Using density functional perturbation theory, we computed the phonon frequencies and Raman and IR activities of hafnia polymorphs (P4(2)nmc, Pca2(1), Pmn2(1), Pbca OI, brookite, and baddeleyite) for ...

With our eyes, we see the world in visible light. Although visible light makes up only a small part of the radiation spectrum, the invisible light covers most of the remaining spectral range. The ...

It’s long been accepted that the smoother the surface, the lower the aerodynamic drag. That turns out not always to be the case. Aerodynamic drag is a major “barrier” in high-speed airplanes, ...

Raman, NIR, and UV-VIS spectroscopy are the three main methods used in this field. All three fall within the broader categories of vibrational and electronic spectroscopy, but they differ ...

Abstract: The Heterodyne Spectroscopy Instrument (HSI) is a focal plane array receiver (FPA) for the Far-IR Spectroscopy Space Telescope (FIRSST), a proposal submitted to NASA's APEX call. Though ...

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As Americans struggle with the high cost of living, an old idea is getting a fresh look. In dozens of pilot programs around the country, policymakers and researchers are exploring what happens when ...

Microsoft open-sourced the MS-BASIC language. Bill Gates would never have seen this coming back in the day. MS-BASIC 1.1 was many developers' first language. In 1976, they rebranded Altair BASIC to ...

When it comes to the best infrared hair straighteners and other hairstyling tools, there’s a lot of buzz around what exactly this so-called “revolutionary” infrared technology is. And as with many ...

The combination of machine learning with spectroscopy has made sound progress in recognizing chemical substances in recent years. However, challenges remain in terms of cross-system generalization. It ...