Low‐frequency behavior of coupled Josephson junctions near phase locking

1982 ◽  
Vol 41 (6) ◽  
pp. 566-568 ◽  
Author(s):  
A. K. Jain ◽  
K. K. Likharev ◽  
J. E. Lukens ◽  
J. E. Sauvageau
Keyword(s):  
Josephson Junctions ◽  
Phase Locking ◽  
Low Frequency ◽  
Frequency Behavior

Erratum: Low‐frequency behavior of coupled Josephson junctions near phase locking [Appl. Phys. Lett. 41, 566 (1982)]

1983 ◽  
Vol 42 (3) ◽  
pp. 305-305 ◽  
Author(s):  
A. K. Jain ◽  
K. K. Likharev ◽  
J. E. Lukens ◽  
J. E. Sauvageau
Keyword(s):  
Josephson Junctions ◽  
Phase Locking ◽  
Low Frequency ◽  
Frequency Behavior

Magnetic Permeability and Relaxation Frequency in High Frequency Magnetic Materials.

2001 ◽  
Vol 674 ◽  
Author(s):  
M.I. Rosales ◽  
H. Montiel ◽  
R. Valenzuela
Keyword(s):  
High Frequency ◽  
Domain Walls ◽  
Magnetocrystalline Anisotropy ◽  
Low Frequency ◽  
Frequency Dispersion ◽  
Anisotropy Constant ◽  
Relaxation Frequency ◽  
Resonance Relaxation ◽  
Frequency Behavior

ABSTRACTAn investigation of the frequency behavior of polycrystalline ferrites is presented. It is shown that the low frequency dispersion (f < 10 MHz) of permeability is associated with the bulging of pinned domain walls, and has a mixed resonance-relaxation character, closer to the latter. It is also shown that there is a linear relationship between the magnetocrystalline anisotropy constant, K1, and the relaxation frequency. The slope of this correlation depends on the grain size. Such a relationship could allow the determination of this basic parameter from polycrystalline samples.

Low-frequency critical current noise in Josephson junctions induced by temperature fluctuations

2012 ◽  
Vol 101 (9) ◽  
pp. 092601 ◽  
Author(s):  
S. M. Anton ◽  
C. D. Nugroho ◽  
J. S. Birenbaum ◽  
S. R. O’Kelley ◽  
V. Orlyanchik ◽  
...  
Keyword(s):  
Critical Current ◽  
Josephson Junctions ◽  
Low Frequency ◽  
Temperature Fluctuations ◽  
Current Noise

The investigation of the phase-locking stability in linear arrays of Josephson junctions and arrays closed into a superconducting loop

1994 ◽  
Vol 194-196 ◽  
pp. 1749-1750 ◽  
Author(s):  
M. Darula ◽  
P. Seidel ◽  
B. Mišánik ◽  
F. Busse ◽  
E. Heinz ◽  
...  
Keyword(s):  
Josephson Junctions ◽  
Phase Locking ◽  
Linear Arrays ◽  
Superconducting Loop

Inertia, Damping, and Wave Excitation of Heaving Coaxial Cylinders

2012 ◽  
Author(s):  
Fun Pang Chau ◽  
Ronald W. Yeung
Keyword(s):  
Low Frequency ◽  
Bottom Surface ◽  
Hydrodynamic Coefficients ◽  
Wave Excitation ◽  
Hydrodynamic Properties ◽  
Coaxial Cylinders ◽  
Ocean Wave Energy ◽  
Matched Eigenfunction Expansions ◽  
Frequency Behavior ◽  
Analytical Expressions

The method of matched eigenfunction expansions is applied in this paper to obtain the hydrodynamic coefficients of a pair of coaxial cylinders, each of which can have independent movement. The geometry idealizes a device for extracting ocean wave energy in the heave mode. The effects of geometric variations and the interaction between cylinders on the hydrodynamic properties are discussed. Analytical expressions for the low-frequency behavior of the hydrodynamic coefficients are also derived. The wave-exciting force on the bottom surface of either one of the cylinders is derived using the radiation solutions, with a generalized form of the Haskind relation developed for this geometry. The presented results are immediately applicable to examine free motion of coaxial cylinders in a wave field.

scholarly journals Signal-to-noise ratio in the membrane potential of the owl's auditory coincidence detectors

2012 ◽  
Vol 108 (10) ◽  
pp. 2837-2845 ◽  
Author(s):  
Go Ashida ◽  
Kazuo Funabiki ◽  
Paula T. Kuokkanen ◽  
Richard Kempter ◽  
Catherine E. Carr
Keyword(s):  
Neural Circuit ◽  
Signal To Noise Ratio ◽  
Phase Locking ◽  
Low Frequency ◽  
Membrane Potentials ◽  
Signal To Noise ◽  
Theoretical Predictions ◽  
Noise Ratio ◽  
Band Limited

Owls use interaural time differences (ITDs) to locate a sound source. They compute ITD in a specialized neural circuit that consists of axonal delay lines from the cochlear nucleus magnocellularis (NM) and coincidence detectors in the nucleus laminaris (NL). Recent physiological recordings have shown that tonal stimuli induce oscillatory membrane potentials in NL neurons (Funabiki K, Ashida G, Konishi M. J Neurosci 31: 15245–15256, 2011). The amplitude of these oscillations varies with ITD and is strongly correlated to the firing rate. The oscillation, termed the sound analog potential, has the same frequency as the stimulus tone and is presumed to originate from phase-locked synaptic inputs from NM fibers. To investigate how these oscillatory membrane potentials are generated, we applied recently developed signal-to-noise ratio (SNR) analysis techniques (Kuokkanen PT, Wagner H, Ashida G, Carr CE, Kempter R. J Neurophysiol 104: 2274–2290, 2010) to the intracellular waveforms obtained in vivo. Our theoretical prediction of the band-limited SNRs agreed with experimental data for mid- to high-frequency (>2 kHz) NL neurons. For low-frequency (≤2 kHz) NL neurons, however, measured SNRs were lower than theoretical predictions. These results suggest that the number of independent NM fibers converging onto each NL neuron and/or the population-averaged degree of phase-locking of the NM fibers could be significantly smaller in the low-frequency NL region than estimated for higher best-frequency NL.

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