Searched for: subject%3A%22anisotropy%22
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van den Dries, M.A. (author), Lamballais, S. (author), El Marroun, H. (author), Pronk, A. (author), Spaan, S. (author), Ferguson, K.K. (author), Longnecker, M.P. (author), Tiemeier, H. (author), Guxens, M. (author)
Background: Prenatal exposure to organophosphate (OP) pesticides associate with impaired neurodevelopment in humans and animal models. However, much uncertainty exists about the brain structural alterations underlying these associations. The objective of this study was to determine whether maternal OP pesticide metabolite concentrations in urine...
article 2020
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Slot, H.M. (author), Nicoreac, M. (author), Maljaars, J. (author)
Rolled steel plates and sections are often applied in structures in such a way that the principal load direction corresponds with the rolling direction. Examples are beams, arches, or pylons of bridges, supporting beams of ship decks, and the main elements of crane structures. However, some types of structure are subjected to a multiaxial stress...
article 2020
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Pahlavan, P.L. (author), Zhang, F. (author), Blacquière, G. (author), Yang, Y. (author), Hordijk, D. (author)
Interaction of ultrasonic waves with partially-closed surface-breaking cracks in concrete structures has been studied. Measurements have been conducted on a reinforced concrete beam containing various mechanical-load-induced cracks and compared with the baseline measurements at those locations. Influence of crack width, incident angle of waves...
article 2018
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Rocha, I.B.C.M. (author), Raijmaekers, S. (author), van der Meer, F.P. (author), Nijssen, R.P.L. (author), Fischer, H.R. (author), Sluys, L.J. (author)
A combined experimental and numerical investigation is conducted on the anisotropic water diffusion behaviour of unidirectional glass/epoxy composites. Experimental diffusivity values are obtained by immersing thin material slices for each of its planes of orthotropy extracted from a thick composite panel and interphase measurements are...
article 2017
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Silvestri, F. (author), Cifola, L. (author), Gerini, G. (author)
In this paper, we present the full process of designing anisotropic metamaterial (MM) wide angle impedance matching (WAIM) layers. These layers are used to reduce the scan losses that occur in active phased arrays for large scanning angles. Numerical results are provided to show the improvement in performances that such layers can ensure. The...
article 2016
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van de Ruit, K. (author), Katsouras, I. (author), Bollen, D. (author), Van Mol, T. (author), Janssen, R.A.J. (author), de Leeuw, D.M. (author), Kemerink, M. (author)
For its application as transparent conductor in light-emitting diodes and photovoltaic cells, both the in-plane and out-of-plane conductivity of PEDOT:PSS are important. However, studies into the conductivity of PEDOT:PSS rarely address the out-of-plane conductivity and those that do, report widely varying results. Here a systematic study of the...
article 2013
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Zhang, X. (author), Paulssen, H. (author)
The Gulf of California, which forms part of the Pacific-North American plate boundary, is an ideal place to investigate upper mantle dynamics in a continental rifting area. With 19 seismic stations located around the gulf, the NARS-Baja experiment (2002-2008) was designed to image its crustal and mantle structure. Here we present results of a...
article 2012
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van den Berg, D. (author), Barink, M. (author), Giesen, P. (author), Meinders, E.R. (author), Yakimets, I. (author)
Thin polymer substrates are promising materials for flexible electronics with many advantages. However, the dimensional stability of polymer substrates is low. Nowadays, this is overcome by laminating polymer substrates onto a rigid carrier. Nevertheless, carrier-less processing will be a foreseen next step for future manufacturing of plastic...
article 2011
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van den Berg, D. (author), Barink, M. (author), Giesen, P. (author), Meinders, E.R. (author), Yakimets, I. (author), TNO Industrie en Techniek (author)
Thin polymer substrates are promising materials for flexible electronics with many advantages. However, the dimensional stability of polymer substrates is low. Nowadays, this is overcome by laminating polymer substrates onto a rigid carrier. Nevertheless, carrier-less processing will be a foreseen next step for future manufacturing of plastic...
article 2010
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Chadwick, R.A. (author), Noy, D. (author), Arts, R. (author), Eiken, O. (author), TNO Bouw en Ondergrond (author)
Since its inception in 1996, the CO2 injection operation at Sleipner has been monitored by 3D time-lapse seismic surveys. Striking images of the CO2 plume have been obtained, showing a multi-tier feature of high reflectivity, interpreted as arising from a number of thin layers of CO2 trapped beneath thin, intra-reservoir mudstones. The topmost...
article 2009
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Michels, J.J. (author), de Winter, S.H.P.M. (author), Symonds, L.H.G. (author), TNO Industrie en Techniek (author)
We demonstrate that artificial neural network modeling is a viable tool to predict the processing dependence of gravure printed light-emitting polymer layers for flexible OLED lighting applications. The (local) thickness of gravure printed light-emitting polymer (LEP) layers was analyzed using microdensitometry, after which the data was used to...
article 2009
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Janssen, G.C.A.M. (author), Abdalla, M.M. (author), van Keulen, F. (author), Pujada, B.R. (author), van Venrooy, B. (author), TNO Industrie en Techniek (author)
Stress in a thin film on a flexible substrate induces a curvature of the substrate. Usually the substrate is orders of magnitude thicker than the film, leading to small and purely elastic deformation of the substrate. In this case, the Stoney equation yields the stress in the film from the measured curvature of the substrate. The Stoney equation...
article 2009
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Visser, K. (author), Trampert, J. (author), Kennett, B.L.N. (author), TNO Bouw en Ondergrond (author)
We thank Stuart Crampin for his interest in our recent paper but respectfully disagree when he argues that our measurements are not appropriate for inferring mantle anisotropy. The approximations we made are common and perfectly acceptable for the considered frequency band. The comment ignores a large part of the literature which investigated...
article 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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Kudryashova, E.V. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author), KvL (author)
The possibility of modulating the mesoscopic properties of food colloidal systems by the dielectric constant is studied by determining the impact of small amounts of ethanol (10%) on the adsorption of egg white ovalbumin onto the air-water interface in the absence and presence of pectin. The adsorption kinetics was monitored using tensiometry....
article 2008
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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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Kudryashova, E.V. (author), Visser, A.J.W.G. (author), van Hoek, A. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)
To stabilize air-water interfaces, as in foams, the adsorption of surface-active components is a prerequisite. An approach to controlling the surface activity of proteins is noncovalent complex formation with a polyelectrolyte in the bulk phase. The molecular properties of egg white ovalbumin in a complex with pectin in the bulk solution and at...
article 2007
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Balguid, A. (author), Rubbens, M.P. (author), Mol, A. (author), Bank, R.A. (author), Bogers, A.J.J.C. (author), van Kats, J.P. (author), de Mol, B.A.J.M. (author), Baaijens, F.P.T. (author), Bouten, C.V.C. (author), TNO Kwaliteit van Leven (author)
A major challenge in tissue engineering of functional heart valves is to determine and mimic the dominant tissue structures that regulate heart valve function and in vivo survival. In native heart valves, the anisotropic matrix architecture assures sustained and adequate functioning under high-pressure conditions. Collagen, being the main load...
article 2007
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Nardes, A.M. (author), Kemerink, M. (author), Janssen, R.A.J. (author), Bastiaansen, J.J.A.M. (author), Kiggen, N.M.M. (author), Langeveld, B.M.W. (author), van Breemen, A.J.J.M. (author), de Kok, M.M. (author), TNO Industrie en Techniek (author)
The anisotropic conductivity of spin-coated poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films by temperature-dependent conductivity measurements, has been analyzed. A detailed 3D morphological model was derived from topographic scanning tunneling microscopy (STM) and cross-sectional atomic force microscopy (AFM)...
article 2007
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Thielen, L. (author), Hanjalić, K. (author), Jonker, H. (author), Manceau, R. (author), Technisch Physische Dienst TNO - TH (author)
We present numerical computations of flow and heat transfer in multiple jets impinging normally on a flat heated surface, obtained with a new second-moment turbulence closure combined with an elliptic blending model of non-viscous wall blocking effect. This model provides the mean velocity and turbulent stress fields in very good agreement with...
article 2005
Searched for: subject%3A%22anisotropy%22
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