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- Grootjen, M. (author), Neerincx, M.A. (author), van Erp, J.B.F. (author), Veltman, J.A. (author) conference paper 2010
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van Erp, J.B.F. (author), Veltman, J.A. (author), Grootjen, M. (author), TNO Defensie en Veiligheid (author)The future generation user system interfaces need to be user-centric which goes beyond user-friendly and includes understanding and anticipating user intentions. We introduce the concept of operator models, their role in implementing user-system symbiosis, and the usefulness of brain-based indices on for instance effort, vigilance, workload and...bookPart 2010
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van Erp, J.B.F. (author), Eriksson, L. (author), Levin, B. (author), Carlander, O. (author), Veltman, J.A. (author), Vos, W.K. (author), TNO Defensie en Veiligheid (author)Introduction: Recent evidence indicates that vibrotactile displays can potentially reduce the risk of sensory and cognitive overload. Before these displays can be introduced in super agile aircraft, it must be ascertained that vibratory stimuli can be sensed and interpreted by pilots subjected to high G loads. Methods: Each of 9 pilots...article 2007
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Hogema, J.H. (author), Veltman, J.A. (author), van 't Hof, A. (author), TNO Defensie en Veiligheid (author)The Dutch Ministry of Transport, Public Works and Water Management needs knowledge in the area of workload in car driving. This paper describes a study in which the effects of traffic volume, road lighting, and a cognitively loading secondary task on driving behaviour and workload were investigated. In a field experiment, subjects drove a fixed...bookPart 2005
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van Breda, L. (author), Jansen, C. (author), Veltman, J.A. (author), TNO Defensie en Veiligheid (author)Tele-operated unmanned aerial vehicles (UAVs) have no operators on board and therefore enable extension of the present sensing and communication capabilities in civil and military missions, without unnecessarily endangering personnel or deploying expensive material. One should also realize that tele-operation from a control centre may result in...conference paper 2005
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Veltman, J.A. (author), Vos, W.K. (author), TNO Defensie en Veiligheid (author)We conducted an experiment to explore the relation between facial temperature and mental effort. Participants had to perform mentally demanding tasks while their face was captured with an infrared camera. The temperature of the nose decreased during these tasks and increased during the successive rest blocks. Other parts of the face did not...conference paper 2005
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Veltman, J.A. (author), Vos, W.K. (author), TNO Defensie en Veiligheid (author)We conducted an experiment to explore the relation between facial temperature and mental effort. Participants had to perform mentally demanding tasks while their face was captured with an infrared camera. The temperature of the nose decreased during these tasks and increased during the successive rest periods. Other parts of the face did not...conference paper 2005
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Hogema, J.H. (author), Veltman, J.A. (author), van 't Hof, A. (author), TNO Technische Menskunde (author)The Dutch Ministry of Transport, Public Works and Water Management needs knowledge in the area of workload in car driving. This paper describes a study in which the effects of traffic volume, road lighting, and a cognitively loading secondary task on driving behaviour and workload were investigated. In a field experiment, subjects drove a fixed...conference paper 2004
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Veltman, J.A. (author), Jansen, C. (author), TNO Technische Menskunde (author)This paper presents a framework for mental workload that describes the adaptive nature of human beings in interacting with the environment. The framework is a result of many years of mental workload research in different complex task situations. This framework can be used to understand the role of mental workload in complex task situations as...conference paper 2004
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Veltman, J.A. (author), Oving, A.B. (author), Bronkhorst, A.W. (author)A flight simulator experiment was conducted to explore the benefits of 3-dimensional (3-D) audio to support in-cockpit tasks regarding performance and workload. In half of the conditions, 1 or 2 tasks requiring information from a head-down display (HDD) were supported by 3-D audio. The performance on several tasks improved when 3-D audio was...article 2004
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Oving, A.B. (author), Veltman, J.A. (author), Bronkhorst, A.W. (author)We investigated the application of 3-dimensional (3-D) audio for presenting auditory warnings in the cockpit in two simulator experiments. Pilots had to respond to warnings of the Traffic Alert and Collision Avoidance System and to system malfunction warnings. Visual warning displays were always present. The first experiment showed 12% faster...article 2004
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TNO Technische Menskunde (author), Wilson, G. (author), Schlegel, R.E. (author), Veltman, J.A. (author)The human operator is a crucial component of complex modern systems. The complexity of these systems, the rapid tempo of contemporary military operations and reduced staffing all contribute to the high cognitive demands experienced by military personnel. Unfortunately, these systems do not account for the functional state of the human operator....report 2004
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van Erp, J.B.F. (author), Veltman, J.A. (author), van Veen, H.A.H.C. (author), TNO Technische Menskunde (author)We tested the effect of a tactile torso display on keeping an instructed altitude during low level flight. The tactile instrument consisted of 64 vibrating elements attached to the torso, shoulders and thighs of the pilot. In a helicopter simulator, 12 student pilots flew under different conditions of vision (full vision and night vision) and...conference paper 2003
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- Veltman, J.A. (author), Jansen, C. (author), TNO Technische Menskunde (author) bookPart 2003
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Neerincx, M.A. (author), Veltman, J.A. (author), Grootjen, M. (author), van Veenendaal, J. (author), TNO Technische Menskunde (author)This paper summarizes a Cognitive Task Load (CTL) model, which describes the effects of (envisioned) task allocations and support functions on operator performance and mental effort. The CTL-model distinguishes three load factors: the classical measure percentage time occupied, the number of task-set switches and the level of information...conference paper 2003
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Veltman, J.A. (author), Oving, A.B. (author), TNO Technische Menskunde (author)The manual control of the camera of an unmanned aerial vehicle (UAV) can be difficult due to several factors such as 1) time delays between steering input and changes of the monitor content, 2) low update rates of the camera images and 3) lack of situation awareness due to the remote position of the operator and the small field of view of the...conference paper 2003
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van Erp, J.B.F. (author), Veltman, J.A. (author), van Veen, H.A.H.C. (author), Oving, A.B. (author)The degraded visual infoflllation when hovering with Night Vision Goggles may induce drift that is not noticed by the pilot. We tested the possibilities of counteracting these effects by using a tactile torso display. The display consisted of 64 vibro-tactile elements and presented infoflllation on the desired direction of motion only (simple...conference paper 2003
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- TNO Technische Menskunde (author), Hogema, J.H. (author), Veltman, J.A. (author), van 't Hof, A. (author) conference paper 2003
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- TNO Technische Menskunde (author), Veltman, J.A. (author) conference paper 2003
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Veltman, J.A. (author), TNO Technische Menskunde (author)During selection tests in a flight simulator and a real aircraft, physiological workload measures were evaluated. The selection context guaranteed high motivation in the participant to exert additional effort during difficult flight tasks. The aim of the study was to obtain information about the sensitivity to mental effort of several...article 2002
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