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Smit, Jordi (author)Offline reinforcement learning, or learning from a fixed data set, is an attractive alternative to online reinforcement learning. Offline reinforcement learning promises to address the cost and safety implications of taking numerous random or bad actions online, which is a crucial aspect of traditional reinforcement learning that makes it...master thesis 2021
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Smit, Jim (author)Background: The covid-19 pandemic has overwhelmed hospitals worldwide and clinical prediction models may assist in timely identification of covid-19 patients at risk for clinical deterioration, i.e. `early warning'. In this article, we report on the development and validation of a new early warning model that predicts unplanned ICU admission or...master thesis 2021
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Smit, Mitchell (author)The Electric Vehicle Routing Problem (E-VRP) is an extension of the infamous Vehicle Routing Problem which asks which routing decisions an electric vehicle needs to take in order to traverse the network efficiently. Many extensions of this problem have been subject to research in the last decade and now that electric vehicles are starting to pop...bachelor thesis 2021
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Kohabir, Amar (author), Smit, Alex (author)When symptoms of atrial fibrillation (AF), a common cardiac arrhythmia, are experienced, a Holter monitor or event recorder is used for official diagnosis. Apart from the fact that these devices are experienced as inconvenient, AF can already manifest damage in a pre-symptomatic phase. This thesis is aimed at developing a method for recording...bachelor thesis 2021
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Smit, Hein-Dirk (author)In recent years, there has been a rise of electric propeller aircraft in the field of general aviation. These propeller aircraft greatly reduce the emissions and engine noise compared to conventional aircraft, but noise coming from the propeller stays unchanged. Acoustic imaging, using beamforming, could help in the characterization of...master thesis 2021
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Smit, Jasper (author)An application-specific instruction set processor (ASIP) can provide for higher power and computationalefficiency compared to general-purpose processors. These attributes are essential for implantable medicaldevices which often run computationally intensive tasks on a strict power budget. This thesis compilesa collection of benchmarks by porting...master thesis 2021
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Smit, Beau (author)Control augmentation systems based on Incremental Nonlinear Dynamic Inversion (INDI) are able to provide high-performance nonlinear control without the need for a model of the complete system. Considering a pitch rate control law for a fixed-wing aircraft, only a model for the elevator control effectiveness (CE) and sensor feedback of the pitch...master thesis 2021
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Smit, Thijn (author)The Netherlands is building to little in wood and relies way too much on high-emission materials, such as concrete. The building culture is changing, but way to gradual. In response to the scarcity of resources, nitrogen crisis, climate change and the housing crisis, the Netherlands has to turn more to biobased materials, foremost wood, as a...master thesis 2021
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- Smit, J. M. (author), van Genderen, M. E. (author), Reinders, M.J.T. (author), Gommers, D. A.M.P.J. (author), Krijthe, J.H. (author), Van Bommel, J. (author) journal article 2021
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The Stumblemeter: Design and Validation of a System That Detects and Classifies Stumbles during Gaitden Hartog, D.D.G. (author), Harlaar, J. (author), Smit, G. (author)Stumbling during gait is commonly encountered in patients who suffer from mild to serious walking problems, e.g., after stroke, in osteoarthritis, or amputees using a lower leg prosthesis. Instead of self-reporting, an objective assessment of the number of stumbles in daily life would inform clinicians more accurately and enable the evaluation...journal article 2021
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Leclercq, E.M. (author), Smit, M.J. (author)De circulaire transitie wordt vaak gepresenteerd als uitsluitend een technologische opgave, maar deze raakt tegelijkertijd aan sociale, organisatorische en institutionele vraagstukken, die veel vragen oproepen over ontwerpprocessen, benodigde kennis en kunde, verantwoordelijkheid en taakverdeling. Het sluiten van de verschillende...report 2021
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Valentine, David Callisto (author), Smit, I.R. (author), Kim, E.D.H. (author)Trust is an important factor in building acceptance of autonomous vehicles within our society, but the complex nature of trust makes it challenging to design for an appropriate level of trust. This can lead to instances of mistrust and/or distrust between users and AV’s. Designing for calibrated trust is a possible option to address this...journal article 2021
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Creating 3d indoor first responder situation awareness in real-time through a head-mounted ar deviceSmit, Bart Peter (author), Voûte, R.L. (author), Verbree, E. (author)Emergency operations are a key example for the need of digital twins in the way it is complex, urgent and uncertain. First, the process is complex, as many organizations are involved. Second, it is urgent, as most damage is done in the first moments of an emergency. Third, it is uncertain, as situational conditions tend to change quickly. For...journal article 2021
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Culmone, C. (author), Lussenburg, K.M. (author), Alkemade, J.P.E. (author), Smit, G. (author), Sakes, A. (author), Breedveld, P. (author)In the field of medical instruments, additive manufacturing allows for a drastic reduction in the number of components while improving the functionalities of the final design. In addition, modifications for users’ needs or specific procedures become possible by enabling the production of single customized items. In this work, we present the...journal article 2021
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Smit, Jordi (author), Ponnambalam, C.T. (author), Spaan, M.T.J. (author), Oliehoek, F.A. (author)Offline reinforcement learning (RL), or learning from a fixed data set, is an attractive alternative to online RL. Offline RL promises to address the cost and safety implications of tak- ing numerous random or bad actions online, a crucial aspect of traditional RL that makes it difficult to apply in real-world problems. However, when RL is na...conference paper 2021
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Chadwell, Alix (author), Chinn, Natalie (author), Kenney, Laurence (author), Karthaus, Zoë J. (author), Mos, Daniek (author), Smit, G. (author)The Delft Self-Grasping Hand is an adjustable passive prosthesis operated using the concept of tenodesis (where opening and closing of the hand is mechanically linked to the flexion and extension of the wrist). As a purely mechanical device that does not require harnessing, the Self-Grasping Hand offers a promising alternative to current...journal article 2021
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Cuellar Lopez, J.S. (author), Plettenburg, D.H. (author), Zadpoor, A.A. (author), Breedveld, P. (author), Smit, G. (author)Various upper-limb prostheses have been designed for 3D printing but only a few of them are based on bio-inspired design principles and many anatomical details are not typically incorporated even though 3D printing offers advantages that facilitate the application of such design principles. We therefore aimed to apply a bio-inspired approach...journal article 2021
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Bodlaender, Hans L. (author), van Dobben de Bruyn, J. (author), Gijswijt, Dion (author), Smit, Harry (author)In this paper, we give a constructive proof of the fact that the treewidth of a graph is at most its divisorial gonality. The proof gives a polynomial time algorithm to construct a tree decomposition of width at most k, when an effective divisor of degree k that reaches all vertices is given. We also give a similar result for two related...journal article 2021
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Lumban-Gaol, Y. A. (author), Chen, Z. (author), Smit, M. (author), Li, X. (author), Erbaşu, M. A. (author), Verbree, E. (author), Balado Frías, J. (author), Meijers, B.M. (author), van der Vaart, C.G. (author)Point cloud data have rich semantic representations and can benefit various applications towards a digital twin. However, they are unordered and anisotropically distributed, thus being unsuitable for a typical Convolutional Neural Networks (CNN) to handle. With the advance of deep learning, several neural networks claim to have solved the...journal article 2021
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Ali, A. (author), Dodou, D. (author), Smit, G. (author), Rink, Ruben (author), Breedveld, P. (author)Positioning and stabilizing a catheter at the required location inside a vessel or the heart is a complicated task in interventional cardiology. In this review we provide a structured classification of catheter stabilization mechanisms to systematically assess their challenges during cardiac interventions. Commercially available, patented,...review 2021