Results 151 to 160 of about 1,750,116 (197)

SUPERRADIATION OF CLASSICAL OSCILLATORS AT CONSTANT PUMPING

Problems of Atomic Science and Technology, 2022
The dependence of the generation efficiency in the superradiance regime of an ensemble of oscillators on the pump energy input rate, as well as on the characteristics of the change in the pump phase, is studied. It is assumed that the pumping phase can vary both in time and in space.
Poklonskiy, E.V., Totkal, S.O.
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A CONSTANT FREQUENCY OSCILLATOR

Review of Scientific Instruments, 1930
The frequency of a vacuum tube oscillator depends not only upon the constants of the oscillating circuit but also upon those of the tube itself. In a tuned plate circuit, operating with minimum coupling the influence of the tube on frequency depends only on its plate resistance, and decreases as the plate resistance is increased.
Carl W. Miller, Howard L. Andrews
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Nonlinear oscillations in a constant gravitational field

Physica Scripta, 2022
Abstract Exploring non-linear oscillations is a challenging task since the related differential equations cannot be directly solved in terms of elementary functions. Thus, complicated mathematical or numerical methods are usually employed to find accurate or approximate expressions that describe the behavior of ...
S V Kontomaris, A Malamou
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Constant Frequency Oscillators*

Bell System Technical Journal, 1931
The manner in which the frequency of vacuum tube oscillators depends upon the operating voltages is discussed. The theory of the dependence is derived and is shown to indicate methods of causing the frequency to be independent of the operating voltages. These methods are applied in detail to the more commonly used oscillator circuits. Experimental data
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Quadratic Constants of the Motion for the Classical Harmonic Oscillator

American Journal of Physics, 1966
The four quadratic constants of the motion for the two dimensional classical harmonic oscillator are examined. Although all four are needed for closure under the operation of Poisson bracketing, the values of three determine the trajectories. A physical meaning and a method of measurement are obtained for the fourth COM, P = q1q2+p1p2, which is found ...
Bragg, L. E., Turner, L. R.
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Harmonic oscillator on a lattice in a constant force field and associated Bloch oscillations

Physical Review B, 1991
We obtain the eigenfunctions, eigenvalues, and typical wave-packet dynamics of a ``harmonic oscillator'' defined on a lattice, when subjected to an added constant force field \ensuremath{\alpha}. The eigenfunctions of this displaced harmonic oscillator are given in terms of Mathieu functions.
, Gallinar, , Chalbaud
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An Improvement in Constant-Frequency Oscillators

Proceedings of the IRE, 1939
A simple oscillator circuit is described in which, by means of impedance transformation, the tube impedances are made small relative to those of the tuned circuit. As a result all frequency variations inherent in the tube are reduced by a factor of ten, or more.
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Oscillating metrics and the cosmological constant

AIP Conference Proceedings, 2001
Oscillating metric solutions are found in theories with higher powers of curvature in the action. Their consideration is motivated by the cosmological constant problem.
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Noncommuting contractions of oscillators with constant force

Journal of Physics A: Mathematical and General, 2006
We find two noncommuting contractions of the Lie algebras u(N) and gl(N, ), realized as the symmetry algebras of N-dimensional isotropic harmonic and repulsive oscillators of spring constant k ∈ , with a constant force of magnitude f . The contraction limit to the symmetry algebra of the Ndimensional free system is (k, f ) → (0, 0). We take two paths
Jamil Daboul, Kurt Bernardo Wolf
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Constant modulus alloys for mechanical oscillators

Metallurgical Transactions A, 1979
A survey is given of the origins of constant modulus behavior in certain ferro- and antiferromagnetic alloys. All contributions to the modulus anomaly (ΔE) result from magnetic ordering. In the Fe-Ni system various influences are studied in detail; Ternary alloying elements, precipitation hardening process, cold reduction and final thermal treatment ...
Wolfgang Schneider, Hans Thomas
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