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Iranzo, A. (author), Mulder, F.M. (author)The transition to renewable electricity sources and green feedstock implies the development of electricity storage and conversion systems to both stabilise the electricity grid and provide electrolytic hydrogen. We have recently introduced the concept of a hybrid Ni/Fe battery-electrolyser (battolyser) for this application1. The hydrogen...journal article 2021
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Ripepi, D. (author), Zaffaroni, R. (author), Schreuders, H. (author), Boshuizen, B. (author), Mulder, F.M. (author)Direct electrochemical nitrogen reduction holds the promise of enabling the production of carbon emission-free ammonia, which is an important intermediate in the fertilizer industry and a potential green energy carrier. Here we show a strategy for ambient condition ammonia synthesis using a hydrogen permeable nickel membrane/electrode that...journal article 2021
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Pool, D.M. (author), Zaal, P.M.T. (author), Pieters, M.A. (author), Stroosma, O. (author), Mulder, Max (author)This paper investigates the interaction effects of motion filter order and break frequency on pilots’ manual control behavior and control performance using two simulators. Eighteen pilots performed the experiment in the Vertical Motion Simulator (VMS) at NASA Ames Research Center and 20 pilots in the SIMONA Research Simulator at Delft University...journal article 2021
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Kolff, Maurice (author), Venrooij, J. (author), Schwienbacher, Markus (author), Pool, D.M. (author), Mulder, Max (author)When designing driving simulation experiments with motion cueing, it is often necessary to make choices between Motion Cueing Algorithms (MCAs) without being fully able to know how well an MCA will perform during the experiment. Choices between MCAs can therefore be greatly supported by previous measurements or predictions of motion cueing...journal article 2021
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Fu, W. (author), van Paassen, M.M. (author), Mulder, Max (author)Limitations of a haptic device can cause distortions of the force feedback it presents. Just-noticeable difference (JND) in system dynamics is important for creating transparent haptic interaction. Based on the previous work, this article presents a unified model that extends the existing JND rule. Our approach projects the JNDs in the...journal article 2020
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Arush, I. (author), Pavel, M.D. (author), Mulder, Max (author)The process of empirical models evaluation is at the core business of experimental flight-testing data analysis. Accurate and convenient flight-testing of helicopter engine(s) available power is crucial for predicting the total helicopter performance. Common practice in estimation of in-flight helicopter gas turbine engine power consists of a...journal article 2020
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van der El, Kasper (author), Pool, D.M. (author), van Paassen, M.M. (author), Mulder, Max (author)The 1960s crossover model is widely applied to quantitatively predict a human controller's (HC's) manual control behavior. Unfortunately, the theory captures only compensatory tracking behavior and, as such, a limited range of real-world manual control tasks. This article finalizes recent advances in manual control theory toward more general...journal article 2020
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Landman, H.M. (author), Groen, Eric L. (author), van Paassen, M.M. (author), Bronkhorst, Adelbert W. (author), Mulder, Max (author)Previous studies show that pilots sometimes make roll reversal errors (RREs) when responding to the aircraft bank angle shown on the attitude indicator (AI). This is suggestive of a perceptual ambiguity in the AI. In the current study, we investigated whether expectation contributes to such misperception. Twenty nonpilots performed tasks in a...journal article 2020
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Mulder, A.E. (author), Wiersma, M.G. (author), van Loenen, B. (author)The increasing need for geospatial information demands for well-organised management among all levels of society. A Spatial Data Infrastructure (SDI) is a multidisciplinary and dynamic instrument that facilitates access and sharing of geospatial information. The current trend towards open data initiatives is influencing the development of these...journal article 2020
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Giunti, Guido (author), Goossens, R.H.M. (author), de Bont, Antoinette (author), Visser, J.J. (author), Mulder, Mark (author), Schuit, Stephanie C.E. (author)The physical and social distancing measures that have been adopted worldwide because of COVID-19 will probably remain in place for a long time, especially for senior adults, people with chronic conditions, and other at-risk populations. Teleconsultations can be useful in ensuring that patients continue to receive clinical care while reducing...journal article 2020
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- Zaffaroni, R. (author), Ripepi, D. (author), Middelkoop, J. (author), Mulder, F.M. (author) journal article 2020
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Kun, P. (author), Mulder, I. (author), Kortuem, G.W. (author)The increasing availability of large-scale datasets such as sensor data or social media data and increasingly accessible data science tools create unique<br/>opportunities for design. However, the relationship between data science practices and design methods is still underdeveloped. In this paper, we propose that data exploration activities can...journal article 2020
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Biomimicry design thinking education: a base-line exercise in preconceptions of biological analogiesStevens, L.L. (author), Kopnina, Helen (author), Mulder, K.F. (author), de Vries, M.J. (author)Preliminary empirical research conducted by the leading author has shown that design students using biological analogies, or models across different contexts, often misinterpreted these, intentionally or unintentionally, during design. By copying shape or form without integrating the main function of the mimicked biological model, students...journal article 2020
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van Baelen, D. (author), Ellerbroek, Joost (author), van Paassen, M.M. (author), Mulder, Max (author)Several modern aircraft use a passive control manipulator: a spring–damper system that generates command signals to the flight control computers in combination with a flight envelope protection system that limits pilot inputs when approaching the aircraft limits. This research project aims to increase pilot awareness of this protection system...journal article 2020
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Landman, H.M. (author), van Middelaar, Sophie H. (author), Groen, Eric L. (author), van Paassen, M.M. (author), Bronkhorst, Adelbert W. (author), Mulder, Max (author)Background: Mnemonic-type startle and surprise procedures were previously proposed to help pilots cope with startle and surprise in-flight, but effects on performance after procedure execution have not yet been investigated. Objective: Thus, we tested the effectiveness a new mnemonic-type procedure in a moving-base simulator with a non-linear...journal article 2020
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Mulder, J.T. (author), Kirkwood, N.R.M. (author), De Trizio, Luca (author), Li, Chen (author), Bals, Sara (author), Manna, L. (author), Houtepen, A.J. (author)Indium phosphide quantum dots (QDs) have drawn attention as alternatives to cadmium- and lead-based QDs that are currently used as phosphors in lamps and displays. The main drawbacks of InP QDs are, in general, a lower photoluminescence quantum yield (PLQY), a decreased color purity, and poor chemical stability. In this research, we attempted...journal article 2020
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Scholten, Pepijn A. (author), van Paassen, M.M. (author), Chu, Q. P. (author), Mulder, Max (author)A variable stability in-flight simulator has the capabilities to change the response of an aircraft in-flight, often without changing the physical properties of the aircraft. The ability to adjust the aircraft response characteristics and handling qualities has various purposes, such as pilot training, control system development, and handling...journal article 2020
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van den Hoed, Annemarie (author), Landman, H.M. (author), van Baelen, D. (author), Stroosma, O. (author), van Paassen, M.M. (author), Groen, Eric L. (author), Mulder, Max (author)Objective: We tested whether a procedure in a hexapod simulator can cause incorrect assumptions of the bank angle (i.e., the “leans”) in airline pilots as well as incorrect interpretations of the attitude indicator (AI). Background: The effect of the leans on interpretation errors has previously been demonstrated in nonpilots. In-flight,...journal article 2020
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Mulder, W.A. (author)Simulations of wave propagation in the Earth usually require truncation of a larger domain to the region of interest to keep computational cost acceptable. This introduces artificial boundaries that should not generate reflected waves. Most existing boundary conditions are not able to completely suppress all the reflected energy, but suffice...journal article 2020
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Mulder, W.A. (author)The representation of a force or moment point source in a spectral finite-element code for modelling elastic wave propagation becomes fundamentally different in degenerate cases where the source is located on the boundary of an element. This difference is related to the fact that the finite-element basis functions are continuous across...journal article 2020