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Schepers, J.G. (author), van Dorp, P. (author), Verzijlbergh, R. (author), Baas, P. (author), Jonker, H. (author)
This article describes a study in which the loads are assessed as calculated on a 10 MW wind turbine in response to extreme wind events on the North Sea. The turbine on which the loads are calculated is the 10 MW Reference Wind Turbine as designed in the EU project AVATAR (Sieros, et al., January 2015). The study is carried out within the Dutch...
article 2020
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Jonker, J. (author), Berkers, F.T.H.M. (author), Derks, M.J.W. (author), Montenegro Navarro, N. (author), Wieclawska, S.M. (author), Speijer, F. (author), Ploegman, K. (author), Engels, H. (author)
TNO initiated a study to innovatively combine sustainable and collaborative business models and the field of transition studies. This connection is relevant due to a growing number of societal, ecological, economically complex and interdependent challenges. These challenges call for a workable and practical approach to creating a sustainable...
report 2020
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van der Waa, J. (author), van Diggelen, J. (author), Cavalcante Siebert, L. (author), Neericx, M. (author), Jonker, C. (author)
Artificially intelligent agents will deal with more morally sensitive situations as the field of AI progresses. Research efforts are made to regulate, design and build Artificial Moral Agents (AMAs) capable of making moral decisions. This research is highly multidisciplinary with each their own jargon and vision, and so far it is unclear whether...
conference paper 2020
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Jonker, W.A. (author), Kuiper, S. (author), Nijenhuis, J.R. (author), Dekker, A. (author), Bos, A. (author), van de Ven, E.A. (author), Chun, M. (author), Priem, H. (author), Breukers, M. (author)
An adaptive secondary mirror (ASM) is currently being developed for the UH2.2 telescope, consisting of a slumped 620mm convex aspherical facesheet, manipulated by 210 variable-reluctance actuators and supported on a siliconaluminium alloy support structure. The total power dissipation of the actuators is expected to be under 3 Watts. The ASM...
conference paper 2020
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van Baars, G.E. (author), Florijn, H.C.B. (author), Peters, J. (author), de Vreugd, J. (author), van Kempen, F.C.M. (author), van den Boom, S.J. (author), van de Ven, E.A. (author), Jonker, W.A. (author), Lubbers, L.A. (author)
Metamaterials is a rapidly developing field of research. It offers the prospect of material properties that do not exist in regular materials and which might be useful for overcoming hurdles in current mechatronic system design. Stimulated by the progress in additive manufacturing (AM) that has enabled fabrication of materials with complex...
article 2020
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Chun, M. (author), Baranec, C. (author), Lai, O. (author), Lu, J.R. (author), Zhang, R. (author), Kuiper, S. (author), Jonker, W.A. (author), Maniscalco, M. (author)
We are developing a new adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope based on a novel and very efficient hybrid variable reluctance actuator developed by TNO. The actuator technology has broad implications on the ASM design and results in an ASM with a thicker facesheet, lower power dissipation, and simple...
conference paper 2020
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Bowens-Rubin, R. (author), Hinz, P. (author), Jonker, W.A. (author), Kuiper, S. (author), Laguna, C. (author), Maniscalco, M. (author)
conference paper 2020
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Hinz, P.M. (author), Bowens-Rubin, R. (author), Baranec, C. (author), Bundy, K. (author), Chun, M. (author), Dillon, D. (author), Holden, B. (author), Jonker, W.A. (author), Kosiarek, M. (author), Kupke, R. (author), Kuiper, S. (author), Lai, O. (author), Lu, J.R. (author), Maniscalco, M. (author), Radovan, M. (author), Ragland, S. (author), Sallum, S. (author), Skemer, A. (author), Wizinowich, P. (author)
An Adaptive secondary mirror (ASM) allows for the integration of adaptive optics (AO) into the telescope itself. Adaptive secondary mirrors, based on hybrid variable reluctance (HVR) actuator technology, developed by TNO, provide a promising path to telescope-integrated AO. HVR actuators have the advantage of allowing mirrors that are sti↵er,...
conference paper 2020
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Jonker, J.G.G. (author), Junginger, M. (author), Posada, J. (author), Ioiart, C.S. (author), Faaij, A.P.C. (author), van der Hilst, F. (author)
Biomass feedstock can be used for the production of biofuels or biobased chemicals to reduce anthropogenic greenhouse gas (GHG) emissions. Earlier studies about the techno-economic performance of biofuel or biobased chemical production varied in biomass feedstock, conversion process, and other techno-economic assumptions. This made a fair...
article 2019
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van Riel, M.C.J.M. (author), Jonker, W.A. (author), Maniscalco, M.P. (author)
public lecture 2019
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Read, A. (author), Gittins, C. (author), Uilenreef, J. (author), Jonker, T. (author), Neele, F. (author), Belfroid, S. (author), Goetheer, E. (author), Wildenborg, T. (author)
The ROAD project was designed to demonstrate the technical and economic feasibility of a large-scale, integrated CCS-chain deployed on power generation. Post-combustion technology was to be applied to separate CO2 from the flue gases of the new 1069 MWe coal-fired Maasvlakte Power Plant 3 (MPP3) in the harbour area of Rotterdam. From the capture...
article 2019
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Kuiper, S. (author), Jonker, W.A. (author), Maniscalco, M.P. (author), Priem, H. (author), Coolen, C. (author), Chun, M. (author), Baranec, C. (author), Lu, J. (author), Lai, O. (author)
TNO and industrial partners VDL ETG, L3Harris and Hyperion are developing a novel Adaptive Secondary Mirror (ASM) for Ground Layer Adaptive Optics (GLAO) at the University of Hawaii’s 88-inch telescope on Mauna Kea. The ASM is based on a unique actuator principle which delivers a >30µm PV 99% linear stroke at a very high efficiency in terms of...
conference paper 2019
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van de Kamp, T. (author), Peter, A. (author), Everts, M.H. (author), Jonker, W. (author)
We propose the first multi-client predicate-only encryption scheme capable of efficiently testing the equality of two encrypted vectors. Our construction can be used for the privacy-preserving monitoring of relations among multiple clients. Since both the clients’ data and the predicates are encrypted, our system is suitable for situations in...
conference paper 2018
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Smets, N.J.J.M. (author), Neerincx, M.A. (author), Jonker, C.M. (author), Bberg, F. (author)
Situation Awareness (SA) during tele-operation in robot-assisted disaster management has a major impact on the effectiveness and efficiency. Data perceived by the human and robot agents should be processed and shared in such a way that these agents can understand and direct the other agent's behaviors. E.g., for safe and effective tele-operation...
conference paper 2017
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Bortolameotti, R. (author), van Ede, T. (author), Caselli, M. (author), Everts, M.H. (author), Hartel, P. (author), Hofstede, R. (author), Jonker, W. (author), Peter, A. (author)
We present DECANTeR, a system to detect anomalous outbound HTTP communication, which passively extracts fingerprints for each application running on a monitored host. The goal of our system is to detect unknown malware and backdoor communication indicated by unknown fingerprints extracted from a host's network traffic. We evaluate a prototype...
conference paper 2017
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Snel, R. (author), Winters, J. (author), Liebig, T. (author), Jonker, W.A. (author)
Contemporary production systems of mechanical precision parts show challenges as increased complexity, tolerances shrinking to sub-microns and yield losses that must be mastered to the extreme. More advanced automation and process control is required to accomplish this task. Often a solution based on feedforward/feedback control is chosen...
conference paper 2017
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Jonker, E. (author), Iyer, V. (author)
public lecture 2017
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Bortolameotti, R. (author), Peter, A. (author), Everts, M.H. (author), Jonker, W. (author), Hartel, P. (author)
We address the problem of determining what data has been leaked from a system after its recovery from a successful attack. This is a forensic process which is relevant to give a better understanding of the impact of a data breach, but more importantly it is becoming mandatory according to the recent developments of data breach notification laws....
conference paper 2016
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van de Kamp, T.R. (author), Peter, A. (author), Everts, M.H. (author), Jonker, W. (author)
Information sharing helps to better protect computer sys- tems against digital threats and known attacks. However, since security information is usually considered sensitive, parties are hesitant to share all their information through public channels. Instead, they only exchange this informa- tion with parties with whom they already established...
conference paper 2016
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Willers, S.M. (author), Jonker, M.F. (author), Klok, L. (author), Keuken, M.P. (author), Odink, J. (author), van den Elshout, S. (author), Sabel, C.E. (author), Mackenbach, J.P. (author), Burdorf, A. (author)
Background: Elevated temperature and air pollution have been associated with increased mortality. Exposure to heat and air pollution, as well as the density of vulnerable groups varies within cities. The objective was to investigate the extent of neighbourhood differences in mortality risk due to heat and air pollution in a city with a temperate...
article 2016
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