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Bloom, J.G.P. (author), Stelwagen, U. (author), Mast, A. (author), Volker, A.W.F. (author), TNO Industrie en Techniek (author)Risk based inspection strategies rely on detailed knowledge of the performance of inspection techniques. The objective of the "POD generator" project is to develop a numerical modeling approach to assess the effectiveness of specific inspection techniques. Simulation offers flexibility and reliability at acceptable costs. Therefore numerical...conference paper 2009
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te Raa, L.A. (author), Lam, F.P.A. (author), Schouten, M.W. (author), Janmaat, J. (author), TNO Defensie en Veiligheid (author)Spatial and temporal variations in sound speed can have substantial effects on sound propagation and hence sonar performance. Operational oceanographic models can provide forecasts of oceanographic variables as temperature, salinity and sound speed up to several days ahead. These four-dimensional forecasts can be used as input for a sonar...conference paper 2009
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Hwang, E. (author), Kim, K.J. (author), Roijers, F. (author), Choi, B.D. (author), TNO Informatie- en Communicatietechnologie (author)In the centralized polling mode in IEEE 802.16e, a base station (BS) polls mobile stations (MSs) for bandwidth reservation in one of three polling modes; unicast, multicast, or broadcast pollings. In unicast polling, the BS polls each individual MS to allow to transmit a bandwidth request packet. This paper presents an analytical model for the...article 2009
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Madsen, C.B. (author), Hattersley, S. (author), Buck, J. (author), Gendel, S.M. (author), Houben, G.F. (author), Hourihane, J.OB. (author), Mackie, A. (author), Mills, E.N.C. (author), Nørhede, P. (author), Taylor, S.L. (author), Crevel, R.W.R. (author), TNO Kwaliteit van Leven (author)A workshop was organised to investigate whether risk assessment strategies and methodologies used in classical/conventional toxicology may be used for risk assessment of allergenic foods, to discuss the advantages and limitations of different approaches and to determine the research needed to move the area forward. Three possible approaches to...article 2009
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Mandjes, M. (author), Roijers, F. (author), TNO Informatie- en Communicatietechnologie (author)The c-congestion period, defined as a time interval in which the number of customers is larger than c all the time, is a key quantity in the design of communication networks. Particularly in the setting of M/M/∞ systems, the analysis of the duration of the congestion period, D<sub>c</sub>, has attracted substantial attention; related quantities...article 2009
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van Wees, J.-D. (author), Juez-Larre, J. (author), Mijnlieff, H. (author), Kronimus, A. (author), van Gessel, S. (author), Kramers, L. (author), Obdam, A. (author), Verweij, H. (author), Bonté, D. (author), TNO Bouw en Ondergrond (author)In the recent years the use of geothermal energy through implementation of low enthalpy geothermal production systems for both electricity and heating have been growing rapidly in north-western Europe. Geothermal exploration and production takes largely place in sedimentary basins at depths from 2 to 5 km. Geothermal activities can take...conference paper 2009
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- Visser, K. (author), Trampert, J. (author), Lebedev, S. (author), Kennett, B.L.N. (author), TNO Bouw en Ondergrond (author) article 2008
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Lu, Y. (author), Kuipers, F. (author), Janic, M. (author), van Mieghem, P. (author), TNO Informatie- en Communicatietechnologie (author)Increased Internet speeds together with new possibilities for tailor-made television services have spurred the interest in providing television via the Internet. Several television services are readily available and both IP-layer and application-layer (P2P) technologies are used. When disregarding commercial influences, customers will choose for...bookPart 2008
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van der Hoeven, B.L. (author), Pires, N.M.M. (author), Warda, H.M. (author), Putter, H. (author), Quax, P.H.A. (author), Schalij, M.J. (author), Jukema, J.W. (author), TNO Kwaliteit van Leven (author)Diabetes mellitus (DM) is a strong predictor of in-stent restenosis. This may be due to a higher level of vascular inflammation. We hypothesized that diabetic patients will benefit from dexamethasone-eluting stents, since local inflammation and consequently neointimal growth are suppressed and no systemic side effects will occur. Methods: 21...article 2008
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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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Kruizinga, A.G. (author), Briggs, D. (author), Crevel, R.W.R. (author), Knulst, A.C. (author), Bosch, L.M.C.v.d. (author), Houben, G.F. (author), TNO Kwaliteit van Leven (author), KvL (author)Previously, TNO developed a probabilistic model to predict the likelihood of an allergic reaction, resulting in a quantitative assessment of the risk associated with unintended exposure to food allergens. The likelihood is estimated by including in the model the proportion of the population who is allergic, the proportion consuming the food and...article 2008
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Eijkemans, M. (author), Mommers, M. (author), de Vries, S.I. (author), van Buuren, S. (author), Stafleu, A. (author), Bakker, I. (author), Thijs, C. (author), TNO Kwaliteit van Leven (author)OBJECTIVE. Prevalence of asthma and overweight has increased simultaneously during the past decades. Several studies have reported an association between these two health problems, but it is unclear whether this relation is causal. We hypothesize that children with asthmatic symptoms are less physically active, which may contribute to the...article 2008
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Anitori, L. (author), Srinivasan, R. (author), Rangaswamy, M. (author), TNO Defensie en Veiligheid (author), IEEE (author)In this paper the STAP detector based on the lowrank approximation of the normalized adaptive matched filter (LRNAMF) is investigated for its false alarm probability (FAP) performance. An exact formula for the FAP of the LRNAMF detector is derived using the g-method estimator [4]. The non CFAR behavior of this detector is shown via simulations...conference paper 2008
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- Krom, A.H.M. (author), Mast, A. (author), Volker, A.W.F. (author), Bloom, J.G.P. (author), Technisch Physische Dienst TNO - TH (author) conference paper 2008
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TNO Industrie en Techniek (author), Landucci, G. (author), Molag, M. (author), Reinders, J. (author), Tugnoli, A. (author), Cozzani, V. (author)Distribution and storage of liquefied pressurised gases is a critical safety issue, often resulting in a very high individual and societal risk, at least in densely populated zones. Several risk assessments pointed out that this is mostly due to the possible occurrence of a Boiling Liquid Expanding Vapour Explosions (BLEVE) of the tank that may...conference paper 2008
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van Buuren, S. (author), TNO Kwaliteit van Leven (author)The standard deviation score (SDS) is a powerful tool for screening for growth-related problems. However, referral rules of the type 'if SDS(Y)<d, then refer' (for some constant d) are not optimal for answering the question: 'Does this child with measurement Y belong to the reference or to the diseased population?'. If the growth standard for...article 2008
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TNO Kwaliteit van Leven (author), Sivan, S.S. (author), Wachtel, E. (author), Tsitron, E. (author), Sakkee, N. (author), van der Ham, F. (author), Groot, J.de (author), Roberts, S. (author), Maroudas, A. (author)Knowledge of rates of protein turnover is important for a quantitative understanding of tissue synthesis and catabolism. In this work, we have used the racemization of aspartic acid as a marker for the turnover of collagen obtained from healthy and pathological human intervertebral disc matrices. We measured the ratio of the D- and L-isomers in...article 2008
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Naus, H.W.L. (author), TNO Defensie en Veiligheid (author)The emission of electromagnetic radiation by localized complex electric charge and current distributions is studied. A statistical formalism in terms of general dynamical multipole fields is developed. The appearing coefficients are treated as stochastic variables. Hereby as much as possible a priori physical knowledge is exploited. First...article 2007
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Mons, M.N. (author), van der Wielen, J.M.L. (author), Blokker, E.J.M. (author), Sinclair, M.I. (author), Hulshof, K.F.A.M. (author), Dangendorf, F. (author), Hunter, P.R. (author), Medema, G.J. (author), TNO Kwaliteit van Leven (author)The volume of cold tap water consumed is an essential element in quantitative microbial risk assessment. This paper presents a review of tap water consumption studies. Study designs were evaluated and statistical distributions were fitted to water consumption data from The Netherlands, Great Britain, Germany and Australia. We conclude that the...article 2007
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Spanjersberg, M.Q.I. (author), Kruizinga, A.G. (author), Rennen, M.A.J. (author), Houben, G.F. (author), TNO Kwaliteit van Leven (author)In order to assess the risk of unintended exposure to food allergens, traditional deterministic risk assessment is usually applied, leading to inconsequential conclusions as 'an allergic reaction cannot be excluded'. TNO therefore developed a quantitative risk assessment model for allergens based on probabilistic techniques resulting in a more...article 2007