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den Heijer, F. (author), Kok, M. (author)A system of dikes in flood-prone areas continuously requires measures to mitigate changes such as ageing and climate change. Planning costly measures requires proper insight into system risk effects. Especially in a riverine dike system, the risk contributions of individual assets to the system flood risks are not independent, because...journal article 2023
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van der Voorn, Tom (author), van den Berg, Caroline (author), Quist, J.N. (author), Kok, Kasper (author)The current COVID-19 pandemic has affected societies across the world while its economic impact has cut deeper than any recession since the Second World War. Climate change is potentially an even more disruptive and complex global challenge. Climate change could cause social and economic damage far larger than that caused by COVID-19. The...journal article 2022
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Kouba, Vojtěch (author), Hůrková, Kamila (author), Navrátilová, Klára (author), Kok, Dana (author), Benáková, Andrea (author), Laureni, M. (author), Vodičková, Patricie (author), van Loosdrecht, Mark C.M. (author), Weissbrodt, D.G. (author)The application of partial nitritation-anammox (PN/A) under mainstream conditions can enable substantial cost savings at wastewater treatment plants (WWTPs), but how process conditions and cell physiology affect anammox performance at psychrophilic temperatures below 15 °C remains poorly understood. We tested 14 anammox communities, including...journal article 2022
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Wahlstrom, Johan (author), Kok, M. (author)The last years have seen a growing body of literature on data-driven pedestrian inertial navigation. However, despite this, it is still unclear how to efficiently combine classical models and other a priori information with existing machine learning frameworks. In this paper, we first categorize existing approaches to data-driven pedestrian...journal article 2022
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Celada-Casero, Carola (author), Vercruysse, Florian (author), Linke, Bernd (author), Smith, Ali (author), Kok, Piet (author), Sietsma, J. (author), Santofimia, Maria Jesus (author)Quenching & Partitioning (Q&P) steels owe their good strength-ductility combinations to the martensite/austenite (α’/γ) mechanical interactions and to the formation of mechanically-induced martensite (α′<sub>mech</sub>) through the transformation-induced plasticity (TRIP) effect. An essential role is played by carbon, whose...journal article 2022
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Kok, M. (author), Eckhoff, Karsten (author), Weygers, Ive (author), Seel, Thomas (author)Real-time motion tracking of kinematic chains is a key prerequisite in the control of, e.g., robotic actuators and autonomous vehicles and also has numerous biomechanical applications. In recent years, it has been shown that, by placing inertial sensors on segments that are connected by rotational joints, the motion of that kinematic chain...journal article 2022
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Rongen, G.W.F. (author), Morales Napoles, O. (author), Kok, M. (author)The Wettelijk Beoordelingsinstrumentarium (WBI) is the legal set of instruments for flood risk analysis in the Netherlands. Often, engineers have the impression that some failure probabilities of flood defenses resulting from these instruments are overestimated. In an effort to better estimate the failure probabilities of dikes along the...journal article 2022
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Rikkert, S.J.H. (author), Kok, M. (author), Lendering, K.T. (author), Jongejan, R.B. (author)Flood prone areas are often protected against flooding by an extensive network of flood defenses. To ensure their structural integrity, these flood defenses are periodically assessed. Many levees have been functioning well for decades, and have survived several relatively high hydraulic loads within their lifetime. However, information on...journal article 2022
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Menzen, C.M. (author), Kok, M. (author), Batselier, K. (author)Multiway data often naturally occurs in a tensorial format which can be approximately represented by a low-rank tensor decomposition. This is useful because complexity can be significantly reduced and the treatment of large-scale data sets can be facilitated. In this paper, we find a low-rank representation for a given tensor by solving a...journal article 2022
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Kammouh, O. (author), Kok, M.W.A. (author), Nogal Macho, M. (author), Binnekamp, R. (author), Wolfert, A.R.M. (author)Changes in a construction project schedule can impact the project's planned duration, resulting in penalties. A manual trial-and-error probabilistic approach is usually conducted to find an appropriate set of corrective measures to mitigate delays of the overall project. However, this approach does not capture the actual goal-oriented...journal article 2022
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Viset, F.M. (author), Helmons, R.L.J. (author), Kok, M. (author)We present a computationally efficient algorithm for using variations in the ambient magnetic field to compensate for position drift in integrated odometry measurements (dead-reckoning estimates) through simultaneous localization and mapping (SLAM). When the magnetic field map is represented with a reduced-rank Gaussian process (GP) using...journal article 2022
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den Heijer, F. (author), Kok, M. (author)Dikes are an effective flood risk reduction measure in deltaic areas. Present risk analyses consist often of decoupled calculations of probabilities of dike failure and calculation of consequences of flooding given dike failure. However, the flood defense design determines not only the probability of failure, but influences the consequences...journal article 2022
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Kouba, Vojtěch (author), Hůrková, Kamila (author), Navrátilová, Klára (author), Kok, Dana (author), Benáková, Andrea (author), Laureni, M. (author), van Niftrik, Laura (author), van Loosdrecht, Mark C.M. (author), Weissbrodt, D.G. (author)The adaptation of bacteria involved in anaerobic ammonium oxidation (anammox) to low temperatures will enable more efficient removal of nitrogen from sewage across seasons. At lower temperatures, bacteria typically tune the synthesis of their membrane lipids to promote membrane fluidity. However, such adaptation of anammox bacteria lipids,...journal article 2022
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Klerk, W.J. (author), Kanning, W. (author), Kok, M. (author), Wolfert, A.R.M. (author)Climate change and deterioration require a continuous effort to reinforce flood defences and meet reliability requirements. To efficiently upgrade flood defence systems, insight in costs and benefits of measures at a system level is required throughout the process of planning and design. Due to the size of flood defence systems the number of...journal article 2021
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Wewer, M. (author), Aguilar Lopez, J.P. (author), Kok, M. (author), Bogaard, T.A. (author)Backward erosion piping is an internal erosion process, which compromises the stability of water retaining structures such as dams and levees. In this paper, we propose a numerical solution that combines a 2D Darcy groundwater solution with Exner's 1D sediment transport mass conservation equation. As an estimate of sediment transport, we...journal article 2021
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van der Krogt, M.G. (author), Schweckendiek, T. (author), Kok, M. (author)During construction of a dike, slope stability often reaches critical levels, due to the excess pore water pressures in the foundation. The loading condition during construction has similarities with the design conditions during flood loading. Not only in terms of the pore water pressures as the main driving force, but also in terms of...journal article 2021
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van Dijk, M.P. (author), Kok, M. (author), Berger, Monique A.M. (author), Hoozemans, Marco J.M. (author), Veeger, H.E.J. (author)In sports, inertial measurement units are often used to measure the orientation of human body segments. A Madgwick (MW) filter can be used to obtain accurate inertial measurement unit (IMU) orientation estimates. This filter combines two different orientation estimates by applying a correction of the (1) gyroscope-based estimate in the...journal article 2021
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Weygers, Ive (author), Kok, M. (author), Seel, Thomas (author), Shah, Darshan (author), Taylan, Orçun (author), Scheys, Lennart (author), Hallez, Hans (author), Claeys, Kurt (author)A major shortcoming in kinematic estimation using skin-attached inertial sensors is the alignment of sensor-embedded and segment-embedded coordinate systems. Only a correct alignment results in clinically relevant kinematics. Model-based inertial-sensor-to-bone alignment methods relate inertial sensor measurements with a model of the joint....journal article 2021
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Klerk, W.J. (author), Kanning, W. (author), Kok, M. (author), Bronsveld, J. (author), Wolfert, A.R.M. (author)Prioritisation of flood defence maintenance is typically based on visual inspection. However, literature shows that the Probability of Detection (PoD) of visual inspection can vary significantly. Here we investigate the PoD for visual inspections of flood defence structures, the consistency of damage classification, and the influence of...journal article 2021
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Santos, Luis Felipe de Paula (author), Alderliesten, R.C. (author), Kok, Winand (author), Ribeiro, Bruno (author), de Oliveira, Juliana Bovi (author), Costa, Michelle Leali (author), Botelho, Edson Cocchieri (author)The use of carbon nanotube buckypapers (BP) has boosted their use in polymeric composites. However, their low permeability makes processing difficult and limits their use. This work's essential contribution is to define the best parameters to process the buckypapers through vacuum filtration technique and the use of electrospun poly (ether...journal article 2021