Medical dictionary. 2011.
Young–Helmholtz theory — The Young–Helmholtz theory (proposed in the 19th century by Thomas Young and Hermann von Helmholtz) is a theory of trichromatic color vision – the manner in which the photoreceptors in the eyes of humans and other primates work to enable color… … Wikipedia
Young-Helmholtz theory — Young Helm·holtz theory yəŋ helm .hōlts n a theory in color vision: the eye has three separate elements each of which is stimulated by a different primary color Young Thomas (1773 1829) British physician, physicist, and Egyptologist. Young is… … Medical dictionary
young-helmholtz theory — ˈyəŋˈhel]mˌhōlts, ˈheu̇] noun Usage: usually capitalized Y&H Etymology: Thomas Young died 1829 English physician and physicist and Hermann L. F. von Helmholtz died 1894 German physicist : a theory in color vision: the eye has three separate… … Useful english dictionary
Helmholtz, Hermann von — ▪ German scientist and philosopher Introduction original name Hermann Ludwig Ferdinand Helmholtz born Aug. 31, 1821, Potsdam, Prussia [Germany] died Sept. 8, 1894, Charlottenburg, Berlin, Ger. German scientist and philosopher who made… … Universalium
theory — A reasoned explanation of known facts or phenomena that serves as a basis of investigation by which to seek the truth. SEE ALSO: hypothesis, postulate. [G. theoria, a beholding, speculation, t., fr. theoros, a beholder] adsorption t. of narcosis… … Medical dictionary
Helmholtz free energy — In thermodynamics, the Helmholtz free energy is a thermodynamic potential which measures the “useful” work obtainable from a closed thermodynamic system at a constant temperature and volume. For such a system, the negative of the difference in… … Wikipedia
Helmholtz pitch notation — The naming of individual C s using the Helmholtz system Helmholtz pitch notation is a musical system for naming notes of the Western chromatic scale. Developed by the German scientist Hermann von Helmholtz, it uses a combination of upper and… … Wikipedia
Helmholtz decomposition — In mathematics, in the area of vector calculus, Helmholtz s theorem, also known as the fundamental theorem of vector calculus, states that any sufficiently smooth, rapidly decaying vector field can be resolved into irrotational (curl free) and… … Wikipedia
Helmholtz , Hermann Ludwig Ferdinand von — (1821–1894) German physiologist and theoretical physicist Born in Potsdam, Germany, Helmholtz studied medicine at the Friedrich Wilhelm Institute in Berlin and obtained his MD in 1842. He returned to Potsdam to become an army surgeon, but… … Scientists
Helmholtz-Zerlegung — Das Helmholtz Theorem (auch Helmholtz Zerlegung) ist nach Hermann von Helmholtz benannt. Es besagt, dass für gewisse Gebiete der Lp Raum als direkte Summe von divergenzfreien Funktionen und Gradientenfeldern geschrieben werden kann.… … Deutsch Wikipedia
