Nuclear magnetic resonance (NMR) spectroscopy is a technique that detects the chemical environment of atomic nuclei by the absorption of radio-frequency electromagnetic radiation when in the ...

New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

It is common in computer vision and medicine using, for example, serial sections generated by computed tomography (CT), electron microscopy or magnetic resonance imaging (MRI). Optical aberrations ...