Contributors:Hojat Ghonoodi, Hossein Miar-Naimi, Mohammad Gholami
Plot of oscillationfrequency versus the number of stage for sinusoidal case. Vbias=0.7, Iss=[0.6_1mA], Wn/L=7/0.18, Wp/L=10/0.18.
... Plot of oscillationfrequency versus resistor load for sinusoidal case. N=3, Wn/L=[4/0.18_10/0.18], Cl=[67.5fF_87fF], Iss=1mA.
... The chain of delay stages in (a) a single-ended ring oscillator and (b) a differential ring oscillator.
... Ring oscillators... Plot of oscillationfrequency versus the number of stage for exponential case. Vbias=0.7, Iss=[0.6_1mA], Wn/L=15/0.18, Wp/L=10/0.18.
... Plot of oscillationfrequency versus external capacitor for exponential case. N=3, Wn/L=15/0.18, RL=1.5k, Iss=1mA.
Ictal EEG recorded at a sampling rate of 10kHz (Patient 1). (A) Ictal EEG shown using conventional filter settings (low-pass filter 120Hz, time constant 0.1s). Only 10 channels are shown. Ictal EEG shows initial spike burst at HI1–4/HS1–4 and spike-and-waves at A5–6, followed by electrodecremental pattern and low amplitude fast activities at HI1–3/HS1. Filled circle and straight line indicate the presence of VHFO. The EEG at B, C, and D is shown using VHFO filter settings. (B and C) Preictal VHFO detected visually using low-pass filter of 3kHz and time constant of 0.001s. Preictal VHFO of 1000–2500Hz are observed at HI1 and HI2 electrodes (underlined). They appear intermittently before the start of seizures, and are interrupted by spikes. The amplitudes are 3.5–22.1μV (note the calibrations), and the durations were 12–27ms. These activities are not observed at other electrodes. HFO of 350–550Hz are seen at HS1–2 and HI1–2 electrodes, with durations of HFO of 10–14ms and the amplitudes of 22.6–234.7μV. Representative HFO peaks are marked by triangles (B). (D) VHFO recorded at HI1, HI2 (both electrodes also record preictal VHFO) and HS1 electrodes become sustained at the start of seizure. The frequencies of VHFO are 1000–2000Hz and the amplitudes are around 8.8–14.1μV. These activities superimpose on the slower rhythmic activities (70–90Hz) (marked by triangles). Sustained VHFO lasted approximately 10s. Again, these activities are not observed at other electrodes, although rhythmic activities are recorded.
... Very high frequencyoscillations
Contributors:Li Wang, Qingmei Kong, Ke Li, Yunai Su, Yawei Zeng, Qinge Zhang, Wenji Dai, Mingrui Xia, Gang Wang, Zhen Jin, Xin Yu, Tianmei Si
Brain regions showing significant group and frequency (slow-4 and slow-5) interaction effects on ALFF.
... The group and frequency (slow-4 and slow-5) interaction effects on ALFF. The regions showing significant group and frequency interaction effects on ALFF (hot colors): the left ventromedial prefrontal cortex (a), the left inferior frontal gyrus/precentral gyrus (b), and the bilateral posterior cingulate cortex/precuneus (c). The bar maps show the mean ALFF values for these regions.
... Low-frequencyoscillation... Frequency dependence... Main effects of group and frequency on ALFF. (a) The group main effects on ALFF. Hot colors represent increased ALFF in the MDD group compared with HC, while the blue colors represent the opposite. (b) Frequency main effects on ALFF. Hot colors represent increased ALFF in the slow-5 as compared to slow-4 band, while the blue colors represent the opposite. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
Variation of drag coefficient ratio (CD/CDo) with respect to the oscillation amplitude θA at FR=1.0.
... Schematics of the rotationally oscillating motion of a circular cylinder.
... Variation of streamwise velocity fluctuations u′ at the forcing frequency measured at a point x/d=2, y/d=0.5 with varying the oscillation amplitude θA for Re=4.14×103 and FR=1.0.
... Variation of lock-on range with respect to frequency ratio FR and oscillation amplitude θA.
... Forcing frequency... Variation of vortex shedding frequency in the high-frequency transition regime at x/d=2. (a) FR=1.3, (b) FR=1.4, (c) FR=1.6, (d) FR=1.8.
... Rotational oscillation
(a) Basic design conception of the wide operation frequency range phase interpolator circuit, and (b) the timing diagram of the DTA phase interpolator with various oscillationfrequencies.
... Circuit architecture of the multiple frequency clock generator.
... Microphotograph of the multiple frequency clock generator.
... Normalized phase difference error with various oscillationfrequencies.
... Multiple frequency... Measured frequency spectra of the output frequency (a) 88.8MHz (=2/3×133MHz) and (b) 797.8MHz (=6/1×133MHz).
... Voltage-controlled oscillator
Pressure-domain signal and corresponding frequency-domain signal (a) pressure signal and (b) frequency signal.
... Performance characteristic curve insensitive to feedback fluidic oscillator configurations.
... Geometrical parameters of oscillators I, II, and III.
... Experimental results in Fig. 11 by Yang et al. , (a) fluidic oscillators and (b) plot of f versus α.
... Feedback fluidic oscillator... Fluidic oscillation... Schematic of feedback fluidic oscillators with (a) planar attachment walls (PAW), (b) step-shaped attachment walls (SAW), and (c) curved attachment walls (CAW).
Contributors:S. Özcan, A. Toker, C. Acar, H. Kuntman, O. Çiçekoģlu
Oscillation conditions and oscillationfrequencies for proposed topologies with tracking errors
... General configuration of the CDBA based single resistance-controlled oscillator.
... Proposed CDBA based single resistance-controlled oscillators
... Voltage-controlled oscillators... Oscillation conditions and oscillationfrequencies of proposed topologies
... Calculated and experimental variations of oscillationfrequency with frequency control resistance R1 for C3=C5=1nF and C3=C5=10nF (R2=5kΩ, R6=10kΩ).
... Single resistance-controlled oscillators
Contributors:Moinuddin Malik, Ajit Mujumdar, Rajesh Dave
Effect of number of particles on critical frequency of oscillating sectorial containers
... Oscillating sectorial containers... Snapshots of unary particulate beds at the end of 20 oscillation cycles for various oscillationfrequencies.
... Variation of initial and long time mixing rate constants with oscillationfrequency.
... Snapshots of binary particulate beds at the end of 20 oscillation cycles for various oscillationfrequencies.
... Snapshots at the end of 20 oscillation cycles of two types of particulate beds having different number of particles; snapshot (b) is at critical frequency, and snapshots (a) and (c) are at frequencies below and above the critical frequency.
A plot of the schematic description about the locked zone for different oscillating amplitude (A) and frequency (F) with Re=100.
... The mean and RMS values of the Nusselt number (Nu(ave), Nu(RMS)) for different oscillatingfrequencies and different Reynolds number (Re) with A=0.25, where Nu0 is the mean Nusselt number of the flow around a heated stationary cylinder corresponding to the same Re as the oscillation conditions.
... The mean and RMS value of the Nusselt number (Nu (ave), Nu (RMS)) for different oscillatingfrequencies and amplitudes with Re=100.
... Time series of the mean Nusselt number (Nu) around the transversely oscillating cylinder with Re=200, A=0.4, Fc=0.2.
... Stream-wise oscillating cylinder... Power spectrum analysis of the drag (left) and lift (right) coefficients for different oscillatingfrequencies with Re=100, A=0.1.
Contributors:Jiwoo Hong, Young Kwon Kim, Kwan Hyoung Kang, Joonwon Kim, Sang Joon Lee
Variations of resonance frequency according to drop viscosity. Dash denotes absence of resonance frequency.
... Temporal evolution of the base radius (colored symbol) of oscillating drops with different viscosities for different frequencies of (a) 32Hz and (b) 98Hz at η=0.25; (c) 28 and (d) 94Hz at η=0.39. The dashed lines denote subharmonic oscillation.
... Maximum amplitudes of oscillating drops with different viscosities along with AC frequency at different η; (a) and (b): η=0.25, (c) and (d) η=0.39.
... Oscillation patterns of 5μL drops with different viscosities at η=0.25 for different frequencies of (a) 32Hz and (b) 98Hz. The patterns are obtained by superposing more than 20 images. The solid lines in the right column depict instantaneous drop deformation for theoretical P2 and P4 mode shape oscillation; short dashed lines represent initial quiescent shapes; arrows denote nodal points.
... Resonance frequency... Frequency response at harmonic and subharmonic frequencies.
... Drop oscillation