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The global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances are the principal background in the part of the electromagnetic spectrum [2] from 3 Hz through 60 Hz [3] and appear as distinct peaks at extremely low frequencies around 7.83 Hz (fundamental), 14.3, 20.8, 27.3, and 33.8 Hz.
Winfried Otto Schumann (May 20, 1888 – September 22, 1974) was a German physicist and electrical engineer who predicted the Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.
The fundamental Schumann resonance is at approximately 7.83 Hz, the frequency at which the wavelength equals the circumference of the Earth, and higher harmonics occur at 14.1, 20.3, 26.4, and 32.4 Hz, etc. Lightning strikes excite these resonances, causing the Earth–ionosphere cavity to "ring" like a bell, resulting in a peak in the noise ...
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Backbone-dependent rotamer library for serine.Each plot shows the population of the χ 1 rotamers of serine as a function of the backbone dihedral angles φ and ψ. In biochemistry, a backbone-dependent rotamer library provides the frequencies, mean dihedral angles, and standard deviations of the discrete conformations (known as rotamers) of the amino acid side chains in proteins as a function ...
Robert Schumann's Introduction and Concert Allegro (German: Konzert-Allegro mit Introduktion) in D minor for piano and orchestra, Op. 134, was one of his last works. Composed in 1853, Schumann gave the autograph score to his wife, Clara Schumann, as a birthday gift; she would give the first performance on 26 November. [1]
From 2007 to 2015, the IMSLP / Petrucci Music Library used a logo based on a score. The score image in the background was taken from the beginning of the first printed book of music, the Harmonice Musices Odhecaton. It was published in Venice, Italy in 1501 by Ottaviano Petrucci, the library's namesake. [5] [non-primary source needed]