  (Vulcanization made rubber stable and retain its elasticity.)  Stephen Perry, owner of Messrs Perry and Co,. patented the use of india rubber for use as springs in bands, belts, etc., and (with Daft) also the manufacture of elastic bands by slicing suitable sizes of vulcanized india rubber tube.  The bands were lightly scented to mask the smell of the treated rubber.

 source

 

Written by LW

March 17, 2017 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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