Results 41 to 50 of about 252,524 (293)

Parametric Resonance in Quantum Field Theory [PDF]

Physical Review Letters, 2003
We present the first study of parametric resonance in quantum field theory from a complete next-to-leading order calculation in a 1/N-expansion of the 2PI effective action, which includes scattering and memory effects. We present a complete numerical solution for an O(N)-symmetric scalar theory and provide an approximate analytic description of the ...
Berges, J., Serreau, J.
openaire   +3 more sources

Parametric resonance in concrete beam-columns

Latin American Journal of Solids and Structures
A dynamic instability, called parametric resonance, is exhibited by undampedelastic beam-columns when under the action of pulsating axial force. The scope of the existing theory of parametric resonance is restricted to physically linear beam-columns ...
Mamta R. Sharma, Arbind K. Singh, Gurmail S. Benipal   +2 more
doaj   +1 more source

Phase-Induced (In)-Stability in Coupled Parametric Oscillators

, 2000
We report results on a model of two coupled oscillators that undergo periodic parametric modulations with a phase difference $\theta$. Being to a large extent analytically solvable, the model reveals a rich $\theta$ dependence of the regions of ...
A. H. Nayfeh, B. van der Pol, C. Van den Broeck, D. Ballon, E. Kh. Akhmedov, F. S. Prato, I. Bena, I. Zlatev, J. W. Miles, J.-Y. Ji, K. Otsuka, Katja Lindenberg, L. D. Landau, M. Calvo, M. Calvo, M. Schienbein, Mauro Copelli, N. V. Fomin, S. Riyopoulos, S. Riyopoulos, S. T. Milner   +20 more
core   +1 more source

Opening the air‐chamber of an oscillating water column spar buoy wave energy converter to avoid parametric resonance

IET Renewable Power Generation, 2021
The oscillating‐water‐column (OWC) spar‐buoy is a type of wave energy converter that may exhibit undesirable large roll and pitch amplitudes caused by a dynamic instability induced by parametric resonance.
Josh Davidson, João C. C. Henriques, Rui P. F. Gomes, Roberto Galeazzi   +3 more
doaj   +1 more source

Quantization of adiabatic pumped charge in the presence of superconducting lead [PDF]

, 2002
We investigate the parametric electron pumping of a double barrier structure in the presence of a superconducting lead. The parametric pumping is facilitated by cyclic variation of the barrier heights $x_1$ and $x_2$ of the barriers. In the weak coupling
A.F. Andreev, B.G. Wang, Baigeng Wang, C.W.J. Beenakker, D.J. Thouless, D.S. Fisher, F. Zhou, G.B. Lesovik, I.L. Aleiner, I.L. Aleiner, J. Wang, J. Wang, J. Wang, J.E. Avron, Jian Wang, M. Moskalets, M. Switkes, M. Wagner, M.G. Vavilov, M.K. Yip, M.L. Polianski, P. Sharma, P.W. Brouwer, P.W. Brouwer, Q. Niu, Q.F. Sun, T. Gramespacher, T.A. Shutenko, V. Gasparian, X.B. Wang, Y. Levinson, Y.D. Wei, Y.D. Wei   +32 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Interactions between directly and parametrically driven vibration modes in a micromechanical resonator

, 2011
The interactions between parametrically and directly driven vibration modes of a clamped-clamped beam resonator are studied. An integrated piezoelectric transducer is used for direct and parametric excitation.
D. M. Karabacak, H. J. R. Westra, H. S. J. van der Zant, M. Crego-Calama, R. Lifshitz, S. H. Brongersma, W. J. Venstra   +6 more
core   +2 more sources

Impact of other scalar fields on oscillons after hilltop inflation [PDF]

, 2016
Oscillons are spatially localized and relatively stable field fluctuations which can form after inflation under suitable conditions. In order to reheat the universe, the fields which dominate the energy density after inflation have to couple to other ...
Antusch, Stefan, Orani, Stefano
core   +2 more sources

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

Parametric Resonance in the Logistic Equation with Delay under a Two-Frequency Perturbation

Моделирование и анализ информационных систем, 2013
A logistic equation with a delay feedback circuit and with periodic perturbation of parameters is considered. The problem parameters (a coefficient of the linear growth and a delay) are chosen close to the critical values at which a cycle is bifurcated ...
N. D. Bykova, S. D. Glyzin, S. A. Kaschenko   +2 more
doaj   +1 more source