Searched for: subject%3A%22Global%255C%2Bpositioning%255C%2Bsystem%22
(1 - 19 of 19)
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de Kluizenaar, Y. (author), Kuijpers, E. (author), Eekhout, I. (author), Voogt, M. (author), Vermeulen, R.C.H. (author), Hoek, G. (author), Sterkenburg, R.P. (author), Pierik, F.H. (author), Duyzer, J.H. (author), Meijer, E.W. (author), Pronk, A. (author)
Particulate matter exposure may cause adverse health effects. Although ultrafine particulate matter (UFP) is hypothesised to be particularly health relevant, the number of studies into personal UFP exposure is limited. Aim To increase insight where and when most UFP exposure occurs, in terms of exposure levels and peaks in microenvironments,...
article 2017
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Zonta, A. (author), Smit, S.K. (author), Haasdijk, E. (author)
conference paper 2017
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Deziel, N.C. (author), Nuckols, J.R. (author), Jones, R.R. (author), Graubard, B.I. (author), de Roos, A.J. (author), Pronk, A. (author), Gourley, C. (author), Colt, J.S. (author), Ward, M.H. (author)
Proximity to facilities emitting polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) has been associated with increased risk of non-Hodgkin lymphoma (NHL). There is limited information about whether proximity to industrial sources leads to indoor PCDD/F contamination of homes. We measured carpet dust concentrations (pg/g...
article 2017
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Jansen, F.M. (author), Ettema, D.F. (author), Kamphuis, C.B.M. (author), Pierik, F.H. (author), Dijst, M.J. (author)
Natural environments (NE) are promoted as places that support physical activity (PA), but evidence on PA distribution across various types and sizes of NE is lacking. Accelerometers and GPS-devices measured PA of Dutch general population adults aged 45–65 years (N=279). Five NE types were distinguished: ‘parks’, ‘recreational area’, ...
article 2017
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Jansen, M. (author), Ettema, D. (author), Pierik, F. (author), Dijst, M. (author)
Physical activity (PA) is influenced by the built environment. However, little is known about the types of built environment where adults spend their time, and at what levels of PA they engage in those environments. Understanding the effect of the built environment on PA requires insight into PA behavior at different types of locations (e.g.,...
article 2016
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Helbich, M. (author), Emmichoven, M.J.Z.V. (author), Dijst, M.J. (author), Kwan, M.P. (author), Pierik, F.H. (author), Vries, S.I.D. (author)
Physical inactivity among children is on the rise. Active transport to school (ATS), namely walking and cycling there, adds to children's activity level. Little is known about how exposures along actual routes influence children's transport behavior. This study examined how natural and built environments influence mode choice among Dutch...
article 2016
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Dessing, D. (author), de Vries, S.I. (author), Hegeman, G. (author), Verhagen, E. (author), van Mechelen, W. (author), Pierik, F.H. (author)
Background: The purpose of this study is to increase our understanding of environmental correlates that are associated with route choice during active transportation to school (ATS) by comparing characteristics of actual walking and cycling routes between home and school with the shortest possible route to school. Methods: Children (n = 184; 86...
article 2016
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Prins, R.G. (author), Pierik, F. (author), Etman, A. (author), Sterkenburg, R.P. (author), Kamphuis, C.B.M. (author), van Lenthe, F.J. (author)
In choosing appropriate buffer sizes to study environmental influences on physical activity, studies are hampered by insufficient insight into the distance elderly travel actively. This study aims at getting insight into the number of trips walked and cycled within various buffer sizes using GPS measures. Data were obtained from the Elderly And...
article 2014
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Dessing, D. (author), de Vries, S.I. (author), Graham, J.M.A. (author), Pierik, F.H. (author)
Background : Active transport to school is associated with higher levels of physical activity in children. Promotion of active transport has therefore gained attention as a potential target to increase children’s physical activity levels. Recent studies have recognized that the distance between home and school is an important predictor for...
article 2014
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Dessing, D. (author), Pierik, F.H. (author), Sterkenburg, R.P. (author), van Dommelen, P. (author), Maas, J. (author), de Vries, S.I. (author)
Background Children’s current physical activity levels are disturbingly low when compared to recommended levels. This may be changed by intervening in the school environment. However, at present, it is unclear to what extent schoolyard physical activity contributes towards reaching the daily physical activity guideline. The aim of this study was...
article 2013
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Fillinger, L. (author), Hunter, A.J. (author), Zampolli, M. (author), Clarijs, M.C. (author)
Divers constitute a potential threat to waterside infrastructures. Active diver detection sonars are available commercially but present some shortcomings, particularly in highly reverberant environments. This has led to research on passive sonar for diver detection. Passive detection of open-circuit UBA (underwater breathing apparatus) has been...
article 2012
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Wang, Y. (author), Mangnus, J. (author), Kostić, D. (author), Nijmeijer, H. (author), Jansen, S.T.H. (author)
New driver support systems require knowledge of the vehicle position with great accuracy and reliability. Satellite navigation (GNSS) is generally insufficiently accurate for positioning and as an alternative to using a ground station, combinations with high quality motion sensors are used in so-called Inertial Navigation Systems. However the...
conference paper 2011
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Joore, J.P. (author), TNO Industrie en Techniek (author)
In this paper a system innovation project is presented in which a sustainable future vision with a long-term perspective was developed and translated into short-term commercial innovation opportunities, which in turn can benefit the longer-term vision of society. The case described is a three-year innovation project, in which TNO worked together...
article 2008
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van Erp, J.B.F. (author), Werkhoven, P.J. (author), TNO Defensie en Veiligheid (author)
Access to navigation information rapidly becomes standard in many situations, for example through GPS receivers and collision avoidance systems in cars. However, perceiving and processing the information may result in overloading the userÆs visual sense and cognitive resources. Intuitive navigation information presentation concepts using the...
conference paper 2006
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Toet, A. (author), TNO Defensie en Veiligheid (author)
We present a method to give single band intensified nightvision imagery a natural day-time color appearance. For input, the method requires a true color RGB source image and a grayscale nightvision target image. The source and target image are both transformed into a perceptually decorrelated color space. In this color space a best matching...
article 2005
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de Theije, P.A.M. (author), TNO Defensie en Veiligheid (author)
This paper presents STARE, a sonar-data post-processing and visualisation toot developed by TNO and written in Matlab 6.5. The software takes into account all available acoustic and non-acoustic data (GPS, radar, source/receiver position, time latencies, etc.). The latter can be used to get optimal position information for the identified sonar...
conference paper 2005
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Smith, A.J.E. (author), Chesworth, J. (author), Greidanus, H. (author), TNO Defensie en Veiligheid (author)
A ship detection algorithm is developed that uses Envisat ASAR imagery in alternating polarisation mode. From airborne data it is shown that of the two co-polarisations, HH is preferred over VV because of a larger ship-to-clutter ratio. Combining the HH and HV images of alternating polarisation mode, it is found that the correlation between the...
conference paper 2005
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Lorga, J.F.M. (author), Chu, Q.P. (author), Mulder, J.A. (author), van Halsema, D. (author), TNO Defensie en Veiligheid (author)
In this paper, the authors propose to introduce and describe a newly developed precise tightly-coupled integrated navigation system. The performed experiments with the purpose of evaluating the system performance are shown. A complete description of the integrated navigation system hardware, including calibration details, and software, with...
conference paper 2005
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Lorga, J.F.M. (author), van Rossum, W.L. (author), van Halsema, D. (author), Chu, Q.P. (author), Mulder, J.A. (author)
In this paper, the authors propose to describe the development process of a navigation system, concerning Syntectic Aperture Radar (SAR) applications, starting from the motivation for the sensor selection and finalizing with the first flight-test results. Sensors selection was one of the first steps in the design. Motivations for the...
conference paper 2004
Searched for: subject%3A%22Global%255C%2Bpositioning%255C%2Bsystem%22
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