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Day two of David Pecker testimony wraps in NY Trump trial; Supreme Court hears arguments on Idaho's near-total abortion ban; ND sees a flurry of campaigning among Native candidates; and NH lags behind other states in restricting firearms at polling sites.

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The Senate moves forward with a foreign aid package. A North Carolina judge overturns an aged law penalizing released felons. And child protection groups call a Texas immigration policy traumatic for kids.

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Wyoming needs more educators who can teach kids trade skills, a proposal to open 40-thousand acres of an Ohio forest to fracking has environmental advocates alarmed and rural communities lure bicyclists with state-of-the-art bike trail systems.

UNR Test Bridge Withstands Massive Simulated Earthquake

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Wednesday, February 11, 2015   

RENO, Nev. - An experimental bridge at the University of Nevada-Reno recently withstood a simulated earthquake more than twice as powerful as the Northridge quake that struck Los Angeles in 1994.

Saiid Saiidi, a civil-engineering professor at the university's Earthquake Engineering Laboratory, said the goal of the research is to build bridges that can be used after a major earthquake.

"Just picture having a strong earthquake in San Francisco, and 20 or 30 bridges collapse; then the city will come to a standstill," he said. "So it's not just saving lives during the earthquake on the bridge, it's what happens afterward."

Saiidi said his test bridge has columns made of nickel, titanium, aluminum and copper, which can be distorted about 20 times as much as the steel components used in conventional construction. What he called shape-memory alloys allow the bridge to shift and return to its original position in earthquakes as powerful as magnitude 7.5 and higher.

Saiidi said his research is leaving the laboratory and being used in the construction of a bridge in downtown Seattle.

"The Federal Highway Administration, once they found out about the research, and the Washington Department of Transportation, they said, 'Well, let's try to do this. Put in an actual bridge and showcase it for the whole country to see,' " he said.

Saiidi said the project is scheduled to break ground next month - the first time any shape-memory alloys have been used in any bridge project in the United States. Saiidi said building bridges using his research costs about 5 percent more than conventional steel-and-concrete construction.


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Creedon Newell practices teaching construction skills in Wyoming's new career and technical educator bridge course, designed to encourage trades students and professionals to pursue a career in CTE teaching. (Photo by Rob Hill)

Social Issues

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By Lane Wendell Fischer for the Shasta Scout via The Daily Yonder.Broadcast version by Suzanne Potter for California News Service for the Public News …


Environment

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By Naoki Nitta for Civil Eats.Broadcast version by Suzanne Potter for California News Service reporting for the Solutions Journalism Network-Public Ne…

Social Issues

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Concerns about potential voter intimidation have spurred several states to consider banning firearms at polling sites but so far, New Hampshire is …


Environment

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The construction of more solar farms in the U.S. has been contentious but a new survey shows their size makes a difference in whether solar projects …

Political fights were once considered "taboo" for school boards but things like book bans and debates over diversity programs have brought more tension to the day-to-day functions of the panels. (Adobe Stock)

Social Issues

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Minnesota's largest school district is at the center of a budget controversy tied to the recent wave of school board candidates fighting diversity pro…

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Minnesota lawmakers are considering a measure which would force employers to properly classify certain trade union workers and others as employees rat…

Health and Wellness

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By Mary Anne Franks for Ms. Magazine.Broadcast version by Alex Gonzalez for Northern Rockies News Service reporting for the Ms. Magazine-Public News …

 

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