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Janssen, T.T. (author)As ocean surface waves radiate into shallow coastal areas and onto beaches, their lengths shorten, wave heights increase, and the wave shape transforms from nearsinusoidal to the characteristic saw-tooth shapes at the onset of breaking; in the ensuing breaking process the wave energy is cascaded to small-scale turbulent motions in the surf zone....doctoral thesis 2006
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Janssen, G.C.A.M. (author), Tichelaar, F.D. (author), Visser, C.C.G. (author)Stress in hard films is the net sum of tensile stress generated at the grain boundaries, compressive stress due to ion peening, and thermal stress due to the difference in thermal expansion of the coating and substrate. The tensile part due to grain boundaries is thickness dependent. The other two contributions are not thickness dependent....journal article 2006
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Janssen, O.T.A. (author), Urbach, H.P. (author), 't Hooft, G.W. (author)The excitation of surface plasmons by subwavelength slits in metal films is studied using a rigorous diffraction model. It is shown that the plasmon is launched by a slit in antiphase with the incident magnetic field. This is true independent of slit width and of the metal used. Using this phase information, maxima and minima in transmission are...journal article 2006
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- Janssen, M. (author), Klischewski, R. (author), Demirkan, H. (author) conference paper 2007
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Janssen, M.F.W.H.A. (author), Hjort-Madsen, K. (author)National enterprise architectures (NEA) promise to fill the gap between policy and implementation. NEAs are embedded within an institutional environment consisting of active players capable of responding strategically and innovatively to architectural initiatives, which might complicate NEA adoption. In this paper we analyze the efforts of two...conference paper 2007
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Janssen, M.F.W.H.A. (author), Van der Duin, P. (author), Wagenaar, R.W. (author), Bicking, M. (author), Wimmer, M.A. (author), Dawes, S. (author), Petrauskas, R. (author)E-government research is currently at a stage of consolidation and new orientation. Smaller steps of government modernization have in part been successfully implemented; larger ones still lie ahead of us. Within an EC funded project, a roadmap for egovernment is being defined. Thereby, scenario building about the future is being used to grasp...conference paper 2007
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- Kamminga, J.D. (author), Janssen, G.C.A.M. (author) journal article 2007
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- Janssen, O.T.A. (author), Urbach, H.P. (author), 't Hooft, G.W. (author) journal article 2007
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Pujada, B.R. (author), Tichelaar, F.D. (author), Janssen, G.C.A.M. (author)Tungsten carbide-diamond like carbon (WC-DLC) multilayer coatings have been prepared by sputter deposition from a tungsten-carbide target and periodic switching on and off of the reactive acetylene gas flow. The stress in the resulting WC-DLC multilayers has been studied by substrate curvature. Periodicity and microstructure have been studied by...journal article 2007
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Van Dongeren, A. (author), Battjes, J.A. (author), Janssen, T. (author), Van Noorloos, J. (author), Steenhauer, K. (author), Steenbergen, G. (author), Reniers, A. (author)The growth rate, shoreline reflection, and dissipation of low?frequency waves are investigated using data obtained from physical experiments in the Delft University of Technology research flume and by parameter variation using the numerical model Delft3D?SurfBeat. The growth rate of the shoaling incoming long wave varies with depth with an...journal article 2007
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- Janssen, G.C.A.M. (author) public lecture 2007
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Janssen, M.F.W.H.A. (author)The service-oriented enterprise (SOE) is often considered as the future model of organization. Yet there is little empirical research in this domain and limited insight into the benefits and disadvantages. In this paper we analyze a case study of a large, multinational banking company. This company is modularized in functions and business...conference paper 2008
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Wimmer, M. (author), Codagnone, C. (author), Janssen, M.F.W.H.A. (author)E-government research has become a recognized research domain and many policies and strategies are formulated for e-government implementations. Most of these target the next few years and limited attention has been giving to the long term. The eGovRTD2020, a European Commission co-funded project, investigated the future research on e-government...conference paper 2008
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Janssen, O.T.A. (author), Van Haver, S. (author), Janssen, A.J.E.M. (author), Braat, J.J.M. (author), Urbach, H.P. (author), Pereira, S.F. (author)Results are presented of mask imaging using the Extended Nijboer-Zernike (ENZ) theory of diffraction. We show that the efficiency of a mask imaging algorithm, derived from this theory, can be increased. By adjusting the basic Finite Difference Time Domain (FDTD) algorithm, we can calculate the near field of isolated mask structures efficiently,...conference paper 2008
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Janssen, T.T. (author), Herbers, T.H.C. (author), Battjes, J.A. (author)We present a stochastic model for the evolution of random ocean surface waves in coastal waters with complex seafloor topography. First, we derive a deterministic coupled-mode model based on a forward scattering approximation of the nonlinear mild slope equation; this model describes the evolution of random, directionally spread waves over fully...journal article 2008
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Van Haver, S. (author), Janssen, O.T.A. (author), Braat, J.J.M. (author), Janssen, A.J.E.M. (author), Urbach, H.P. (author), Pereira, S.F. (author)In this paper we introduce a new mask imaging algorithm that is based on the source point integration method (or Abbe method). The method presented here distinguishes itself from existing methods by exploiting the through-focus imaging feature of the Extended Nijboer-Zernike (ENZ) theory of diffraction. An introduction to ENZ-theory and its...conference paper 2008
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Sorokin, D.Y. (author), Van den Bosch, P.L.F. (author), Abbas, B. (author), Janssen, A.J.H. (author), Muyzer, G. (author)Thiopaq biotechnology for partial sulfide oxidation to elemental sulfur is an efficient way to remove H2S from biogases. However, its application for high-pressure natural gas desulfurization needs upgrading. Particularly, an increase in alkalinity of the scrubbing liquid is required. Therefore, the feasibility of sulfide oxidation into...journal article 2008
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Irahhauten, Z. (author), Dacuna, J. (author), Janssen, G.J.M. (author), Nikookar, H. (author), Yarovoy, A.G. (author), Ligthart, L.P. (author)Ultrawideband (UWB) technology is an attractive alternative for short-range applications, e.g., wireless personal area networks. In these applications, transmit and receive antennas are very close to each other and the far-field condition assumed in most of the link budget models may not be satisfied. Under near-field conditions, variations in...journal article 2008
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Christova, C.G. (author), Stouwdam, J.W. (author), Eijkemans, T.J. (author), Silov, A.Y. (author), Van der Heijden, R.W. (author), Kemerink, M. (author), Janssen, R.A.J. (author), Salemink, H.W.M. (author)Remarkable photoluminescence enhancement (PLE) in submonolayer films of PbSe nanocrystals (NCs) upon continuous illumination was observed. The intensity increase from films on InP substrates was highest in vacuum, while for films on Si/SiO2 substrates the PLE was stronger in air. The magnitude of the PLE was found to depend on the excitation...journal article 2008
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Klievink, B. (author), Janssen, M. (author)Government organizations operate a variety of channels to interact with citizens and businesses. Advances in information and communication technology enabled an online presence and more direct interactions. A focus on efficiency makes organizations encourage the use of electronic channels over traditional channels. Also, intermediaries in the...journal article 2008