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Achiral crystal reveals Raman optical activity through ferroaxial order

Raman optical activity, long thought to require chiral molecules or magnetic order, has been demonstrated in an achiral, nonmagnetic crystal by researchers at the Institute of Science Tokyo. The effect arises through ferroaxial order, a coordinated rotation of atoms within the lattice, and is detected using circularly polarized Raman spectroscopy. The findings show that optically inactive materials can also display chirality-like optical responses and expand the scope of optical techniques...

Phys.org 2d ago

Real-time data assimilation system outperforms flood early warning system

Researchers at the Institute of Industrial Science, the University of Tokyo (UTokyo-IIS), have developed a real-time data assimilation system that substantially improves streamflow and flood forecasting accuracy across Japan. This new data assimilation system outperforms Japan's current early warning system. Compared with the previous early warning system, the new data assimilation system yields improved forecasts for 80% of the major river reaches in Japan and enables reliable flood...

Phys.org 23h ago

Catalysts that prevent boil-off losses in liquid hydrogen production hold promise for a hydrogen-energy society

Catalysts that prevent boil-off losses in liquid hydrogen production hold promise for a hydrogen-energy society Stephanie Baum Scientific Editor Andrew Zinin Lead Editor A joint research team has discovered high-performance catalysts capable of significantly reducing "boil-off losses," which had been a longstanding issue in liquid hydrogen storage and transportation. These composite catalysts, in which metallic nanoparticles, such as iron, are supported on silicon dioxide (silica) or other...

Phys.org 10d ago

Japan's new seafloor record could sharpen megathrust earthquake warnings in Nankai Trough

Japan's new seafloor record could sharpen megathrust earthquake warnings in Nankai Trough Sadie Harley Scientific Editor Robert Egan Associate Editor Off the southern coast of Japan, the Philippine Sea Plate lies underneath the Japanese mainland. The locked tectonic plates threaten to unleash a catastrophic megathrust earthquake, likely within the next few decades. Given the potential devastation a large quake could evoke, constant developments in predictive technology must be sought.

Phys.org 6d ago

Why sentiment in Japan has turned against foreigners despite a worker shortage

Anti-immigration sentiment rises in Japan despite growing demand for foreign workers Mon 8 Jun 2026 at 4:47am When Nikki Maruschak arrived in Japan in 2019 she saw it as a place where she could build a life. Today she finds herself feeling unwelcome. Walking to the train station, home, or just to the grocery store she has experienced an increase in "butsukari", where someone will intentionally bump into, or push, a person in a public space while walking.

ABC Australia 3d ago