Searched for: subject%3A%22wave%255C+reflection%22
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Gijón Mancheño, A. (author), Jansen, W. (author), Uijttewaal, W.S.J. (author), Reniers, A.J.H.M. (author), van Rooijen, A. A. (author), Suzuki, T. (author), Etminan, V. (author), Winterwerp, J.C. (author)
Mangrove vegetation constitutes a natural coastal defence against waves and erosion. Despite their protective role, mangrove ecosystems have experienced continuous degradation over the last decades due to human causes. At retreating mangrove coastlines, bamboo structures are built to create new habitat for mangrove colonization. Existing...
journal article 2021
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Hoving, J.S. (author), Metrikine, A. (author)
This contribution considers the wave reflection at the interface between a discrete lattice that describes the nonlinear near-field response to a dynamic load and a matching system that describes the linear far-field response. The near-field system is modelled as a one-dimensional discrete system of particles that is capable of describing...
conference paper 2017
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Van Vledder, G.P. (author), Zijlema, M. (author)
The determination of wave conditions in partly sheltered areas is a challenging task for coastal engineers. Knowledge about these conditions is important for the design of coastal structures, the planning and operation of ports. Numerical models play an important role in the assessment of these conditions. Various types of models have been...
conference paper 2014
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Van Neer, P.L.M.J. (author), Danilouchkine, M.G. (author), Verweij, M.D. (author), Demi, L. (author), Voormolen, M.M. (author), Van der Steen, A.F.W. (author), De Jong, N. (author)
In medical ultrasound, fundamental imaging (FI) uses the reflected echoes from the same spectral band as that of the emitted pulse. The transmission frequency determines the trade-off between penetration depth and spatial resolution. Tissue harmonic imaging (THI) employs the second harmonic of the emitted frequency band to construct images....
journal article 2011
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Oumeraci, H. (author), Staal, T. (author), Pfoertner, S. (author), Kudella, M. (author), Schimmels, S. (author), Verhagen, H.J. (author)
Elastomeric bonded permeable revetments, also called PBA (Polyurethane bonded aggregate) revetments, are highly porous structures made of mineral aggregates (e.g. crushed stones) which are durably and elastically bonded by polyurethane (PU). Despite their numerous advantages as compared to conventional revetments and the large experience...
conference paper 2010
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Schakel, M.D. (author), Smeulders, D. (author)
The dispersion relation for seismoelectric wave propagation in poroelastic media is formulated in terms of effective densities comprising all viscous and electrokinetic coupling effects. Using Helmholtz decomposition, two seismoelectric conversion coefficients are derived, for an incident P-wave upon an interface between a compressible fluid and...
journal article 2010
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Kuster, M. (author)
The methods investigated for the room volume estimation are based on geometrical acoustics, eigenmode, and diffuse field models and no data other than the room impulse response are available. The measurements include several receiver positions in a total of 12 rooms of vastly different sizes and acoustic characteristics. The limitations in...
journal article 2008
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Van Walree, P.A. (author), Ainslie, M.A. (author), Simons, D.G. (author)
Echo energies of single-beam echo sounders are inverted for the sediment mean grain size via a combination of theoretical and empirical relationships. In situ measurements of the seafloor mass density have revealed the presence of a thin transition layer between the water and the sediment. Within this layer, which has a thickness of order 1 cm,...
journal article 2006
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De Hoop, A.T. (author), Lam, C.H. (author), Kooij, B.J. (author)
Closed-form analytic time-domain expressions are obtained for the acoustic pressure associated with the reflection of a monopole point-source excited impulsive acoustic wave by a planar boundary with absorptive and dispersive properties. The acoustic properties of the boundary are modeled as a local admittance transfer function between the...
journal article 2005
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Spek, M.R. (author)
A new and innovative idea to reduce the wave reflection in front of vertical walls is by means of dynamic breakwaters, which dissipate wave energy by using moving elements. These moving elements in combination with a spring and a 'dashpor' to dissipate energy reduce the wave reflection in a wide range offrequencies (see Figure 2-1, 2-2 for...
master thesis 2001
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Kieftenburg, A.T.M.M. (author)
The reflection implemented in SWAN version 40.11 is just specular reflection. It gives the mirror image of the action density spectrum, cutting it off for all directions that are not directed towards the obstacle and multiplying it by the reflection factor C_r^2 (square because the reflection factor is w.r.t. wave height). To improve the...
report 2001
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Suastika, I.K. (author)
Blockage of waves by a current can occur if waves are propagating on a spatially varying opposing current in which the velocity is increasing in the wave propagation direction. The ongoing waves become shorter and steeper while they are propagating against the current. Blocking occurs at the location where the opposing current strength is the...
report 1999
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Liu, P.L.F. (author), Cho, Y.S. (author)
Using a multiple-scale perturbation method we derive a set of governing equations describing the transformation of long wave and short wave components in a wave group. These equations are derived from Boussinesq equations with the assumption that the length scale of wave group modulation is in the same order of magnitude as that of the bottom...
report 1993
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Veldman, J.J. (author)
report 1993
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Sluys, L.J. (author), De Borst, R. (author), Muhlhaus, H.B. (author)
journal article 1993
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Franco, L. (author)
Italy is often considered as a mother country of vertical breakwaters for harbour protection, since they have been widely used all along our coasts long since. An updated location map is given in fig. 1, which also shows the position of the directional wave recording stations of the existing Italian network. The most common vertical breakwaters...
report 1992
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Sluys, L.J. (author), De Borst, R. (author)
journal article 1992
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Veldman, J.J. (author)
report 1991
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Veldman, J.J. (author)
report 1991
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Veldman, J.J. (author)
report 1988
Searched for: subject%3A%22wave%255C+reflection%22
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