Metasurface performance: A schematic diagram of the proposed metasurface spectrometer based on a wavelength dependent multi-foci metalens model. (Courtesy: Ruoxing Wang, Muhammad Afnan Ansari, Hammad ...
Present day oil analysis is done by using optical emission spectroscopy (OES) to measure the ppm (parts per million) levels of wear metals, contaminants and additives in oil samples. This paper ...
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