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Eroms, J. (author), Van Schaarenburg, L.C. (author), Driessen, E.F.C. (author), Plantenberg, J.H. (author), Huizinga, C.M. (author), Schouten, R.N. (author), Verbruggen, A.H. (author), Harmans, C.J.P.M. (author), Mooij, J.E. (author)The authors have studied low-frequency resistance fluctuations in shadow-evaporated Al/AlOx/Al tunnel junctions. Between 300 and 5?K the spectral density follows a 1/f law. Below 5?K, individual defects distort the 1/f shape of the spectrum. The spectral density decreases linearly with temperature between 150 and 1?K and saturates below 0.8?K....journal article 2006
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Mugge, W. (author), Abbink, D.A. (author), Schouten, A.C. (author), Dewald, J.P.A. (author), Van der Helm, F.C.T. (author)This study aims to quantify the separate contributions of muscle force feedback, muscle spindle activity and co-contraction to the performance of voluntary tasks (‘‘reduce the influence of perturbations on maintained force or position’’). Most human motion control studies either isolate only one contributor, or assume that relevant reflexive...journal article 2009
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Van Dijk, T. (author), Schouten, H.F. (author), Visser, T.D. (author)We analyze the coherence singularities that occur in the far field that is generated by a broad class of partially coherent sources. It is shown that for rotationally symmetric planar quasihomogeneous sources the coherence singularities form a two-dimensional surface in a reduced three-dimensional space. We illustrate our results by studying the...journal article 2009
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- Schouten, H.F. (author), Visser, T.D. (author), Lenstra, D. (author), Blok, H. (author) journal article 2003
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Meskers, C.G.M. (author), Schouten, A.C. (author), De Groot, J.H. (author), De Vlugt, E. (author), Van Hilten, B.J.J. (author), Van der Helm, F.C.T. (author), Arendzen, H.J.H. (author)Background Instead of hyper-reflexia as sole paradigm, post-stroke movement disorders are currently considered the result of a complex interplay between neuronal and muscular properties, modified by level of activity. We used a closed loop system identification technique to quantify individual contributors to wrist joint stiffness during an...journal article 2009
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Schuurmans, J. (author), Van der Helm, F.C.T. (author), Schouten, A.C. (author)During posture control, reflexive feedback allows humans to efficiently compensate for unpredictable mechanical disturbances. Although reflexes are involuntary, humans can adapt their reflexive settings to the characteristics of the disturbances. Reflex modulation is commonly studied by determining reflex gains: a set of parameters that quantify...journal article 2010
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Raghunathan, S.B. (author), Schouten, H.F. (author), Visser, T.D. (author)It was recently shown that so-called coherence vortices, singularities of the two-point correlation function, generally occur in partially coherent electromagnetic beams. We study the three-dimensional structure of these singularities and show that in successive cross sections of a beam a rich variety of topological reactions takes place. These...journal article 2013
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- Kaart, S. (author), Schouten, J.C. (author), van den Bleek, C.M. (author) journal article 1999
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Pasma, J.H. (author), Engelhart, D. (author), Maier, A.B. (author), Aarts, R.G.K.M. (author), Van Gerven, J.M.A. (author), Arendzen, J.H. (author), Schouten, A.C. (author), Meskers, C.G.M. (author), Van der Kooij, H. (author)Objectives System identification techniques have the potential to assess the contribution of the underlying systems involved in standing balance by applying well-known disturbances. We investigated the reliability of standing balance parameters obtained with multivariate closed loop system identification techniques. Methods In twelve healthy...journal article 2016
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De Lange, G. (author), Riste, D. (author), Tiggelman, M.J. (author), Eichler, C. (author), Tornberg, L. (author), Johansson, G. (author), Wallraff, A. (author), Schouten, R.N. (author), DiCarlo, L. (author)We demonstrate the active suppression of transmon qubit dephasing induced by dispersive measurement, using parametric amplification and analog feedback. By real-time processing of the homodyne record, the feedback controller reverts the stochastic quantum phase kick imparted by the measurement on the qubit. The feedback operation matches a model...journal article 2014
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- Lupascu, A. (author), Verwijs, C.J.M. (author), Schouten, R.N. (author), Harmans, C.J.P.M. (author), Mooij, J.E. (author) journal article 2004
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- Schouten, H.F. (author), Kuzmin, N. (author), Dubois, G. (author), Visser, T.D. (author), Gbur, G. (author), Alkemade, P.F.A. (author), Blok, H. (author), 't Hooft, G.W. (author), Lenstra, D. (author), Eliel, E.R. (author) journal article 2005
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De Groot, P.C. (author), Van Loo, A.F. (author), Lisenfeld, J. (author), Schouten, R.N. (author), Lupa?cu, A. (author), Harmans, C.J.P.M. (author), Mooij, J.E. (author)We present experimental results on the crosstalk between two ac-operated dispersive bifurcation detectors, implemented in a circuit for high-fidelity readout of two strongly coupled flux qubits. Both phase-dependent and phase-independent contributions to the crosstalk are analyzed. For proper tuning of the phase the measured crosstalk is 0.1%...journal article 2010
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Munts, A.G. (author), Mugge, W. (author), Meurs, T.S. (author), Schouten, A.C. (author), Marinus, J. (author), Lorimer Moseley, G. (author), Van der Helm, F.C.T. (author), Van Hilten, J.J. (author)Background: Complex regional pain syndrome (CRPS) may occur after trauma, usually to one limb, and is characterized by pain and disturbed blood flow, temperature regulation and motor control. Approximately 25% of cases develop fixed dystonia. Involvement of dysfunctional GABAergic interneurons has been suggested, however the mechanisms that...journal article 2011
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Schouten, A.C. (author), De Vlugt, E. (author), Van Hilten, J.J. (author), Van der Helm, F.C. (author)This study aimed to analyse the dynamic properties of the muscle spindle feedback system of shoulder muscles during a posture task. External continuous force disturbances were applied at the hand while subjects had to minimize their hand displacements. The results were analysed using two frequency response functions (FRFs) from which the model...journal article 2008
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Forn-Díaz, P. (author), Schouten, R.N. (author), Den Braver, W.A. (author), Mooij, J.E. (author), Harmans, C.J.P.M. (author)We fabricated and tested a squelch circuit consisting of a copper powder filter with an embedded Josephson junction connected to ground. For small signals (squelch ON), the small junction inductance attenuates strongly from dc to at least 1 GHz, while for higher frequencies dissipation in the copper powder increases the attenuation exponentially...journal article 2009
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- Schouten, R. (author) journal article 2013
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- de Korte, R.J. (author), Schouten, J.C. (author), van den Bleek, C.M. (author) journal article 1995
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Herfort, L. (author), Kim, J.H. (author), Coolen, M.J.L. (author), Abbas, B. (author), Schouten, S. (author), Herndl, G.J. (author), Sinninghe Damste, J.S. (author)Pelagic archaeal phylogenetic diversity and the potential for crenarchaeotal nitrification of Group 1.1a were determined in the rivers Rhine and Têt by 16S rRNA sequencing, catalyzed reported deposition-fluorescence in situ hybridization (CARD–FISH) and quantification of 16S rRNA and functional genes. Euryarchaeota were, for the first time,...journal article 2009
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Schouten, A.C. (author), De Vlugt, E. (author), Van der Helm, F.C.T. (author)This study aimed to identify the functional contribution of reflexes to human motor control during posture maintenance. Continuous random force disturbances were applied at the hand while the subjects were instructed to minimize the deviation resulting from the force disturbances. The results were analyzed in the frequency domain with frequency...journal article 2008