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Techen, Holger (author), Krimm, J. (author), Knaack, U. (author)
The increasing migration into cities leads to an increasing number of people stressed by noise. More and more people are moving into urban settings comprised of multiple noise sources and hard reflective glass and steel facades. The omnidirectional arrangement of noise sources like airborne noise or car traffic noise and their reflection on the...
book chapter 2018
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Zhang, L. (author), Slob, E.C. (author)
We retrieve transmission compensated subsurface primary reflections from the reflection response measured at the surface. This is achieved by filtering the reflection response. The application of this scheme does not require model information. In this process, the reflection response is convolved and correlated with itself. The result after each...
conference paper 2018
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Price, R.A. (author), Wrigley, Cara (author), Matthews, Judy (author)
Design as a creative way of framing and solving problems is considered an essential business capability in an innovation era. Organizations with design capability can improve the lives of their customers, stakeholders and employees by creating valuable products, services and experiences. Design-led innovation is a framework that assists...
journal article 2018
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Boullenger, B. (author)
The theory of seismic interferometry predicts that the cross-correlation (and possibly summation) between seismic recordings at two separate receivers allows the retrieval of an estimate of the inter-receiver response, or Green's function, from a virtual source at one of the receiver positions. Ideally, the recordings must consist of the...
doctoral thesis 2017
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Minato, S. (author), Ghose, R. (author)
We explore the potential of multi-angle AVO inversion of P-P and P-S reflections from a fracture to estimate fracture proper- ties. Although AVO analysis of welded interface like geologi- cal layer boundaries is common, the use of AVO variations for nonwelded boundaries like fractures is yet to be investigated. We conduct laboratory experiments...
conference paper 2016
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Verdel, Arie (author), Wedemeijer, Harry (author), Paap, B (author), Vandeweijer, Vincent (author), Weemstra, C. (author), Jousset, Philippe (author), Franke, Steven (author), Blanck, Hanna (author), Águstsson, K. (author), Hersir, Gylfi Páll (author)
We present results from the application of ambient noise seismic interferometry (ANSI) to data that were recorded continuously in 2014 and 2015 at Iceland’s peninsula Reykjanes. The objective of this study is the retrieval of reflected body waves (P-waves) that provide high-resolution velocity-versus-depth as well as subsurface structural...
conference paper 2016
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Kadu, Ajinkya (author), van Leeuwen, Tristan (author), Mulder, W.A. (author)
<br/>In seismic exploration, the delineation of large bodies with hard exterior contrasts but nearly constant interior properties is a challenge. Examples include salt diapirs, salt slabs, anhydrite or basalt layers. Salt geometries are of particular interest because they often have hydrocarbon reservoirs on their sides or underneath. This...
conference paper 2016
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Boullenger, B. (author), Verdel, A. (author), Paap, B. (author), Thorbecke, J.W. (author), Draganov, D.S. (author)
Seismic interferometry applied to ambient-noise measurements allows the retrieval of the seismic response between pairs of receivers. We studied ambient-noise seismic interferometry (ANSI) to retrieve time-lapse reflection responses from a reservoir during CO2 geologic sequestration, using the case of the experimental site of Ketzin, Germany. We...
journal article 2015
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Boullenger, B. (author), Wapenaar, C.P.A. (author), Draganov, D.S. (author)
Seismic interferometry applied to surface reflection data (with source and receivers at the surface) allows to retrieve virtual-source gathers at the position of receivers, where no source was shot. As a result of the crosscorrelation of all primary and multiple reflections, the virtual-source gathers contain retrieved physical reflections as...
conference paper 2014
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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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Van den Bos, J.P. (author)
Results of labtests on reflection and transmission trough a vertical permeable breakwater for the purpose of validating mathematical models. In the laboratory a model of a vertical, permeable breakwater was constructed with elastocoast and tests were done with regular and irregular waves.
report 2014
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Fan, H. (author)
Natural or hydraulic fractures are of major importance for the productivity of hydrocarbon reservoirs. Besides fracture detection, also the aperture and extension of the fractures are essential for a correct reservoir productivity estimate. There are many ways to detect and measure fractures, such as borehole televiewers and electrical borehole...
doctoral thesis 2014
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Bharadwaj, P. (author), Mulder, W.A. (author), Drijkoningen, G.G. (author)
Least-squares inversion of seismic reflection waveforms can reconstruct remarkably detailed models of the Earth’s subsurface. However, the cycle-skipping associated with the highfrequency waveforms are responsible for spurious local minima in its objective function. Therefore, it is often difficult for descent methods to converge to the true...
journal article 2013
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Bugarini, G. (author), Reimer, M.E. (author), Zwiller, V. (author)
We report on the optical properties of single quantum dots in nanowires probed along orthogonal directions. We address the same quantum dot from either the nanowire side or along the nanowire axis via reflection on a micro-prism. The collected photoluminescence intensity from nanowires lying on a substrate is improved 3-fold using the prism as...
journal article 2012
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Cruz, P.J.S. (author), Veer, F.A. (author), Carvalho, P.L.L. (author)
The application of glass in contemporary architecture explores perceptual phenomenon that intentionally change the way we experience space. SANAA'S recent work uses glass in a radical way, proposing a renewed approach to transparency. The Toledo Glass Pavilion, with most spaces defined by glass walls, presents an intense visual experience. The...
conference paper 2010
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Souverein, L.J. (author)
Shock wave boundary layer interactions (SWBLI) are a common phenomenon in transonic and supersonic flows. The presence of shock waves, induced by specific geometrical configurations, causes a rapid increase of the pressure, which can lead to flow separation. Examples of such interactions are found in amongst others rocket engine nozzles and on...
doctoral thesis 2010
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Draganov, D. (author)
One of the goals of exploration geophysics is to obtain an image of the subsurface. In petroleum exploration and near-surface geophysics, this is best achieved using reflected waves. For this, a controlled seismic or electromagnetic source is placed at the surface, activated, and the wavefields that it creates are recorded at the surface after...
doctoral thesis 2007
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van der Burg, D.W. (author)
To estimate rock and pore-fluid properties of oil and gas reservoirs in the subsurface, techniques can be used that invert seismic data. Hereby, the detailed information about the reservoir that is available at well locations, such as the thickness and porosity of individual layers, is extrapolated to all locations in the reservoir on the basis...
doctoral thesis 2007
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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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Xu, M. (author), Urbach, H.P. (author), De Boer, D.K.G. (author), Cornelissen, H.J. (author)
The application of wire grid polarizers as efficient polarizing beam splitters for visible light is studied. The large differences between the transmissivity for different polarizations are explained qualitatively by using the theory of metallic wave guides. The results of rigorous calculations obtained by using the finite element method are...
journal article 2005
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