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Nateghizad, M. (author), Veugen, P.J.M. (author), Erkin, Z. (author), Lagendijk, R.L. (author)Protocols for securely testing the equality of two encrypted integers are common building blocks for a number of proposals in the literature that aim for privacy preservation. Being used repeatedly in many cryptographic protocols, designing efficient equality testing protocols is important in terms of computation and communication overhead. In...conference paper 2018
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- Blom, K.C.H. (author), Dol, H.S. (author), Kokkeler, A.B.J. (author), Smit, G.J.M. (author) conference paper 2016
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Geurts, C.P.W. (author), van Bentum, C.A. (author), Bronkhorst, A.J. (author), Hulsbosch-Dam, C.E.C. (author)Wind loads on permeable building skins are determined by the pressure difference between the external pressures and the pressures inside the cavity. External pressures are given in current building codes for a wide variety of building shapes, location on the building envelope, effects of detailing etcetera. For the pressures in the cavity and...conference paper 2015
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Pisano, E. (author), Silvestri, F. (author), Gerini, G. (author), Lancellotti, V. (author), Galdi, V. (author)We propose the design of a dielectric flat lens for visible wavelengths, capable of efficiently focus the incident field at a given distance. Our approach relies on the recently proposed exploitation of high-index dielectric resonators with spectrally overlapping electric and magnetic dipole resonances of equal strength. This allows the design...conference paper 2015
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van Bentum, C.A. (author), Geurts, C.P.W. (author)Wind-induced pressure differences over rain screens are determined by the external pressures and the pressures inside the cavity. Minimizing this pressure difference decreases the risk of water leakage and also helps to minimize the local loads on the façade elements. Current rules to determine the wind loads on such structures are based on very...conference paper 2015
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Wu, T. (author), Toet, A. (author)A simple power-logarithm histogram modification operator is proposed to enhance digital image contrast. First a logarithm operator reduces the effect of spikes and transforms the image histogram into a smoothed one that approximates a uniform histogram while retaining the relative size ordering of the original bins. Then a power operator...conference paper 2014
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Cannelli, L (author), Leus, G. (author), Dol, H.S. (author), van Walree, P.A. (author)In this paper a multiband transceiver designed for underwater channels is presented. Multi-branch filtering at the receiver is used to leverage the diversity offered by a multi-scale multi-lag scenario. The multi-branch bank of filters is constructed by estimating scale and delay coefficients through an initial preamble composed by a maximum...conference paper 2013
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van Bentum, C.A. (author), Kalkman, I.M. (author), Geurts, C.P.W. (author)A series of wind tunnels tests are presented on a cube, equipped with a permeable outer layer. The influences of cavity depth and opening width have been investigated. This research shows that a wind direction of 75 degrees with respect to the considered panel gives the highest differential pressures relevant for cladding. For smooth approach...conference paper 2012
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Werkhoven, R.J. (author), Sillekens, W.H. (author), van Lieshout, J.B.J.M. (author)Biomedical applications are an emerging field of interest for magnesium technology, envisioning biodegradable implants that resorb in the human body after having cured a particular medical condition (such as artery clogging or bone fractures). This challenges research in a sense that the materials to be used need to dissolve in vivo in a...conference paper 2011
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Lefter, I. (author), Rothkrantz, L.J.M. (author), Wiggers, P. (author), van Leeuwen, D.A. (author), TNO Defensie en Veiligheid (author)We explore possibilities for enhancing the generality, portability and robustness of emotion recognition systems by combining data-bases and by fusion of classifiers. In a first experiment, we investigate the performance of an emotion detection system tested on a certain database given that it is trained on speech from either the same database,...conference paper 2010
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van Walree, P.A. (author), Leus, G. (author), TNO Defensie en Veiligheid (author)Abstract—In this paper, a multicarrier modulation scheme is presented for acoustic communication at low signal-to-noise ratios (SNRs). User bits are put through a rate 1/3 turbo encoder and interleaved with periodic training bits. A maximal-length sequence is prefixed for signal detection and equalizer convergence, and the resulting bit stream...article 2009
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van Walree, P.A. (author), Jenserud, T. (author), Smedsrud, M. (author), TNO Defensie en Veiligheid (author)In-situ measurements of the scattering function are used to drive a channel simulator developed in the context of underwater acoustic telemetry. Two operation modes of the simulator are evaluated. A replay mode is accomplished by interpolation of measured impulse responses. A second, stochastic mode delivers multiple realizations of a given...article 2008
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Sangfelt, E. (author), Nordenvaad, M.L. (author), Olofsson, N. (author), Nilsson, B. (author), van Walree, P.A. (author), Oberg, T. (author), TNO Defensie en Veiligheid (author)We introduce a multi-channel soft input/soft output receiver for underwater communication that performs joint iterative channel estimation, linear equalization, and decoding. The transmitted symbols were encoded using a turbo coded bit-sequence. Our method exploits the gain present in the turbo code through a feed-back of soft information from...conference paper 2007
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- TNO Arbeid (author), Nicot, .M. (author), Houtman, I.L.D. (author) report 2007
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TNO Kwaliteit van Leven (author), Dronkers, J. (author), Wanner, R.A. (author)Het gemiddelde gezinsinkomen van de eerste generatie-immigranten in Europa en Noord-Amerika is lager dan dat van autochtonen. En dat valt niet te verklaren op basis van hun hoeveelheid human capital (opleiding, leeftijd, geslacht, woonplaats). Dit geldt vooral voor immigranten uit de tweede en derde wereld, die ook nog een lagere opbrengt hebben...article 2006
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TNO Bouw (author), Geurts, C.P.W. (author), van Staalduinen, P.C. (author), de Wit, M.S. (author)The most vulnerable parts of buildings with respect to wind loading are facades and roofs. Current standards on wind loading provide data to determine design loads for the elements in facades and roofs. These data are available for a limited number of simple building shapes. Up to now there is no common procedure to determine local loads for...article 2004
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van Gijzen, M.B. (author), van Walree, P.A. (author), TNO Physics and Electronics Lab, Hague, Netherlands (author)BPSK signals have been defined for transmission through a shallow-water acoustic communication channel. The signals were accompanied by two displaced carriers to facilitate carrier recovery. To correct for the adverse effects of time spreading, a pseudo-random learning sequence was transmitted ahead of the communication signal. The signal...conference paper 2000
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Pot, F.D. (author)In de maatschappelijke discussie over inkomensverschillen staan drie thema's centraal. Rechtvaardige inkomensverdeling, gelijke beloning van mannen en vrouwen, en differentiatie van beloning. Beloningssystemen zijn geen waardevrije technieken, maar uitkomsten van machtsverhoudingen tussen werkgevers en werknemers. Deze studie heeft als onderwerp...doctoral thesis 1988
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Walraven, P.L. (author), Michon, J.A. (author), Instituut voor Zintuigfysiologie TNO (author)General considerations about the use of convex mirrors indicate that they may be very useful to enlarge the field of view. There seems to be no need to use smaller values for the radius of the mirror than 1000 mm. A reaction time experiment is described in which plane mirrors of equal size at different positions on the fender are used. There are...conference paper 1969