Results 261 to 270 of about 6,175 (306)

Coherence condition for resonant neutrino oscillation

Physical Review D, 1990
which holds the key for matter oscillation has not been mentioned in relation to the MSW effect until now. We study the coherence condition for a neutrino to keep coherence between the effective mass eigenstates in the presence of matter and, according to this condition, investigate whether or not the MSW effect happens in the cases of solar and ...
, Anada, , Nishimura
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Plate oscillations with mixed boundary conditions

Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika, 2023
The problem with initial conditions for the equation of vibrations of a rectangular plate with mixed boundary conditions was examined by the author of this study. It is determined that there is an energy inequality, which implies that the solution to the given initial-boundary problem is unique.
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Hippocampal Theta Oscillations and Classical Conditioning

Neurobiology of Learning and Memory, 2001
Studies are reviewed that support a hypothesized role for hippocampal theta oscillations in the neural plasticity underlying behavioral learning. Begun in Richard F. Thompson's laboratory in the 1970s, these experiments have documented a relationship between free-running 3- to 7-Hz hippocampal slow waves (theta) and rates of acquisition in rabbit ...
S D, Berry, M A, Seager
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Conditions for auto-oscillations in nonlinear systems

Siberian Mathematical Journal, 1989
The authors derive the conditions of auto-oscillations of \(\sigma\) (t) in the system \(dx/dt=Ax+b\xi,\) \(\sigma =c^*x\), \(\xi =\phi (\sigma)\), where A, b, c are real constant matrices, \(x\in {\mathbb{R}}^ n\), \(\sigma \in {\mathbb{R}}^{\ell}\), \(\xi \in {\mathbb{R}}^ m\), \(c^*\) is the conjugate matrix to c, \(\phi \in C^ 1\) is a nonlinear ...
Tomberg, Eh. A., Yakubovich, V. A.
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Multiple modes of a conditional neural oscillator

Biological Cybernetics, 1990
We present a model for a conditional bursting neuron consisting of five conductances: Hodgkin-Huxley type time- and voltage-dependent Na+ and K+ conductances, a calcium activated voltage-dependent K+ conductance, a calcium-inhibited time- and voltage-dependent Ca++ conductance, and a leakage Cl- conductance. With an initial set of parameters (version S)
I R, Epstein, E, Marder
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Oscillation conditions of A FIR waveguide laser

International Journal of Infrared and Millimeter Waves, 1983
Abstract The oscillation conditions of an FIR waveguide laser are studied. The conditions take into account the waveguide characteristics and coupling features. The results are used to determine the threshold of the laser and the effect of each dimension on the output power.
D. Pasquet, J.L. Gautier, P. Pouvil
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SUFFICIENT CONDITIONS FOR OSCILLATION OF THE LIÉNARD EQUATION

Chinese Annals of Mathematics, 2000
Sufficient conditions for the oscillation of all solutions to the generalized Liénard equation \[ \dot{x}=h(y)-F(x),\quad \dot{y}=-g(x), \tag{*} \] with \(F(0)=0\), \(yh(y)>0\), \(xg(x)>0\) for \(x,y\neq 0\), \(h(y)\) is strictly increasing, \(\lim_{y\to \pm\infty}h(y)=\pm \infty\) and \(\lim_{|x|\to \infty}G(x)=\infty\), with \(G(x)=\int_0^x g(s) ds\).
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Sharp conditions for oscillation

Acta Mathematicae Applicatae Sinica, 1993
The paper deals with the equation (1) \(x'(t)+ \sum_{i=1}^ n p_ i(t) x(t-\tau_ i(t))=0\), where \(0\leq p_ i(t)\leq p\), \(0\leq \tau_ i(t)\leq T\) for \(i=1,2,\dots,n\); \(p\) and \(T\) are constants and \(p_ i(t)\), \(\tau_ i(t)\) are continuous functions on \([0,\infty)\).
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Necessary and sufficient conditions for robust oscillation

International Journal of Systems Science, 1996
Consider the n th-order difference equation and the differential equation where In this paper we establish the concept that (1) and (2) are robustly oscillatory (i.e. (1) or (2) is oscillatory for all Necessary and sufficient conditions are given by the oscillation of special extreme point equations.
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Start-oscillation conditions in nonuniform backward-wave oscillators

IEEE Transactions on Electron Devices, 1964
The effects of nonuniformities in the circuit phase velocity and the beam potential on the start-oscillation conditions of an O-type backward-wave oscillator (BWO) are investigated. The nonuniformities include linear, quadratic, and exponential circuit phase velocity tapers and beam potential gradients.
G.I. Haddad, J.E. Rowe
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