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Koldijk, S.J. (author)
We live in an information society, in which effective and efficient interaction with information is crucial. Many people are knowledge workers, whose main job it is to interpret and generate information. Due to their typical working conditions these people often experience stress while working with information [1]. They get overwhelmed by all...
conference paper 2012
document
Jellema, W. (author), Kruizinga, B. (author), Visser, H. (author), van den Dool, T.C. (author), Santos, C.P. (author), Redondo, J.T. (author), Eggens, M. (author), Ferlet, M. (author), Swinyard, B. (author), Dohlen, K. (author), Griffin, D. (author), Fernandez, L.M.G. (author), Belenguer, T. (author), Matsuhara, H. (author), Kawada, M. (author), Doi, Y. (author)
The Safari instrument on the Japanese SPICA mission is a zodiacal background limited imaging spectrometer offering a photometric imaging (R ≈ 2), and a low (R = 100) and medium spectral resolution (R = 2000 at 100 μm) spectroscopy mode in three photometric bands covering the 34-210 μm wavelength range. The instrument utilizes Nyquist sampled...
conference paper 2012
document
Henselmans, R. (author), Nijkerk, M.D. (author), Lemmen, M.H.J. (author), Rijnveld, N. (author), Kamphues, F.G. (author)
TNO has developed the Optical Tube Assemblies (OTAs) for the ESO VLT Four Laser Guide Star Facility. The OTAs are Galilean 20x beam expanders, expanding a ∅15 mm input beam (25W, 589 nm CW) to a steerable ∅300 mm output beam. TNO has recently successfully completed acceptance testing of the four units, showing compliance to the challenging...
conference paper 2012
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Andrei, R.M. (author), Smith, C.S. (author), Fraanje, P.R. (author), Verhaegen, M. (author), Korkiakoski, V.A. (author), Keller, C.U. (author), Doelman, N.J. (author)
In this paper we give a new wavefront estimation technique that overcomes the main disadvantages of the phase diversity (PD) algorithms, namely the large computational complexity and the fact that the solutions can get stuck in a local minima. Our approach gives a good starting point for an iterative algorithm based on solving a linear system,...
conference paper 2012
document
Keller, C.U. (author), Korkiakoski, V. (author), Doelman, N.J. (author), Fraanje, P.R. (author), Andrei, R. (author), Verhaegen, M. (author)
We present a promising approach to the extremely fast sensing and correction of small wavefront errors in adaptive optics systems. As our algorithm's computational complexity is roughly proportional to the number of actuators, it is particularly suitable to systems with 10,000 to 100,000 actuators. Our approach is based on sequential phase...
conference paper 2012
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Folmer, E.J.A. (author), Wu, H. (author)
Semantic standards should play an important role in achieving inter-organizational interoperability. Millions are spent on development and adoption of these standards, but does it lead to interoperability? This important question is not often addressed. In this study interoperability in the Dutch temporary staffing industry is studied by...
conference paper 2012
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Lira-Cantu, M. (author), Tanenbaum, D.M. (author), Norrman, K. (author), Voroshazi, E. (author), Hermenau, M. (author), Lloyd, M.T. (author), Teran-Escobar, G. (author), Galagan, Y.O. (author), Zimmermann, B. (author), Hösel, M. (author), Dam, H.F. (author), Jørgensen, M. (author), Gevorgyan, S. (author), Lutsen, L. (author), Vanderzande, D. (author), Hoppe, H. (author), Rösch, R. (author), Würfel, U. (author), Andriessen, H.A.J.M. (author), Rivaton, A. (author), Uzunoglu, G.Y. (author), Germack, D. (author), Andreasen, B. (author), Madsen, M.V. (author), Bundgaard, E. (author), Krebs, F.C. (author)
This work is part of the inter-laboratory collaboration to study the stability of seven distinct sets of state-of-the-art organic photovoltaic (OPVs) devices prepared by leading research laboratories. All devices have been shipped to and degraded at the Danish Technical University (DTU, formerly RISO-DTU) up to 1830 hours in accordance with...
conference paper 2012
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Hoogstrate, A.M. (author), van Drunen, C. (author), van Venrooy, B.W.H. (author), Henselmans, R. (author)
Aspherical and freeform optical elements have a large potential in reducing optical aberrations and to reduce the number of elements in complex high performance optical systems. However, manufacturing a single piece or a small series of aspherical and freeform optics has for long been limited by the lack of flexible metrology tools. With the...
conference paper 2012
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ter Horst, R. (author), de Haan, M. (author), Gubbels, G.P.H. (author), Senden, R. (author), van Venrooy, B.W.H. (author), Hoogstrate, A.M. (author)
For years now conventional aluminium 6061 T6 has widely been used for mirrors in astronomical instruments, being diamond turned or since a few years also being optically polished. This allows the development of optical systems that can be tested and operated at any temperature, without being affected by CTE effects. Using traditional aluminium...
conference paper 2012
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Verlaan, A.L. (author), Hogenhuis, H. (author), Pijnenburg, J.A.C.M. (author), Lemmen, M.H.J. (author), Lucarelli, S. (author), Scheulen, D. (author), Ende, D. (author)
The LISA Optical Stability Characterization project is part of the LISA CTP activities to achieve the required Technonlogy Readiness Level (TRL) for all of the LISA technologies used. This activity aims demonstration of the Telescope Assembly (TA), with a structure based on CFRP technology, that a CTE of 10 -7 1/K can be achieved with measures...
conference paper 2012
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Pijnenburg, J.A.C.M. (author), Rijnveld, N. (author), Hogenhuis, H. (author)
Detection and observation of gravitational waves requires extreme stability in the frequency range 3e-5 Hz to 1 Hz. NGO/LISA will attain this by creating a giant interferometer in space, based on free floating proof masses in three spacecrafts. To operate NGO/LISA, the following piezo mechanisms are developed: 1. A piezo stack mechanism (Point...
conference paper 2012
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de Vreugd, J. (author), te Voert, M.J.A. (author), Nijenhuis, J.R. (author), Pijnenburg, J.A.C.M. (author), Tabak, E. (author)
Adhesives are widely used in optomechanical structures for bonding optical components to their mounts. The main advantage of using adhesives is the excellent strength to weight ratio. Adhesive bonding is seen as a desirable joining technique as it allows for greater flexibility in design. A disadvantage of adhesives however is the limited...
conference paper 2012
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Meisner, J.A. (author), Jaffe, W.J. (author), le Poole, R.S. (author)
The NOVA Fringe Tracker (NFT) is a proposed solution tóthe call by ESO for a second generation fringe tracking facility. This instrument at the VLTI will enable the cophasing of up tó6 telescopes simultaneously. Using broad band optics with detection from 1.2 tó2.4 microns, a unique configuration is employed that eliminates so-called ...
conference paper 2012
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van Deelen, J. (author), Illiberi, A. (author), Hovestad, A. (author), Barbu, I. (author), Klerk, L. (author), Buskens, P.J.P. (author)
An overview of different transparent conductors is given. In addition, atmospheric pressure CVD of ZnO resulted in conductivities below 1 mΩ cm for a temperature of 480°C, whereas at a process temperature of 200°C a value of 2 mΩ cm was obtained. Also atmospheric pressure spatial ALD was used to make conductive ZnO. Furthermore, the properties...
conference paper 2012
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Brandt, P. (author), Basten, T. (author), Stuijk, S. (author), Bui, V. (author), de Clercq, P. (author), Ferreira Pires, L. (author), van Sinderen, M. (author)
Much effort has been spent on the optimization of sensor networks, mainly concerning their performance and power efficiency. Furthermore, open communication protocols for the exchange of sensor data have been developed and widely adopted, making sensor data widely available for software applications. However, less attention has been given to the...
conference paper 2013
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TNO Informatie- en Communicatietechnologie (author), Schuemie, M. (author), Trieschnigg, D. (author), Kraaij, W. (author)
This workshop report discusses the collaborative work of UT, EMC and TNO on the TREC Genomics Track 2007. The biomedical information retrieval task is approached using cross language methods, in which biomedical concept detection is combined with effective IR based on unigram language models. Furthermore, a co-occurrence method is used to select...
conference paper 2007
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TNO Informatie- en Communicatietechnologie (author), Trieschnigg, D. (author), Kraaij, W. (author), Schuemie, M. (author)
The 2006 TREC Genomics evaluation focuses on document, passage and aspect retrieval in the genomics domain. The Erasmus Medical Center, TNO and University of Twente collaborated on an approach combining concept tagging (named entity recognition) and information retrieval based on statistical language models. Experiments on the 2004 collection...
conference paper 2006
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de Jong, A.N. (author), Schwering, P.B.W. (author), Gunter, W.H. (author), Vrahimis, G. (author), October, F.J. (author)
The knowledge on scintillation, caused by atmospheric turbulence, is of vital importance for the performance prediction of threat detection systems and for the development of associated detection algorithms. Additionally, scintillation data may support the knowledge on turbulence characteristics. Along these ideas, data have been analysed,...
conference paper 2012
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van den Broek, T.A. (author), Koers, W. (author), Langley D.J., (author)
Numerous examples have shown that mass participation in online anti-branding communities can affect marketing managers’ decisions by forcing firms to change their behaviour. Prior research has shown that incorrect responses can worsen reputational damage. This paper presents a new method to train and research marketing managers’ behaviour with...
conference paper 2013
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Laurent, N. (author), Lejard, C. (author), Deltel, G. (author), Bijl, P. (author)
Night vision equipment is crucial in order to accomplish supremacy and safety of the troops on the battlefield. Evidently, system integrators, MODs and end-users need access to reliable quantitative characterization of the expected field performance when using night vision equipment. The Image Intensifier tube is one of the most important...
conference paper 2013
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