A principal advantage of HD over SD video is the ability to view larger images from closer distances. The design goal for HDTV was to facilitate viewing at a distance of three picture heights from the ...

When it comes to high-resolution mass spectrometry, Fourier transform ion cyclotron resonance used to be the only game in town. FTICR MS still has the highest resolving power of all MS techniques, but ...

IN a recent paper 1 I derived formulæ expressing the distribution of light in the geometrical focal plane of optical systems of high relative aperture; and, using these formulæ, curves were given ...

IN scientific writings the term “definition” most often refers to the clearness with which details are shown by optical instruments; but by a convenient generalisation it might be taken to mean the ...