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Recent Submissions 

  1. Beyond 50 MHz Bandwidth Extension of Commercial DC-Current Measurement Sensors With Ultra-Compact PCB-Integrated Pickup Coils 

    Niklaus, Pascal S.; Bortis, Dominik; Kolar, Johann W. (2022)
    IEEE Transactions on Industry Applications
    The control of very high switching frequency power electronic converter systems featuring latest generation wide bandgap devices requires current measurements with a very high bandwidth (BW) to achieve high closed-loop control dynamics. One example is an ultrahigh BW 4.8 MHz parallel-interleaved multilevel GaN inverter ac power source with a target large-signal output BW of 100 kHz. This work investigates the combination of commercially ...
    Journal Article
  2. Solvent Controls Nanoparticle Size during Nanoprecipitation by Limiting Block Copolymer Assembly 

    Bovone, Giovanni; Cousin, Lucien; Steiner, Fabian; et al. (2022)
    Macromolecules
    Control of the properties of nanoparticles (NPs), including size, is critical for their application in biomedicine and engineering. Polymeric NPs are commonly produced by nanoprecipitation, where a solvent containing a block copolymer is mixed rapidly with a nonsolvent, such as water. Empirical evidence suggests that the choice of solvent influences NP size; yet, the specific mechanism remains unclear. Here, we show that solvent controls ...
    Journal Article
  3. Units - Student's Friend or Fiend? 

    Cvengros, Jan (2022)
    Chimia
    The idea behind this column is to point out the diffi-culties that students or pupils often have when solving prob-lems that require handling units. These include the use of the proper unit for the corresponding physical quantity during the calculation, analysis of the units and providing the result as a numerical value with the correct unit. A wish to join the efforts of all teachers to solve this problem is also expressed.
    Journal Article
  4. Under the Sand: Navigation and Localization of a Micro Aerial Vehicle for Landmine Detection with Ground-Penetrating Synthetic Aperture Radar 

    Bähnemann, Rik; Lawrance, Nicholas; Streichenberg, Lucas; et al. (2022)
    Field Robotics
    Ground-penetrating radar mounted on a micro aerial vehicle (MAV) is a promising tool to assist humanitarian landmine clearance. However, the quality of synthetic aperture radar images depends on accurate and precise motion estimation of the radar antennas as well as generating informative viewpoints with the MAV. This paper presents a complete and automatic airborne ground-penetrating synthetic aperture radar (GPSAR) system. The system ...
    Journal Article
  5. Toward a general calibration of the Swiss plate geophone system for fractional bedload transport 

    Nicollier, Tobias; Antoniazza, Gilles; Ammann, Lorenz; et al. (2022)
    Earth Surface Dynamics
    Substantial uncertainties in bedload transport predictions in steep streams have encouraged intensive efforts towards the development of surrogate monitoring technologies. One such system, the Swiss plate geophone (SPG), has been deployed and calibrated in numerous steep channels, mainly in the Alps. Calibration relationships linking the signal recorded by the SPG system to the intensity and characteristics of transported bedload can vary ...
    Journal Article
  6. CHanalysis 2022-Back to the Future of Analytical Excellence 

    Bleiner, Davide; Suter, Marc; Bakker, Eric (2022)
    Chimia
    Other Journal Item
  7. Dynamics-based machine learning of transitions in Couette flow 

    Kaszas, Balint; Cenedese, Mattia; Haller, George (2022)
    Physical Review Fluids
    We derive low-dimensional, data-driven models for transitions among exact coherent states in one of the most studied canonical shear flows, the plane Couette flow. These one -or two-dimensional nonlinear models represent the leading-order reduced dynamics on attracting spectral submanifolds (SSMs), which we construct using the recently developed SSMLearn algorithm from a small number of simulated transitions. We find that the energy input ...
    Journal Article
  8. Continual Adaptation of Semantic Segmentation Using Complementary 2D-3D Data Representations 

    Frey, Jonas; Blum, Hermann; Milano, Francesco; et al. (2022)
    IEEE Robotics and Automation Letters
    Semantic segmentation networks are usually pretrained once and not updated during deployment. As a consequence, misclassifications commonly occur if the distribution of the training data deviates from the one encountered during the robot's operation. We propose to mitigate this problem by adapting the neural network to the robot's environment during deployment, without any need for external supervision. Leveraging complementary data ...
    Journal Article
  9. Union carbide polymerization catalysts: from uncovering active site structures to designing molecularly-defined analogs 

    Trummer, David; Nobile, Anna Giorgia; Payard, Pierre-Adrien; et al. (2022)
    Chemical Science
    The Union Carbide (UC) ethylene polymerization catalysts, based on chromocene dispersed on silica, show distinct features from the Phillips catalysts, but share the same heated debate regarding the structure of their active sites. Based on a combination of IR, EPR spectroscopies, labeling experiments, and DFT modeling, we identified monomeric surface-supported Cr(III) hydrides, ( SiO)Cr(Cp)-H, as the active sites of the UC catalyst. These ...
    Journal Article
  10. Hybrid Microfluidic Device for High Throughput Isolation of Cells Using Aptamer Functionalized Diatom Frustules 

    Mohammadi, Rashin; Asghari, Mohammad; Colombo, Monika; et al. (2022)
    Chimia
    Circulating tumor cells (CTCs), secreted from primary and metastatic malignancies, hold a wealth of es-sential diagnostic and prognostic data for multiple cancers. Significantly, the information contained within these cells may hold the key to understanding cancer metastasis, both individually and fundamentally. Accordingly, developing ways to identify, isolate and interrogate CTCs plays an essential role in modern cancer research. ...
    Journal Article
  11. Stable Isotope Analysis of Greenhouse Gases Requires Analyte Preconcentration 

    Kantnerova, Kristyna; Barthel, Matti; Six, Johan; et al. (2022)
    Chimia
    Nitrous oxide (N2O) is an important trace gas contributing to global warming and depletion of ozone in the stratosphere. Its increasing abundance is caused mainly by anthropogenic sources, such as application of fertilizers in agriculture or emissions from industry. To understand the N2O global budget, its sources and sinks need to be well-described and quantified. In this project, a new method for N2O source appointment was de-veloped ...
    Journal Article
  12. Bipartite phosphoinositide-dependent modulation of auxin signaling during xylem differentiation in Arabidopsis thaliana roots 

    von der Mark, Claudia; Cruz, Tiago M. D.; Blanco-Tourinan, Noel; et al. (2022)
    New Phytologist
    Efficient root-to-shoot delivery of water and nutrients in plants relies on the correct differentiation of xylem cells into hollow elements. While auxin is integral to the formation of xylem cells, it remains poorly characterized how each subcellular pool of this hormone regulates this process. Combining genetic and cell biological approaches, we investigated the bipartite activity of nucleoplasmic vs plasma membrane-associated ...
    Journal Article
  13. Light-driven high-precision cell adhesion kinetics 

    Zhang, Zhiyuan; Ahmed, Daniel (2022)
    LIGHT-SCIENCE & APPLICATIONS
    Existing single-cell adhesion kinetics methods are performed under conditions highly unlike the physiological cell adhesion conditions. Now, researchers have developed a new optical technique for high-precision measurement of cell lateral adhesion kinetics in complex clinical samples.
    Other Journal Item
  14. Digitally fabricated ribbed concrete floor slabs: a sustainable solution for construction 

    Mata Falcón, Jaime; Bischof, Patrick; Huber, Tobias; et al. (2022)
    RILEM Technical Letters
    Journal Article
  15. Photoredox Activation of Anhydrides for the Solvent-Controlled Switchable Synthesis of gem-Difluoro Compounds 

    Giri, Rahul; Mosiagin, Ivan; Franzoni, Ivan; et al. (2022)
    Angewandte Chemie. International Edition
    The incorporation of the gem-difluoromethylene (CF2) group into organic frameworks is highly sought due to the influence of this unit on the physicochemical and pharmacological properties of molecules. Herein we report an operationally simple, mild, and switchable protocol to access various gem-difluoro compounds that employs chlorodifloroacetic anhydride (CDFAA) as a low-cost and versatile fluoroalkylating reagent. Detailed mechanistic ...
    Journal Article
  16. Ionic poly(dimethylsiloxane)-silica nanocomposites: Dispersion and self-healing 

    Mugemana, Clément; Moghimikheirabadi, Ahmad; Arl, Didier; et al. (2022)
    MRS Bulletin
    Poly(dimethylsiloxane) (PDMS)-based nanocomposites have attracted increasing attention due to their inherent outstanding properties. Nevertheless, the realization of high levels of dispersion of nanosilicas in PDMS represents a challenge arising from the poor compatibility between the two components. Herein, we explore the use of ionic interactions located at the interface between silica and a PDMS matrix by combining anionic sulfonate- ...
    Journal Article
  17. Discrete choice modeling with anonymized data 

    Balac, Milos; Hörl, Sebastian; Schmid, Basil (2022)
    Transportation
    This paper presents an approach to estimate mode-choice models from spatially anonymized revealed preference travel survey data. We propose an algorithm to find a feasible sequence of activity locations for each individual that minimizes the maximum error of each trip’s Euclidean distance within the activity chain. The synthetic activity locations are then used to create unchosen alternatives within the choice set for each individual. ...
    Journal Article
  18. Learning to tango with four (or more): the molecular basis of adaptation to polyploid meiosis 

    Bomblies, Kirsten (2022)
    Plant Reproduction
    Journal Article
  19. An Energy Efficient STDP-Based SNN Architecture With On-Chip Learning 

    Sun, Congyi; Sun, Haohan; Xu, Jin; et al. (2022)
    IEEE Transactions on Circuits and Systems I: Regular Papers
    In this paper, we propose a spike-time based unsupervised learning method using spiking-timing dependent plasticity (STDP). A simplified linear STDP learning rule is proposed for the energy efficient weight updates. To reduce unnecessary computations for the input spike values, a stop mechanism of the forward pass is introduced in the forward pass. In addition, a hardware-friendly input quantization scheme is used to reduce the computational ...
    Journal Article
  20. Factors associated with an unsuccessful fast-track course following minimally invasive surgical mitral valve repair 

    Van Praet, Karel M.; Kofler, Markus; Hirsch, Solveig; et al. (2022)
    European Journal of Cardio-Thoracic Surgery
    OBJECTIVES: Analyses of fast-track (FT) processes demonstrated that low-risk cardiac surgical patients require minimal intensive care, with a low incidence of mortality or morbidity. We investigated perioperative factors and their association with fast-track failure (FTF) in a retrospective cohort study of patients undergoing minimally invasive mitral valve surgery.
    Journal Article

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