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Yang, Q. (author)In traditional reinforcement learning (RL) problems, agents can explore environments to learn optimal policies through trials and errors that are sometimes unsafe. However, unsafe interactions with environments are unacceptable in many safety-critical problems, for instance in robot navigation tasks. Even though RL agents can be trained in...doctoral thesis 2023
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Yang, Q. (author), Spaan, M.T.J. (author)Without an assigned task, a suitable intrinsic objective for an agent is to explore the environment efficiently. However, the pursuit of exploration will inevitably bring more safety risks.<br/>An under-explored aspect of reinforcement learning is how to achieve safe efficient exploration when the task is unknown.<br/>In this paper, we propose a...conference paper 2023
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Xue, H. (author), Zheng, Qianqian (author), Desmet, P.M.A. (author)Human moods are diffuse, elusive, and often difficult to articulate, yet they hold immense potential for wellbeing-centric design because they play a significant role in shaping our everyday life experiences. A person’s mood influences their experiences with a designed system, and in turn, their interactions with the design also influence their...conference paper 2023
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Giordano, A. (author), Cervone, A. (author)Interplanetary CubeSat missions are currently becoming more popular, with a significant number of recently planned missions. The context of this paper is a Mars mission, starting from a parking orbit around Earth: the adoption of a chemical propulsion system for the Earth-Mars transfer phase is investigated, considering the recent...journal article 2023
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Aydeniz, Ayhan Alp (author), Loftin, R.T. (author), Tumer, Kagan (author)Coevolving teams of agents promises effective solutions for many coordination tasks such as search and rescue missions or deep ocean exploration. Good team performance in such domains generally relies on agents discovering complex joint policies, which is particularly difficult when the fitness functions are sparse (where many joint policies...conference paper 2023
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De Kwant, Jochem (author), Hekkenberg, R.G. (author), Souflis-Rigas, A.S.R. (author), Kana, A.A. (author)This article examines the potential implications of using iron powder as an alternative fuel on the design and performance of container ships. Iron powder is a relatively new alternative energy carrier and one in which little research has been done into the application on-board vessels as part of the maritime energy transition. The key...journal article 2023
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Hirvonen, Alex (author), Leppänen, Topi (author), Hepola, Kari (author), Multanen, Joonas (author), Hoozemans, J.J. (author), Jääskeläinen, Pekka (author)Modern High Level Synthesis (HLS) tools succeed well in their engineering productivity goal, but still require toolset and target technology specific modifications to the source code to guide the process towards an efficient implementation. Furthermore, their end result is a fixed function accelerator with limited field and runtime...journal article 2023
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Li, Y. (author), Slob, E.C. (author), Werthmüller, D. (author), Wang, Lipeng (author), Lu, Hailong (author)Natural gas hydrates have been an unconventional source of energy since the beginning of this century. Gas-hydrate-filled reservoirs show higher resistivity values compared with water-filled sediments. Their presence can be detected using marine controlled-source electromagnetic methods. We classify acquisition configurations into stationary and...journal article 2023
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Ciani, Daniele (author), Sabatini, Mattia (author), Buongiorno Nardelli, Bruno (author), Lopez Dekker, F.J. (author), Rommen, Björn (author), Wethey, David S. (author), Yang, Chunxue (author), Liberti, Gian Luigi (author)The Harmony satellite mission was recently approved as the next European Space Agency (ESA) Earth Explorer 10. The mission science objectives cover several applications related to solid earth, the cryosphere, upper-ocean dynamics and air–sea interactions. The mission consists of a constellation of two satellites, flying with the Copernicus...journal article 2023
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Aljuffri, A.A.M. (author), Saxena, Mudit (author), Reinbrecht, Cezar (author), Hamdioui, S. (author), Taouil, M. (author)Security is one of the most important features that a system must provide. Depending on the application of the target device, different threats should be considered at design time. However, the attack space is vast. Hence, it is difficult to decide what components to protect, what level of protection they require and how efficient they are in...conference paper 2023
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Iannini, L. (author), Comite, D. (author), Pierdicca, N. (author), Lopez Dekker, F.J. (author)Bistatic scattering from rough surfaces is typically approached through the analysis of the scattered field in the conventional H and V polarization basis, which coincides with the zenith and azimuth unit vectors in a spherical reference frame. This study delves into the impacts of different choices of the transmit and receive linear basis on...journal article 2022
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Abel, Felix (author), Ferent, Cristian (author), Sundaramoorthy, P.P. (author), Rajan, R.T. (author)This decade has seen growing interest in Mars exploration. Advances in distributed systems, miniaturization and commoditization of space electronics and innovations in communications permit us to rethink the current paradigm of relying on a few heavy, slow and expensive high-tech rovers for Mars surface exploration. In this work, we address the...conference paper 2022
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de Vos, P. (author), de van der Schueren, T.A.R. (author), Los, S. (author), Visser, K. (author)In this paper a Concept Exploration Tool (CET) for naval ship power plants is presented. The ideas behind the CET are introduced as well as the inner workings of the tool. Objective functions for different relevant design criteria (energy efficiency, emissions, signatures, etc.) are shortly discussed, after which the results for a Frigate case...journal article 2022
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Rometsch, Flavie A.A.S.D.T. (author), Casini, Andrea E.M. (author), Drepper, Anne (author), Cowley, Aidan (author), de Winter, J.C.F. (author), Guo, J. (author)Humans are embarking on a new era of space exploration with the plan of sending crewed spacecraft to the Moon, Mars, and beyond. Extravehicular activities (EVAs) will be an essential part of the scientific activities to be carried out in these missions, and they will involve extensive geological fieldwork. These EVAs entail many challenges as...journal article 2022
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Toledo, Tania (author), Obermann, A. (author), Verdel, A. (author), Martins, Joana E. (author), Jousset, P. (author), Mortensen, A. K. (author), Erbas, Kemal (author), Krawczyk, C. M. (author)In autumn 2017 a network of 14 broadband seismic stations was deployed at the Theistareykir high temperature geothermal field (NE Iceland). This experiment was conducted as part of the current efforts to characterize the field's main structures, and possible short and long term stress variations due to the ongoing fluid injection and...journal article 2022
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Inna Kedege, V. (author), Czechowski, A.T. (author), Stellingwerff, Ludo (author), Oliehoek, F.A. (author)Distributed robots that survey and assist with search & rescue operations usually deal with unknown environments with limited communication. This paper focuses on distributed & cooperative multi-robot area coverage strategies of unknown environments, having constrained communication. Due to restricted communication there is...conference paper 2022
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Multi-objective design of aircraft maintenance using Gaussian process learning and adaptive samplingLee, J. (author), Mitici, M.A. (author)Aircraft maintenance design aims to identify strategies that render the aircraft reliable for flight in a cost-efficient manner. These are often conflicting objectives. Moreover, existing studies on maintenance design often limit themselves to only one type of maintenance strategy, overlooking other potentially dominating designs. We propose...journal article 2022
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Lupetti, M.L. (author), Van Mechelen, Maarten (author)The need for critically reflecting on the deceptive nature of advanced technologies, such as social robots, is urging academia and civil society to rethink education and the skills needed by future generations. The promotion of critical thinking, however, remains largely unaddressed within the field of educational robotics. To address this...conference paper 2022
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Vuillot, C. (author), Breuckmann, Nikolas P. (author)We introduce quantum pin codes: a class of quantum CSS codes. Quantum pin codes are a generalization of quantum color codes and Reed-Muller codes and share a lot of their structure and properties. Pin codes have gauge operators, an unfolding procedure and their stabilizers form so-called $\ell $ -orthogonal spaces meaning that the joint...journal article 2022
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Brandt, C.E. (author), Zaidman, A.E. (author)Automatically generating test cases for software has been an active research topic for many years. While current tools can generate powerful regression or crash-reproducing test cases, these are often kept separately from the maintained test suite. In this paper, we leverage the developer’s familiarity with test cases amplified from existing,...journal article 2022