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De Breuker, R. (author), Abdalla, M. (author), Gürdal, Z. (author), Lindner, D. (author)Aircraft are often confronted with distinct circumstances during different parts of their mission. Ideally the aircraft should fly optimally in terms of aerodynamic performance and other criteria in each one of these mission requirements. This requires in principle as many different aircraft configurations as there are flight conditions, so...conference paper 2007
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Donnell, K.O. (author), Schober, S. (author), Stolk, M. (author), Marzocca, P. (author), De Breuker, R. (author), Abdalla, M. (author), Nicolini, E. (author), Gürdal, Z. (author)This paper discusses modeling, simulations and experimental aspects of active aeroelastic control on aircraft wings by using Synthetic Jet Actuators (SJAs). SJAs, a particular class of zero-net mass-flux actuators, have shown very promising results in numerous aeronautical applications, such as boundary layer control and delay of flow separation...conference paper 2007
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Melkert, J. (author), Van Wee, B. (author)Since the year 2000 the Netherlands are using a new guideline for assessing the costs and benefits of transport systems. This guideline has been used several times now to assess transport systems using existing transport modes like trains. This paper reports on the first time this guideline was used to assess an innovative transport concept, the...conference paper 2007
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Negenborn, R.R. (author), De Schutter, B. (author), Hellendoorn, J. (author)We discuss an extension of a scheme recently proposed for multi-agent control of large-scale networks, like power networks, road traffic networks, water networks, etc. The original scheme uses serial sequences of agent interactions that under some assumptions make agents locally choose actions that are globally optimal. However, some weaknesses...conference paper 2007
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Langelaar, M. (author), Van Keulen, F. (author)This article illustrates the opportunities that combining computational modeling and systematic design optimization techniques offer to facilitate the design process of shape memory alloy (SMA) structures. Focus is on shape memory behavior due to the R-phase transformation in Ni-Ti, for which a dedicated constitutive model is formulated. In this...conference paper 2007
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Barrett, R. (author), Vos, R. (author), De Breuker, R. (author)This paper describes a new class of flight control actuators using Post-Buckled Precompressed (PBP) piezoelectric elements to provide much improved actuator performance. These PBP actuator elements are modeled using basic large deflection Euler-beam estimations accounting for laminated plate effects. The deflection estimations are then coupled...conference paper 2007
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Grigorescu, A.E. (author), Van der Krogt, M. (author), Hagen, C.W. (author)Isolated dots and lines with 6 nm width were written in 20 nm thick Hydrogen silsesquioxane (HSQ) layers on silicon substrates, using 100 keV electron beam lithography. The main factors that might limit the resolution, i.e. beam size, writing strategy, resist material, electron dose, development process, are discussed. We demonstrate that, by...conference paper 2007
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Blaas, J. (author), Botha, C.P. (author), Majoie, C. (author), Nederveen, A. (author), Vos, F.M. (author), Post, F.H. (author)The surgical removal of brain tumors can lead to functional impairment. Therefore it is crucial to minimize the damage to important functional areas during surgery. These areas can be mapped before surgery by using functional MRI. However, functional impairment is not only caused by damage to these areas themselves. It is also caused by damage...conference paper 2007
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Kok, P. (author), Dijkstra, J. (author), Botha, C.P. (author), Post, F.H. (author), Kaijzel, E. (author), Que, I. (author), Löwik, C.W.G.M. (author), Reiber, J.H.C. (author), Lelieveldt, B.P.F. (author)This paper explores new methods to visualize and fuse multi-2D bioluminescence imaging (BLI) data with structural imaging modalities such as micro CT and MR. A geometric, back-projection-based 3D reconstruction for superficial lesions from multi-2D BLI data is presented, enabling a coarse estimate of the 3D source envelopes from the multi-2D BLI...conference paper 2007
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Lambooij, M.T.M. (author), IJsselsteijn, W. (author), Heynderickx, I. (author)Visual discomfort has been the subject of considerable research in relation to stereoscopic and autostereoscopic displays, but remains an ambiguous concept used to denote a variety of subjective symptoms potentially related to different underlying processes. In this paper we clarify the importance of various causes and aspects of visual comfort....conference paper 2007
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Dias, P. (author), Pimentel, A. (author), Ferreira, C. (author), Van Huussen, F. (author), Baggerman, J.W. (author), Van der Horst, P. (author), Madeira, J. (author), Bidarra, R. (author), Sousa Santos, B. (author)Virtual and Augmented Reality are developing rapidly: there is a multitude of environments and experiments in several laboratories using from simple HMD (Head-Mounted Display) visualization to more complex and expensive 6-wall projection CAVEs, and other systems. Still, there is not yet a clear emerging technology in this area, nor commercial...conference paper 2007
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De Koning, T.C.M. (author), Veldhoven, P. (author), Knoche, H. (author), Kooij, R.E. (author)In this paper we explore the relation between subjective and objective measures of video quality. We computed objective MOS values from video clips using the video quality measuring tool VQM and compared it to the clips’ subjective Acceptability scores. Using the ITU defined mapping (M2G) from MOS to binary Good or Better (GoB) values, we...conference paper 2007
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Iancu, D. (author), Ye, H. (author), Senthilvelan, M. (author), Kotlyar, V. (author), Glossner, J. (author), Moudgill, M. (author), Agrawal, S. (author), Jinturkar, S. (author), Iancu, A. (author), Ramadurai, V. (author)This paper describes a device capable of performing the following tasks: it samples and decodes the composite video analog TV signal, it encodes the resulting RGB data into a MPEG-4 stream and sends it over a WiMAX link. On the other end of the link a similar device receives the WiMAX signal, in either TDD or FDD mode, decodes the MPEG data and...conference paper 2007
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Kasalynas, I. (author), Adam, A.J.L. (author), Klaassen, T.O. (author), Hovenier, N.J. (author), Panraud, G. (author), Iordanov, V.P. (author), Sarro, P.M. (author)Detection peculiarities of an un-cooled (room temperature) 8×8 pixel array designed to image broadband THz radiation were investigated. Each pixel consists of a thin conductive film absorber on a dielectric membrane with thermopile temperature readout. It was designed and tested for four combinations of two different types of absorber and...conference paper 2007
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Hagen, G.M. (author), Caarls, W. (author), Thomas, M. (author), Hill, A. (author), Lidke, K.A. (author), Rieger, B. (author), Fritsch, C. (author), Van Geest, B. (author), Jovin, T.M. (author), Arndt-Jovin, D.J. (author)We report on a new generation, commercial prototype of a programmable array optical sectioning fluorescence microscope (PAM) for rapid, light efficient 3D imaging of living specimens. The stand-alone module, including light source(s) and detector(s), features an innovative optical design and a ferroelectric liquid-crystal-on-silicon (LCoS)...conference paper 2007
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Dietrich, H.R.C. (author), Vermolen, B.J. (author), Rieger, B. (author), Young, I.T. (author), Garini, Y. (author)Single-molecule techniques continue to gain in popularity in research disciplines such as the study of intermolecular interactions. These techniques provide information that otherwise would be lost by using bulk measurements that deal with a large number of molecules. We describe in this report the motion of tethered DNA molecules that have been...conference paper 2007
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Van der Kolk, E. (author), Dorenbos, P. (author)A model is presented that successfully predicts electro-optical properties of Lanthanide materials, irrespective whether these materials are inorganic or organic, diluted or concentrated, metallic, semi-conducting or insulating. The model is firmly based on recent experimental data revealing that the variation in 4f and 5d energies relative to...conference paper 2007
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Dorenbos, P. (author), Van der Kolk, E. (author)A method that has proven succesful in locating the energy levels of divalent and trivalent lanthanide ions (Ce, Pr,..., Eu,...Yb, Lu) in wide band gap inorganic compounds like YPO4 and CaF2 is applied to locate lanthanide levels in the wideband semiconductors GaN, AlN, their solid solutions AlxGa1-xN, and ZnO. The proposed schemes provide a...conference paper 2007
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Verhagen, H.J. (author), Visser, P.J. (author)Along the North Sea coast, water levels are rising and waves are intensifying due to climate change. The best scientific evidence suggests that both phenomena are likely to accelerate over the coming decades. In some North Sea coastal areas also land is sinking and tidal heights and rates of erosion are increasing. This means that the risk of...conference paper 2007
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Bernini, R. (author), De Nuccio, E. (author), Minardo, A. (author), Zeni, L. (author), Sarro, P.M. (author)In this work we show that integrated silicon hollow core AntiResonant Reflecting Optical Waveguide (ARROW) can be used as a basic tool for the realization of optical sensors. ARROW waveguides, with hollow core, permit to confine the light in a low refractive index liquid core, by means of two cladding layers designed to form a high reflectivity...conference paper 2007