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Ernst Julius Richard Ewald (14 February 1855 – 22 July 1921) was a German physiologist born in Berlin. He was a younger brother to gastroenterologist Carl Anton Ewald (1845–1915). In 1880, after finishing his studies in mathematics, physics and medicine, he became an assistant to physiologist Friedrich Goltz (1834-1902) at the University of Strasbourg. In 1900 he succeeded Goltz as chair of physiology at Strasbourg, a position he maintained until 1918.

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  • إرنست يوليوس ريتشارد إيفال (ar)
  • Ernst Julius Richard Ewald (de)
  • Ernst Julius Richard Ewald (en)
  • Ernst Julius Richard Ewald (pl)
  • Ernst Julius Richard Ewald (sv)
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  • إرنست يوليوس ريتشارد إيفال (بالألمانية: Ernst Julius Richard Ewald)‏ هو عالم وظائف الأعضاء ألماني، ولد في 14 فبراير 1855 في برلين في ألمانيا، وتوفي في 22 يوليو 1921 في كونستانس في ألمانيا. (ar)
  • Ernst Julius Richard Ewald (* 14. Februar 1855 in Berlin; † 22. Juli 1921 in Konstanz) war ein deutscher Physiologe. Ewald war ab 1892 Mitglied der Leopoldina und ab 1900 Professor in Straßburg. Er arbeitete auf den Gebieten der Atmungs- und Kreislaufphysiologie. 1899 begründete er die Schallbildertheorie des Hörens. Sein Bruder ist der Internist Carl Anton Ewald. (de)
  • Ernst Julius Richard Ewald (ur. 14 lutego 1855 w Berlinie, zm. 22 lipca 1921 w Konstancji) – niemiecki fizjolog. Od 1900 profesor na . Zajmował się fizjologią krążenia i oddychania. W 1899 sformułował własną teorię słyszenia (Schallbildertheorie). Jego bratem był internista Carl Anton Ewald. (pl)
  • Ernst Julius Richard Ewald, född 14 februari 1855 i Berlin, död 22 juli 1921 i Konstanz, var en tysk fysiolog; bror till Carl Anton Ewald. Ewald blev 1880 medicine doktor, 1883 docent i Strassburg samt 1886 extra ordinarie och 1900 ordinarie professor i fysiologi där. Genom sina med sällsport fin teknik utförda undersökningar över innerörat (Physiologische Untersuchungen über das Endorgan des Nervus octavus, 1892) bidrog han i mycket betydande grad till utredning av detta organs förrättningar, varjämte han i den av honom utvecklade teorin för hörselförnimmelserna (1899) på ett skickligt sätt undvek flera av de svårigheter, som mötte den av Hermann von Helmholtz uppställda resonatorteorin. (sv)
  • Ernst Julius Richard Ewald (14 February 1855 – 22 July 1921) was a German physiologist born in Berlin. He was a younger brother to gastroenterologist Carl Anton Ewald (1845–1915). In 1880, after finishing his studies in mathematics, physics and medicine, he became an assistant to physiologist Friedrich Goltz (1834-1902) at the University of Strasbourg. In 1900 he succeeded Goltz as chair of physiology at Strasbourg, a position he maintained until 1918. (en)
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  • إرنست يوليوس ريتشارد إيفال (بالألمانية: Ernst Julius Richard Ewald)‏ هو عالم وظائف الأعضاء ألماني، ولد في 14 فبراير 1855 في برلين في ألمانيا، وتوفي في 22 يوليو 1921 في كونستانس في ألمانيا. (ar)
  • Ernst Julius Richard Ewald (* 14. Februar 1855 in Berlin; † 22. Juli 1921 in Konstanz) war ein deutscher Physiologe. Ewald war ab 1892 Mitglied der Leopoldina und ab 1900 Professor in Straßburg. Er arbeitete auf den Gebieten der Atmungs- und Kreislaufphysiologie. 1899 begründete er die Schallbildertheorie des Hörens. Sein Bruder ist der Internist Carl Anton Ewald. (de)
  • Ernst Julius Richard Ewald (14 February 1855 – 22 July 1921) was a German physiologist born in Berlin. He was a younger brother to gastroenterologist Carl Anton Ewald (1845–1915). In 1880, after finishing his studies in mathematics, physics and medicine, he became an assistant to physiologist Friedrich Goltz (1834-1902) at the University of Strasbourg. In 1900 he succeeded Goltz as chair of physiology at Strasbourg, a position he maintained until 1918. Ewald is best remembered for his research of the vestibular system of the inner ear, which largely involved experiments performed on the semicircular canal system of pigeons. From these studies the so-called "Ewald laws" are derived, which deal with the effects of endolymph motion on body, head and eye movements and also on the phenomena of excitation-inhibition asymmetries in the vestibular system. * Ewald's first law: "The axis of nystagmus parallels the anatomic axis of the semicircular canal that generated it". * Ewald's second law: "Ampullopetal endolymphatic flow produces a stronger response than ampullofugal flow in the horizontal canal". * Ewald's third law: "Ampullofugal flow produces a stronger response than ampullpetal flow in the . In 1892 he was given an award by the Paris Academy of Sciences for his monograph "Physiologische Untersuchungen über das Endorgan des Nervus octavus". (en)
  • Ernst Julius Richard Ewald (ur. 14 lutego 1855 w Berlinie, zm. 22 lipca 1921 w Konstancji) – niemiecki fizjolog. Od 1900 profesor na . Zajmował się fizjologią krążenia i oddychania. W 1899 sformułował własną teorię słyszenia (Schallbildertheorie). Jego bratem był internista Carl Anton Ewald. (pl)
  • Ernst Julius Richard Ewald, född 14 februari 1855 i Berlin, död 22 juli 1921 i Konstanz, var en tysk fysiolog; bror till Carl Anton Ewald. Ewald blev 1880 medicine doktor, 1883 docent i Strassburg samt 1886 extra ordinarie och 1900 ordinarie professor i fysiologi där. Genom sina med sällsport fin teknik utförda undersökningar över innerörat (Physiologische Untersuchungen über das Endorgan des Nervus octavus, 1892) bidrog han i mycket betydande grad till utredning av detta organs förrättningar, varjämte han i den av honom utvecklade teorin för hörselförnimmelserna (1899) på ett skickligt sätt undvek flera av de svårigheter, som mötte den av Hermann von Helmholtz uppställda resonatorteorin. (sv)
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