Results 251 to 260 of about 6,778,426 (314)

Cross-frequency coupling and memory

Clinical Neurophysiology, 2016
According to an influential model, working memory (WM) depends on an interaction between neural oscillations of two different frequencies. This model assumes that individual items are represented by neural assemblies synchronized at high frequency. During maintenance of multiple items, these representations are reactivated during specific phases of ...
N. Axmacher, M. Leszczynski, J. Fell
openaire   +1 more source

Synchronizability of two neurons with switching in the coupling

Applied Mathematics and Computation, 2019
Time-varying networks are prominently present in the nervous system, where the connections between neurons vary according to the activity of pre and post synapses.
Fatemeh Parastesh, H. Azarnoush, S. Jafari, B. Hatef, M. Perc, R. Repnik   +5 more
semanticscholar   +1 more source

Borehole coupling at sonic frequencies

GEOPHYSICS, 1990
An elastic plane wave incident on a borehole couples through the borehole wall to produce a compressional wave inside the borehole, and the effect of this coupling varies with incident angle. Imaging experiments that include a downhole source and/or hydrophones must account for this effect to achieve optimal results. In configurations pertinent to VSP
J. R. Lovell, B. E. Hornby
openaire   +1 more source

Frequency of Sexual Dysfunction in “Normal” Couples

New England Journal of Medicine, 1978
In analyzing the responses of 100 predominantly white, well educated and happily married couples to a self-report questionnaire, this study examined the frequency of sexual problems experienced and the relations of those problems to sexual satisfaction. Although over 80 per cent of the couples reported that their marital and sexual relations were happy
E, Frank, C, Anderson, D, Rubinstein
openaire   +2 more sources

Capacitance-Coupled Intermediate-Frequency Amplifiers

Proceedings of the IRE, 1947
This paper discusses the performance characteristics of capacitance-coupled intermediate-frequency-amplifier circuits. Double-ended loading is preferred to single-ended loading in order to satisfy practical tolerance requirements. An approximate method is treated for the design of capacitance-coupled attenuating traps for a television intermediate ...
M.J. Larsen, L.L. Merrill
openaire   +1 more source

Capacitively coupled radio frequency discharges

AIP Conference Proceedings, 1996
A review is given of research carried out on capacitively coupled radio frequency discharges in the Department of Engineering Science at Oxford University.
openaire   +1 more source

Three-dimensional negative index of refraction at optical frequencies by coupling plasmonic waveguides.

Physical Review Letters, 2010
We identify a route towards achieving a negative index of refraction at optical frequencies based on coupling between plasmonic waveguides that support backwards waves.
E. Verhagen, R. de Waele, L. Kuipers, A. Polman   +3 more
semanticscholar   +1 more source

Radio-frequency coupling to plasmas

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1988
A survey of the physics associated with coupling rf power to plasmas is given with emphasis on methods of analysis relevant to applications in the fields of plasma production, processing, and fusion research. The significance of resonant versus nonresonant coupling methods is discussed and specific applications are described where these phenomena ...
openaire   +1 more source

Photorefractive pulse coupling in the frequency domain

Optics Letters, 1993
We performed experiments to verify the theory of photorefractive pulse coupling in the frequency domain. In particular, we confirm that the phase added to the diffracted pulse depends quadratically on the relative delay between the two input pulses.
X S, Yao, J, Feinberg
openaire   +2 more sources

Frequency Enhancement in Coupled Noisy Excitable Elements

Physical Review Letters, 2011
Oscillatory dynamics of coupled excitable FitzHugh-Nagumo elements in the presence of noise is investigated as a function of the coupling strength g. For two such coupled elements, their frequencies are enhanced and will synchronize at a frequency higher than the uncoupled frequencies of each element.
Wei-Yin, Chiang, Pik-Yin, Lai, C K, Chan
openaire   +2 more sources