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Kozhevnikov, A. (author), Kunnen, R.P.J. (author), van Baars, G.E. (author), Clercx, H.J.H. (author)Purpose – This study aims to examine the feasibility of feedforward actuation of the recoater blade position to alleviate the resin surface nonuniformity while moving over deep-to-shallow transitions of submerged (already cured) geometric features. Design/methodology/approach – A two-dimensional computational fluid dynamics (CFD) model has been...article 2022
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Shankar Verma, A. (author), Jiang, Z. (author), Caboni, M. (author), Verhoef, J.P. (author), van der Mijle Meijer, H.J. (author), Castro, S.G.P. (author), Teuwen, J.J.E. (author)Rain-induced leading-edge erosion of wind turbine blades is associated with high repair and mainte nance costs. For efficient operation and maintenance, erosion models are required that provide estimates of blade coating lifetime at a real scale. In this study, a statistical rainfall model is established that de scribes probabilistic...article 2022
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- Lebrun, M. (author), Nandillon, R. (author), Miard, F. (author), Bourgerie, S. (author), Visser, R. (author), Morabito, D. (author) article 2021
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Small, J. (author), van Hoek, C. (author), van der Does, F. (author), Seinen, A.B. (author), Melzer, S. (author), Tromp, P.C. (author), van der Laan, S. (author)A method has been developed to screen large numbers (~103–104 per sample) of coarse airborne dust particles for the occurrence of Pb-rich phases, together with quantification of the particles’ mineralogy, chemistry, and inferred provenance. Using SEM-EDS spectral imaging (SI) at 15 kV, and processing with the custom software PARC, screening of...article 2021
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Deumel, S. (author), van Breemen, A.J.J.M. (author), Gelinck, G. (author), Peeters, B. (author), Maas, J. (author), Verbeek, R. (author), Shanmugam, S. (author), Akkerman, H. (author), Meulenkamp, E. (author), Huerdler, J.E. (author), Acharya, M. (author), García-Batlle, M. (author)To realize the potential of artificial intelligence in medical imaging, improvements in imaging capabilities are required, as well as advances in computing power and algorithms. Hybrid inorganic–organic metal halide perovskites, such as methylammonium lead triiodide (MAPbI3), offer strong X-ray absorption, high carrier mobilities (μ) and long...article 2021
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Koodly Ravishankara, A. (author), Özdemir, H. (author), van der Weide, E. (author)The surface of wind turbine blades are prone to degradation due to exposure to the elements. Rain, hail, insects are among the many causes of turbine blade degradation or erosion. Surface degradation of the wind turbine blades leads to a reduction in the aerodynamic performance, resulting in power losses. The effect of surface degradation is...article 2021
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Shankar Verma, A. (author), Jiang, Z. (author), Ren, Z. (author), Caboni, M. (author), Verhoef, H. (author), van der Mijle-Meijer, H. (author), Castro, S.G.P. (author), Teuwen J.J.E., (author)Rain-induced leading-edge erosion (LEE) of wind turbine blades (WTBs) is associated with high repair and maintenance costs. The effects of LEE can be triggered in less than 1 to 2 years for some wind turbine sites, whereas it may take several years for others. In addition, the growth of erosion may also differ for different blades and turbines...article 2021
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Kozhevnikov, A. (author), Kunnen, R.P.J. (author), van Baars, G.E. (author), Clercx, H.J.H. (author)The leading edge bulge is a known defect in stereolithography with free-surface recoating. It is a resin excess that remains after deposition over a deep-to-shallow topographic transition, the leading edge of the cavity. In this paper, we explore an approach based on changing the gap between the recoating blade and the previously cured layer to...article 2021
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Bracesco, A.E.A. (author), Burgess, C.H. (author), Todinova, A. (author), Zardetto, V. (author), Koushik, D. (author), Kessels, M.M. (author), Dogan, I. (author), Weijtens, C.H.L. (author), Veenstra, S. (author), Andriessen, R. (author), Creatore, M. (author)The chemistry of the interface between the metal halide perovskite absorber and the charge transport layer affects the performance and stability of metal halide perovskite solar cells (PSCs). The literature provides several examples of poor PSC conversion efficiency values, when electron transport layers (ETLs), such as SnO2 and TiO2, are...article 2020
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- Tajdari, F. (author), Berkhoff, A.P. (author), van der Zee, R.A.R. (author), de Boer, A. (author) article 2020
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van Kempen, S.E. (author), Khanbareh, H. (author), Groen, P. (author), Hol, J.M.A.M. (author), van der Zwaag, S. (author)A novel method based on the Virtual Particle Mori–Tanaka (VPMT) is developed to predict the effective electro-elastic properties, d33 and g33, of structured piezoelectric particulate composites with improved accuracy by means of a single parameter related to the spatial distribution of imperfectly aligned rod-like PZT particles. The VPMT method...article 2020
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Stuber, V.L. (author), Deutz, D.B. (author), Bennett, J. (author), Cannel, D. (author), de Leeuw, D.M. (author), van der Zwaag, S. (author), Groen, P. (author)Vibrational piezoelectric energy harvesters are being investigated to replace batteries in embedded sensor systems. The energy density that can be harvested depends on the figure of merit, d 33 g 33 , where d 33 and g 33 are the piezoelectric charge and voltage coefficient. Commonly used piezoelectric materials are based on inorganic ceramics,...article 2019
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Zardetto, V. (author), Senes, A. (author), Najafi, M. (author), Zhang, D. (author), Joly, R. (author), Chippari, M. (author), Arneouts, T. (author), Poodt, P. (author), Veenstra, S. (author), Andriessen, R. (author)In order to bring the organo-lead halide perovskite solar cells (PSC) towards the commercialization, the device stability needs to be drastically improved. Our approach relies on the introduction of a compact metal oxide (MeO) layer in a p-i-n planar architecture by means of atmospheric pressure spatial atomic layer deposition (s-ALD) technique....conference paper 2018
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Arutinov, G. (author), Giesbers, M. (author), van Waalwijk van Doorn, S. (author), Chiappini, F. (author), Kusters, R. (author), van den Brand, J. (author)This paper reports the use of Laser-induced Forward Transfer (LIFT) technology for printing of multilayer flexible circuitries and the fabrication of micro-bumps for flip-chip bonding of packaged LEDs and bare die microcomponents. Bonding of passive and functional surface mount devices (SMD) on low-temperature polyethylene terephthalate (PET)...conference paper 2018
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Shaji Karapuzha, A. (author), van der Zwaag, S. (author), Groen, W.A. (author)Modern flexible and sensitive sensors based on polymer–ceramic composites employ lead zirconate titanate (PZT) granulates having the morphotropic phase boundary (MPB) composition as the piezo active ingredient, as this composition gives the best properties in fully ceramic piezoelectric sensors. In this study, the possibility of using PZT...article 2016
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Deutz, D.B. (author), Mascarenhas, N.T. (author), van der Zwaag, S. (author), Groen, P. (author)In this study, the influence of Li substitution on the piezoelectric performance of lead-free K0.5Na0.5NbO3 (KNN)-epoxy composites is explored. KNN piezoceramic particles modified with 0-12 mol% of Li are prepared via a double calcination technique, resulting in a perovskite particulate which transitions from an orthorhombic to tetragonal...article 2016
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Deutz, D.B. (author), Tempelman, E. (author), van der Zwaag, S. (author), Groen, W.A. (author)To enable the design of more intuitive product user interfaces, the prospects of matching piezoelectric touch sensors with flexible organic light emitting diode (OLED) technology are investigated. Low stiffness piezoelectric composite sensors, combining piezoelectric Pb(Zr,Ti)O3 powder with a polymer matrix, are prepared and compared to existing...article 2015
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Drupsteen, L. (author), Wybo, J.L. (author)Most organisations aim to use experience from the past to improve safety, for instance through learning from safety-related incidents and accidents. Whether an organisation is able to learn successfully can however only be determined afterwards. So far, there are no proactive measures to assess whether an organisation will be able to learn from...article 2015
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Minguillón, M.C. (author), Cirach, M. (author), Hoek, G. (author), Brunekreef, B. (author), Tsai, M. (author), de Hoogh, K. (author), Jedynska, A. (author), Kooter, I.M. (author), Nieuwenhuijsen, M. (author), Querol, X. (author)Trace and major elements concentrations in PM10 and PM2.5 were measured at 20 sites spread in the Barcelona metropolitan area (1 rural background, 6 urban background, 13 road traffic sites) and at 1 reference site. Three 2-week samples per site and size fraction were collected during 2009 using low volume samplers, adding a total of 120 samples....article 2014
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Zwetsloot, G.I.J.M. (author), Drupsteen, L. (author), de Vroome, E.M.M. (author)The research presented in this paper was carried out in four process industry plants in the Netherlands, to identify factors that have the potential to increase safety and reliability while maintaining or improving job satisfaction. The data used were gathered as part of broader trajectories in these firms, aiming at the simultaneous improvement...article 2014