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  2. High-availability Seamless Redundancy - Wikipedia

    en.wikipedia.org/wiki/High-availability_Seamless...

    An HSR network node (DANH) has at least two Ethernet ports, each attached to a neighbour HSR node, so that always two paths exist between two nodes. Therefore, as long as one path is operational, the destination application always receives one frame. HSR nodes check the redundancy continuously to detect lurking failures.

  3. Ferroresonance in electricity networks - Wikipedia

    en.wikipedia.org/wiki/Ferroresonance_in...

    Ferroresonance or nonlinear resonance is a rare [1] type of resonance in electric circuits which occurs when a circuit containing a nonlinear inductance is fed from a source that has series capacitance, and the circuit is subjected to a disturbance such as opening of a switch. [2]

  4. Shape resonance - Wikipedia

    en.wikipedia.org/wiki/Shape_resonance

    In quantum mechanics, a shape resonance is a metastable state in which an electron is trapped due to the shape of a potential barrier. [1] Altunata [ 2 ] describes a state as being a shape resonance if, "the internal state of the system remains unchanged upon disintegration of the quasi- bound level."

  5. Ramsauer–Townsend effect - Wikipedia

    en.wikipedia.org/wiki/Ramsauer–Townsend_effect

    The probability of scattering in such a system is defined as the number of electrons scattered, per unit electron current, per unit path length, per unit pressure at 0 °C, per unit solid angle. The number of collisions equals the total number of electrons scattered elastically and inelastically in all angles, and the probability of collision ...

  6. Quadrupole ion trap - Wikipedia

    en.wikipedia.org/wiki/Quadrupole_ion_trap

    Charged flour grains caught in a quadrupole ion trap. A charged particle, such as an atomic or molecular ion, feels a force from an electric field.It is not possible to create a static configuration of electric fields that traps the charged particle in all three directions (this restriction is known as Earnshaw's theorem).

  7. Triple-resonance nuclear magnetic resonance spectroscopy

    en.wikipedia.org/wiki/Triple-resonance_nuclear...

    Triple resonance experiments are a set of multi-dimensional nuclear magnetic resonance spectroscopy (NMR) experiments that link three types of atomic nuclei, most typically consisting of 1 H, 15 N and 13 C. These experiments are often used to assign specific resonance signals to specific atoms in an isotopically-enriched protein.

  8. Dual resonance model - Wikipedia

    en.wikipedia.org/wiki/Dual_resonance_model

    The study of dual resonance models was a relatively popular subject of study between 1968 and 1973. [5] It was even taught briefly as a graduate level course at MIT, by Sergio Fubini and Veneziano, who co-authored an early article. [ 6 ]

  9. K-line (x-ray) - Wikipedia

    en.wikipedia.org/wiki/K-line_(x-ray)

    [1] The study teams observed X-ray emissions from the "broad iron K line" near the event horizon of several super-massive black holes of galaxies called MCG-6-30-15 and MCG-5-23-16. The normally narrow K-line is broadened by the doppler shift ( red shift or blue shift ) of the X-ray light emitted by matter being affected by the gravity of the ...