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Engineered defects in crystalline material boosts electrical performance • News Service • Iowa State University

Posted 5 hours ago
Xiaoli Tan and a team of campus collaborators used this transmission electron microscope at the Ames Laboratory s Sensitive Instrument Facility to study the effects of engineering defects into certain materials. Larger photo.
Photo by Christopher Gannon.
AMES, Iowa – Materials engineers don’t like to see line defects in functional materials.
The structural flaws along a one-dimensional line of atoms generally degrades performance of electrical materials. So, as a research paper published today by the journal Science reports, these linear defects, or dislocations, “are usually avoided at all costs.”
But sometimes, a team of researchers from Europe, Iowa State University and the U.S. Department of Energy’s Ames Laboratory report in that paper, engineering those defects in some oxide crystals can actually increase electrical performance. ....

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Engineered defects in crystalline material boosts electrical performance

Date Time
Engineered defects in crystalline material boosts electrical performance
Xiaoli Tan and a team of campus collaborators used this transmission electron microscope at the Ames Laboratory’s Sensitive Instrument Facility to study the effects of engineering defects into certain materials. Larger photo. Photo by Christopher Gannon.
AMES, Iowa – Materials engineers don’t like to see line defects in functional materials.
The structural flaws along a one-dimensional line of atoms generally degrades performance of electrical materials. So, as a research paper published today by the journal Science reports, these linear defects, or dislocations, “are usually avoided at all costs.”
But sometimes, a team of researchers from Europe, Iowa State University and the U.S. Department of Energy’s Ames Laboratory report in that paper, engineering those defects in some oxide crystals can actually increase electrical performance. ....

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Not all theories can explain the black hole M87* | EurekAlert! Science News

Theoretical physicists at Goethe University Frankfurt have analysed data from the black hole M87 as part of the Event Horizon Telescope (EHT) collaboration to test Albert Einstein s theory of general relativity. According to the tests, the size of the shadow from M87 is in excellent agreement being from a black hole in general relativity, but sets constraints on the properties of black holes in other theories. ....

New York , United States , New Zealand , Frankfurt Am Main , Luciano Rezzolla , Prashant Kocherlakota , Troy Kerr , Radioastronomie Millim , Karl Schwarzschild , Main University Alliance , University Of Mainz , Technical University Of Darmstadt , Perimeter Institute For Theoretical Physics , Goethe University , University Of Chicago , Max Planck Institute For Radio Astronomy , Radboud University , University Of Arizona , National Astronomical Observatory Of Japan , Academia Sinica Institute Of Astronomy , Professor Luciano Rezzolla , Theoretical Physics , Goethe University Frankfurt , Event Horizon Telescope , James Clerk Maxwell Telescope , Large Millimeter Telescope ,

Apple's 'Find My' Network Exploited via Bluetooth

The ‘Send My’ exploit can use Apple's locator service to collect and send information from nearby devices for later upload to iCloud servers. ....

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Researchers Abuse Apple's Find My Network for Data Upload

By Ionut Arghire on May 13, 2021
Security researchers have discovered a way to leverage Apple’s Find My s Offline Finding network to upload data from devices, even those that do not have a Wi-Fi or mobile network connection.
Using Bluetooth Low Energy, the data is being sent to nearby Apple devices that do connect to the Internet, and then sent to Apple’s servers, from where it can be retrieved at a later date.
The technique could be used to avoid the costs and power usage associated with mobile Internet, or to exfiltrate data from Faraday-shielded sites visited by iPhone users, researchers with Positive Security, a Berlin-based security consulting firm. ....

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