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Jin, J. (author), Pang, M. (author), Segers, A. (author), Han, W. (author), Fang, L. (author), Li, B. (author), Feng, H. (author), Lin, H.X. (author), Liao, H. (author)Last spring, super dust storms reappeared in East Asia after being absent for one and a half decades. The event caused enormous losses in both Mongolia and China. Accurate simulation of such super sandstorms is valuable for the quantification of health damage, aviation risks, and profound impacts on the Earth system, but also to reveal the...article 2022
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Dol, H. (author), Blom, K. (author)It is a persistent misunderstanding that underwater acoustic communication at short range is always easier than at long range. Same for (quasi) stationary configurations being always easier than dynamic ones. This paper gives examples of high-rate links in very shallow water at several kilometres distance, as well as difficult communication...conference paper 2021
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van den Hoogen, B. (author), Uijens, W. (author), den Hollander, R. (author), Huizinga, W. (author), Dijk, J. (author), Schutte, K. (author)Automatic detection and tracking of persons and vehicles can greatly increase situational awareness in many military applications. Various methods for detection and tracking have been proposed so far, both for rule-based and learning approaches. With the advent of deep learning, learning approaches generally outperform rule-based approaches. Pre...conference paper 2020
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van Eekeren, A.W.M. (author), Dijk, J. (author), Schutte, K. (author)In general, long range detection, recognition and identification in visual and infrared imagery are hampered by turbulence caused by atmospheric conditions. The amount of turbulence is often indicated by the refractive-index structure parameter Cn 2. The value of this parameter and its variation is determined by the turbulence effects over the...conference paper 2014
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van Eekeren, A.W.M. (author), Schutte, K. (author), Dijk, J. (author), Schwering, P.B.W. (author), van Iersel, M. (author), Doelman, N.J. (author)In general, long range visual detection, recognition and identification are hampered by turbulence caused by atmospheric conditions. Much research has been devoted to the field of turbulence compensation. One of the main advantages of turbulence compensation is that it enables visual identification over larger distances. In many (military)...conference paper 2012
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de Jong, A.N. (author), van Eijk, A.M.J. (author), Benoist, K.W. (author), Gunter, W.H. (author), Vrahimis, G. (author), October, F.J. (author)Knowledge on the marine boundary layer is of importance for the prediction of the optical image quality obtained from long range targets. One property of the boundary layer, that can be studied rather easily by means of optical refraction measurements, is the vertical temperature profile. This profile can be compared with the profile, as...conference paper 2011
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van Eekeren, A.W.M. (author), Schutte, K. (author), Dijk, J. (author), Schwering, P.B.W. (author)Long range object identification needs visual identification over large distances. However, atmospheric turbulence does hinder long range imaging. Therefore it is crucial to compensate the visual artifacts due to atmospheric turbulence. In this paper we propose a new method to compensate these turbulence effects, thus enabling identification at...conference paper 2011
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Schwering, P.B.W. (author), TNO Defensie en Veiligheid (author)The presence of asymmetric threats in coastal and harbor environments, as well as in open waters is increasing. Potential suicide bombers and pirates need to be stopped at an early stage to prevent harm. Hence accurate situational awareness is essential. Detection and in particular recognition of such asymmetric threat is a complicated task....public lecture 2010
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Gholamrezaie, F. (author), Mathijssen, S.G.J. (author), Smits, E.C.P. (author), Geuns, T.C.T. (author), van Hal, P.A. (author), Ponomarenko, S.A. (author), Flesch, H.-G. (author), Resel, R. (author), Cantatore, E. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author), TNO Industrie en Techniek (author)We report on a two-dimensional highly ordered self-assembled monolayer (SAM) directly grown on a bare polymer surface. Semiconducting SAMs are utilized in field-effect transistors and combined into integrated circuits as 4-bit code generators. The driving force to form highly ordered SAMs is packing of the liquid crystalline molecules caused by...article 2010
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Schaap, M. (author), Otjes, R.P. (author), Weijers, E.P. (author), TNO Bouw en Ondergrond (author)Secondary inorganic aerosol, most notably ammonium nitrate and ammonium sulphate, is an important contributor to ambient particulate mass and provides a means for long range transport of acidifying components. The modelling of the formation and fate of these components is challenging. Especially, the formation of the semi-volatile ammonium...article 2010
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Halswijk, W.H.C. (author), TNO Defensie en Veiligheid (author)The Variable-Flow Ducted Rocket (VFDR) is a type of ramjet that can control the fuel mass flow to the combustion chamber. It combines the high efficiency at high-speed of ramjets with the throttlability of turbofans, and this makes VFDR propulsion an excellent choice for high speed, long range missiles. This is especially true because the...conference paper 2009
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TNO Informatie- en Communicatietechnologie (author), Li, H. (author)This paper presents a comprehensive statistical analysis of a variety of workloads collected on production clusters and Grids. The applications are mostly computational-intensive and each task requires single CPU for processing data, which dominate the workloads on current production Grid systems. Trace data obtained on a parallel supercomputer...article 2009
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Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author)The combination of frequency-modulated continuous-wave (FMCW) technology and synthetic aperture radar (SAR) techniques leads to lightweight cost-effective imaging sensors of high resolution. One limiting factor to the use of FMCW sensors is the well-known presence of nonlinearities in the transmitted signal. This results in contrast- and range...article 2007
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van der Eerden, F.J.M. (author), van den Berg, F. (author), van 't Hof, J. (author), van Arkel, E. (author), TNO Industrie en Techniek (author)A blast absorber test was conducted at the Aberdeen Test Centre from 13 to 17 June 2005. The test was set up to determine the absorbing and shielding effect of a gravel pile, of 1.5 meters high and 15 by 15 meters wide, on blasts from large weapons: e.g. armor, artillery or demolition. The blast was simulated with single brick C-4 charges of 570...conference paper 2006
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Ainslie, M.A. (author), TNO Defensie en Veiligheid (author)Long-range acoustic propagation in isothermal conditions is considered, involving multiple reflections from the sea surface. If the sea is calm there is almost perfect reflection and hence little loss of acoustic energy or coherence. The effect of wind is to increase propagation loss due to rough surface scattering and the interaction with near...article 2005
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Guicherit, R. (author), Bakker, D.J. (author), de Voogt, P. (author), van den Berg, F. (author), van Dijk, H.F.G. (author), van Pul, W.A.J. (author), TNO Milieu, Energie en Procesinnovatie (author)The Health Council of the Netherlands organised an international workshop on the fate of pesticides in the atmosphere and possible approaches for their regulatory environmental risk assessment. Approximately forty experts discussed what is currently known about the atmospheric fate of pesticides and major gaps in our understanding were...article 1999
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de Leeuw, G. (author), Vignati, E. (author), TNO Fysisch en Elektronisch Laboratorium (author)Aerosol particle size distributions were measured on the Swedish island Ostergamsholm, aboutarticle 1998
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Memmesheimer, M. (author), Ebel, A. (author), Roemer, M. (author), Instituut voor Milieuwetenschappen TNO (author)Results from two air quality models (LOTOS, EURAD) have been used to analyse the contribution of the different terms in the continuity equation to the budget of ozone, NO(x) and PAN. Both models cover large parts of Europe and describe the processes relevant for tropospheric chemistry and dynamics. One of the models is designed to simulate...article 1997