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Meskers, A.J.H. (author), Houben, M.M.J. (author), Pennings, H.J.M. (author), Clément, G. (author), Groen, E.L. (author)
BACKGROUND: During large angles of self-tilt in the roll plane on Earth, measurements of the subjective visual vertical (SVV) in the dark show a bias towards the longitudinal body axis, reflecting a systematic underestimation of self-tilt. OBJECTIVE: This study tested the hypothesis that self-tilt is underestimated in partial gravity conditions,...
article 2021
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Steinman, Y. (author), Groen, E. (author), Frings-Dresen, M.H.W. (author)
The purpose of the present study was to determine how hypoxia effects awareness of environment (AoE) in helicopter pilots operating at high altitude. Eight helicopter crews flew two operational flights in a flight simulator while breathing gas mixtures of 20.9% (equivalent to 0 m altitude) and 11.4% (equivalent to 4572 m or 15,000 ft altitude)...
article 2021
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Deutz, D.B. (author), van der Zwaag, S. (author), Groen, P. (author)
As demand rises for flexible electronics, traditionally prepared sintered ceramic sensors must be transformed into fully new sensor materials that can bend and flex in use and integration. Negative temperature coefficient of resistance (NTC) ceramic thermistors are preferred temperature sensors for their high accuracy and excellent stability,...
article 2020
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Pennings, H.J.M. (author), Oprins, E.A.P.B. (author), Wittenberg, H. (author), Houben, M.M.J. (author), Groen, E.L. (author)
BACKGROUND: Spatial disorientation (SD) remains a significant cause of accidents and near accidents. A variety of training methods have been used to assist pilots to anticipate the SD problem. The value of such training in the prevention of disorientation has been difficult to assess.METHODS: To study transfer of SD awareness training, we...
article 2020
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van Kempen, S.E. (author), Khanbareh, H. (author), Groen, P. (author), Hol, J.M.A.M. (author), van der Zwaag, S. (author)
A novel method based on the Virtual Particle Mori–Tanaka (VPMT) is developed to predict the effective electro-elastic properties, d33 and g33, of structured piezoelectric particulate composites with improved accuracy by means of a single parameter related to the spatial distribution of imperfectly aligned rod-like PZT particles. The VPMT method...
article 2020
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Landman, A. (author), van Middelaar, S.H. (author), Groen, E.L. (author), van Paassen, M.M. (author), Bronkhorst, A.W. (author), Mulder, M. (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...
article 2020
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Stuber, V.L. (author), Mahon, T.R. (author), van der Zwaag, S. (author), Groen, P. (author)
Polymer-piezoceramic composites have drawn a lot of attention for sensor and energy harvesting applications. Poling such materials can be difficult due to the electric field getting mostly distributed over the low dielectric constant matrix. During this process, the electrical matrix conductivity plays a vital role. This work shows how two...
article 2020
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van den Hoed, A. (author), Landman, A. (author), van Baelen, D. (author), van Paassen, R. (author), Groen, E.L. (author), Mulder, M. (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,...
article 2020
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Landman, A. (author), Groen, E.L. (author), van Paassen, M.M.R. (author), Bronkhorst, A.W. (author), Mulder, M. (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...
article 2020
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Bottenheft, C. (author), Brouwer, A.M. (author), Stuldreher, I. (author), Groen, E. (author), van Erp, J. (author)
article 2020
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Naus, F.L. (author), Schot, P. (author), Groen, K. (author), Ahmed, K.M. (author), Griffioen, J. (author)
In the southwestern coastal region of Bangladesh, options for drinking water are limited by groundwater salinity. To protect and improve the drinking water supply, the large variation in groundwater salinity needs to be better understood. This study identifies the palaeo and present-day hydrological processes and their geographical or geological...
article 2019
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Zhao, D. (author), Lenz, T. (author), Gelinck, G.H. (author), Groen, P. (author), Damjanovic, D. (author), de Leeuw, D.M. (author), Katsouras, I. (author)
Depolarization in ferroelectric materials has been studied since the 1970s, albeit quasi-statically. The dynamics are described by the empirical Merz law, which gives the polarization switching time as a function of electric field, normalized to the so-called activation field. The Merz law has been used for decades; its origin as domain-wall...
article 2019
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Stuber, V.L. (author), Deutz, D.B. (author), Bennett, J. (author), Cannel, D. (author), de Leeuw, D.M. (author), van der Zwaag, S. (author), Groen, P. (author)
Vibrational piezoelectric energy harvesters are being investigated to replace batteries in embedded sensor systems. The energy density that can be harvested depends on the figure of merit, d 33 g 33 , where d 33 and g 33 are the piezoelectric charge and voltage coefficient. Commonly used piezoelectric materials are based on inorganic ceramics,...
article 2019
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Landman, A. (author), Davies, S. (author), Groen, E.L. (author), van Paassen, M.M.R. (author), Lawson, N.J. (author), Bronkhorst, A.W. (author), Mulder, M. (author)
We hypothesized that an incorrect expectation due to spatial disorientation may induce roll reversal errors. To test this, an in-flight experiment was performed, in which forty non-pilots rolled wings level after receiving motion cues. A No-leans condition (subthreshold motion to a bank angle) was included, as well as a Leans-opposite condition ...
article 2019
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Khaliq, J. (author), Hoeks, T. (author), Groen, P. (author)
In this paper, we present a method to create a highly sensitive piezoelectric quasi 1–3 composite using a thermoplastic material filled with a piezoelectric powder. An up-scalable high-temperature dielectrophoresis (DEP) process is used to manufacture the quasi 1–3 piezoelectric polymer-ceramic composites. For this work, thermoplastic cyclic...
article 2019
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Ledegang, W.D. (author), Groen, E.L. (author)
BACKGROUND: Adequate instrument scanning is considered an important countermeasure against spatial disorientation (SD). Remarkably, literature on the relation between SD and pilots’ visual scanning is scarce. The objective of this simulator study was to investigate the influence of SD on pilots’ visual scanning and flight performance. METHODS:...
article 2018
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Landman, H.M. (author), van Oorschot, P. (author), van Paassen, M.M. (author), Groen, E.L. (author), Bronkhorst, A.W. (author), Mulder, M. (author)
Objective: This study tested whether simulator-based training of pilot responses to unexpected or novel events can be improved by including unpredictability and variability in training scenarios. Background: Current regulations allow for highly predictable and invariable training, which may not be sufficient to prepare pilots for unexpected or...
article 2018
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Deutz, D.B. (author), Pascoe, J.A. (author), Schelen, B. (author), van der Zwaag, S. (author), de Leeuw, D.M. (author), Groen, P. (author)
Piezoelectric energy harvesters are at the front of scientific research as enablers of renewable, sustainable energy for autonomous wireless sensor networks. Crucial for this disruptive technology is the achievable output power. Here we show, analytically, that the maximum output energy per unit volume, under a single sinusoidal excitation, is...
article 2018
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Abbel, R. (author), Galagan, Y. (author), Groen, P. (author)
The production of electronic devices using solution based (“wet”) deposition technologies has some decisive technical and commercial advantages compared to competing approaches like vacuum based (“dry”) manufacturing. Particularly, the potential to scale up production processes to large areas and high volumes by introducing continuous roll‐to...
article 2018
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van Stee, M.F. (author), de Graaf, A.A. (author), Groen, A.K. (author)
Patients with diabetes type 2 have an increased risk for cardiovascular disease and commonly use combination therapy consisting of the anti-diabetic drug metformin and a cholesterol-lowering statin. However, both drugs act on glucose and lipid metabolism which could lead to adverse effects when used in combination as compared to monotherapy. In...
article 2018
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