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Chamari, L. (author), van der Weijden, J.A.M. (author), Boonstra, L. (author), Hoekstra, W.S. (author), Petrova, E. (author), Pauwels, P. (author)The integration of data from a variety of systems is critical for developing smart building applications. Design, construction, maintenance, energy management, and automation data are among few. For this integration, having a comprehensive metadata schema is crucial. Semantic web technologies and domain ontologies have been proposed as a means...conference paper 2023
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Dijkstra, Aranka M. (author), Tiekstra, Siebrith M. (author), Boonstra, Marije (author), Joore, Peter (author)The use of Living Labs is a promising approach to develop and test sustainable system innovations. A Living Lab approach that is yet to be discussed in literature, is that of a Festival Living Lab (FLL). Festivals can be considered as temporary mini societies with systemic sustainability challenges regarding water, energy, housing, logistics,...conference paper 2023
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Scharff, R.B.N. (author), Boonstra, D. (author), Willemet, L. (author), Lin, X. (author), Wiertlewski, M. (author)Tactile sensing can provide access to information about the contact (i.e. slippage, surface feature, friction), which is out of reach of vision but crucial for manipulation. To access this information, a dense measurement of the deformation of soft fingertips is necessary. Recently, tactile sensors that rely on a camera looking at a deformable...conference paper 2022
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Legerstee, W.J. (author), Boekel, M.G.M. (author), Boonstra, S. (author), Kelder, E.M. (author)An Atomic Force Microscope (AFM) is combined with a special designed glovebox system and coupled to a Galvanostat/Potentiostat to allow measurements on electrochemical properties for battery research. An open cell design with electrical contacts makes it possible to reach the electrode surface with the cantilever so as to perform measurements...journal article 2021
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Roebroek, Caspar T.J. (author), Hut, R.W. (author), Vriend, Paul (author), De Winter, Winnie (author), Boonstra, Marijke (author), Van Emmerik, Tim H.M. (author)Anthropogenic macrolitter (>0.5 cm) in rivers is of increasing concern. It has been found to have an adverse effect on riverine ecosystem health, and the livelihoods of the communities depending on and living next to these ecosystems. Yet, little is known on how macrolitter reaches and propagates through these ecosystems. A better...journal article 2021
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Koopmans, Léon V.E. (author), Barkana, Rennan (author), Bentum, Mark (author), Bernardi, Gianni (author), Boonstra, Albert Jan (author), Bowman, Judd (author), Burns, Jack (author), Chen, Xuelei (author), Gurvits, L. (author)The Dark Ages and Cosmic Dawn are largely unexplored windows on the infant Universe (z ~ 200–10). Observations of the redshifted 21-cm line of neutral hydrogen can provide valuable new insight into fundamental physics and astrophysics during these eras that no other probe can provide, and drives the design of many future ground-based...journal article 2021
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Bentum, M. J. (author), Verma, M. K. (author), Rajan, R.T. (author), Boonstra, A. J. (author), Verhoeven, C.J.M. (author), Gill, E.K.A. (author), van der Veen, A.J. (author), Falcke, H. (author), Gurvits, L. (author)The past two decades have witnessed a renewed interest in low frequency radio astronomy, with a particular focus on frequencies above 30 MHz e.g., LOFAR (LOw Frequency ARray) in the Netherlands and its European extension ILT, the International LOFAR Telescope. However, at frequencies below 30 MHz, Earth-based observations are limited due to a...journal article 2020
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Pasma, J.H. (author), Boonstra, T.A. (author), van Kordelaar, J. (author), Spyropoulou, V. (author), Schouten, A.C. (author)Balance control models are used to describe balance behavior in health and disease. We identified the unique contribution and relative importance of each parameter of a commonly used balance control model, the Independent Channel (IC) model, to identify which parameters are crucial to describe balance behavior. The balance behavior was expressed...journal article 2017
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Rajan, R.T. (author), Boonstra, A.J. (author), Bentum, M. (author), Klein-Wolt, M. (author), Belien, F. (author), Arts, M. (author), Saks, N. (author), Van der Veen, A.J. (author)The past decade has seen the advent of various radio astronomy arrays, particularly for low-frequency observations below 100 MHz. These developments have been primarily driven by interesting and fundamental scientific questions, such as studying the dark ages and epoch of re-ionization, by detecting the highly red-shifted 21 cm line emission....journal article 2015
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Boonstra, M.C. (author), Van Driel, P.B.A.A. (author), Van Willigen, D.M. (author), Stammes, M.A. (author), Prevoo, H.A.J.M. (author), Tummers, Q.R.J.G. (author), Mazar, A.P. (author), Beekman, F.J. (author), Kuppen, P.J.K. (author), Van de Velde, C.J.H. (author), Löwik, C.W.G.M. (author), Frangioni, J.V. (author), Van Leeuwen, F.W.B. (author), Sier, C.F.M. (author), Vahrmeijer, A.L. (author)Pre- and intraoperative diagnostic techniques facilitating tumor staging are of paramount importance in colorectal cancer surgery. The urokinase receptor (uPAR) plays an important role in the development of cancer, tumor invasion, angiogenesis, and metastasis and over-expression is found in the majority of carcinomas. This study aims to develop...journal article 2015
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Boonstra, T.A. (author), Van Vugt, J.P.P. (author), Van der Kooij, H. (author), Bloem, B.R. (author)Balance control (the ability to maintain an upright posture) is asymmetrically controlled in a proportion of patients with Parkinson’s disease. Gait asymmetries have been linked to the pathophysiology of freezing of gait. We speculate that asymmetries in balance could contribute to freezing by a) hampering the unloading of the stepping leg and...journal article 2014
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Boonstra, T.A. (author), Schouten, A.C. (author), Van der Kooij, H. (author)Background Human stance involves multiple segments, including the legs and trunk, and requires coordinated actions of both. A novel method was developed that reliably estimates the contribution of the left and right leg (i.e., the ankle and hip joints) to the balance control of individual subjects. Methods The method was evaluated using...journal article 2013
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- Boonstra, C. (author) conference paper 2009
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Bentum, M.J. (author), Verhoeven, C.J.M. (author), Boonstra, A.J. (author), Van der Veen, A.J. (author), Gill, E.K.A. (author)OLFAR, Orbiting Low Frequency Antennas for Radio Astronomy, will be a space mission to observe the universe frequencies below 30 MHz, as it was never done before with an orbiting telescope. Because of the ionospheric scintillations below 30 MHz and the opaqueness of the ionosphere below 15 MHz, a space mission is the only opportunity for this as...conference paper 2009
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- Boonstra, C. (author) conference paper 2008
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- Boonstra, H. (author) conference paper 2007
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- Koning Gans, Henk J. (author), Boonstra, Hotze (author) conference paper 2007
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Boonstra, A.J. (author), Van der Tol, S. (author)The Low Frequency Array (LOFAR) is a radio telescope currently being designed. Its targeted observational frequency window lies in the range of 10–250 MHz. In frequency bands in which there is interference, the sensitivity of LOFAR can be enhanced by interference mitigation techniques. In this paper we demonstrate spatial filtering capabilities...journal article 2005
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Boonstra, A.J. (author)The next generation of radio telescopes is expected to be one to two orders of magnitude more sensitive than the current generation. Examples of such new telescopes are the Low Frequency Array (LOFAR), currently under construction in the Netherlands, and the Square Kilometer Array (SKA), currently in a concept study phase. Another trend is that...doctoral thesis 2005
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- Keuning, J.A. (author), Boonstra, H. (author), Noordenbos, P.H. (author) conference paper 2004