Results 271 to 280 of about 313,545 (301)
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A Coupled-Circuit Frequency Modulator
Proceedings of the IRE, 1944The circuit developed in this paper uses a condenser microphone to vary the reactance of an oscillator tank circuit. Using a coupled circuit and a tuning inductance across the condenser microphone, a single-tube wide-band frequency modulator was constructed for use on 40 megacycles.
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Cross-frequency coupling between neuronal oscillations
Trends in Cognitive Sciences, 2007Electrophysiological recordings in animals, including humans, are modulated by oscillatory activities in several frequency bands. Little is known about how oscillations in various frequency bands interact. Recent findings from the human neocortex show that the power of fast gamma oscillations (30-150Hz) is modulated by the phase of slower theta ...
Ole, Jensen, Laura L, Colgin
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Optical Frequency Mixing at Coupled Gold Nanoparticles
Physical Review Letters, 2007We present nonlinear-optical four-wave mixing (4WM) at coupled gold nanoparticles. By decreasing the interparticle distance from large separation to touching contact, the 4WM yield increases by 4 orders of magnitude. The reason for this dramatic enhancement lies in the shift of the localized plasmon resonance to infrared wavelengths as the dimer is ...
Matthias, Danckwerts, Lukas, Novotny
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Dynamics of the locomotor–respiratory coupling at different frequencies
Experimental Brain Research, 2015The locomotor-respiratory coupling (LRC) is a universal phenomenon reported for various forms of rhythmic exercise. In this study, we investigated the effect of movement and respiratory frequencies on LRC. Participants were instructed to cycle or breath in synchrony with a periodic auditory stimulation at preferred and non-preferred frequencies.
Hoffmann, Charles, Bardy, Benoit
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An Inductively Coupled Frequency Modulator
Proceedings of the IRE, 1941The frequency modulator described here allows the engineer to design a frequency-modulated oscillator that has more power output and will operate on a higher fundamental frequency than conventional modulators in use at present. It consists of an inductance, capacitance, and resistance in parallel coupled inductively to the frequency-controlling circuit
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Single-frequency coupled asymmetric microcavity laser
Optics Letters, 2008Single-mode lasing from a coupled asymmetric microcavity is achieved. By coupling two size mismatched circular microrings to form a coupled asymmetric microcavity, multi-whispering-gallery modes are successfully suppressed and single-frequency laser emission is robustly obtained.
Lei, Shang, Liying, Liu, Lei, Xu
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Oscillation and Cross-Frequency Coupling
2016Cerebral oscillation is a neurophysiological phenomenon related to cerebral rhythmic activity that reflects neural activity. It changes depending on oscillatory frequency, reflecting various brain functions including sensory, motor, and language functions. These oscillatory changes are used as decoding features of brain-machine interfaces. Recently, it
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Delay and Frequency Investigations in Coupled MLGNR Interconnects
2017Multilayer Graphene Nano-ribbons (MLGNRs) have been considered as a potential solution to replace conventional Cu for next-generation on-chip interconnects. In this paper, analytical models of transfer gain and crosstalk are derived for coupled three-line MLGNR interconnects using ABCD modeling approach. For this purpose, an equivalent single conductor
Manish Joshi +3 more
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Cross-frequency coupling in psychiatric disorders: A systematic review
Neuroscience and Biobehavioral Reviews, 2022Reza Zomorrodi +2 more
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