Searched for: subject%3A%22GPR%22
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Ganther, Tobias (author)
Landmines and Improvised Explosive Devices (IEDs) are among the most dangerous weapons found in (former) conflict areas. Many of them have only minimal or even no metal built in making it difficult to detect such devices via conventional metal detectors. Thus, alternative methods such as Ground Penetrating Radar (GPR) are deployed for this...
master thesis 2021
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Gierens, Lena (author)
During their service live reinforced and prestressed concrete structures experience deterioration. Therefore, to effectively assure the safety and durability of the compounds, non destructive testing methods, such as Ground Penetrating Radar, employed at high frequencies, provide a rapid assessment of the geometry of the compound. Although...
master thesis 2020
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Dunmire, D. (author), Lenaerts, J.T.M. (author), Banwell, Alison (author), Wever, N. (author), Shragge, J. (author), Lhermitte, S.L.M. (author), Drews, R. (author), Pattyn, F. (author), Hansen, J.S.S. (author), Willis, I.C. (author), Miller, J. (author), Keenan, E. (author)
Between 1992 and 2017, the Antarctic Ice Sheet (AIS) lost ice equivalent to 7.6 ± 3.9 mm of sea level rise. AIS mass loss is mitigated by ice shelves that provide a buttress by regulating ice flow from tributary glaciers. However, ice-shelf stability is threatened by meltwater ponding, which may initiate, or reactivate preexisting, fractures,...
journal article 2020
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Hansen, Frederikke (author)
This thesis is part of a longer series of research into the use of geophysical methods for inves-tigation for forensic purposes, a collaboration between the Delft University of Technology (TU Delft) and the Netherlands Forensic Institute (NFI). In this investigation, the difference between a grave containing a human body and a refilled empty pit...
bachelor thesis 2019
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Radulovic, Aleksandra (author), Sladic, Dubravka (author), Govedarica, Miro (author), Ristic, Aleksandar (author), Jovanovic, Dušan (author)
Survey, establishment and maintenance of utility network in Serbia are defined by the Law on state survey and cadastre (2009), the Rulebook on survey and utility network cadastre (2010), the Manual for implementation and maintenance of the utility network digital database (2005) and the Law on the procedure for registration in the real estate...
conference paper 2018
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Yang, B. (author), Slob, E.C. (author)
We present a data driven method of full waveform inversion in one dimension. This means that the inversion is carried out as a sequence of processing steps. The first step is known as Marchenko redatuming. In this step we retrieve focusing functions from the measured data. In the second step we isolate the last event in the focusing function to...
conference paper 2018
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Slob, E.C. (author)
In one dimension, full waveform inversion is shown to be a linear problem under several conditions. I show that if the magnetic permeability can be assumed constant and electric conductivity to be zero, measuring the magnetic field at the surface or in the air suffices as input data. I present the theory using integral equations that describe...
conference paper 2018
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Zhou, F. (author), Miorali, M. (author), Slob, E.C. (author), Hu, Xiangyun (author)
The recently developed smart well technology allows for sectionalized production control by means of downhole inflow control valves and monitoring devices. We consider borehole radars as permanently installed downhole sensors to monitor fluid evolution in reservoirs, and it provides the possibility to support a proactive control for smart...
journal article 2018
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Wang, J. (author), Aubry, P.J. (author), Yarovoy, Alexander (author)
Ground penetrating radar imaging from the data acquired with arbitrarily oriented dipole-like antennas is considered. To take into account variations of antenna orientations resulting in spatial rotation of antenna radiation patterns and polarizations of transmitted fields, the full-wave method that accounts for the near-, intermediate-, and...
journal article 2018
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Feld, R. (author)
Ground-penetrating radar (GPR) is a non-destructive method that images the subsurface using radar. A transmitter generates a radar pulse. This signal propagates into the ground where it reflects against subsurface heterogeneities, and travels back to the surface. A receiver records the reflected signal. The reflected signal contains information...
doctoral thesis 2017
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Slob, E.C. (author), Wapenaar, C.P.A. (author)
We present a three-dimensional scheme that can be used to compute the electromagnetic impulse response between any two subsurface points from surface reflection data measured at a single surface of a lossless medium. The scheme first computes a virtual vertical radar profile using the Marchenko scheme from which focusing wavefields are...
conference paper 2017
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Zhang, L. (author), Slob, E.C. (author), van der Neut, J.R. (author), Staring, M. (author), Wapenaar, C.P.A. (author)
We present a one-dimensional lossless scheme to compute an image of a dissipative medium from two single-sided reflection responses. One reflection response is measured at or above the top reflector of a dissipative medium and the other reflection response is computed as if measured at or above the top reflector of a medium with negative...
conference paper 2016
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Benthem, M. (author)
A wide range of wildlife has their habitat around and within levees or other types of embankment structures. In the Netherlands the burrowing of the muskrat causes internal and external erosion, altering the geometry of the earthen structure. As often century-old embankments protect the densely populated land against the water, the burrowing can...
master thesis 2015
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Hunziker, J.W. (author), Thorbecke, J.W. (author), Slob, E.C. (author)
conference paper 2014
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Slob, E.C. (author), Hunziker, J.W. (author), Thorbecke, J.W. (author), Wapenaar, C.P.A. (author)
conference paper 2014
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Slob, E.C. (author), Wapenaar, C.P.A. (author)
Recently a new theory has been developed to retrieve a wavefield generated by a source on the surface and recorded at a point in the subsurface without the need for a receiver at that subsurface location. The scheme is presented for three-dimensional wavefields. It decomposes the electromagnetic field in up- and downgoing electric fields and in...
journal article 2013
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Van Langen, J. (author)
Dit onderzoek is opgezet om kennis bij te dragen aan achterliggende oorzaken van de suboptimalisatie op de levensduurkosten van voortgezet onderwijs scholen. De twee hoofdvragen van dit onderzoek zij als volgt geformuleerd; Waardoor worden kostenoverschrijdingen op de levensduurkosten veroorzaakt bij recent gebouwde voortgezet onderwijs scholen?...
master thesis 2012
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Neimann, J.S. (author)
Onderzoek naar het waarderen van duurzaam vastgoed met behulp van de instrumenten BREEAM-NL, GPR-gebouw en Greencalc met een focus op nieuwbouw utiliteitsbouw gebouwen. Het onderzoek laat zien hoe de instrumenten worden toegepast en hoe de duurzaamheidwaarderingen zich met elkaar verhouden.
master thesis 2012
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Azodi, H. (author)
Ground Penetrating Radar (GPR) is a promising technology to detect buried objects beneath or near ground surface. To achieve high-resolution and accurate enough images, the transmitting antenna (TX) in this technology is required to radiate a highly-correlated narrow width pulse towards ground where the targets are hidden. For this application,...
master thesis 2010
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Poley, H.G. (author)
This Thesis covers the expermimental evaluation of a resistively-loaded bow-tie antenna for the purpose of utility detection with GPR. Numerical analysis has been carried out with a designed resistively-loaded printed dipole antenna to gain a better understanding of the subsurface scattering phenomena, loading effects of the ground and other...
master thesis 2010
Searched for: subject%3A%22GPR%22
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