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Felz, S. (author), Vermeulen, Pascalle (author), van Loosdrecht, M.C.M. (author), Lin, Yue Mei (author)
Biofilm structure and functionality depend on extracellular polymeric substances (EPS), but analytical methods for EPS often lack specificity which limits progress of biofilm research. EPS were extracted from aerobic granular sludge and analyzed with frequently applied colorimetric methods. The colorimetric methods were evaluated based on...
journal article 2019
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Bhaskar, P. (author), Achtstein, A.W. (author), Vermeulen, M.J.W. (author), Siebbeles, L.D.A. (author)
Trigonal tellurium is a small band gap elemental semiconductor consisting of van der Waals bound one-dimensional helical chains of tellurium atoms. We study the temperature dependence of the charge carrier mobility and recombination pathways in bulk tellurium. Electrons and holes are generated by irradiation of the sample with 3 MeV electrons...
journal article 2019
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Bhaskar, P. (author), Achtstein, Alexander W. (author), Vermeulen, M.J.W. (author), Siebbeles, L.D.A. (author)
Tin disulfide (SnS2) is a two-dimensional semiconducting van der Waals material with an indirect band gap. We measured the mobility and recombination dynamics of charge carriers as a function of temperature and charge density. Excess electrons and holes were generated by pulsed irradiation with 3 MeV electrons. The charge carriers were probed by...
journal article 2019
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Vermeulen, Bart (author), Boersema, Matthijs (author), Hoitink, Ton (author), Sieben, Arjan (author), Sloff, C.J. (author), Van Der Wal, Maarten (author)
Longitudinal training dams (LTDs) are a promising alternative for river groynes. Here we summarize findings of a recent study focused on the along river transition from a series of river groynes to an LTD, where the flow divides between the fairway and the side channel between the LTD and the river bank. A scale model is setup using...
journal article 2018
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Humphreys, P.C. (author), Kalb, N. (author), Morits, J.P.J. (author), Schouten, R.N. (author), Vermeulen, R.F.L. (author), Twitchen, Daniel J. (author), Markham, Matthew (author), Hanson, R. (author)
Large-scale quantum networks promise to enable secure communication, distributed quantum computing, enhanced sensing and fundamental tests of quantum mechanics through the distribution of entanglement across nodes <sup>1-7</sup>. Moving beyond current two-node networks <sup>8-13</sup> requires the rate of entanglement generation between nodes...
journal article 2018
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Fu, X. (author), Rol, M.A. (author), Bultink, C.C. (author), van Someren, J. (author), Khammassi, N. (author), Ashraf, I. (author), Vermeulen, R.F.L. (author), de Sterke, J.C. (author), Vlothuizen, W.J. (author), Schouten, R.N. (author), García Almudever, C. (author), di Carlo, L. (author), Bertels, K.L.M. (author)
This article proposes a quantum microarchitecture, QuMA. Flexible programmability of a quantum processor is achieved by multilevel instructions decoding, abstracting analog control into digital control, and translating instruction execution with non-deterministic timing into event trigger with precise timing. QuMA is validated by several...
journal article 2018
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Anil Kumar, J.W. (author), Vermeulen, P. (author), Kooi, Bart J. (author), Rao, Jiancun (author), van Eijck, L. (author), Schwarzmüller, Stefan (author), Oeckler, Oliver (author), Blake, Graeme R. (author)
The alloys (GeTe)<sub>x</sub>(AgSbTe<sub>2</sub>)<sub>100-x</sub>, commonly known as TAGS-x, are among the best performing p-type thermoelectric materials for the composition range 80 ≤ x ≤ 90 and in the temperature range 200-500 °C. They adopt a rhombohedrally distorted rocksalt structure at room temperature and are reported to undergo a...
journal article 2017
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Hoitink, A.J.F. (author), Wang, Z.B. (author), Vermeulen, B. (author), Huismans, Y (author), Kästner, K (author)
River delta degradation has been caused by extraction of natural resources, sediment retention by reservoirs, and sea-level rise. Despite global concerns about these issues, human activity in the world’s largest deltas intensifies. Harbour development, construction of flood defences, sand mining and land reclamation emerge as key contemporary...
journal article 2017
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Rol, M.A. (author), Bultink, C.C. (author), O'Brien, T.E. (author), De Jong, S. R. (author), Theis, L. S. (author), Fu, X. (author), Lüthi, F. (author), Vermeulen, R.F.L. (author), de Sterke, J.C. (author), Bruno, A. (author), Deurloo, D. (author), Schouten, R.N. (author), Wilhelm, FK (author), di Carlo, L. (author)
We present a tuneup protocol for qubit gates with tenfold speedup over traditional methods reliant on qubit initialization by energy relaxation. This speedup is achieved by constructing a cost function for Nelder-Mead optimization from real-time correlation of nondemolition measurements interleaving gate operations without pause. Applying the...
journal article 2017
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Vermeulen, B. (author), Pyka, A. (author), la Poutré, J.A. (author), de Kok, A.G. (author)
In recent literature, there is disagreement over the temporal pattern of vertical governance of firms over the product life-cycle. We use a novel neo-Schumpeterian agent-based simulation model to investigate emerging patterns of vertical governance for different levels of imitability and substitutability of capabilities. We find that, in the...
journal article 2016
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Bultink, C.C. (author), Rol, M.A. (author), O'Brien, T.E. (author), Fu, X. (author), Dikken, B.C.S. (author), Dickel, C. (author), Vermeulen, R.F.L. (author), de Sterke, J.C. (author), Bruno, A. (author), Schouten, R.N. (author), di Carlo, L. (author)
We present two pulse schemes to actively deplete measurement photons from a readout resonator in the nonlinear dispersive regime of circuit QED. One method uses digital feedback conditioned on the measurement outcome, while the other is unconditional. In the absence of analytic forms and symmetries to exploit in this nonlinear regime, the...
journal article 2016
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Hensen, B.J. (author), Kalb, N. (author), Blok, M.S. (author), Dréau, A.E. (author), Reiserer, A.A. (author), Vermeulen, R.F.L. (author), Schouten, R.N. (author), Markham, M. (author), Twitchen, D.J. (author), Goodenough, K.D. (author), Elkouss Coronas, D. (author), Wehner, S.D.C. (author), Taminiau, T.H. (author), Hanson, R. (author)
The recently reported violation of a Bell inequality using entangled electronic spins in diamonds (Hensen et al., Nature 526, 682–686) provided the first loophole-free evidence against local-realist theories of nature. Here we report on data from a second Bell experiment using the same experimental<br/>setup with minor modifications. We find a...
journal article 2016
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Vermeulen, L.C. (author), Kraker, J. (author), Hofstra, N. (author), Kroeze, C. (author), Medema, G. (author)
Cryptosporidium is a protozoan parasite that can cause diarrhoea. Human faeces are an important source of Cryptosporidium in surface waters. We present a model to study the impact of sanitation, urbanization and population growth on human emissions of Cryptosporidium to surface waters. We build on a global model by Hofstra et al (2013 Sci. Total...
journal article 2015
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Kiulia, Nicholas M. (author), Hofstra, Nynke (author), Vermeulen, Lucie C. (author), Obara, Maureen A. (author), Medema, G.J. (author), Rose, Joan B. (author)
Group A rotaviruses (RV) are the major cause of acute gastroenteritis in infants and young children globally. Waterborne transmission of RV and the presence of RV in water sources are of major public health importance. In this paper, we present the Global Waterborne Pathogen model for RV (GloWPa-Rota model) to estimate the global distribution...
journal article 2015
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Rook, D. (author), Schierbeek, H. (author), Van der Eijk, A.C. (author), Longini, M. (author), Buonocore, G. (author), Vento, M. (author), Van Goudoever, J.B. (author), Vermeulen, M.J. (author)
Background Resuscitation at birth with 100% oxygen is known to increase the oxidative burden with concomitant deleterious effects. Although fractions of inspired oxygen (FiO2)?<?100% are widely used in preterm infants, starting resuscitation at a (too) low FiO2 may result in hypoxia. The objective of this study is to compare the safety and...
journal article 2012
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Vermeulen, M. (author), Wisse, M. (author)
We present a design for a manipulator that is intrinsically mechanically safe, i.e. it can not cause pain (let alone damage) to a human being even if the control system has a failure. Based on the pressure pain thresholds for human skin, we derive a pinching safety constraint that limits the actuator torque, and an impact safety constraint that...
journal article 2010
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Kroon, P.S. (author), Hensen, A. (author), Jonker, H.J.J. (author), Zahniser, M.S. (author), Van 't Veen, W.H. (author), Vermeulen, A.T. (author)
A quantum cascade laser spectrometer was evaluated for eddy covariance flux measurements of CH4 and N2O using three months of continuous measurements at a field site. The required criteria for eddy covariance flux measurements including continuity, sampling frequency, precision and stationarity were examined. The system operated continuously at...
journal article 2007
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Vermeulen, P.T.M. (author), Te Stroet, C.B.M. (author), Heemink, A.W. (author)
Different upscaling methods for groundwater flow models are investigated. A suite of different upscaling methods is applied to several synthetic cases with structured and unstructured porous media. Although each of the methods applies best to one of the synthetic cases, no performance differences are formed if the methods were applied to a real...
journal article 2006
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Vermeulen, P.T.M. (author), Te Stroet, C.B.M. (author), Heemink, A.W. (author)
Despite increasing computational resources many high?dimensional applications are impractical for model inversions. In this paper, two methods are presented that are promising for high?dimensional model inversion. The methods draw on proper orthogonal decomposition (POD) and yield reduced models that describe a truncated behavior of the original...
journal article 2006
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Vermeulen, P.T.M. (author), Heemink, A.W. (author), Valstar, J.R. (author)
Numerical groundwater flow models often have a very high number of model cells (greater than a million). Such models are computationally very demanding, which is disadvantageous for inverse modeling. This paper describes a low?dimensional formulation for groundwater flow that reduces the computational burden necessary for inverse modeling. The...
journal article 2005
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