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Yang, Q. (author), Simão, T. D. (author), Jansen, Nils (author), Tindemans, Simon H. (author), Spaan, M.T.J. (author)Safety is critical to broadening the application of reinforcement learning (RL). Often, we train RL agents in a controlled environment, such as a laboratory, before deploying them in the real world. However, the real-world target task might be unknown prior to deployment. Reward-free RL trains an agent without the reward to adapt quickly once...conference paper 2023
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Siraj, M.M. (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)Model-based dynamic optimization of the water-flooding process in oil reservoirs is a computationally complex problem and suffers from high levels of uncertainty. A traditional way of quantifying uncertainty in robust water-flooding optimization is by considering an ensemble of uncertain model realizations. These models are generally not...conference paper 2017
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Mansoori, Mehdi (author), Dankers, Arne (author), van den Hof, P.M.J. (author), Jansen, J.D. (author), Rashtchian, Davood (author)We present a novel method for estimating physical properties of an underground hydrocarbon reservoir, on the basis of generally measured wellbore ow rate and pressure signals at the bottom of a producing well. The method uses instrumental variable-based system identification techniques to solve for a closed-loop errors-in-variables problem....conference paper 2015
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Dudzik, B.J.W. (author), Jansen, Michel Pierre (author), Burger, Franziska (author), Kaptein, F.C.A. (author), Broekens, D.J. (author), Heylen, Dirk K.J. (author), Hung, H.S. (author), Neerincx, M.A. (author), Truong, Khiet P. (author)An important aspect of human emotion perception is the use of contextual information to understand others' feelings even in situations where their behavior is not very expressive or has an emotionally ambiguous meaning. For technology to successfully detect affect, it must mimic this human ability when analyzing audiovisual input. Databases...conference paper 2019
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Diaz Cortes, G.B. (author), Vuik, Cornelis (author), Jansen, J.D. (author)We consider deflation-based pre-conditioning of the pressure equation for large-scale reservoir models with strong spatial variations in the permeabilities. The use of deflation techniques involves the search for good deflation vectors, which usually are problem-dependent. We propose the use of proper orthogonal decomposition (POD) to generate...conference paper 2016
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Jesus de Moraes, R. (author), Rodrigues, J.R.P. (author), Hajibeygi, H. (author), Jansen, J.D. (author)We present an efficient multiscale (MS) gradient computation that is suitable for reservoir management studies involving optimization techniques for, e.g., computer-assisted history matching or life-cycle production optimization. The general, algebraic framework allows for the calculation of gradients using both the Direct and Adjoint derivative...conference paper 2016
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Goncalves Dias De Barros, E. (author), Yap, F.K. (author), Insuasty, E (author), Van den Hof, PMJ (author), Jansen, J.D. (author)Closed-loop reservoir management (CLRM) is a combination of life-cycle optimization and computerassisted history matching. The application of the CLRM framework to real field cases can be computationally demanding. An even higher computational load results from procedures to assess the value of information (VOI) in CLRM. Such procedures, which...conference paper 2016
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van der Meer, J.M. (author), Kraaijevanger, JFBM (author), Möller, M. (author), Jansen, J.D. (author)Many enhanced oil recovery (EOR) processes can be described using partial differential equations with parameters that are strongly non-linear functions of one or more of the state variables. Typically these nonlinearities result in solution components changing several orders of magnitude over small spatial or temporal distances. The numerical...conference paper 2016
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Novikov, A. (author), Voskov, D.V. (author), Hajibeygi, H. (author), Jansen, J.D. (author)An increasing number of geo-energy applications require the quantitative prediction of hydromechanical response in subsurface. Integration of mass, momentum, and energy conservation laws becomes essential for performance and risk analysis of enhanced geothermal systems, stability assessment of CO2 sequestration and hydrogen storage, resolving...conference paper 2022
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Steijlen, A.S.M. (author), Bastemeijer, J. (author), Jansen, K.M.B. (author), French, P.J. (author), Bossche, A. (author)Sweat sensor patches offer new opportunities for unobtrusive monitoring of an athlete’s physical status. This paper presents a novel sweat rate and sweat conductivity patch that is easy to prototype and can be made with common low-cost production techniques: laser cutting and standard printed circuit board (PCB) manufacturing. The device...conference paper 2020
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Bozali, B. (author), van Dam, J.J.F. (author), Plaude, L. (author), Jansen, K.M.B. (author)Smart textiles have been attracting considerable interest in imparting a wide range of functions to traditional clothing ranging from sensing, actuation, data processing, and energy storage. In the case of textile-based strain sensors, most of the studies proved that they can work in principle, however, producing strain sensors with desirable...conference paper 2021
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Suvarna, Anusha Ravish (author), Koppelaar, Arie (author), Jansen, Feike (author), Wang, J. (author), Yarovoy, Alexander (author)High angular resolution is in high demand in automotive radar. To achieve a high azimuth resolution a large aperture antenna array is required. Although MIMO technique can be used to form larger virtual apertures, a large number of transmitter-receiver channels are needed, which is still technologically challenging and costly. To circumvent this...conference paper 2022
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- van der Meer, J.M. (author), Farajzadeh, R. (author), Jansen, J.D. (author) conference paper 2017
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Subramanyam, S. (author), Viola, Irene (author), Jansen, Jack (author), Alexiou, Evangelos (author), Hanjalic, A. (author), Cesar, Pablo (author)Technological advances in head-mounted displays and novel real-time 3D acquisition and reconstruction solutions have fostered the development of 6 Degrees of Freedom (6DoF) teleimmersive systems for social VR applications. Point clouds have emerged as a popular format for such applications, owing to their simplicity and versatility; yet,...conference paper 2022
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Fonseca, R.M. (author), Leeuwenburgh, O. (author), Della Rossa, E (author), van den Hof, P.M.J. (author), Jansen, J.D. (author)We consider robust ensemble-based (EnOpt) multiobjective production optimization of on/off inflow-control devices (ICDs) for a sector model inspired by a real-field case. The use of on/off valves as optimization variables leads to a discrete control problem. We propose a reparameterization of such discrete controls in terms of switching times...conference paper 2015
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El Ali, Abdallah (author), Stepanova, Ekaterina R. (author), Palande, Shalvi (author), Mader, Angelika (author), Cesar, Pablo (author), Jansen, K.M.B. (author)Sharing breathing signals has the capacity to provide insights into hidden experiences and enhance interpersonal communication. However, it remains unclear how the modality of breath signals (visual, haptic) is socially interpreted during collaborative tasks. In this mixed-methods study, we design and evaluate BreatheWithMe, a prototype for...conference paper 2023
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Röggla, Thomas (author), Wang, Chen (author), Perez Romero, Lilia (author), Jansen, Jack (author), Cesar, Pablo (author)This article presents an end-to-end system for capturing physiological sensor data and visualising it on a real-time graphic dashboard and as part of an art installation. More specifically, it describes an event where the level of engagement of the audience was measured by means of Galvanic Skin Response (GSR) sensors and of the presenter...conference paper 2017
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Jansen, B. (author), Hermans, F.F.J. (author), Tazelaar, Edwin (author)The use of spreadsheets in industry is widespread and the information that they provide is often used for decisions. Research has shown that spreadsheets are error-prone, leading to the risk that decisions are made on incorrect information. Software Evolution is a well-researched topic and the results have proven to support developers in...conference paper 2018
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Fonseca, R.M. (author), Kahrobaei, S.S. (author), Van-Gastel, L. J T (author), Leeuwenburgh, O. (author), Jansen, J.D. (author)With an increase in the number of applications of ensemble optimization (EnOpt) for production optimization, the theoretical understanding of the gradient quality has received little attention. An important factor that influences the quality of the gradient estimate is the number of samples. In this study we use principles from statistical...conference paper 2015
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Jansen, Jack (author), Subramanyam, Shishir (author), Bouqueau, Romain (author), Cernigliaro, Gianluca (author), Cabré, Marc Martos (author), Pérez, Fernando (author), Cesar, Pablo (author)The advent of affordable 3D capture and display hardware is making volumetric videoconferencing feasible. This technology increases the immersion of the participants, breaking the flat restriction of 2D screens, by allowing them to collaborate and interact in shared virtual reality spaces. In this paper we introduce the design and development...conference paper 2020