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Discretization of frequencies in delay coupled oscillators
Physical Review E, 2005We study the dynamics of two mutually coupled chaotic oscillators with a time delayed coupling. Due to the delay, the allowed frequencies of the oscillators are shown to be discretized. The phenomenon is observed in the case when the delay is much larger than the characteristic period of the solitary uncoupled oscillator.
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Cross-frequency coupling and memory
Clinical Neurophysiology, 2016According 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
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Cross-Frequency Coupling in Childhood Absence Epilepsy
Brain Connectivity, 2022Objective: Absence seizures are the prototypic primarily generalized seizures, but there is incomplete understanding regarding their generation and maintenance. A core network for absence seizures has been defined, including focal cortical and thalamic regions that have frequency-dependent interactions.
Jeffrey R. Tenney +2 more
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Optimum Coupling for Random Guides with Frequency-Dependent Coupling
IEEE Transactions on Microwave Theory and Techniques, 1972We obtain exactly the covariance of the signal-signal and signal-spurious mode transfer functions of the coupled line equations with two forward-traveling modes, white random coupling with statistically independent successive values (e.g., white Gaussian or Poisson coupling), and a coupling coefficient that varies with the frequency of the signals on ...
D.T. Young, H.E. Rowe
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Frequency locking in weakly coupled lasers
Optics Letters, 1985An important question concerning coupled lasers is the range of optical-resonator length fluctuations over which frequency locking occurs. In this Letter, an analytical expression for the lock band is derived.
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Coupled voltage and frequency control for DVFS management
2013 23rd International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS), 2013During the last decade, Dynamic Voltage-Frequency Scaling (DVFS) techniques have been widely proposed to improve integrated circuit efficiency. When these mechanisms are composed of independent actuators for supply voltage and clock frequency, a predefined sequence has to be used to switch from one state to another one in order to avoid undesirable ...
Maurício Altieri +3 more
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Frequency Enhancement in Coupled Noisy Excitable Elements
Physical Review Letters, 2011Oscillatory 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
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Increased micronuclei frequencies in couples with reproductive failure
Reproductive Toxicology, 2000A higher incidence of chromosomal instability in the infertile population is widely recognized. An increased level of micronuclei has been shown to be a marker of chromosome damage. Therefore, micronuclei frequencies were assessed in cytokinesis-blocked lymphocytes of 130 patients (65 couples) with idiopathic infertility or with two or more spontaneous
M, Trková +4 more
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Radio-frequency coupling to plasmas
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1988A 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 ...
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Simulating autonomous coupling in discrimination of light frequencies
Connection Science, 2004To study the interfacial complexity between an agent and its environment such as the adaptive selection aspects of sensory inputs, we propose a new coupling mechanism, called autonomous coupling, where an agent can spontaneously switch on or off its interaction with the environment. An oscillatory neural system with autonomous coupling sums the sensory
Hiroyuki Iizuka, Takashi Ikegami
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