Results 31 to 40 of about 147,257 (198)
Sensors, 2017 An acoustic spectroscopic approach to detect contents within different packaging, with substantially wider applicability than other currently available subsurface spectroscopies, is presented.
Javier Moros +2 more
doaj +1 more source
Regular modes in rotating stars
, 2011 Despite more and more observational data, stellar acoustic oscillation modes are not well understood as soon as rotation cannot be treated perturbatively.
A. Baglin +10 more
core +3 more sources
Cumhuriyet Science Journal, 2022 Dispersion profiles and surface acoustic wave attenuation characteristics of ring-shaped phononic crystals are investigated as a function of the core pillar height. Finite element method simulations are carried out for both band analyses and transmission
Furkan Kuruoğlu
doaj +1 more source
Recent Progress in Distributed Brillouin Sensors Based on Few-Mode Optical Fibers
Sensors, 2021 Brillouin scattering is a dominant inelastic scattering observed in optical fibers, where the energy and momentum transfer between photons and acoustic phonons takes place.
Yong Hyun Kim, Kwang Yong Song
doaj +1 more source
Second and third season QUaD CMB temperature and polarization power spectra [PDF]
, 2009 We report results from the second and third seasons of observation with the QUaD experiment. Angular power spectra of the Cosmic Microwave Background are derived for both temperature and polarization at both 100 GHz and 150 GHz, and as cross frequency ...
A. E. Lange +52 more
core +7 more sources
Stretched-exponential Doppler spectra in underwater acoustic communication channels [PDF]
The Journal of the Acoustical Society of America, 2010 The theory of underwater sound interacting with the sea surface predicts a Gaussian-spread frequency spectrum in the case of a large Rayleigh parameter. However, recent channel soundings reveal more sharply peaked spectra with heavier tails. The measured Doppler spread increases with the frequency and differs between multipath arrivals.
P A, van Walree, T, Jenserud, R, Otnes
openaire +2 more sources
Phonon confinement and size effect in Raman spectra of ZnO nanoparticles
Heliyon, 2019 We study Raman spectra of ZnO nanoparticles of 5–12 nm size in the whole range of the first-order phonon bands. We apply the 3D phonon confinement model (PCM) for the interpretation of the observed Raman spectra.
Vitaly I. Korepanov +3 more
doaj +1 more source
Quantum interference between dark-excitons and zone-edged acoustic phonons in few-layer WS2
Nature Communications, 2023 Here, the authors investigate the Raman spectra of few-layered WS2 when the excitation energy is in resonance with the dark exciton, and observe a Fano resonance between dark excitonsand zone-edge acoustic phonons.
Qing-Hai Tan +10 more
doaj +1 more source
Optical characterization of electron-phonon interactions at the saddle point in graphene
, 2013 The role of electron-phonon interactions is experimentally and theoretically investigated near the saddle point absorption peak of graphene. The differential optical transmission spectra of multiple, non-interacting layers of graphene reveals the ...
Binder, Rolf +7 more
core +2 more sources
, 2017 In recent years, the autocorrelation of the hydrogen Lyman-{\alpha} forest has been used to observe the baryon acoustic peak at redshift 2 < z < 3.5 using tens of thousands of QSO spectra from the BOSS survey.
Baron, Dalya +4 more
core +2 more sources