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New optical hydrogen sensors eliminate risk of sparking

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Hydrogen as a clean, renewable alternative to fossil fuels is part of a sustainable-energy future, and very much already here. However, lingering concerns about flammability have limited widespread use of hydrogen as a power source for electric vehicles. Previous advances have minimized the risk, but new research from the University of Georgia now puts that risk in the rearview mirror.
Hydrogen vehicles can refuel much more quickly and go farther without refueling than today s electric vehicles, which use battery power. But one of the final hurdles to hydrogen power is securing a safe method for detecting hydrogen leaks.
A new study published in ....

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RIT researchers use Frontera supercomputer to study eccentric binary black hole mergers

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Researchers from Rochester Institute of Technology s Center for Computational Relativity and Gravitation (CCRG) are using the world s most powerful academic supercomputer to perform simulations that will help scientists study eccentric binary black hole mergers.
Professor Carlos Lousto from the CCRG and School of Mathematical Sciences secured one of 58 new science projects for 2021-2022 that received time allocations on the Frontera supercomputer at the Texas Advanced Computing Center (TACC).
Frontera is a National Science Foundation-funded system designed for the most experienced academic computational scientists in the nation. Researchers are awarded time on Frontera based on their need for very large-scale computing, and the ability to efficiently use a supercomputer on the scale of Frontera. ....

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Breakthrough Army technology is a game changer for deepfake detection

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ADELPHI, Md. Army researchers developed a Deepfake detection method that will allow for the creation of state-of-the-art Soldier technology to support mission-essential tasks such as adversarial threat detection and recognition.
This work specifically focuses on a lightweight, low training complexity and high-performance face biometrics technique that meets the size, weight and power requirements of devices Soldiers will need in combat.
Researchers at the U.S. Army Combat Capabilities Development Command, known as DEVCOM, Army Research Laboratory, in collaboration with Professor C.-C. Jay Kuo s research group at the University of Southern California, set out to tackle the significant threat that Deepfake poses to our society and national security. The result is an innovative technological solution called DefakeHop. The researchers worked under the laboratory director s Research Award for External Collaborative Initiative and the Army AI Innovation Institute. ....

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Small generator captures heat given off by skin to power wearable devices

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VIDEO: This video shows the flexible TEG wristband converts heat emitted by skin into electric power and light up an LED.
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Credit: Yijie Liu
Scientists in China have developed a small, flexible device that can convert heat emitted from human skin to electrical power. In their research, presented April 29 in the journal
Cell Reports Physical Science, the team showed that the device could power an LED light in real time when worn on a wristband. The findings suggest that body temperature could someday power wearable electronics such as fitness trackers.
The device is a thermoelectric generator (TEG) that uses temperature gradients to generate power. In this design, researchers use the difference between the warmer body temperature and the relatively cooler ambient environment to generate power. ....

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Denmark's largest battery - one step closer to storing green power in stones

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IMAGE: When there is a surplus of electricity from wind or solar, the energy storage is charged. This is done by a system of compressors and turbines pumping heat energy from.
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Credit: Claus Rye, Stiesdal Storage Technologies.
Pea sized stones heated to 600?C in large, insulated steel tanks are at the heart of a new innovation project aiming to make a breakthrough in the storage of intermittent wind and solar electricity.
The technology, which stores electrical energy as heat in stones, is called GridScale, and could become a cheap and efficient alternative to storing power from solar and wind in lithium-based batteries. While lithium batteries are only cost-effective for the supply of energy for short periods of up to four hours, a GridScale electricity storage system will cost effectively support electricity supply for longer periods - up to about a week. ....

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