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Cop, Christopher P. (author), Jakubowski, Kristen L. (author), Schouten, A.C. (author), Koopman, Bart (author), Perreault, Eric J. (author), Sartori, Massimo (author)Objective: Accurate estimation of stiffness across anatomical levels (i.e., joint, muscle, and tendon) in vivo has long been a challenge in biomechanics. Recent advances in electromyography (EMG)-driven musculoskeletal modeling have allowed the non-invasive estimation of stiffness during dynamic joint rotations. Nevertheless, validation has...journal article 2024
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Baumgartner, L.M. (author), Goryachev, A. (author), Koopman, C.I. (author), Franzen, David (author), Ellendorff, Barbara (author), Turek, Thomas (author), Vermaas, D.A. (author)CO2 electrolysis might be a key process to utilize intermittent renewable electricity for the sustainable production of hydrocarbon chemicals without relying on fossil fuels. Commonly used carbon-based gas diffusion electrodes (GDEs) enable high Faradaic efficiencies for the desired carbon products at high current densities, but have limited...journal article 2023
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Martinez Torres, C.E. (author), Grimbergen, Jos (author), Koopman, Jaap (author), Koenderink, G.H. (author)Background: Fibrinogen is a plasma protein forming the fibrin scaffold of blood clots. Its mechanical properties therefore affect the risk of bleeding as well as thrombosis. There has been much recent interest in the biophysical mechanisms controlling fibrin mechanics; however, the role of molecular heterogeneity of the circulating fibrinogen...journal article 2023
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Kalmar, E. (author), Aarts, Tom (author), Bosman, Esther (author), Ford, Camera (author), de Kluijver, Lisa (author), Beets, Josine (author), Veldkamp, Lisette (author), Timmers, Pauline (author), Besseling, Diede (author), Koopman, Joris (author), Fan, Chuntzu (author), Berrevoets, Enya (author), Trotsenburg, Melissa (author), Maton, Loes (author), van Remundt, Jill (author), Sari, Ela (author), Omar, Lee Wen (author), Beinema, Emiel (author), Winkel, R.N.W. (author), van der Sanden, M.C.A. (author)Collaborative learning is a teaching method that brings together students to discuss a topic important for a given course or curriculum and solve a related problem or create a product. By doing this, learners create knowledge together and gain 21<sup>st</sup> –century skills such as communication, critical thinking, decision making,...journal article 2022
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Oikonomopoulou, F. (author), Koniari, A.M. (author), Damen, J.T.W. (author), Koopman, D. (author), Stefanaki, M.I. (author), Bristogianni, T. (author)This paper introduces the use of structural topology optimization (TO) as a new design approach that enables the creation of monolithic load-bearing cast glass components of substantial dimensions with significantly reduced annealing times, rendering such components viable in terms of manufacturing. Using topology optimization, the glass mass...conference paper 2022
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Narrow Pressure Stability Window of Gas Diffusion Electrodes Limits the Scale-Up of CO2ElectrolyzersBaumgartner, L.M. (author), Koopman, C.I. (author), Forner-Cuenca, Antoni (author), Vermaas, D.A. (author)Electrochemical CO2 reduction is a promising process to store intermittent renewable energy in the form of chemical bonds and to meet the demand for hydrocarbon chemicals without relying on fossil fuels. Researchers in the field have used gas diffusion electrodes (GDEs) to supply CO2 to the catalyst layer from the gas phase. This approach...journal article 2022
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Cop, Christopher P. (author), Schouten, A.C. (author), Koopman, Bart (author), Sartori, Massimo (author)The simultaneous modulation of joint torque and stiffness enables humans to perform large repertoires of movements, while versatilely adapting to external mechanical demands. Multi-muscle force control is key for joint torque and stiffness modulation. However, the inability to directly measure muscle force in the intact moving human prevents...journal article 2022
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Baumgartner, L.M. (author), Koopman, C.I. (author), Forner-Cuenca, Antoni (author), Vermaas, D.A. (author)Electrochemical CO2 reduction has the potential to use excess renewable electricity to produce hydrocarbon chemicals and fuels. Gas diffusion electrodes (GDEs) allow overcoming the limitations of CO2 mass transfer but are sensitive to flooding from (hydrostatic) pressure differences, which inhibits upscaling. We investigate the effect of the...journal article 2022
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Cop, Christopher P. (author), Schouten, A.C. (author), Koopman, Bart F.J.M. (author), Sartori, M. (author)Quantifying human joint stiffness in vivo during movement remains challenging. Well established stiffness estimation methods include system identification and the notion of quasi-stiffness, with experimental and conceptual limitations, respectively. Joint stiffness computation via biomechanical models is an emerging solution to overcome such...book chapter 2022
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Cop, Christopher P. (author), Cavallo, Gaia (author), van'T Veld, Ronald C. (author), Koopman, Bart F.J.M. (author), Lataire, John (author), Schouten, A.C. (author), Sartori, Massimo (author)In vivo joint stiffness estimation during time-varying conditions remains an open challenge. Multiple communities, e.g. system identification and biomechanics, have tackled the problem from different perspectives and using different methods, each of which entailing advantages and limitations, often complementary. System identification...review 2021
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Bos, R.A. (author), Nizamis, Kostas (author), Koopman, Bart F.J.M. (author), Herder, J.L. (author), Sartori, Massimo (author), Plettenburg, D.H. (author)With recent improvements in healthcare, individuals with Duchenne muscular dystrophy (DMD) have prolonged life expectancy, and it is therefore vital to preserve their independence. Hand function plays a central role in maintaining independence in daily living. This requires sufficient grip force and the ability to modulate it with no...journal article 2020
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Waterval, Niels F.J. (author), Brehm, Merel Anne (author), Altmann, Viola C. (author), Koopman, Fieke S. (author), Den Boer, Jasper J. (author), Harlaar, J. (author), Nollet, Frans (author)In persons with calf muscle weakness, walking energy cost is commonly increased due to persistent knee flexion and a diminished push-off. Provided ankle-foot orthoses (AFOs) usually lower walking energy cost. To maximize the reduction in energy cost, AFO bending stiffness should be individually optimized, but this is not common practice....journal article 2020
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Gudjónsdóttir, S. (author), van der Stam, W. (author), Koopman, Christel (author), Kwakkenbos, Bob (author), Evers, W.H. (author), Houtepen, A.J. (author)Semiconductor films that allow facile ion transport can be electronically doped via electrochemistry, where the amount of injected charge can be controlled by the potential applied. To apply electrochemical doping to the design of semiconductor devices, the injected charge has to be stabilized to avoid unintentional relaxation back to the...journal article 2019
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Janssen, Mariska M.H.P. (author), Harlaar, J. (author), Koopman, Bart (author), de Groot, Imelda J.M. (author)This study aimed to identify critical physiological outcome variables underlying reduced upper extremity task performance in Duchenne muscular dystrophy (DMD). These critical variables were used to propose an explanatory biophysical model of the upper extremity working mechanisms in DMD. Twenty-three DMD patients (8–21 years) participated in...journal article 2019
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Gudjónsdóttir, S. (author), Houtepen, A.J. (author), Koopman, Christel (author)Electronic doping of semiconductor nanomaterials can be efficiently achieved using electrochemistry. However, the injected charge carriers are usually not very stable. After disconnecting the cell that is used for electrochemical doping the carrier density drops, typically in several minutes. While there are multiple possible causes for this, we...journal article 2019
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Kooren, P.N. (author), Dunning, A.G. (author), Janssen, M.M.H.P. (author), Lobo-Prat, J. (author), Koopman, B.F.J.M. (author), Paalman, M.I. (author), de Groot, I.J.M. (author), Herder, J.L. (author)Background Persons suffering from progressive muscular weakness, like those with Duchenne muscular dystrophy (DMD), gradually lose the ability to stand, walk and to use their arms. This hinders them from performing daily activities, social participation and being independent. Wheelchairs are used to overcome the loss of walking. However, there...journal article 2015
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Koopman, F.W.A. (author), Michel, J. (author), Roos, J. (author), Stroux, S.A. (author), Quist, W.J. (author)De zes hallen in de noordwestelijke hoek van Oostenburg in Amsterdam zijn eigendom van Woningbouwcorporatie Stadgenoot.1 Deze corporatie kocht in 2008 een groot deel van Oostenburg aan om dit gebied zelf te gaan ontwikkelen. De recente regelgeving heeft de mogelijkheden voor de corporaties beperkt. Stadgenoot zal nu het grootste deel van de...report 2015
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Van den Broek, M. (author), Bolat, I. (author), Nijkamp, J.F. (author), Ramos, E. (author), Luttik, M.A.H. (author), Koopman, F. (author), Geertman, J.M. (author), De Ridder, D. (author), Pronk, J.T. (author), Daran, J.M. (author)Lager brewing strains of Saccharomyces pastorianus are natural interspecific hybrids originating from the spontaneous hybridization of Saccharomyces cerevisiae and Saccharomyces eubayanus. Over the past 500 years, S. pastorianus has been domesticated to become one of the most important industrial microorganisms. Production of lager-type beers...journal article 2015
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Lobo-Prat, J. (author), Kooren, P.N. (author), Stienen, A.H.A. (author), Herder, J.L. (author), Koopman, B.F.J.M. (author), Veltink, P.H. (author)Active movement-assistive devices aim to increase the quality of life for patients with neuromusculoskeletal disorders. This technology requires interaction between the user and the device through a control interface that detects the user’s movement intention. Researchers have explored a wide variety of invasive and non-invasive control...journal article 2014
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Lobo-Prat, J. (author), Keemink, A.Q.L. (author), Stienen, A.H.A. (author), Schouten, A.C. (author), Veltink, P.H. (author), Koopman, B.F.J.M. (author)Background: The performance capabilities and limitations of control interfaces for the operation of active movement-assistive devices remain unclear. Selecting an optimal interface for an application requires a thorough understanding of the performance of multiple control interfaces. Methods: In this study the performance of EMG-, force- and...journal article 2014