Searched for: subject%3A%22Ripple%22
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Jouyaeian, A. (author), Fan, Q. (author), Brito Zamparette, R.L. (author), Ausserlechner, Udo (author), Motz, Mario (author), Makinwa, K.A.A. (author)
This article presents a hybrid magnetic current sensor for galvanically isolated measurements. It consists of a CMOS chip that senses the magnetic field generated by current flowing through a lead-frame-based current rail. Hall plates and coils are used to sense low-frequency (dc to 10 kHz) and high-frequency (10 kHz to 5 MHz) magnetic fields...
journal article 2023
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Özkayar, G. (author), Wang, Z. (author), Lötters, J.C. (author), Tichem, M. (author), Ghatkesar, M.K. (author)
Reciprocating piezoelectric micropumps enable miniaturization in microfluidics for lab-on-a-chip applications such as organs-on-chips (OoC). However, achieving a steady flow when using these micropumps is a significant challenge because of flow ripples in the displaced liquid, especially at low frequencies or low flow rates (<50 µL/min)....
journal article 2023
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Mastellone, Matteo (author), Bolli, Eleonora (author), Valentini, Veronica (author), Orlando, Stefano (author), Lettino, Antonio (author), Polini, Riccardo (author), Buijnsters, J.G. (author), Bellucci, Alessandro (author), Trucchi, Daniele Maria (author)
Polycrystalline boron-doped diamond (BDD) films were surface nanotextured by femtosecond pulsed laser irradiation (100 fs duration, 800 nm wavelength, 1.44 J cm<sup>−2</sup> single pulse fluence) to analyse the evolution of induced alterations on the surface morphology and structural properties. The aim was to identify the occurrence of laser...
journal article 2023
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Chen, Y. (author), Gong, J. (author), Staszewski, R.B. (author), Babaie, M. (author)
In this article, we present a 4.5-5.1-GHz fractional-N digitally intensive phase-locked loop (DPLL) capable of maintaining its performance in face of a large supply ripple, thus enabling a direct connection to a switched-mode dc-dc converter. Supply pushing of its inductor-capacitor (LC) oscillator is suppressed by properly replicating the...
journal article 2022
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Uphues, Charlotte F.K. (author), van IJzendoorn, Christa (author), Hallin, E.C. (author), Pearson, S.G. (author), van Prooijen, Bram (author), Miot da Silva, Graziela (author), de Vries, S. (author)
Coastal aeolian sediment transport is influenced by supply-limiting factors caused by sediment sorting by grain size. Sorting processes can lead to coarsening of the bed surface and influence the formation of aeolian ripples. However, the influence sorting processes and bedforms might have on the magnitude of the transport is not fully...
journal article 2022
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Wikkerink, D.P. (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)
Ships can avoid to be detected by magnetic mines by reducing their magnetic signature with degaussing coils. Degaussing currents are provided by switched mode power supplies which impose a current ripple on top of the degaussing current. The ripple might be visible in the magnetic signature which would increase the detectability of the ship. A...
journal article 2022
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Yao, Yu (author), Huang, Yunkai (author), Peng, Fei (author), Dong, J. (author)
This article proposes a sliding-mode position estimation method for high-speed surface-mounted permanent magnet synchronous machines with LCL filter. The implementation of the LCL filter aims at smoothing the motor current and reducing the iron loss caused by the harmonic currents. First, the discrete-time model of the LCL-filtered motor...
journal article 2022
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Wengrove, Meagan E. (author), de Schipper, M.A. (author), Lippmann, Thomas C. (author), Foster, Diane L. (author)
Field observations of small scale seabed morphology were obtained over 4 weeks at two locations separated 66 m along a cross-shore transect during the 2014 MEGAPEX Experiment conducted as part of the longer term Sand Engine mega-nourishment project along the North Sea Coast of The Netherlands. The seafloor was continuously covered by dynamic...
journal article 2022
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Ganeshpure, D.A. (author), Soeiro, Thiago B. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author), Bauer, P. (author)
This paper comprehensivelyinvestigates the design trade-offs of a Modular Multilevel Converter (MMC) operations as an Arbitrary Wave shapesGenerator (AWG) to perform High Voltage (HV) dielectric testing of different grid assets. HV AWG applications pose unique operatingconditions to the MMC, which influences the selection of the various...
journal article 2021
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Prades, Lledó (author), Fabbri, Stefania (author), Dorado, Antonio D. (author), Gamisans, Xavier (author), Stoodley, Paul (author), Picioreanu, C. (author)
Experimental data showed that high-speed microsprays can effectively disrupt biofilms on their support substratum, producing a variety of dynamic reactions such as elongation, displacement, ripple formation, and fluidization. However, the mechanics underlying the impact of high-speed turbulent flows on biofilm structure is complex under such...
journal article 2020
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Chen, Y. (author), Liu, Yao-Hong (author), Zong, Z. (author), Dijkhuis, Johan (author), Dolmans, Guido (author), Staszewski, R.B. (author), Babaie, M. (author)
In this paper, we propose a method to suppress supply pushing of an LC oscillator such that it may directly operate from a switched-mode dc-dc converter generating fairly large ripples. A ripple replication block (RRB) generates an amplified ripple replica at the gate terminal of the tail current source to stabilize the oscillator's tail...
journal article 2019
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Zuo, L. (author), Roelvink, D. (author), Lu, Yongjun (author)
Suspended sediment concentration (SSC) is one of the fundamental topics in sediment study. The parameterization of the SSC profile of silty sediments is still under-researched. This study focuses on the mean SSC profile for silty sediments under non-breaking wave-dominant conditions. First, inspired by a 1DV model, different types of the...
journal article 2019
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Wengrove, M. E. (author), Foster, D. L. (author), Lippmann, T. C. (author), de Schipper, M.A. (author), Calantoni, J. (author)
Although combined wave-current flows in the nearshore coastal zone are common, there are few observations of bedform response and inherent geometric scaling in combined flows. Our effort presents observations of bedform dynamics that were strongly influenced by waves, currents, and combined wave-current flow at two sampling locations...
journal article 2018
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Frota Sartori, A. (author), Orlando, Stefano (author), Bellucci, Alessandro (author), Trucchi, Daniele M. (author), Abrahami, S.T. (author), Boehme, Thijs (author), Hantschel, Thomas (author), Vandervorst, Wilfried (author), Buijnsters, J.G. (author)
Diamond is known as a promising electrode material in the fields of cell stimulation, energy storage (e.g., supercapacitors), (bio)sensing, catalysis, etc. However, engineering its surface and electrochemical properties often requires costly and complex procedures with addition of foreign material (e.g., carbon nanotube or polymer) scaffolds...
journal article 2018
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Damveld, J. H. (author), van der Reijden, K. J. (author), Cheng, C. (author), Koop, L. (author), Haaksma, L. R. (author), Walsh, C. A.J. (author), Soetaert, K. (author), Borsje, B. W. (author), Govers, L. L. (author)
The sandy seabed of shallow coastal shelf seas displays morphological patterns of various dimensions. The seabed also harbors a rich ecosystem. Increasing pressure from human-induced disturbances necessitates further study on drivers of benthic community distributions over morphological patterns. Moreover, a greater understanding of the sand...
journal article 2018
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Milakis, D. (author), van Arem, B. (author), van Wee, G.P. (author)
In this paper, the potential effects of automated driving that are relevant to policy and society are explored, findings discussed in literature about those effects are reviewed and areas for future research are identified. The structure of our review is based on the ripple effect concept, which represents the implications of automated vehicles...
journal article 2017
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Jiang, J. (author), Makinwa, K.A.A. (author)
This paper proposes a multipath multisensor architecture for CMOS magnetic sensors, which effectively extends their bandwidth without compromising either their offset or resolution. Two designs utilizing the proposed architecture were fabricated in a 0.18-μm standard CMOS process. In the first, the combination of spinning-current Hall sensors...
journal article 2017
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Jiang, J. (author), Makinwa, K.A.A. (author)
This paper presents a temperature-insensitive magnetic sensor system for contactless current measurements. To simultaneously achieve wide bandwidth and low noise, the proposed system employs a multi-path structure with a set of spinning current Hall sensors in its low-frequency path and a set of pick-up coils in its high-frequency path. The...
journal article 2017
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Teye, A.L. (author), Knoppel, Michel (author), de Haan, J. (author), Elsinga, M.G. (author)
Purpose: This paper aims to examine the existence of the ripple effect from Amsterdam to the housing markets of other regions in The Netherlands. It identifies which regional housing markets are influenced by house price movements in Amsterdam. Design/methodology/approach: The paper considers the ripple effect as a lead-lag effect and a long...
journal article 2017
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Jiang, J. (author), Kindt, Wilco J. (author), Makinwa, K.A.A. (author)
This paper presents a new ripple-reduction technique for spinning-current Hall sensors, which obviates the need for lowpass filtering to suppress the ripple caused by up-modulated sensor offset. A continuous-time ripple-free output is achieved by the use of three ripple reduction loops (RRLs), which continuously sense the offset ripple and then...
journal article 2014
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