Results 11 to 20 of about 10,962,229 (302)
Full-frequency GW without frequency [PDF]
The Journal of Chemical Physics, 2021 Efficient computer implementations of the GW approximation must approximate a numerically challenging frequency integral; the integral can be performed analytically, but doing so leads to an expensive implementation whose computational cost scales as O(N6), where N is the size of the system. Here, we introduce a new formulation of the full-frequency GW
Sylvia J. Bintrim, Timothy C. Berkelbach
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Chaos: An Interdisciplinary Journal of Nonlinear Science, 2016 We study the dynamics of coupled phase oscillators on a two-dimensional Kuramoto lattice with periodic boundary conditions. For coupling strengths just below the transition to global phase-locking, we find localized spatiotemporal patterns that we call “frequency spirals.” These patterns cannot be seen under time averaging; they become visible only ...
Bertrand Ottino-Löffler +1 more
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IEEE Transactions on Power Systems, 2016 Science Foundation ...
Milano, Federico, Ortega, Alvaro
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High frequency electronic ballast provides line frequency lamp current [PDF]
, 2001 Most electronic ballasts for fluorescent lamps provide a sinusoidal lamp current at the switching frequency. The high-frequency current flowing through the lamp can generate significant radiated noise, which is unacceptable in noise-sensitive ...
Santi, Enrico +2 more
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Photonic Sensors, 2023 Photodetectors operating at the wavelength in the visible spectrum are key components in high-performance optoelectronic systems. In this work, massive nonlinearities in amorphous silicon p-i-n photodiodes enabled by the photogating are presented ...
Andreas Bablich +4 more
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Photonics, 2023 This study experimentally demonstrates two types of ultra-broadband metamaterial absorbers with high performance in the visible-to-near-infrared range by using different anti-reflection coatings (i.e., SiO2 and Si3N4) and a multi-subcell Ti-SiO2-Ti ...
Dongqing Wu +4 more
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High-frequency Light Reflector via Low-frequency Light Control [PDF]
, 2015 We show that the momentum of light can be reversed via the atomic coherence created by another light with one or two orders of magnitude lower frequency.
Evers, Joerg +3 more
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Toward Applicable EEG-Based Drowsiness Detection Systems: A Review
Frontiers in Biomedical Technologies, 2022 Purpose: Drowsy driving accounts for many accidents and has attracted substantial research attention in recent years. Electroencephalography (EEG) signals are shown to be a reliable measure for the early detection of drowsiness.
Nasrin Sheibani Asl +3 more
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What makes low-frequency earthquakes low frequency?
Science Advances, 2023 Low-frequency earthquakes are repetitive seismic events that occur downdip of the seismogenic megathrust where slow aseismic fault slip dominates the tectonic budget. These tiny events, distinct from regular earthquakes, have the potential to provide in-situ constraints on the fault rheology where slow slip occurs, but are hard to study due to their ...
Qing-Yu Wang +4 more
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Investigation of Frequency Scanning Printed Bruce Array Antenna
IEEE Access, 2020 A printed edge-fed counterpart of wire Bruce array antenna, with open-stopband mitigation at broadside, is presented. The proposed antenna comprises of 11 meandered unit-cells periodically modulated in congruence with wire Bruce array antenna's theory ...
Zeeshan Ahmed +3 more
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