An Elizabethtown College professor has developed an embedded sensor that functions in cement much like a thermometer in the Thanksgiving turkey.
“The thermometer indicates if the turkey is done by measuring its internal temperature,” said Nathaniel Hager III, an adjunct faculty member in Elizabethtown’s physics and engineering department. “The embedded sensor does the same thing in concrete by monitoring how quickly water involved in the curing process is chemically combining with portland cement.”
Hager’s research, conducted with business partner and chemist Roman C. Domszy, involves embedding a disposable sensor in a concrete structure when the cement is poured. “A fast electrical pulse is bounced off the sensor, producing a reflected pulse that contains molecular signals due to unreacted water and water combining with portland cement,” Hager said. “Tracking these two signals along with cure time provides a better understanding of the cure process and identifies irregularities that lead to improper cure. Essentially, we’re looking for the signals that correspond with cement strength. If we don’t get them, we have to trust the signals to tell us that something is wrong.”
A quantum spin liquid
24.10.2017 | Boston College
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Salmonellae are dangerous pathogens that enter the body via contaminated food and can cause severe infections. But these bacteria are also known to target...
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
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10.10.2017 | Event News
24.10.2017 | Physics and Astronomy
24.10.2017 | Physics and Astronomy
24.10.2017 | Life Sciences