Searched for: subject:"surface%5C+waves"
(1 - 20 of 20)
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Ponomarenko, A. V. (author), Kashtan, B. M. (author), Troyan, V. N. (author), Mulder, W.A. (author)

Surface waves are often used to estimate a near-surface shear-velocity profile. The inverse problem is solved for the locally one-dimensional problem of a set of homogeneous horizontal elastic layers. The result is a set of shear velocities, one for each layer. To obtain a P-wave velocity profile, the P-guided waves should be included in the...

journal article 2017
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Kruiver, Pauline P. (author), van Dedem, Ewoud (author), Romijn, Remco (author), de Lange, Ger (author), Korff, M. (author), Stafleu, Jan (author), Gunnink, Jan L. (author), Rodriguez-Marek, Adrian (author), Bommer, Julian J. (author), van Elk, Jan (author), Doornhof, Dirk (author)

A regional shear-wave velocity (VS) model has been developed for the Groningen gas field in the Netherlands as the basis for seismic microzonation of an area of more than 1000 km2. The VS model, extending to a depth of almost 1 km, is an essential input to the modelling of hazard and risk due to induced...

journal article 2017
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Ishiyama, T. (author), Blacquière, G. (author), Verschuur, D.J. (author), Mulder, W.A. (author)

Surface waves in seismic data are often dominant in a land or shallow-water environment. Separating them from primaries is of great importance either for removing them as noise for reservoir imaging and characterization or for extracting them as signal for near-surface characterization. However, their complex properties make the surface-wave...

journal article 2016
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Kästle, Emanuel D. (author), Soomro, Riaz (author), Weemstra, C. (author), Boschi, Lapo (author), Meier, Thomas (author)
Phase velocities derived from ambient-noise cross-correlation are compared with phase velocities calculated from cross-correlations of waveform recordings of teleseismic earthquakes whose epicentres are approximately on the station–station great circle. The comparison is conducted both for Rayleigh and Love waves using over 1000 station pairs in...
journal article 2016
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Penkin, D. (author)
Recently, the concept of a nanonetwork has attracted large attention of researchers as it potentially offers low-cost solutions for a wide spectrum of current applications and enables numerous emerging ones. At present, however, all the sensor networks consist of a relatively small number of macroscale devices with their positions carefully pre...
doctoral thesis 2015
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Weemstra, C. (author), Wapenaar, C.P.A. (author), Van Dalen, K.N. (author)
In this work we investigate a modification of the formulation of the theory underlying seismic interferometry (SI) by multidimensional deconvolution (MDD). The current formulation, and hence method, relies on separation of waves traveling inward and outward of a volume bounded by receivers. As a consequence, it is predominantly useful when...
conference paper 2015
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Syed, W.H. (author)
Planar printed antenna technologies, due to their light weight, low profile, cost effectiveness and ease of connection with the active devices (e.g., amplifiers etc.), are becoming an attractive solution for the commercial data-hungry applications, such as 60 GHz high-data rate communication. Another commercial application of planar antennas...
doctoral thesis 2015
document
Ishiyama, T. (author)
Surface waves in seismic data are often dominant and mask primaries in land or shallow-water environments. Separating them from the primaries is of great importance either for removing them as noise for reservoir imaging and characterization, or for considering them as signal for near-surface characterization. However, their complex properties,...
doctoral thesis 2015
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Draganov, D.S. (author), Ruigrok, E.N. (author), Ghose, R. (author), Mikesell, D. (author), Van Wijk, K. (author)
We propose a method for estimating the reflection coefficient of a subvertical boundary and the the quality factor of the medium between a receiver and the subvertical boundary. The method uses surface waves from transient deterministic sources and is inspired by the occurrence of non-physical arrivals in seismic-interferometry results due to...
conference paper 2014
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Penkin, D. (author), Janssen, G. (author), Yarovoy, A. (author)
The power budget of a wireless link between two electrically small sensor nodes located close to an interface between two media is studied. The model includes both the propagation channel losses and input impedance of the radio frequency antennas. It is shown that a highly inductive half-space significantly enhances the received power due to the...
journal article 2014
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Panea, I. (author), Draganov, D.S. (author), AlmagroVidal, C. (author), Mocanu, V. (author)
We applied seismic interferometry (SI) by crosscorrelation to ambient-noise panels recorded in the Mizil area, Romania, aiming to retrieve body-wave reflections. To achieve this goal, surface waves in the noise panels input to SI should be suppressed. We did this by selecting for input to SI-only noise panels that are not dominated by surface...
journal article 2014
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Van Dalen, K.N. (author), Wapenaar, C.P.A. (author), Halliday, D.F. (author)
Virtual-source surface wave responses can be retrieved using the crosscorrelation (CC) of wavefields observed at two receivers. Higher mode surface waves cannot be properly retrieved when there is a lack of subsurface sources that excite these wavefields, as is often the case. In this paper, we present a multidimensional-deconvolution (MDD)...
journal article 2013
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Ishiyama, T. (author)
In a shallow water environment, mud-rolls are often dominant and appear as a prevailing coherent noise in OBC seismic data. Their complex properties make the noise elimination notably challenging in seismic processing. To address these challenges, we propose a dispersive multimodal mud-roll elimination method using a feedback-loop approach with...
journal article 2013
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Wapenaar, C.P.A. (author), Ruigrok, E.N. (author), Van der Neut, J.R. (author), Draganov, D.S. (author)
The methodology of surface?wave retrieval from ambient seismic noise by crosscorrelation relies on the assumption that the noise field is equipartitioned. Deviations from equipartitioning degrade the accuracy of the retrieved surface?wave Green's function. A point?spread function, derived from the same ambient noise field, quantifies the...
journal article 2011
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Mulligan, R.P. (author), Bowen, A.J. (author), Hay, A.E. (author), Van der Westhuysen, A.J. (author), Battjes, J.A. (author)
Evolution of the wave field in a coastal bay is investigated, by comparison between field observations and numerical simulations using a spectral wave model (Simulating WAves Nearshore (SWAN)). The simulations were conducted for the passage of an extratropical storm, during which surface elevation spectra were bimodal owing to local wind-sea...
journal article 2008
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Janssen, T.T. (author)
As ocean surface waves radiate into shallow coastal areas and onto beaches, their lengths shorten, wave heights increase, and the wave shape transforms from nearsinusoidal to the characteristic saw-tooth shapes at the onset of breaking; in the ensuing breaking process the wave energy is cascaded to small-scale turbulent motions in the surf zone....
doctoral thesis 2006
document
Vroubel, M. (author), Zhuang, Y. (author), Rejaei, B. (author), Burghartz, J.N. (author)
Various microstrips with a ferromagnetic core were designed and fabricated on a silicon substrate. The core was formed by a 0.5-?m-thick Ni78Fe22 film, patterned into rectangular prisms. Measurement results for attenuation constant versus frequency show a peak value of ? 50?dB/cm around 10?GHz. Electromagnetic simulations show that the...
journal article 2006
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Lee, J.W. (author), Seo, M.A. (author), Park, D.J. (author), Kim, D.S. (author), Jeoung, S.C. (author), Lienau, C. (author), Park, Q.H. (author), Planken, P.C.M. (author)
Terahertz transmission filters have been manufactured by perforating metal films with various geometric shapes using femtosecond laser machining. Two dimensional arrays of square, circular, rectangular, cshaped, and epsilon-shaped holes all support over 99% transmission at specific frequencies determined by geometric shape, symmetry,...
journal article 2006
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Andrianov, A.O.I. (author)
Due to the growth of their population, urban development and the corresponding expansion of land use, several countries have decided to build artificial islands in the sea to decrease the pressure on the heavily used land space. The reclamation of the land from the sea is already widely applied, however, there is also an attractive new...
doctoral thesis 2005
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Riyanti, C.D. (author)
In this thesis, we present a modeling method based on a domain-type integral representation for waves propagating along the surface of the Earth which have been scattered in the vicinity of the source or the receivers. Using this model as starting point, we formulate an inversion scheme to estimate properties of scattering objects close to the...
doctoral thesis 2005
Searched for: subject:"surface%5C+waves"
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