Searched for: subject%3A%22wave%255C%2Bspectra%22
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ZHANG, XINYI (author)
Infragravity (IG) waves are long waves whose frequency ranges between 0.005 Hz to 0.04 Hz. The directional properties of IG waves are essential in various engineering fields, but few spectra reconstruction methods have been tested to be robust for the last forty years. In this study, artificial wave signals were created to check the accuracy and...
student report 2022
document
Skandali, D. (author), Lourens, E. (author), Ogink, R.H.M. (author)
A vessel's response to waves is dependent on a large number of parameters, some of which are both frequency and direction dependent. To predict vessel response, these parameters are used to construct response amplitude operators (RAOs) that act as transfer functions between the directional wave spectra and the motion spectra of the vessel. In...
journal article 2020
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Bergmans, P.M.P. (author)
Comparative study into the effects of applying different spectral wave models to workability prediction of the Ampelmann A-type. Single peaked (wind sea), double peaked (wind sea and swell), and hindcast wave spectra are compared.
master thesis 2017
document
Harenberg, P.F.J. (author)
Jumbo maritime has almost 50 years of experience in the heavy shipping industry. In the past two decades Jumbo has developed into an offshore installation company by equipping the Fairplayer with a DP2 system. The Fairplayer has two 900 [ton] Huisman cranes. However, due to insufficient static stability a stabilization pontoon is required to...
master thesis 2016
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Oosterlo, P. (author)
In this thesis, a method was developed, with which the infragravity waves and morphological changes of a sandy foreshore are included in the calculation of the probability of dike failure due to wave overtopping. Constructing a natural foreshore in front of the dike can be an attractive and innovative method to decrease the failure probability....
master thesis 2015
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Ren, Y. (author), Hayton, D.J. (author), Hovenier, J.N. (author), Cui, M. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Shi, S.C. (author), Kao, T.Y. (author), Hu, Q. (author), Reno, J.L. (author)
We demonstrate an experimental scheme to simultaneously stabilize the frequency and amplitude of a 3.5 THz third-order distributed feedback quantum cascade laser as a local oscillator. The frequency stabilization has been realized using a methanol absorption line, a power detector, and a proportional-integral-derivative (PID) loop. The amplitude...
journal article 2012
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Ramanandan, G.K.P. (author), Ramakrishnan, G. (author), Planken, P.C.M. (author)
Terahertz (THz) transmission spectroscopy is used to measure the oxidation kinetics of copper thin films evaporated on silicon substrates. The transmission of broadband THz pulses from 1 to 7 THz through the copper film is measured while it gets oxidized at an elevated temperature in ambient air. The change in the transmitted THz electric field...
journal article 2012
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Schins, J.M. (author)
The retrieval of the primary (subpicosecond) photoproducts in small-band two-dimensional time-domain terahertz spectroscopy has succeeded only in a few model systems, due to the complicated correlation between the two time parameters. We show that the nature of the primary photoproducts is revealed upon differentiating the measured time-domain...
journal article 2010
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Ren, Y. (author), Hovenier, J.N. (author), Higgins, R. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Shi, S.C. (author), Bell, A. (author), Klein, B. (author), Williams, B.S. (author), Kumar, S. (author), Hu, Q. (author), Reno, J.L. (author)
A terahertz (THz) heterodyne spectrometer is demonstrated based on a quantum cascade laser (QCL) as a local oscillator (LO) and an NbN hot electron bolometer as a mixer, and it is used to measure high-resolution molecular spectral lines of methanol (CH3OH) between 2.913–2.918 THz. The spectral lines are taken from a gas cell containing methanol...
journal article 2010
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Wesson, M.A. (author)
Real coastal waves measured at 4 different locations in the world were analyzed in detail. Long travelled swell measured in the Pacific coast of Costa Rica, wind swell from the Atlantic coast of Costa Rica, short period wind waves from the Ebro Delta in Mediterranean coast of Spain, and waves measured during the passing of Hurricane Wilma near...
master thesis 2010
document
Verhagen, H.J. (author), Van Vledder, G.P. (author), Eslami Arab, S. (author)
Modern design formula for coastal structures (like rock stability formula and overtopping formula use wave parameters (H2% and Tm-1,0) which are not readily available from standard boundary condition wave data. For transforming values like Hs and Tp to the parameters used in the new formulas, often-fixed conversion factors are used. However,...
conference paper 2008
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Schins, J.M. (author), Hendry, E. (author), Bonn, M. (author), Muller, H.G. (author)
We present an analytical expression for the observed signal in time- and phase-resolved pump-probe studies, with particular emphasis on terahertz time-domain spectroscopy. Maxwell’s equations are solved for the response of damped, harmonic oscillators to a driving probe field in the perturbative regime. Our analytical expressions agree with the...
journal article 2007
document
Hartgerink, P.E. (author)
The discovery of great oil reserves located under the northern part of the Caspian Sea has lead to an increased interest in the wave climate in this area. Statistical analysis of wave measurements is insufficient to determine reliable design wave conditions on the northern part of the Caspian Sea, because the amount of available wave...
master thesis 2005
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Groeneweg, J. (author), Dongeren, A.R. van (author)
report 2002
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van Gent, M.R.A. (author)
report 2002
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Gent, M.R.A. van (author)
report 1999
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Somers, C.M.G. (author)
report 1998
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De Jong, J.C.M. (author)
Due to the new act on the water defense the Directorate-General of Public Works and Water Management of the Netherlands is required to evaluate the design conditions for the coastal defenses every five years. To do this evaluation a model is needed to translate offshore wave conditions to nearshore design conditions. For such transformations...
master thesis 1997
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Eldeberky, Y. (author)
doctoral thesis 1996
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Spaan, G.B.H. (author), Vledder, G.P. van (author), Hurdle, D.P. (author)
report 1996
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