Search results for "Elementary theory"

showing 2 items of 2 documents

Eine Bemerkung zur Frage der Verwendung Lagrangescher Koordinaten in der Physik nichtlinearer Schwingungen

1958

For the Cartesian coordinates of the elements of a vibrating string, which are introduced as functions of time and a parameter (similar to the Lagrangean method in hydrodynamics), a general, non-linear system of differential equations is offered. The behaviour of the freely vibrating string corresponding to this system agrees, approximately, with the behaviour of a string put in motion in a certain way, which string, if moving freely, would act according to the linear differential equation of the elementary theory.

PharmacologyPhysicsDifferential equationMotion (geometry)Cell BiologyVibrating stringString (physics)law.inventionHigh Energy Physics::TheoryCellular and Molecular NeuroscienceClassical mechanicsSystem of differential equationsLinear differential equationlawMolecular MedicineElementary theoryCartesian coordinate systemMolecular BiologyExperientia
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Elementary theory and brief history

1991

In the history of the theory of deuteron photodisintegration one may distinguish roughly three periods: (i) the primitive period of the elementary theory using very simple wave functions and forces and considering lowest multipoles (E1, M1) only, (ii) the classical period still in the framework f conventional nuclear physics, but using realstic forces with correspondingly elaborate wave functions and considering also higher multipole transitions, (ii) the post-classic period with explicit treatment of subnuclear degrees of freedom like meson and isobar degrees of freedom and very recently quark-gluon degrees of freedom.

PhysicsTheoretical physicsMesonPhotodisintegrationSimple (abstract algebra)Nuclear TheoryDegrees of freedomIsobarElementary theoryNuclear ExperimentMultipole expansionWave function
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