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Sprung, D. (author), Sucher, E. (author), van Eijk, A.M.J. (author), Eisele, C. (author), Seiffer, D. (author), Stein, K. (author)A field trial was performed in the arid scrub area of White Sands, NM /USA in October 2017 investigating the atmospheric influence on imaging and sensor performance. In this paper we focus on the strength of optical turbulence. Optical turbulence is described by the structure function parameter of the refractive index Cn 2. It is responsible for...conference paper 2018
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Withagen, J.C.J.G. (author), Annema, A.J. (author), Nauta, B. (author), van Vliet, F.E. (author)An 8-10 GHz X-band upconversion quadrature mixer stage implemented in 250 nm SiGe BiCMOS is presented. Orthogonality of the spurious responses caused by clock feed through, I/Q mismatch and baseband harmonics after self-mixing was exploited to realize a baseband calibration scheme reducing all in-band spurs down to below -73dBc, for baseband...conference paper 2016
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Scholtes-Timmerman, M.J. (author), Bijlsma, S. (author), Fokkert, M.J. (author), Slingerland, R. (author), van Veen, S.J.F. (author)Self-monitoring of glucose is important for managing diabetes. Noninvasive glucose monitors are not yet available, but patients would benefit highly from such a device. We present results that may lead to a novel, point-of-care noninvasive system to measure blood glucose based on Raman spectroscopy. A hospitalized cohort of 111 subjects was...article 2014
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Kong, H. (author), Wang, M. (author), Venema, K. (author), Maathuis, A. (author), van der Heijden, R. (author), van der Greef, J. (author), Xu, G. (author), Hankemeier, T. (author), TNO Kwaliteit van Leven (author)A high-performance liquid chromatography-high resolution Fourier transform ion cyclotron resonance mass spectrometry (HPLC-FTICR-MS) method was developed to investigate the metabolism of ginsenosides in in vitro models of the gastro-intestinal tract. The metabolites were identified by high-resolution tandem mass spectrometry. Degradation and...article 2009
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Wang, J. (author), van der Heijden, R. (author), Spijksma, G. (author), Reijmers, T. (author), Wang, M. (author), Xu, G. (author), Hankemeier, T. (author), van der Greef, J. (author), TNO Kwaliteit van Leven (author)A matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) method was developed for the high throughput and robust qualitative profiling of alkaloids in Fuzi-the processed lateral roots of the Chinese herbal medicine Aconitum carmichaeli Debx (A. carmichaeli). After optimization, powdered roots - without any further sample...article 2009
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Ganzevles, R.A. (author), Fokkink, R. (author), van Vliet, T. (author), Cohen Stuart, M.A. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)Based on earlier reported surface rheological behaviour two factors appeared to be important for the functional behaviour of mixed protein/polysaccharide adsorbed layers at air/water interfaces: (1) protein/polysaccharide mixing ratio and (2) formation history of the layers. In this study complexes of β-lactoglobulin (positively charged at pH 4...article 2008
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Bobeldijk, I. (author), Karlsson, D. (author), Pronk, A. (author), Gonsalves, J. (author), Hekman, M. (author), van de Lagemaat, D. (author), Preller, L. (author), Heederik, D. (author), Skarping, G. (author), TNO Kwaliteit van Leven (author)An adapted method for the quantitative determination of isocyanates in air was implemented and validated in-house. The method was based on air sampling using an impinger flask containing di-n-butylamine (DBA) in toluene and a glass fibre filter in series. The DBA derivatives were determined using liquid chromatography and tandem mass...article 2008
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van Dam, E.R. (author), Kooij, R.E. (author), TNO Informatie- en Communicatietechnologie (author)The spectral radius of a graph (i.e., the largest eigenvalue of its corresponding adjacency matrix) plays an important role in modeling virus propagation in networks. In fact, the smaller the spectral radius, the larger the robustness of a network against the spread of viruses. Among all connected graphs on n nodes the path Pn has minimal...article 2007
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Varady, G. (author), Freiding, A. (author), Eloholma, M. (author), Halonen, L. (author), Walkey, H. (author), Goodman, T. (author), Alferdinck, J.W.A.M. (author), TNO Defensie en Veiligheid (author)The authors represent a research consortium which has adopted a task performance based approach for nighttime driving to obtain mesopic spectral sensitivity functions. This study describes investigations based on discrimination threshold techniques and compares the results with those obtained from detection threshold measurements. It forms a...article 2007
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Azarpeyvand, M. (author), Self, R.H. (author), Golliard, J. (author), TNO Industrie en Techniek (author)To calculate the noise emanating from a turbulent flow (such as a jet flow) using Lighthill's analogy, knowledge concerning the unsteady characteristics of the turbulence is required. Specifically, the form of the turbulent correlation tensor together with various time and length-scales and convection velocities are needed. However, if we are...conference paper 2006
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TNO Defensie en Veiligheid (author), Briottet, X. (author), Boucher, Y. (author), Dimmeler, A. (author), Malaplate, A. (author), Cini, A. (author), Diani, M. (author), Bekman, H.H.P.T. (author), Schwering, P.B.W. (author), Skauli, T. (author), Kasen, I. (author), Renhorn, I. (author), Klasén, L. (author), Gilmore, M. (author), Oxford, D. (author)Optical imaging, including infrared imaging, generally has many important applications, both civilian and military. In recent years, technological advances have made multi- and hyperspectral imaging a viable technology in many demanding military application areas. The aim of the CEPA JP 8.10 program has been to evaluate the potential benefit of...conference paper 2006
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Kralj, S. (author), van Geel-Schutten, G.H. (author), Faber, E.J. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), TNO Kwaliteit van Leven (author)Glucansucrase or glucosyltransferase (GTF) enzymes of lactic acid bacteria display high sequence similarity but catalyze synthesis of different α-glucans (e.g., dextran, mutan, alternan, and reuteran) from sucrose. The variations in glucosidic linkage specificity observed in products of different glucansucrase enzymes appear to be based on...article 2005
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Gerini, G. (author), Bruni, S. (author), Neto, A. (author), Maci, S. (author), TNO Defensie en Veiligheid (author)A novel type of broadband integrated array scanning in one plane is proposed. Such arrays are aimed to meet the requirements typically set for airborne Synthetic Aperture Radars, while allowing the highest degree of integration between the T/R modules and radiating elements. The array is composed by broad-band leaky-wave slot elements radiating...conference paper 2005
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Boelens, H.F.M. (author), Eilers, P.H.C. (author), Hankemeier, T. (author), TNO Kwaliteit van Leven (author)Spectroscopy is a fast and rich analytical tool. On many occasions, spectra are acquired of two or more sets of samples that differ only slightly. These data sets then need to be compared and analyzed, but sometimes it is difficult to find the differences. We present a simple and effective method that detects and extracts new spectral features...article 2005
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Hinnen, K.J.G. (author), Verhaegen, M. (author), Doelman, N.J. (author), TNO Industrie en Techniek (author)This paper presents a subspace-based identification algorithm for estimating the state-space quadruple [A,B,C,D] of a minimum-phase spectral factor from matrix-valued power spectrum data. For a given pair [A,C] with A stable, the minimum-phase property is guaranteed via the solution of a conic linear programming (CLP) problem. In comparison with...article 2005
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Skibsted, E.T.S. (author), Boelens, H.F.M. (author), Westerhuis, J.A. (author), Smilde, A.K. (author), Broad, N.W. (author), Rees, D.R. (author), Witte, D.T. (author), TNO Kwaliteit van Leven (author)Net analyte signal statistical quality control (NAS-SQC) is a new methodology to perform multivariate product quality monitoring based on the net analyte signal approach. The main advantage of NAS-SQC is that the systematic variation in the product due to the analyte (or property) of interest is separated from the remaining systematic variation...article 2005
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Zagers, N.P.A. (author), van Norren, D. (author)We measured the amplitude of the directional component of the bleached fundus reflectance, the so-called optical Stiles-Crawford effect, as a function of wavelength. The directional reflectance originates from within the outer segments of the photoreceptors. Thus only two anterior absorbers are of importance: Macular pigment and the crystalline...article 2004
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Trofimova, D. (author), de Jongh, H.H.J. (author), TNO Voeding (author)Maillard products of β-lactoglobulin (βLg) and fructose oligosaccharide (FOS) were obtained in different degrees of modification depending on incubation time and pH. By use of a variety of biochemical and spectroscopic tools, it was demonstrated that the modification at limited degrees does not significantly affect the secondary, tertiary, and...article 2004
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Neto, A. (author), Maci, S. (author), TNO Fysisch en Elektronisch Laboratorium (author)This sequence of papers presents an analytical closed form for the Green's function of an infinite slot printed between two different homogeneous dielectrics. This first part is devoted to the derivation of the slot magnetic current and to the discussion of the relevant physical implications. The Fourier spectrum of the magnetic current is...article 2003
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Bakker, D.P. (author), Klijnstra, J.W. (author), Busscher, H.J. (author), van der Mei, H.C. (author), TNO Industrie (author)Adhesion of three marine bacterial strains, i.e. Marinobacter hydrocarbonoclasticus, Psychrobacter sp. and Halomonas pacifica with different cell surface hydrophobicities was measured on glass in a stagnation point flow chamber. Prior to bacterial adhesion, the glass surface was conditioned for 1 h with natural seawater collected at different...article 2003
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