Searched for: author%3A%22de+Vries%2C+S.C.%22
(1 - 14 of 14)
document
van Emmerik, M.L. (author), de Vries, S.C. (author), Bos, J.E. (author)
People playing computer games sometimes experience a form of visually induced motion sickness called cybersickness. This phenomenon poses a problem for the entertainment market as well as the practice of training, where serious gaming is gaining acceptance as a new way of training. Although cybersickness can be considered a multifactor problem,...
article 2011
document
Koenderink, J.J. (author), Albertazzi, L. (author), van Doorn, A.J. (author), van Ee, R. (author), van de Grind, W.A. (author), Kappers, A.M.L. (author), Lappin, J.S. (author), Norman, J.F. (author), Oomes, A.H.J. (author), te Pas, S.F. (author), Phillips, F. (author), Pont, S.C. (author), Richards, W.A. (author), Todd, J.T. (author), Verstraten, F.A.J. (author), de Vries, S.C. (author), TNO Defensie en Veiligheid (author)
The issue of the existence of planes—understood as the carriers of a nexus of straight lines—in the monocular visual space of a stationary human observer has never been addressed. The most recent empirical data apply to binocular visual space and date from the 1960s (Foley, 1964). This appears to be both the first and the last time this basic...
article 2010
document
Bijl, P. (author), de Vries, S.C. (author)
Video of visual acuity (VA) and contrast sensitivity (CS) test charts in a complex background was recorded using a CCD color camera mounted on a computer-controlled tripod and was fed into real-time MPEG-2 compression/decompression equipment. The test charts were based on the triangle orientation discrimination (TOD) test method and contained...
article 2010
document
Bos, J.E. (author), de Vries, S.C. (author), van Emmerik, M.L. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Field of view (FOV) is said to affect visually induced motion sickness. FOV, however, is characterized by an internal setting used by the graphics generator (iFOV) and an external factor determined by screen size and viewing distance (eFOV). We hypothesized that especially the incongruence between iFOV and eFOV would lead to sickness. To that...
article 2010
document
de Vries, S.C. (author), van Erp, J.B.F. (author), Kiefer, R.J. (author), TNO Defensie en Veiligheid (author)
This laboratory study examined the possibility of using a car seat instrumented with tactile display elements (tactors) to communicate directional information to a driver. A car seat fitted with an 8 by 8 matrix of tactors embedded in the seat pan was used to code eight different directions.Localization performance (speed and accuracy) was...
article 2009
document
Hogema, J.H. (author), de Vries, S.C. (author), van Erp, J.B.F. (author), Kiefer, R.J. (author), TNO Defensie en Veiligheid (author)
This in-traffic, field study examined the merit of using a car seat instrumented with tactile stimulation elements (tactors) to communicate directional information to a driver. A car seat fitted with an 8 x 8 matrix of tactors embedded in the seat pan was used to code eight different directions (the four cardinal and four oblique directions)....
article 2009
document
TNO Defensie en Veiligheid (author), Bijl, P. (author), de Vries, S.C. (author)
Video of Visual Acuity (VA) and Contrast Sensitivity (CS) test charts in a complex background was recorded using a CCD camera mounted on a computer-controlled tripod and fed into real-time MPEG2 compression/decompression equipment. The test charts were based on the Triangle Orientation Discrimination (TOD) test method and contained triangle test...
conference paper 2009
document
TNO Defensie en Veiligheid (author), Toet, A. (author), de Vries, S.C. (author), van Emmerik, M.L. (author), Bos, J.E. (author)
We used a desktop computer game environment to study the effect Field-of-View (FOV) on cybersickness. In particular, we examined the effect of differences between the internal FOV (iFOV, the FOV which the graphics generator is using to render its images) and the external FOV (eFOV, the FOV of the presented images as seen from the physical...
conference paper 2008
document
de Vries, S.C. (author), Bos, J.E. (author), van Emmerik, M.L. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
In an experiment with a computer game environment, we studied the effect of Field-of-View (FOV) on cybersickness. In particular, we examined the effect of differences between the internal FOV (IFOV, the FOV which the graphics generator is using to render its images) and the external FOV (EFOV, the FOV of the presented images as seen from the...
conference paper 2007
document
Jansen, C. (author), de Vries, S.C. (author), Duistermaat, M. (author), TNO Defensie en Veiligheid (author)
Future Unmanned Aerial Vehicles (UAV) will collaborate more directly with military manned aircraft. TNO Defence, Security and Safety investigated how to present UAV sensor images in a fighter aircraft cockpit in order to maximize target identification and flying performance. Ten military pilots performed several Close Air Support missions in a...
conference paper 2006
document
de Vries, S.C. (author), Jansen, C. (author)
conference paper 2002
document
Kappé, B. (author), de Vries, S.C. (author)
Simulators have been used as a tool for training for many decades, and they are still gaining importance. Originally built for stand-alone use, the emergence of (global) network communication allowed these simulators to be connected with other simulators. This introduced the possibility of practicing large, complex exercises with multiple...
conference paper 2000
document
TNO Technische Menskunde (author), de Vries, S.C. (author), Padmos, P. (author)
In the simulator experiment reported here we examined several parameters influencing the performance of the operator of a (simulated) Unmanned Aerial Vehicle (UAV). This operator was fitted with an HMD which showed images from the (virtual) camera onboard of the UAV. The camera was slaved to the operator's head so that the camera movements...
conference paper 1998
document
de Vries, S.C. (author), Werkhoven, P. (author), TNO Technische Menskunde (author)
In many laboratory setups and in many day-to-day situations, a unique solution of the structure-from-two-views problem is unobtainable. Yet, when the visual system is presented with two projections in a sequence, it nevertheless appears to generate a reasonably stable percept of structure. In the research reported here, we examined whether the...
article 1995
Searched for: author%3A%22de+Vries%2C+S.C.%22
(1 - 14 of 14)