Results 151 to 160 of about 1,050 (195)

Subharmonic spherical bubble oscillations induced by parametric surface modes [PDF]

Physical Review E, 2020
A potential source of subharmonic bubble emissions is revealed experimentally by high-speed imaging. When an acoustic bubble is driven at sufficiently large pressure amplitudes, energy transfer from surface to volume oscillations can lead to the triggering of subharmonic spherical oscillations.
Matthieu Guedra, Sarah Cleve, Cyril Mauger   +2 more
exaly   +5 more sources

Generation Threshold of Subharmonic Modes in Piezoelectric Resonator

, 2006
In this chapter, a simple phenomenological theoretical model for subharmonic threshold generation in a monodimensional finite structure is presented and some experimental results of subharmonic threshold generation in a piezoelectric resonator are ...
A Alippi, A Bettucci, Daniele Passeri
exaly   +4 more sources

Stability of Normal Modes and Subharmonic Bifurcations in the 3-Body Stokeslet Problem

Journal of Differential Equations, 1995
The authors investigate a model related to the sedimentation under gravity of spheres in a highly viscous fluid. Motivated by experimental and analytic investigations they study the motions of 3 identical point particles. Due to the symmetry of the model it is possibly to reduce the originally 6-dimensional system of ODEs with one conserved quantity to
Lim, C.C., Mccomb, I.H.
exaly   +4 more sources

Unitary Subharmonic Response and Floquet Majorana Modes [PDF]

Physical Review Letters, 2020
Detection and manipulation of excitations with non-Abelian statistics, such as Majorana fermions, are essential for creating topological quantum computers. To this end, we show the connection between the existence of such localized particles and the phenomenon of unitary subharmonic response (SR) in periodically driven systems.
Oles Shtanko, Ramis Movassagh
exaly   +4 more sources

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Coexistence of Subharmonic Resonant Modes Obeying a Period-Adding Rule

International Journal of Bifurcation and Chaos in Applied Sciences and Engineering, 2018
We report numerical evidence of a novel chain of subharmonic resonances organized in period-adding domains in the parameter space. Different periodic domains are mediated by a coexisting main subharmonic motion according to a hierarchical organization rule.
Tiago Kroetz, Jefferson S E Portela, Ricardo L Viana   +2 more
exaly   +3 more sources

Subharmonic Resonant Optical Excitation of Confined Acoustic Modes in a Free-Standing Semiconductor Membrane at GHz Frequencies with a High-Repetition-Rate Femtosecond Laser

Physical Review Letters, 2011
International audienceWe propose subharmonic resonant optical excitation with femtosecond lasers as a new method for the characterization of phononic and nanomechanical systems in the gigahertz to terahertz frequency range. This method is applied for the
R Gebs, F Hudert, G Klatt
exaly   +2 more sources

Combining Subharmonic and Ultraharmonic Modes for Intravascular Ultrasound Imaging: A Preliminary Evaluation [PDF]

Ultrasound in Medicine and Biology, 2017
Contrast-enhanced intra-vascular ultrasound (CE-IVUS) imaging could provide clinicians a valuable tool to assess cardiovascular risk and guide the choice of therapeutic strategies. In this technical note, we evaluated the feasibility of combining subharmonic and ultraharmonic imaging to improve the performance of CE-IVUS.
Himanshu Shekhar, Marvin M Doyley
exaly   +3 more sources

Subharmonic Fourier domain mode locking

Optics Letters, 2009
We demonstrate a subharmonically Fourier domain mode-locked wavelength-swept laser source with a substantially reduced cavity fiber length. In contrast to a standard Fourier domain mode-locked configuration, light is recirculated repetitively in the delay line with the optical bandpass filter used as switch.
Eigenwillig, Christoph M., Huber, Robert, Wieser, Wolfgang, Biedermann, Benjamin R.   +3 more
openaire   +2 more sources

Subharmonic autoresonance of the diocotron mode

Physics of Plasmas, 2000
This paper investigates the excitation and control of the driven l=1 diocotron mode in a pure electron plasma by adiabatic passage through higher order resonances. The excitation takes place when the driving frequency ωd is swept such that its nth harmonic passes through the linear diocotron mode frequency ω0; ωd≈ω0/n, n=2,3,….
L. Friedland, J. Fajans, E. Gilson
openaire   +1 more source

Subharmonic and strong resonances through coupling with a zero mode [PDF]

Physics Letters A, 1996
Abstract We show that the interaction between a homogeneous bifurcation and diffusive instabilities can give rise to a rich variety of subharmonic and superharmonic 1D patterns. Stability domains deduced from pertinent amplitude equations are in good agreement with numerical integration of a symmetric reaction-diffusion system.
Hilali, M. F., Dewel, Guy, Borckmans, Pierre   +2 more
openaire   +1 more source