Searched for: +
(1 - 20 of 104)

Pages

document
Trieschnigg, D. (author), Hiemstra, D. (author), de Jong, F. (author), Kraaij, W. (author), TNO Informatie- en communicatietechnologie (author)
An important challenge for biomedical information retrieval (IR) is dealing with the complex, inconsistent and ambiguous biomedical terminology. Frequently, a concept-based representation defined in terms of a domain-specific terminological resource is employed to deal with this challenge. In this paper, we approach the incorporation of a...
conference paper 2010
document
Ainslie, M.A. (author), de Jong, C.A.F. (author), Robinson, S.P. (author), Lepper, P.A. (author)
To meet the growing demand for carbon-free energy sources, the EU has ambitious plans to increase its capacity for generation of offshore wind power. The UK and Netherlands, for example, plan to increase their offshore power generating capacity, respectively, to 33 and 6 gigawatts by the year 2020. Assuming that this power is generated entirely...
conference paper 2010
document
TNO Defensie en Veiligheid (author), Alić, L. (author), Haeck, J.C. (author), Klein, S. (author), Bol, K. (author), van Tiel, S.T. (author), Wielopolski, P.A. (author), Bijster, M. (author), Niessen, W.J. (author), Bernsen, M. (author), Veenland, J.F. (author), de Jong, M. (author)
Spatial correspondence between histology and multi sequence MRI can provide information about the capabilities of non-invasive imaging to characterize cancerous tissue. However, shrinkage and deformation occurring during the excision of the tumor and the histological processing complicate the co registration of MR images with histological...
conference paper 2010
document
van Neer, P.L.M.J. (author), Danilouchkine, M.G. (author), Matte, G.M. (author), van der Steen, A.F.W. (author), de Jong, N. (author)
Tissue second-harmonic imaging is currently the default mode in commercial diagnostic ultrasound systems. A new modality, superharmonic imaging (SHI), combines the third through fifth harmonics originating from nonlinear wave propagation through tissue. SHI could further improve the resolution and quality of echographic images. The...
article 2011
document
Kastelein, R.A. (author), Steen, N. (author), de Jong, C.A.F. (author), Wensveen, P.J. (author), Verboom, W.C. (author)
Naval sonar systems produce signals which may affect the behavior of harbor porpoises, though their effect may be reduced by ambient noise. To show how natural ambient noise influences the effect of sonar sweeps on porpoises, a porpoise in a pool was exposed to 1-s duration up-sweeps, similar in frequency range (6-7 kHz) to those of existing...
article 2011
document
de Wit, J.J.M. (author), van Rossum, W.L. (author), de Jong, A.J. (author)
Multiple input/multiple output (MIMO) radar system performance benefits from the capability to simultaneously transmit and receive multiple orthogonal waveforms. For pulse radars fitting orthogonal waveforms have been developed. These waveforms are however not necessarily suitable for frequencymodulated continuous-wave (FMCW) radar. The major...
conference paper 2011
document
de Jong, A.N. (author), van Eijk, A.M.J. (author), Benoist, K.W. (author), Gunter, W.H. (author), Vrahimis, G. (author), October, F.J. (author)
Knowledge on the marine boundary layer is of importance for the prediction of the optical image quality obtained from long range targets. One property of the boundary layer, that can be studied rather easily by means of optical refraction measurements, is the vertical temperature profile. This profile can be compared with the profile, as...
conference paper 2011
document
van Neer, P.M.L.J. (author), Vos, H.J. (author), de Jong, N. (author)
v
article 2011
document
de Jong, A.N. (author)
Measurements taken through the year in False Bay, South Africa, are helping to validate models of sensor performance for a range of practical applications
article 2011
document
de Jong, P. (author), van Dijk, W. (author), de Rooij, M. (author)
The composition of 23 concrete mixtures was varied in five separate series to evaluate the influence of porosity on the <sup>222</sup>Rn exhalation rate. In each series, a range in porosities is obtained by varying (1) the amount of cement, (2) type of cement (Portland or blast furnace slag cement), (3) the amount of water at a fixed cement...
article 2011
document
Matte, G.M. (author), van Neer, P.M.L.J. (author), Danilouchkine, M.G. (author), Huijssen, J. (author), Verweij, M. (author), de Jong, N. (author)
Abstract—Second-harmonic imaging is currently one of the standards in commercial echographic systems for diagnosis, because of its high spatial resolution and low sensitivity to clutter and near-field artifacts. The use of nonlinear phenomena mirrors is a great set of solutions to improve echographic image resolution. To further enhance the...
article 2011
document
Vos, H.J. (author), Goertz, D.E. (author), van der Steen, A.F.W. (author), de Jong, N. (author)
This study investigates the use of an acoustic parametric array as a means for microbubble excitation. The excitation wave is generated during propagation in a nonlinear medium of two high-frequency carrier waves, whereby the frequency of the excitation wave is the difference frequency of the carrier waves. Carrier waves of around 10 and 25 MHz...
article 2011
document
Kastelein, R.A. (author), Wensveen, P.J. (author), Terhune, J.M. (author), de Jong, C.A.F. (author)
Equal-loudness functions describe relationships between the frequencies of sounds and their perceived loudness. This pilot study investigated the possibility of deriving equal-loudness contours based on the assumption that sounds of equal perceived loudness elicit equal reaction times (RTs). During a psychoacoustic underwater hearing study, the...
article 2011
document
de Jong, A.N. (author), van Eijk, A.M.J. (author), Cohen, L.H. (author), Fritz, P.J. (author), Gunter, W.H. (author), Vrahimisb, G. (author), Faith, J. (author)
The FATMOSE trial (False Bay Atmospheric Experiment) is a continuation of the cooperative work between TNO and IMT on atmospheric propagation and point target detection and identification in a maritime environment (South Africa). The atmospheric transmission, being of major importance for target detection, was measured with the MSRT multiband...
conference paper 2011
document
van der Werff, L. (author), Kraaij, W. (author), de Jong, F. (author)
conference paper 2011
document
Kastelein, R.A. (author), Hoek, L. (author), de Jong, C.A.F. (author)
The distance at which active naval sonar signals can be heard by harbor porpoises depends, among other factors, on the hearing thresholds of the species for those signals. Therefore the hearing sensitivity of a harbor porpoise was determined for 1 s up-sweep and down-sweep signals, mimicking mid-frequency and low-frequency active sonar sweeps ...
article 2011
document
de Jong, J. (author)
article 2011
document
Ainslie, M.A. (author), de Jong, C.A.F. (author)
Early human interest in ambient noise in the sea, especially during and after the Second World War, resulted from its effect on limiting the performance of military search sonar [Urick 1983]. While that interest continues, it is now accompanied by non-military uses of underwater sound, such as navigation, fisheries, oceanography and seismic...
conference paper 2011
document
van Neer, P.L.M.J. (author), Danilouchkine, M.G. (author), Verweij, M.D. (author), Demi, L. (author), Voormolen, M.M. (author), van der Steen, A.F.W. (author), de Jong, N. (author)
In medical ultrasound, fundamental imaging (FI) uses the reflected echoes from the same spectral band as that of the emitted pulse. The transmission frequency determines the trade-off between penetration depth and spatial resolution. Tissue harmonic imaging (THI) employs the second harmonic of the emitted frequency band to construct images....
article 2011
document
Kastelein, R. (author), Gransier, R. (author), van Mierlo, R. (author), Hoek, L. (author), de Jong, C.A.F. (author)
To set safety criteria for levels of sounds produced during pile driving for offshore wind parks, temporary hearing threshold shifts sTTSsd were studied in a harbor porpoise and two harbor seals. A psychoacoustic behavioral technique was used to quantify TTS and hearing recovery in the animals exposed to underwater sounds swhite noise in a 1/1...
article 2011
Searched for: +
(1 - 20 of 104)

Pages