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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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Armstrong, M. (author)Non-invasive in-situ measurements can determine the soil properties in an undisturbed way, providing a more accurate characterization of the soil stiffness and damping. This report focuses on the multichannel analysis of surface waves (MASW) technique. The measured dispersion of a propagating seismic wave is used to characterize the variation of...master thesis 2016
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van Berkel, S.L. (author), Garufo, A. (author), Llombart, Nuria (author), Neto, A. (author)In this article, we present a freely accessible software tool that allows for fast characterization of dynamic phenomena in a wide variety of transmission lines that include characteristic impedance, effective dielectric constant, and losses, such as radiation into space and surface waves. For printed transmission lines, the radiation effects...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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Ashruf, T.N. (author)Knowledge of near-surface seismic-wave velocity of granular materials plays a valuable role in seismic exploration data processing. I will use the surface-wave analysis method for estimation of shear-wave velocity profile and P-wave refraction for estimation of pressure-wave velocity on a data set acquired over a sand dune in The Netherlands, a...master thesis 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
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Van Berkel, S.L. (author)In this contribution, a quasi-analytical model is proposed allowing for fast characterization of a wide variety of printed transmission lines in terms of characteristic impedance, effective dielectric constant and losses. These losses are composed out of conductor losses, dielectric losses and radiation losses due to space and surface wave...master thesis 2015
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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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Syed, W.H. (author), Fiorentino, G. (author), Cavallo, D. (author), Spirito, M. (author), Sarro, Pasqualina M (author), Neto, A. (author)In this paper, we demonstrate, at 300 GHz and with integrated technology, the effectiveness of artificial dielectric layers to enhance the front-to-back ratio of printed antennas. This concept was previously proposed at microwave frequencies and using printed circuit board technology. The artificial material is now realized by introducing non...journal article 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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Weemstra, C. (author), Westra, W. (author), Snieder, R. (author), Boschi, L. (author)Measuring attenuation on the basis of interferometric, receiver-receiver surface waves is a non-trivial task: the amplitude, more than the phase, of ensemble-averaged cross-correlations is strongly affected by non-uniformities in the ambient wavefield. In addition, ambient noise data are typically pre-processed in ways that affect the amplitude...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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De Waard, V.M. (author)In this thesis, seismic interferometry by multi dimensional deconvolution is used to retrieve the surface-wave response from a virtual source to a receiver by using the observations due to, often passive, noise sources located elsewhere. The virtual source response is used to retrieve the phase velocity, a property used for shallow subsurface...master thesis 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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Potman, K.J. (author)We model guided modes for an infinitely long metallic structure in the lateral direction that is invariant in the transverse direction, and mechanically supported by a dielectric layer This modeling is done without making any assumptions about the width of the slots relative to the spatial period. We do this by representing the electric field by...master thesis 2010