Results 81 to 90 of about 252,524 (293)

Parametric Resonance in a Time-Dependent Harmonic Oscillator

Моделирование и анализ информационных систем, 2013
In this paper, we study the phenomenon of appearance of new resonances in a timedependent harmonic oscillator under an oscillatory decreasing force. The studied equation belongs to the class of adiabatic oscillators and arises in connection with the ...
P. N. Nesterov
doaj   +3 more sources

Numerical Study of Resonant Optical Parametric Amplification via Gain Factor Optimization in Dispersive Microresonators

Photonics, 2019
The achievement of wideband high-gain optical parametric amplification has not been shown in micrometer-scale cavities. In this paper we have computationally investigated the optical parametric amplification process in a few micrometer-long dispersive ...
Özüm Emre Aşırım, Mustafa Kuzuoğlu   +1 more
doaj   +1 more source

Non-Linear Resonance in Relativistic Preheating

, 2014
Inflation in the early Universe can be followed by a brief period of preheating, resulting in rapid and non-equilibrium particle production through the dynamics of parametric resonance.
Underwood, Bret, Zhai, Yunxiao
core   +1 more source

Excitation of Kaluza-Klein gravitational mode [PDF]

, 2000
We investigate excitation of Kaluza-Klein modes due to the parametric resonance caused by oscillation of radius of compactification. We consider a gravitational perturbation around a D-dimensional spacetime, which we compactify on a (D-4)-sphere to ...
E. E. Flanagan, E. Halyo, E. W. Kolb, J. H. Schwartz, J. Polchinski, James M. Cline, K. Maeda, Kunihito Uzawa, L. Amendola, L. Kofman, L. Landau, L. Randall, M. A. Rubin, M. A. Rubin, M. B. Green, N. Arkani-Hamed, P. Candelas, P. G. O. Freund, S. Mukohyama, Shinji Mukohyama, T. Applquist, W. D. Goldberger, W. D. Goldberger, Yoshiyuki Morisawa   +23 more
core   +2 more sources

Spin Tune Parametric Resonance Investigation

, 2014
The idea of resonant spin oscillation method was modernized and improved in Forschungszentrum Julich in the proposed experiment at the COSY ring. The resonant method is based on spin tune parameterization using transverse RF magnetic or/and electric field.
Senichev, Yu., Ivanov, A., Lehrach, A., Maier, R., Zyuzin, D., Andrianov, Germany S.   +5 more
openaire   +2 more sources

Parametric resonance in non-linear elastodynamics

International Journal of Non-Linear Mechanics, 2009
Abstract We show that finite amplitude shearing motions superimposed on an unsteady simple extension are admissible in any incompressible isotropic elastic material. We show that the determining equations for these shearing motions admit a general reduction to a system of ordinary differential equations (ODEs) in the remarkable case of generalized ...
SACCOMANDI, Giuseppe, PUCCI, Edvige
openaire   +3 more sources

Parametric resonance and cosmological gravitational waves [PDF]

Physical Review D, 2008
We investigate the production of gravitational waves due to quantum fluctuations of the vacuum during the transition from the inflationary to the radiation-dominated eras of the universe, assuming this transition to be dominated by the phenomenon of parametric resonance.
Sá, Paulo M., Henriques, Alfredo B.
openaire   +2 more sources

Predicting Epileptogenic Tubers in Patients With Tuberous Sclerosis Complex Using a Fusion Model Integrating Lesion Network Mapping and Machine Learning

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Accurate localization of epileptogenic tubers (ETs) in patients with tuberous sclerosis complex (TSC) is essential but challenging, as these tubers lack distinct pathological or genetic markers to differentiate them from other cortical tubers.
Tinghong Liu, Qi Wang, Suhui Kuang, Dezhi Cao, Ping Ding, Shaohui Zhang, Haihua Wei, Zhirong Wei, Jinshan Xu, Xinyu Huang, Bing Liu, Shuli Liang   +11 more
wiley   +1 more source

Parametric resonances and resonant delocalisation in quasi-phase matched photon-pair generation and quantum frequency conversion

New Journal of Physics, 2019
The existing widely-accepted theory of photon-pair generation via spontaneous down-conversion (SPDC) in nonlinear optical crystals and waveguides is incomplete, as it fails to account for the important physical phenomenon of parametric resonances.
Philip B Main, Peter J Mosley, Andrey V Gorbach   +2 more
doaj   +1 more source

Parametric resonance in metallic bellows connected to pipe due to seismic excitation

Nihon Kikai Gakkai ronbunshu, 2015
This paper discusses the parametric resonance of the metallic bellows which is connected to the fluid filled pipe subjected to the seismic excitation. The axial stiffness of the metallic bellows varies due to the internal fluid pressure variation, and ...
Tomoya YORIKI, Nobuyuki KOBAYASHI, Masahiro WATANABE   +2 more
doaj   +1 more source