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Sudol, W. (author), Dirksen, P. (author), Henneken, V.A. (author), Dekker, R. (author), Louwerse, M.C. (author)
A large aperture CMUT transducer array is formed of a plurality of adjacently located tiles of CMUT cells. The adjacent edges of the tiles are formed by an anisotropic etch process, preferably a deep reactive ion etching process which is capable of cutting through the die and its substrate while maintaining vertical edges in close proximity to...
patent 2016
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Post, J.A.B. (author), Pothof, I.W.M. (author), Dirksen, J. (author), Baars, E. J. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)
Gully pots are essential assets designed to relief the downstream system by trapping solids and attached pollutants suspended in runoff. This study applied a methodology to develop a quantitative gully pot sedimentation and blockage model. To this end, sediment bed level time series from 300 gully pots, spanning 15 months, were collected. A...
journal article 2016
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Dirksen, J. (author), Van der Steen, A. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)
Previous research learned that the reproducibility of visual sewer inspection data is poor (Dirksen et al.). Further research by Arjan et al. showed that the applied coding system has a major influence on the reproducibility. The aim of this study was to give relevant suggestions to improve the quality by defining defects that are in the current...
conference paper 2013
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Dirksen, J. (author)
The study into the influence of (differential) settlement on the functioning of sewer systems was initiated to search for additional criteria to make sewer pipe replacement decisions more sensible. For this Amsterdam was used as a case study. Like many megacities (e.g. Jakarta, Bangkok, Tokyo, Shanghai), Amsterdam is situated in a delta area. As...
doctoral thesis 2013
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Dirksen, J. (author), Baars, E. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)
conference paper 2012
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Dirksen, S. (author)
This thesis is dedicated to the study of a class of probabilistic inequalities, called Rosenthal inequalities. These inequalities provide two-sided estimates for the p-th moments of the sum of a sequence of independent, mean zero random variables in terms of a suitable norm on the sequence itself. Rosenthal inequalities are named after H.P....
doctoral thesis 2011
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Ten Veldhuis, J.A.E. (author), Dirksen, J. (author), Clemens, F.H.L.R. (author)
Data from call centres at two municipalities were analysed in order to quantify flooding frequencies and associated flood risks for three main failure mechanisms causing urban flooding. The aim was to find out whether current operational strategies are efficient for flood prevention and if directions for improvement could be found. The results...
conference paper 2009
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Dirksen, P. (author), Braat, J.J.M. (author), Janssen, A.J.E.M. (author), Leeuwestein, A. (author), Matsuyama, T. (author), Noda, T. (author)
Phase Measurement Interferometers (PMI) are widely used during the manufacturing process of high quality lenses. Although they have an excellent reproducibility and sensitivity, the set-up is expensive and the accuracy of the measurement needs to be checked frequently. This paper discusses an alternative lens metrology method that is based on an...
conference paper 2006
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Dirksen, P. (author), Braat, J. (author), Janssen, A.J.E.M. (author)
journal article 2006
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Braat, J.J.M. (author), Dirksen, P. (author), Janssen, A.J.E.M. (author), Van Haver, S. (author), Van de Nes, A.S. (author)
The judgment of the imaging quality of an optical system can be carried out by examining its through-focus intensity distribution. It has been shown in a previous paper that a scalar-wave analysis of the imaging process according to the extended Nijboer–Zernike theory allows the retrieval of the complex pupil function of the imaging system,...
journal article 2005
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Dirksen, P. (author), Braat, J.J.M. (author), Janssen, A.J.E.M. (author), Leeuwesteijn, A. (author)
conference paper 2005
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Braat, J.J.M. (author), Dirksen, P. (author), Janssen, A.J.E.M. (author), Van de Nes, A.S. (author)
Poster presentation with Philips Research Laboratories
journal article 2004
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Dirksen, P. (author), Braat, J. (author), Janssen, A.J.E.M. (author), Leeuwestein, A. (author), Kwinten, H. (author), Van Steenwinckel, D. (author)
This study presents an experimental method to determine the resist parameters that are at the origin of a general blurring of the projected aerial image. The resist model includes the effects of diffusion in the horizontal plane and a second cause for image blur that originates from a stochastic variation of the focus parameter. The used...
conference paper 2004
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Lumbreras, M. (author), Protas, J. (author), Jebbari, S. (author), Dirksen, G.J. (author), Schoonman, J. (author)
journal article 1986
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Lumbreras, M. (author), Protas, J. (author), Jebbari, S. (author), Dirksen, G.J. (author), Schoonman, J. (author)
journal article 1986
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Dirksen, H.J. (author)
doctoral thesis 1958
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