Searched for: mods_originInfo_dateIssued_s:"2008"
(1 - 18 of 18)
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Jansen, C. (author), Wennemers, A.S. (author), Vos, W.K. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author), DenV (author)
Helicopter landings are more challenging in 'brownout' conditions, in which sand and dust is stirred up by the rotary wing aircraft, obscuring visibility. Safe brownout landings require new sensor and display technologies to provide the pilot with information on helicopter motion. In this respect tactile displays are promising: The pilot can...
conference paper 2008
document
Wentink, M. (author), Grácio, B. (author), Groen, E. (author), Feenstra, P. (author), Bles, W. (author), TNO Defensie en Veiligheid (author)
conference paper 2008
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Withagen, P.J. (author), Groen, F.C.A. (author), Schutte, K. (author), TNO Defensie en Veiligheid (author)
Shadow detection is an important aspect of foreground/ background classification. Many techniques exist, most of them assuming that casting a shadow results only in a change in intensity and no change in color. In this paper we show that in most practical indoor and outdoor situations there will also be a color shift. We propose an algorithm for...
conference paper 2008
document
Jansen, C. (author), Wennemers, A. (author), Vos, W. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Helicopter landings are more challenging in ‘brownout’ conditions, in which sand and dust is stirred up by the rotary wing aircraft, obscuring visibility. Safe brownout landings require new sensor and display technologies to provide the pilot with information on helicopter motion. In this respect tactile displays are promising: The pilot can...
conference paper 2008
document
Groen, E.L. (author), Nooij, S.A.E. (author), Bos, J.E. (author), TNO Defensie en Veiligheid (author)
At TNO research is ongoing on neuro-vestibular adaptation to altered G-levels. It is well-known that during the first days in weightlessness 50-80% of all astronauts suffer from the Space Adaptation Syndrome (SAS), which involves space motion sickness, spatial disorientation and motion illusions. After return on Earth the problems re-appear, but...
conference paper 2008
document
Groen, E.L. (author), Bos, J.E. (author), TNO Defensie en Veiligheid (author)
In this study we describe a new approach to relate simulator sickness ratings with the main frequency component of the simulator motion mismatch, that is, the computed difference between the time histories of simulator motion and vehicle motion, respectively. During two driving simulator experiments in the TNO movingbase driving simulator—that...
article 2008
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Groen, E.L. (author), Jansen, C. (author), van Erp, J.B.F. (author), van Veen, H.J. (author), TNO Defensie en Veiligheid (author)
Tactile displays provide information by applying local vibrations to the user's skin. The research organization TNO has developed a tactile torso display by implementing a number of pager motors, or “tactors” into a vest, allowing for the generation of spatio-temporal patterns. TNO carries out research into the usefulness of this tactile torso...
conference paper 2008
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Groen, E.L. (author), Muis, H. (author), Kooi, F.L. (author), TNO Defensie en Veiligheid (author)
Tilting the head during rotation about an Earth-vertical axis produces cross-coupled stimulation of the semicircular canals. Without visual feedback on the actual self-motion, this leads to the so-called Coriolis illusion. We investigated the effect of the field-of-view (FOV) on the magnitude and duration of the Coriolis illusion. Fourteen...
article 2008
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Toet, A. (author), Groen, E.l. (author), Oosterbeek, M.T.J. (author), Hooge, I.T.C. (author), TNO Defensie en Veiligheid (author)
We tested the saliency of a single vibrotractile target (T) among 2 to 7 nontargets (N), presented by 8 tactors that were equally distributed over a horizontal band around the torso. Targets and nontargets had different pulse duration, but the same activation period and no onset asynchrony. T-N similarity was varied by changing the difference...
conference paper 2008
document
van Dorp, Ph. (author), Groen, F.C.A. (author), TNO Defensie en Veiligheid (author)
Radar can be an extremely useful sensing technique to observe persons. It perceives persons behind walls or at great distances and in situations where persons have no or poor visibility. Human motion modulates the radar signal which can be observed in the spectrogram of the received signal. Extraction of these movements enables the animation of...
article 2008
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Nooij, S.A.E. (author), Bos, J.E. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Adaptation to a novel gravitational state involves adaptation of vestibular mediated responses, in particular those mediated by the otolith organs. The present paper investigates whether the orientation of Listing’s plane, which is under control of otolith signals, is affected by sustained exposure to hypergravity. Subjects were exposed to four...
article 2008
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Groen, E.L. (author), Wentink, M. (author), Trujillo, M. (author), Huhne, R. (author), TNO Defensie en Veiligheid (author)
Unsuccessful recovery from unusual flight attitudes, or “airplane upset”, is considered an important factor in civil aviation accidents. It is generally recognized that there is a clear need for enhanced training of recovery procedures from unusual flight attitudes, i.e. situations where an aircraft unintentionally exceeds the parameters of the...
conference paper 2008
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Dubbelman, G. (author), van der Mark, W. (author), Groen, F.C.A. (author), TNO Defensie en Veiligheid (author)
A novel robust visual-odometry technique, called EM-SE(3) is presented and compared against using the random sample consensus (RANSAC) for ego-motion estimation. In this contribution, stereo-vision is used to generate a number of minimal-set motion hypothesis. By using EM-SE(3), which involves expectation maximization on a local linearization of...
conference paper 2008
document
Bos, J.E. (author), Bles, W. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
This paper deals with visual-vestibular interactions as these occur when viewing images, and may cause motion sickness. Some basic vestibular matters fundamental to motion sickness are highlighted, such as the observation that people without functioning inner ears do not get sick from motion, including visual motion. Furthermore, the subjective...
article 2008
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Gerritsen, G. (author), van der Hoogt, C.C. (author), Schaap, F.G. (author), Voshol, P.J. (author), Kypreos, K.E. (author), Maeda, N. (author), Groen, A.K. (author), Havekes, L.M. (author), Rensen, P.C.N. (author), van Dijk, K.W. (author), TNO Kwaliteit van Leven (author)
Apolipoprotein E2 (apoE2)-associated hyperlipidemia is characterized by a disturbed clearance of apoE2-enriched VLDL remnants. Because excess apoE2 inhibits LPL-mediated triglyceride (TG) hydrolysis in vitro, we in vestigated whether direct or indirect stimulation of LPL activity in vivo reduces the apoE2-associated hypertriglyc-eridemia. Here,...
article 2008
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Pols, T.W.H. (author), Ottenhoff, R. (author), Vos, M. (author), Levels, J.H.M. (author), Quax, P.H.A. (author), Meijers, J.C.M. (author), Pannekoek, H. (author), Groen, A.K. (author), de Vries, C.J.M. (author), TNO Kwaliteit van Leven (author)
NR4A nuclear receptors are induced in the liver upon fasting and regulate hepatic gluconeogenesis. Here, we studied the role of nuclear receptor Nur77 (NR4A1) in hepatic lipid metabolism. We generated mice expressing hepatic Nur77 using adenoviral vectors, and demonstrate that these mice exhibit a modulation of the plasma lipid profile and a...
article 2008
document
Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Dit artikel beschrijft de nieuwste resultaten van het ESA onderzoeksproject 'Motion perception' waarbij de correlatie wordt onderzocht tussen de gevoeligheid van astronauten voor Space Adaption Syndrome (SAS) en Sickness Induced by Centrifugation (SIC)
article 2008
document
Nooij, S.A.E. (author), Bos, J.E. (author), Groen, E.L. (author), TNO Defensie en Veiligheid (author)
Prolonged exposure to hypergravity in a human centrifuge can lead to post-rotary spatial disorientation and motion sickness. These symptoms are mainly provoked by tilting head movements and resemble the Space Adaptation Syndrome. We hypothesized that the occurrence of these post-rotary effects might be related to changes in the velocity storage ...
article 2008
Searched for: mods_originInfo_dateIssued_s:"2008"
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