نتایج جستجو برای: wind and wave excitations

تعداد نتایج: 16901713  

Journal: :Physical review letters 2013
Yejin Huh Philipp Strack Subir Sachdev

We show that the Néel states of two-dimensional antiferromagnets have low energy vector boson excitations in the vicinity of deconfined quantum critical points. We compute the universal damping of these excitations arising from spin-wave emission. Detection of such a vector boson will demonstrate the existence of emergent topological gauge excitations in a quantum spin system.

2007
BIN LIU KEJIAN WU CHANGLONG GUAN

By incorporating the wave-induced Coriolis-Stokes forcing into the classical Ekman model, the wind energy input to the Ekman-Stokes layer is investigated, with an emphasis on the surface wave effects when the direction of Stokes drift deviates from that of wind stress. Theoretical analysis of the kinetic energy balance of the EkmanStokes layer shows that the total wind energy input consists of ...

Brief policy The studies reviewed in this section are from PubMed, ISI, Science Direct, Google Scholar, and Scopus databases using the following keywords: dust storm, meteorological elements, temperature, heat wave, cold wave, relative humidity, wind blow, atmospheric pressure, cardiovascular diseases, respiratory diseases, cerebrovascular diseases, myocardial infarction (MI), stroke (CVA), l...

2016
Thomaskutty Varghese Shailesh Nayak

Extreme all-direction wave conditions and joint probabilities of high waves and high water levels are derived at selected locations in the southern Arabian Gulf. The wave conditions are obtained using the spectral wave model SWAN with wind and offshore wave information procured from ocean weather, supplemented with local water level records. Wave transformations from offshore to nearshore and w...

2000
Eva Bauer Ralf Weisse

The influence of quasi-realistic high-frequency wind variability for the probability distribution of surface waves and for the skill of the predictions with the wave model WAM is investigated. So far, the sensitivity of the surface wave field to high-frequency wind variability has been demonstrated only for idealized wave conditions or particular events using rather simplified high-frequency wi...

2008
J. Touboul

This work studies the impact of wind on extreme wave events, by means of numerical analysis. A High Order Spectral Method (HOSM) is used to generate freak, or rogue waves, on the basis of modulational instability. Wave fields considered here are chosen to be unstable to two kinds of perturbations. The evolution of components during the propagation of the wave fields is presented. Their evolutio...

2003
Y. N. Srivastava A. Widom G. Pizzella

For mechanical Weber gravitational wave antennae, it is thought that gravity waves are weakly converted into acoustic vibrations. Acoustic vibrations in metals (such as Aluminum) are experimentally known to be attenuated by the creation of electron-hole pairs described via the electronic viscosity. These final state electronic excitations give rise to gravitational wave absorption cross section...

Journal: :Physical review letters 2006
Timofey Rostunov Eugene Demler Antoine Georges

We discuss collective spin-wave excitations in triplet superconductors with an easy axis anisotropy for the order parameter. Using a microscopic model for interacting electrons, we estimate the frequency of such excitations in Bechgaard salts and ruthenate superconductors to be 1 and 20 GHz, respectively. We introduce an effective bosonic model to describe spin-wave excitations and calculate th...

1996
Sudhansu S. Mandal

We study spin-flip and spin-wave excitations for arbitrarily polarized quantum Hall states by employing a fermionic Chern-Simons gauge theory in the low Zeeman energy limit. We show that the spin-flip correlation functions do not get renormalized by the fluctuations of Chern-Simons gauge field. As a consequence, the excitations for a given integer quantum Hall state are identical to fractional ...

Journal: :Earthquake Engineering & Structural Dynamics 2023

This study establishes a multi-hazard probabilistic assessment framework for assessing the integrity of monopile offshore wind turbines (OWT) under stochastic coupled effect wind, wave and earthquake loading. The procedure deals with entire operational range inflow speed (i.e., 3–25 m/s), which probability failure excitations is found to be non-negligible. Numerical analysis performed by implem...

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