Nanoimprinting Technique for Humidity-Responsive Holographic Images

A magical display that projects holographic images that change when in contact with water has been developed. This new technology increases the possibility of commercialization as it can infinitely imprint holographic images.

A POSTECH research team led by Professor Junsuk Rho (Department of Mechanical Engineering and Department of Chemical Engineering) and Ph.D. candidates Byoungsu Ko, Younghwan Yang, Jaekyung Kim, and Dr. Trevon Badloe has developed a technology for a humidity-responsive display that changes in brightness and color depending on the degree of humidity.

The team first successfully realized holographic images with tunable brightness using polyvinyl alcohol (PVA)...

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The World’s Largest Turbulence Simulation Unmasks the Flow of Energy in Astrophysical Plasmas

Solar corona
Halo-like solar corona. (Photo courtesy of NASA.)

Researchers have uncovered a previously hidden heating process that helps explain how the atmosphere that surrounds the Sun called the “solar corona” can be vastly hotter than the solar surface that emits it.

The discovery at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) could improve tackling a range of astrophysical puzzles such as star formation, the origin of large-scale magnetic fields in the universe, and the ability to predict eruptive space weather events that can disrupt cell phone service and black out power grids on Earth. Understanding the heating process also has implications for fusion research.

First clear 3D explanation

“Our direct numerical simulation is the first to pro...

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A type of simple DIY Air Filter can be an effective way to Filter Out Indoor Air Pollutants

A type of simple, DIY air filter can be an effective way to filter out indoor air pollutants
A study from researchers at Brown University and Silent Spring Institute found that inexpensive, easy-to-assemble Corsi-Rosenthal boxes can help reduce exposure to indoor air pollutants. Credit: Ken Zirkel

A team of researchers from Brown University’s School of Public Health, Brown’s School of Engineering and Silent Spring Institute found that simple air filtration devices called Corsi-Rosenthal boxes are effective at reducing indoor air pollutants.

The study, which analyzed the effectiveness of Corsi-Rosenthal boxes installed at the School of Public Health to help prevent the spread of COVID-19, is the first peer-reviewed study of the efficacy of the boxes on indoor pollutants, according to the authors.

Lowering indoor air concentrations of commonly-found chemicals known to pose...

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Scientists investigate Potential Regolith Origin on Uranus’ Moon Miranda

Credit: NASA/JPL-Caltech

In a recent study published in The Planetary Science Journal, a pair of researchers led by The Carl Sagan Center at the SETI Institute in California investigated the potential origin for the thick regolith deposits on Uranus’ moon, Miranda. The purpose of this study was to determine Miranda’s internal structure, most notably its interior heat, which could help determine if Miranda harbors—or ever harbored—an internal ocean.

“It is unlikely that Miranda would be able to retain a subsurface ocean to the present day due to its small size,” said Dr. Chloe Beddingfield, who is a scientist at the NASA Ames Research Center...

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