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Meissner, and is derived from late Latin root ( which, in turn, comes from the Arabic al-qalwī – " ashes of plants ") and the suffix – " like ".
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Meissner and is
The demonstration that the phase transition is second order, that it reproduces the Meissner effect and the calculations of specific heats and penetration depths appeared in the December 1957 article, " Theory of superconductivity ".
It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state.
During the standards committee battle over whether the " minimum trip count " for the FORTRAN 77 < CODE > DO </ CODE > statement should be zero ( allowing no execution of the block ) or one ( the " plunge-ahead " < CODE > DO </ CODE >), another facetious alternative was proposed ( by Loren Meissner ) to have the minimum trip be two — since there is no need for a loop if it is only executed once.
It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state.
The Meissner effect is sometimes confused with the kind of diamagnetism one would expect in a perfect electrical conductor: according to Lenz's law, when a changing magnetic field is applied to a conductor, it will induce an electric current in the conductor that creates an opposing magnetic field.
The Meissner effect is distinct from this — it is the spontaneous expulsion which occurs during transition to superconductivity.
The Meissner effect was given a phenomenological explanation by the brothers Fritz and Heinz London, who showed that the electromagnetic free energy in a superconductor is minimized provided
A major triumph of the equations of this theory is their ability to explain the Meissner effect, wherein a material exponentially expels all internal magnetic fields as it crosses the superconducting threshold.
The Meissner effect is an expulsion of a magnetic field from a superconductor during its transition to the superconducting state.
The Meissner effect is distinct from this: when an ordinary conductor is cooled so that it makes the transition to a superconducting state in the presence of a constant applied magnetic field, the magnetic flux is expelled during the transition.
It should thus be noted that the placement and subsequent levitation of a magnet above an already superconducting material does not demonstrate the Meissner effect, while an initially stationary magnet later being repelled by a superconductor as it is cooled through its critical temperature does.
Superconductors in the Meissner state exhibit perfect diamagnetism, or superdiamagnetism, meaning that the total magnetic field is very close to zero deep inside them ( many penetration depths from the surface ).
The Meissner effect of superconductivity serves as an important paradigm for the generation mechanism of a mass M ( i. e. a reciprocal range, where h is Planck constant and c is speed of light ) for a gauge field.
Superconductors are a subclass of perfect conductors in that they also exhibit the Meissner Effect, an inherently quantum mechanical phenomenon that is responsible for expelling any magnetic field lines present during the superconducting transition, thus making the magnetic field zero in the bulk of the superconductor.
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* BCS theory correctly predicts the Meissner effect, i. e. the expulsion of a magnetic field from the superconductor and the variation of the penetration depth ( the extent of the screening currents flowing below the metal's surface ) with temperature.
In superconductors the illusion of perfect diamagnetism arises from persistent screening currents which flow to oppose the applied field ( the Meissner effect ); not solely the orbital spin.
This was done successfully by the BCS theory in 1957, from which the penetration depth and the Meissner effect result.
Image: Tin_80gauss_1. 6K. jpg | The cylinder has been cooled from 4. 2 K to 1. 6 K. The current in the electromagnet has been kept constant, but the tin became superconducting at about 3 K. Magnetic flux has been expelled from the cylinder ( the Meissner effect ).
Meissner claims that Stumpfegger refused to take any part in the deaths of the children, and that a mysterious " country doctor from the enemy-occupied eastern region " appeared and " carried out the fearful task " before disappearing again.
The Meissner effect says that a superconducting metal will try to expel magnetic field lines from its interior.
* E. Epelbaum, A. Nogga, W. Glöckle, H. Kamada, Ulf-G. Meissner, and H. Witala, " Three-nucleon forces from chiral effective field theory ", Phys.
The son of a postal official, Meissner studied law in Strasbourg from 1898 to 1903, where he also became a member of the Strassburg Student Youth Fraternity ( Burschenschaft ) Germania.
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Meissner, on the contrary, makes no suggestion of this, claiming rather that Hitler ( though undoubtedly impressed by Magda ) was an exceptionally close friend of the couple in the earliest days, who would often arrive late at night and was as likely as Goebbels to sit with the baby Helga on his lap while they talked into the night.
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The next important step in understanding superconductivity occurred in 1933, when Meissner and Ochsenfeld discovered that superconductors expelled applied magnetic fields, a phenomenon which has come to be known as the Meissner effect.
There are numerous other closed convex surfaces which have constant width, for example the Meissner body.
In 1908, Stephen Langdon summarized the rapid expansion in knowledge of Sumerian and Akkadian vocabulary in the pages of Babyloniaca, a journal edited by Charles Virolleaud, in an article ' Sumerian-Assyrian Vocabularies ', which reviewed a valuable new book on rare logograms by Bruno Meissner.
The primary sensory receptors for touch / position ( Meissner ’ s corpuscles, Merkel's receptors, Pacinian corpuscles, Ruffini ’ s corpuscles, hair receptors, muscle spindle organs, and Golgi tendon organs ) are structurally more complex than the primitive receptors for pain / temperature, which are bare nerve endings.
The Armstrong oscillator ( also known as the Meissner oscillator ) is an electronic oscillator circuit which uses an inductor and capacitor to determine the oscillation frequency ; an LC oscillator.
In 2007, Wynonna starred in a special television event on NBC honoring her 23 year career titled " Wynonna: A Tribute on Ice ", which featured skating champions such as Kimmie Meissner and Brian Boitano.
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The phenomenon cannot occur in Type I superconductors, since these cannot be penetrated by magnetic fields ( Meissner – Ochsenfeld effect ).
Along with Rudolph Wagner ( 1805 – 1864 ) and Georg Meissner ( 1829 – 1905 ), Billroth went to Trieste to study the torpedo fish.
* Alfréd Meissner ( 1871 – 1950 ), law theorist, leader of the Social Democratic Party, justice minister and minister of social welfare in the 1st Czechoslovak republic, deputy Jewish Elder in the Theresienstadt ( Terezín ) ghetto in 1944 to 1945
Fritz Walther Meissner ( German: Meißner ) ( December 16, 1882, Berlin – November 16, 1974, Munich ) was a German technical physicist.
Georg Meissner ( November 19, 1829 – March 30, 1905 ) was a German anatomist and physiologist born in Hanover.
* James Meissner ( 1896 – 1936 ), World War I flying, recipient of two Distinguished Service Crosses.
Otto Lebrecht Eduard Meissner ( 13 March 1880, Bischwiller, Alsace – 27 May 1953, Munich ) was head of the Office of the President of Germany during the entire period of the Weimar Republic under Friedrich Ebert and Paul von Hindenburg and, finally, at the beginning of the Nazi era under Adolf Hitler.
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