Results 31 to 40 of about 452,637 (291)
Low-frequency oscillations in narrow vibrated granular systems
New Journal of Physics, 2013 We present simulations and a theoretical treatment of vertically vibrated granular media. The systems considered are confined in narrow quasi-two-dimensional and quasi-one-dimensional (column) geometries, where the vertical extension of the container is ...
N Rivas, S Luding, A R Thornton
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Power System Stabilizer PSS4B Model for Iraqi National Grid using PSS/E Software
Journal of Engineering, 2018 To damp the low-frequency oscillations which occurred due to the disturbances in the electrical power system, the generators are equipped with Power System Stabilizer (PSS) that provide supplementary feedback stabilizing signals.
Hanan Mikhael Habbi, Ahmed Alhamadani
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A Precessing Ring Model for Low-Frequency Quasi-periodic Oscillations [PDF]
, 2005 We develop a simple physical model to describe the most common type of low-frequency quasi-periodic oscillations (QPOs) seen in a number of accreting black hole systems, as well as the shape of the relativistically broadened iron emission lines that ...
Homan, Jeroen +2 more
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Short Meditation Trainings Enhance Non-REM Sleep Low-Frequency Oscillations. [PDF]
PLoS ONE, 2016 STUDY OBJECTIVES:We have recently shown higher parietal-occipital EEG gamma activity during sleep in long-term meditators compared to meditation-naive individuals.
Daniela Dentico +7 more
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Nonergodic Brownian oscillator: low-frequency response
Journal of Statistical Mechanics: Theory and Experiment, 2023 Abstract An undisturbed Brownian oscillator may not reach thermal equilibrium with the thermal bath due to the formation of a localized normal mode. The latter may emerge when the spectrum of the thermal bath has a finite upper bound ω 0 and the oscillator natural frequency exceeds a critical value
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Low frequency longitudinal relaxation oscillation [PDF]
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268), 2002 From the recent data analysis of the longitudinal feedback system and the streak camera, we have found a longitudinal relaxation beam oscillation whose frequency is a multiple of 36 Hz. When the relaxation oscillation is generated, horizontally oscillating wide beams are observed at the diagnostic beamline, and the beam lifetime is fluctuated.
null Yujong Kim +11 more
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Seismic sensitivity to sub-surface solar activity from 18 years of GOLF/SoHO observations [PDF]
, 2015 Solar activity has significantly changed over the last two Schwabe cycles. After a long and deep minimum at the end of Cycle 23, the weaker activity of Cycle 24 contrasts with the previous cycles.
Garcia, R. A. +2 more
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Low Frequency Oscillations Suppression via CPSO based Damping Controller [PDF]
Journal of Operation and Automation in Power Engineering, 2007 In this paper, the Unified Power Flow Controller (UPFC) is enhanced with a Chaotic Particle Swarm Optimization (CPSO) Damping Controller in order to mitigate the Low Frequency Oscillations (LFO) in a Single Machine Infinite Bus (SMIB) power system.
N. Bigdeli, E. Ghanbaryan, K. Afshar
doaj
A Low Frequency Oscillator [PDF]
Nature, 1925 IT may be of interest to readers of NATURE who are working with low frequency to know of a new form of oscillator.
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Trapped, Two-Armed, Nearly Vertical Oscillations in Polytropic Disks
, 2010 We have examined trapping of two-armed nearly vertical oscillations in polytropic disks. Two-armed nearly vertical oscillations are interesting in the sense that they are trapped in an inner region of disks with proper frequencies, if the inner edge of ...
Kato, Shoji
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