Results 21 to 30 of about 25,540 (244)

Multichannel operation of an integrated acousto-optic wavelength routing switch for WDM systems [PDF]

, 1994
Polarization independent acousto-optic tunable filters (PIAOTF's) can operate as transparent wavelength-selective crossconnects to route signals in wavelength division multiplexed optical networks.
Baran, J. E., D'Alessandro, Antonio, Smith, D. A.   +2 more
core   +1 more source

Study of the feasibility of the MASW seismic method in coal prospecting: a study based on a conceptual model for the Candiota mine, southern Brazil [PDF]

REM: International Engineering Journal
The main coal reserves in Brazil are located in the southern region, where the most important coalfield, including the Candiota mine, is found. The mineral exploration and mine planning programs of the companies mining these coal deposits are generally ...
Lucas Rosso Lopes, Marcus Vinícius Aparecido Gomes de Lima, Randell Alexander Stephenson   +2 more
doaj   +1 more source

Global Alfven Eigenmodes in the H-1 heliac [PDF]

, 2017
Recent upgrades in H-1 power supplies have enabled the operation of the H-1 experiment at higher heating powers than previously attainable. A heating power scan in mixed hydrogen/helium plasmas reveals a change in mode activity with increasing heating ...
Blackwell, B. D., Bowden, G., Cole, M., Haskey, S. R., Hole, M. J., Konies, A., Michael, C., Zhao, F.   +7 more
core   +2 more sources

Transverse excitations of ultracold matter waves upon propagation past abrupt waveguide changes [PDF]

, 2004
The propagation of ultracold atomic gases through abruptly changing waveguide potentials is examined in the limit of non-interacting atoms. Time-independent scattering calculations of microstructured waveguides with discontinuous changes in the ...
B. D. Esry, E. Merzbacher, M. Koehler, M. W. J. Bromley, R. Folman, U. Fano   +5 more
core   +3 more sources

Multichannel Analysis of Surface Waves (MASW) for the internal characterisation of the Flüela rock glacier: overcoming the limitations of seismic refraction tomography [PDF]

The Cryosphere
A multi-method geophysical campaign was carried out to characterize the subsurface of the Flüela rock glacier in Grisons, Switzerland, using electrical resistivity tomography (ERT), seismic refraction tomography (SRT), and multichannel analysis of ...
I. Barone, A. Bast, A. Bast, M. Pavoni, S. J. Gaona Torres, L. Peruzzo, J. Boaga   +6 more
doaj   +1 more source

Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach [PDF]

Hydrology and Earth System Sciences, 2020
Identifying and quantifying recharge processes linked to ephemeral surface water features is challenging due to their episodic nature. We use a combination of well-established near-surface geophysical methods to provide evidence of a surface and ...
B. A. Flinchum, E. Banks, M. Hatch, M. Hatch, O. Batelaan, L. J. M. Peeters, S. Pasquet   +6 more
doaj   +1 more source

Assessing the Seismic Wavefield of a Wind Turbine Using Polarization Analysis [PDF]

, 2017
Ambient seismic noise can often be seen as problematic, but with the right analysis can act as a tool to image the Earth. Wind turbines are known to generate low frequency vibrations, however, the wave types that are generated are currently unknown ...
Adam, Bataille, Flinn, Hendrick, Jackson, Moschetti, Nicolson, Park, Pischiutta, Riahi, Saccorotti, Shapiro, Stachnik, Tiapkina, Tokeshi, Vidale, Westwood   +16 more
core   +1 more source

Transition factor between elastic and deformation moduli for dispersive soils

Magazine of Civil Engineering, 2020
The paper is devoted to the perspective trend of researches on estimation of physical and mechanical characteristics of dispersive soils by means of non-destructive methods of in-situ testing by wave analysis. The paper presents the results of comparison
Vadim Antipov, Vadim Ofrikhter
doaj   +1 more source

Finite-Frequency SKS Splitting: Measurement and Sensitivity Kernels [PDF]

, 2008
Splitting of SKS waves caused by anisotropy may be analyzed by measuring the splitting intensity, i.e., the amplitude of the transverse signal relative to the radial signal in the SKS time window. This quantity is simply related to structural parameters.
Paulssen, Hanneke, Sieminski, Anne, Trampert, Jeannot, Tromp, Jeroen   +3 more
core   +1 more source

MASW and ERT for near-surface characterization at the Huai Hong Khrai Royal Development Study Center, Doi Saket, Chiang Mai, Thailand [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2020
Preliminary investigation of subsurface properties by geophysical methods were carried out over the construction site of the 40 meters Thai National Radio Telescope (TNRT) facility planning by National Astronomical Research Institute of Thailand (NARIT)
Siriporn Chaisri, Suwimon Udphuay, Niti Mankhemthong, Weerapan Srichan, Pitak Kempet, Phrudth Jaroenjittichai   +5 more
doaj   +1 more source