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van de Ven, Daan (author), Hofland, Bas (author), van Kester, Dennis (author), Smith, Greg (author), Antonini, A. (author)When constructing land reclamations, often sand is placed on top of the coarse rock of the bund surrounding the reclamation. The use of a geometrically open filter between the interface of sand and rock could be cost effective. It is expected that even a geometrically open filter with sand on top of gravel might be stable due to the arching...conference paper 2023
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Nannini, Luca (author), Balayn, A.M.A. (author), Smith, Adam Leon (author)Public attention towards explainability of artificial intelligence (AI) systems has been rising in recent years to offer methodologies for human oversight. This has translated into the proliferation of research outputs, such as from Explainable AI, to enhance transparency and control for system debugging and monitoring, and intelligibility of...conference paper 2023
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Dutta, Shamak (author), Wilde, N. (author), Tokekar, Pratap (author), Smith, Stephen L. (author)We study the sample placement and shortest tour problem for robots tasked with mapping environmental phenomena modeled as stationary random fields. The objective is to minimize the resources used (samples or tour length) while guaranteeing estimation accuracy. We give approximation algorithms for both problems in convex environments. These...conference paper 2023
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Dutta, Shamak (author), Wilde, N. (author), Smith, Stephen L. (author)We consider a general form of the sensor scheduling problem for state estimation of linear dynamical systems, which involves selecting sensors that minimize the trace of the Kalman filter error covariance (weighted by a positive semidefinite matrix) subject to polyhedral constraints. This general form captures several well-studied problems...conference paper 2023
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Botros, Alexander (author), Sadeghi, Armin (author), Wilde, N. (author), Alonso-Mora, J. (author), Smith, Stephen L. (author)Many problems in robotics seek to simultaneously optimize several competing objectives under constraints. A conventional approach to solving such multi-objective optimization problems is to create a single cost function comprised of the weighted sum of the individual objectives. Solutions to this scalarized optimization problem are Pareto...conference paper 2023
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Noom, J. (author), Soloviev, O.A. (author), Smith, C.S. (author), Nguyen, Hieu Thao (author), Verhaegen, M.H.G. (author)We demonstrate a novel closed-loop input design technique on the detection of particles in an imaging system such as a fluorescence microscope. The probability of misdiagnosis is minimized while constraining the input energy such that for instance phototoxicity is reduced. The key novelty of the closed-loop design is that each next input is...conference paper 2022
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Noom, J. (author), Soloviev, O.A. (author), Smith, C.S. (author), Verhaegen, M.H.G. (author)Some applications require high level of image-based classification certainty while keeping the total illumination energy as low as possible. Examples are minimally invasive visual inspection in Industry 4.0, and medical imaging systems such as computed tomography, in which the radiation dose should be kept “as low as is reasonably achievable”...conference paper 2022
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Dutta, Shamak (author), Wilde, N. (author), Smith, Stephen L. (author)In this paper, we consider a subset selection problem in a spatial field where we seek to find a set of k locations whose observations provide the best estimate of the field value at a finite set of prediction locations. The measurements can be taken at any location in the continuous field, and the covariance between the field values at...conference paper 2022
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Dutta, Shamak (author), Wilde, N. (author), Smith, Stephen L. (author)We present a new mixed integer formulation for the discrete informative path planning problem in random fields. The objective is to compute a budget constrained path while collecting measurements whose linear estimate results in minimum error over a finite set of prediction locations. The problem is known to be NP-hard. However, we strive to...conference paper 2022
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Cai, Yifan (author), Dahiya, Abhinav (author), Wilde, N. (author), Smith, Stephen L. (author)In this paper, we consider the problem of allocating human operator assistance in a system with multiple autonomous robots. Each robot is required to complete independent missions, each defined as a sequence of tasks. While executing a task, a robot can either operate autonomously or be teleoperated by the human operator to complete the task at...conference paper 2022
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Smith, C.G. (author), Shepherd, Jami (author), Renaud, G.G.J. (author), van Wijk, Kasper (author)By changing the ultrasonic receiving angle in post-processing, we can obtain flow vectors from a photoacoustic experiment on a blood vessel phantom by solving the photoacoustic Doppler equation using a least-squares optimisation approach.conference paper 2022
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Hung, S. (author), Cnossen, J.P. (author), Fan, D. (author), Smith, C.S. (author)Optical sectioning technologies achieve high precision localization by reducing the background photon count. We use tilted light-sheet microscopy to achieve optical sectioning in localization microscopy, enabling thick sample observation and low background photon count images. A deformable mirror was incorporated to generate a tetrapod point...conference paper 2021
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Gedon, Daniel (author), Piscaer, P.J. (author), Batselier, K. (author), Smith, C.S. (author), Verhaegen, M.H.G. (author)An extension of the Tensor Network (TN) Kalman filter [2], [3] for large scale LTI systems is presented in this paper. The TN Kalman filter can handle exponentially large state vectors without constructing them explicitly. In order to have efficient algebraic operations, a low TN rank is required. We exploit the possibility to approximate the...conference paper 2019
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Scharenborg, O.E. (author), Koemans, Jiska (author), Smith, Cybelle (author), Hasegawa-Johnson, Mark (author), Federmeier, Kara D. (author)There is ample evidence showing that listeners are able to quickly adapt their phoneme classes to ambiguous sounds using a process called lexically-guided perceptual learning. This paper presents the first attempt to examine the neural correlates underlying this process. Specifically, we compared the brain’s responses to ambiguous [f/s] sounds...conference paper 2019
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Cristiano, E. (author), ten Veldhuis, Marie-claire (author), Wright, Daniel B. (author), Smith, James A. (author), van de Giesen, N.C. (author)Rainfall spatial and temporal variability are key points in the prediction of hydrological response. At the same time, catchment scale and characteristics also play important roles, especially in urban areas, where the high level of imperviousness combined with intense and localised rainfall causes fast responses (Ochoa-Rodriguez et al., 2015)....conference paper 2018
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Perez Rodriguez, P. (author), Digdaya, I.A. (author), Mangel Raventos, A. (author), Falkenberg, M. (author), Vasudevan, R.A. (author), Zeman, M. (author), Smith, W.A. (author), Smets, A.H.M. (author)One of the main problems of renewable energies is storage of the energy carrier. For long-term storage, solar fuels seem to be a good option. Direct solar water splitting could play an important role in the production of these solar fuels. One of the main challenges of this process is the charge separation and collection at the interfaces. The...conference paper 2016
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Van Der Lippe, Tim (author), Smith, Thomas (author), Pelsmaeker, Daniël (author), Visser, Eelco (author)In this paper, we report on our experience in teaching a course on concepts of programming languages at TU Delft based on Krishnamurthi's PAPL book with the definitional interpreter approach using Scala as meta-language and using the WebLab learning management system. In particular, we discuss our experience with encoding of definitional...conference paper 2016
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Heard, P (author), Šavija, B. (author), Liu, D (author), Smith, GE (author), Hallam, KR (author), Schlangen, E. (author), Flewitt, P.E.J. (author)In quasibrittle materials the addition of specific microstructural features such as porosity can lead to departure from linear elastic behaviour prior to maximum force, followed by graceful failure. A simple but extreme example is reticulated vitreous carbon foam, with its opencell structure of brittle ligaments connected in a threedimensional...conference paper 2016
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Mirmomeni, M. (author), Heidarpour, A. (author), Schlangen, E. (author), Smith, S (author)Concrete is recognized for being a fire-resistant construction material. At elevated temperatures concrete can, however, undergo considerable damage such as strength degradation, cracking, and explosive spalling. In recent decades, reuse of fire-damaged concrete structures by means of developing techniques to repair the degraded material has...conference paper 2016
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Liu, D. (author), Heard, P. (author), Savija, B. (author), Smith, G. (author), Schlangen, E. (author), Flewitt, P. (author)In the present work, the microstructure and mechanical properties of Gilsocarbon graphite have been characterized over a range of length-scales. Optical imaging, combined with 3D X-ray computed tomography and 3D high-resolution tomography based on focus ion beam milling has been adopted for microstructural characterization. A range of small...conference paper 2015
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