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de Boer, S. (author), Karpel, M. (author), Sodja, J. (author)A new flutter test version of the Parametric Flutter Margin (PFM) method, specifically applied to wings undergoing large deflections is presented. The PFM method adds a stabilising parameter, such as a stabilising mass, to the model such that the flutter velocity is increased. By exciting the stabilising mass in one of the primary (i.e., x, y...conference paper 2023
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- Ninan, Dr Johan (author), Hertogh, M.J.C.M. (author), Lim, Y. (author), de Boer, J.J. (author), Pesamaa, Ossi (author), Van Acker, Maarten (author), Schwab, Eva (author), Ilsbroekx, Raf (author), Bernsteiner, Johannes (author) conference paper 2023
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Amir, Sana (author), van der Veen, C. (author), Walraven, J.C. (author), de Boer, Ane (author)A large number of bridges in the Netherlands have transversely post tensioned deck slabs cast in-situ between flanges of precast girders and were found to be critical in shear when evaluated by Eurocode 2. To investigate the bearing (punching shear) capacity of such bridges, a 1:2 scale bridge model was constructed in the laboratory and...conference paper 2023
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de Boer, Frans (author), van Gemert, J.C. (author), Dijkstra, Jouke (author), Pintea, S. (author)Activity progress prediction aims to estimate what percentage of an activity has been completed. Currently this is done with machine learning approaches, trained and evaluated on complicated and realistic video datasets. The videos in these datasets vary drastically in length and appearance. And some of the activities have unanticipated...conference paper 2023
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van der Burg, Vera (author), de Boer, Gijs (author), Akdag Salah, Amila (author), Chandrasegaran, R.S.K. (author), Lloyd, P.A. (author)Artificial intelligence (AI) is increasingly being viewed as a creative partner rather than as a tool. How to design such collaborations is still a subject of speculation. In this pictorial, we propose a collaborative role for AI to prompt self-reflection. We explore this through a practice-based inquiry of whether and how AI could help a...conference paper 2023
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de Boer, L.E. (author), Mouter, N. (author), de Vries, M.O. (author)Brede welvaart betekent breder naar vooruitgang kijken dan in termen van economische groei of – in het mobiliteitsdomein – capaciteitsknelpunten alleen. De behoefte aan een brede welvaart benadering resoneert in toenemende mate bij professionals, beleidsmakers en politici. Het oude verhaal is als een jas die om meerdere redenen steeds minder...conference paper 2022
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de Boer, Thies (author), Schöpe, M.I. (author), Driessen, J.N. (author)The radar resource management problem in a multi-target tracking scenario is considered. Partially observable Markov decision processes (POMDPs) are used to describe each tracking task. Model predictive control is applied to solve the POMDPs in a non-myopic way. As a result, the computational complexity compared to stochastic optimization...conference paper 2021
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de Boer, A. (author), Hendriks, M.A.N. (author), van der Veen, C. (author), Belletti, Beatrice (author)At the previous EURO-C conference, a guideline for nonlinear finite analysis and safety assessment of concrete structures was presented. This guideline is a results of a cooperation between the Delft University of Technology, the University of Parma and the Dutch Ministry of Infrastructure and the Environment. The nonlinear finite element...conference paper 2018
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Ensink, S.W.H. (author), van der Veen, C. (author), Hordijk, D.A. (author), Lantsoght, E.O.L. (author), van der Ham, Herbert (author), de Boer, A. (author)In the Netherlands, approximately 150 prestressed T-beam bridges with cast-in-between decks and mainly built in the sixties are still in service. Upon assessment, the prestressed beams often do not fulfil the design codes requirements, whereas upon inspection, they show no signs of distress. For the assessment, additional load transfer...conference paper 2018
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de Boer, W.P. (author), Slinger, J (author), kangeri, arno (author), Taneja, P. (author), Vreugdenhil, H.S.I. (author), Vellinga, T. (author)Connecting to the trend of harmonization of port developments with nature, this paper presents a framework for the explicit inclusion of ecosystem based alternatives in the early planning and design stages of seaport developments. The framework aims to shift the focus from offsetting environmental impacts afterwards to avoidance and reduction of...conference paper 2018
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Ghafaryasl, B. (author), Vermeer, K.A. (author), Kalkman, J. (author), Dore-Callewaert, T.W.J. (author), de Boer, J.F. (author), van Vliet, L.J. (author)The attenuation coefficient (AC) is a property related to the microstructure of tissue on a wavelength scale that can be estimated from optical coherence tomography (OCT) data. Since the OCT signal sensitivity is affected by the finite spectrometer/detector resolution called roll-off and the shape of the focused beam in the sample arm,...conference paper 2018
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- Hagenaars, G.S. (author), Luijendijk, Arjen (author), de Vries, S. (author), de Boer, W.P. (author) conference paper 2017
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- de Boer, W.P. (author), Huisman, B.J.A. (author), Yoo, Jeseon (author), McCall, Robert (author), Scheel, F. (author), Swinkels, Cilia M. (author), Friedman, Josh (author), Luijendijk, Arjen (author), Walstra, D.J.R. (author) conference paper 2017
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A. (author)Proof loading of existing bridges is an option to study the capacity when crucial information about the structure is lacking. To define the loading criteria for proof load testing, a review of the literature has been made, finite element models of existing viaducts have been made, and on these viaducts, proof loading tests have been carried out....conference paper 2017
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A. (author)Most methods for the design and analysis of reinforced concrete slabs for punching are based on experiments on slab-column connections, reflecting the situation in building slabs. Slab-column connections with unbalanced<br/>moments have also been studied in the past. Experiments indicate that the accuracy of models for asymmetrically loaded...conference paper 2017
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Lantsoght, E.O.L. (author), Koekkoek, R.T. (author), Yang, Y. (author), van der Veen, C. (author), de Boer, A. (author), Hordijk, D.A. (author)Proof load testing can be a suitable method to show that a bridge can carry the required loads from the code without distress. This paper addresses the preparation, execution, and analysis of a proof load test on a four-span reinforced concrete solid slab bridge, viaduct de Beek. The bridge has one lane in each direction, but was restricted to a...conference paper 2017
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Ghafaryasl, B. (author), Baart, Robert (author), de Boer, J.F. (author), Vermeer, K.A. (author), van Vliet, L.J. (author)Optical coherence tomography (OCT) yields high-resolution, three-dimensional images of the retina. A better understanding of retinal nerve fiber bundle (RNFB) trajectories in combination with visual field data may be used for future diagnosis and monitoring of glaucoma. However, manual tracing of these bundles is a tedious task. In this work,...conference paper 2017
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Verhagen, W.J.C. (author), Curran, R. (author), de Boer, L.W.M. (author)Costs associated with unscheduled and preventive maintenance can contribute significantly to an airline's expenditure. Reliability analysis can help to identify and plan for maintenance events. Reliability analysis in industry is often limited to statistically based approaches that incorporate failure times as...conference paper 2017
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Lantsoght, E.O.L. (author), Yang, Y. (author), Tersteeg, R.H.D. (author), van der Veen, C. (author), de Boer, A (author)Proof loading of bridges is an option to study existing bridges when crucial information is lacking. When proof loading is chosen, the question arises which maximum load should be attained during the test to demonstrate sufficient capacity, and which criteria, the “stop criteria”, based on the measurements during the test, would indicate that...conference paper 2016
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Yang, Y. (author), van der Veen, C. (author), Hordijk, D.A. (author), de Boer, A. (author)Assessment of the capacity of the existing infrastructures has become more relevant in the recent years. With regard to the concrete bridges, the shear capacity of a large amount of existing concrete slab bridges reinforced with plain (smooth) bars are of concern. However, it was argued that the shear formula that is currently adapted in the...conference paper 2016
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