- document
-
Bakker, K.J. (author), Blom, C.B.M. (author)According to modern design codes, such as the Eurocode 7, also Soil Retaining structures should be designed according to Ultimate Limit State analysis, see [1]. From an economic point of view, the design of the lining, i.e. the thickness and reinforcement of it, would be optimal if the loading during construction is less critical than the...journal article 2009
- document
-
Rossi, M. (author), Lindken, R. (author), Westerweel, J. (author)Multiplane ?PIV can be utilized to determine the wall shear stress and wall topology from the measured flow over a structured surface. A theoretical model was developed to predict the measurement error for the surface topography and shear stress, based on a theoretical analysis of the precision in PIV measurements. The main parameters that...journal article 2009
- document
-
Kuipers, F.A. (author), Beshir, A.A. (author), Orda, A. (author), Van Mieghem, P.F.A. (author)Physical impairments, such as noise and signal distortions, negatively affect the quality of information transport in optical networks. The effect of physical impairments augments with distance and bit rate of the signal to the point that it becomes detrimental to the information transfer. To reverse the effect of physical impairments, the...report 2009
- document
-
Maassen, R. (author), Lee, R. (author), Van Zundert, A. (author), Cooper, R. (author)This report describes the anesthetic management of an obese patient with a difficult airway and the merits of videolaryngoscopy, specifically in terms of the reduced risk of dental damage during intubation. A 49-year-old woman (body mass index; BMI, 36 kg·m?2), was scheduled to undergo an elective laparoscopic cholecystectomy because of...journal article 2009
- document
-
Gora, L. (author), Kuhn, J. (author), Baimpos, T. (author), Nikolakis, V. (author), Kapteijn, F. (author), Serwicka, E.M. (author)This report presents the development of new selective gas sensors utilizing a b-oriented silicalite-1 layer–magneto-elastic ribbon assembly. The key principle for the operation of these sensors is monitoring the changes in the resonance frequency of the Metglas® strip in relation to the concentration of a component in the gas phase. This...journal article 2009
- document
-
Eivani, A.R. (author), Ahmed, H. (author), Zhou, J. (author), Duszczyk, J. (author)This research concerns the effect of homogenization treatment on the electrical resistivity of AA7020 aluminum alloy variants with different Zr and Cr contents. Small changes in the Zr and Cr contents of the as-cast alloy increase the electrical resistivity significantly. After employing various homogenization treatments, the electrical...journal article 2009
- document
-
With, C. (author), Metrikine, A.V. (author), Bodare, A. (author)As the demand for predictions of train-induced vibrations is increasing, it is essential that adequate parameters of the railway structure are given as input in the predictions. Gathering this information can be quite time-consuming and costly, especially when predictions are required for the low-frequency emission. This article presents a...journal article 2009
- document
-
Bucksch, A. (author), Lindenbergh, R. (author), Mementi, M. (author), Raman, M.Z. (author)New airborne LiDAR (Light Detection and Ranging) measurement systems, like the FLI-MAP 400 System, make it possible to obtain high density data containing far more information about single objects, like trees, than traditional airborne laser systems. Therefore, it becomes feasible to analyze geometric properties of trees on the individual object...conference paper 2009
- document
-
Dawes, G.J.S. (author), Fratila-Apachitei, L.E. (author), Necula, B.S. (author), Apachitei, I. (author), Witkamp, G.J. (author), Duszczyk, J. (author)The aim of the present study was to investigate the morphology and function of a drug eluting metallic porous surface produced by the immobilization of poly lactide-co-glycolide microspheres bearing dexamethasone onto plasma electrolytically oxidized Ti–6Al–7Nb medical alloy. Spheres of 20 µm diameter were produced by an oilin-water emulsion...journal article 2009
- document
-
Qureshi, J.H. (author), Pelk, M.J. (author), Marchetti, M. (author), Neo, W.C.E. (author), Gajadharsing, J.R. (author), Van der Heijden, M.P. (author), De Vreede, L.C.N. (author)A 90-W peak-power 2.14-GHz improved GaN outphasing amplifier with 50.5% average efficiency for wideband code division multiple access (W-CDMA) signals is presented. Independent control of the branch amplifiers by two in-phase/quadrature modulators enables optimum outphasing and input power leveling, yielding significant improvements in gain,...journal article 2009
- document
-
Korthals Altes, W.K. (author), Tambach, M. (author)Promoting mixed-use development is part of policies aimed at enhancing urban quality. Until recently, however, industry and housing have rarely been found together in the same development as there is a long tradition of keeping these functions separate. As part of a compact-city policy, Dutch local authorities are in the process of introducing...journal article 2009
- document
-
Knab, J.R. (author), Adam, A.J.L. (author), Nagel, M. (author), Shaner, E. (author), Seo, M.A. (author), Kim, D.S. (author), Planken, P.C.M. (author)We present measurements of the complete terahertz (THz) electric near-field distribution, Ex, Ey and Ez, in both the time- and frequency-domains, for subwavelength apertures and subsections of subwavelength aperture arrays. Measuring the individual components of the THz near-field with subwavelength spatial resolution, as they emerge from these...journal article 2009
- document
-
Khan, S. (author), Sabanovic, A. (author), Nergiz, A.O. (author)In this paper, the design of a discrete-time sliding-mode controller based on Lyapunov theory is presented along with a robust disturbance observer and is applied to a piezostage for high-precision motion. A linear model of a piezostage was used with nominal parameters to compensate the disturbance acting on the system in order to achieve...journal article 2009
- document
-
Krumpel, A.H. (author), Bos, A.J.J. (author), Bessière, A. (author), Van der Kolk, E. (author), Dorenbos, P. (author)A detailed and systematic electron trapping study was conducted in the scientifically important wide band-gap materials LuPO4 and YPO4 doubly doped with Ce3+ and Ln3+ (Ln=Sm, Dy, Ho, Er, Tm). By using vacuum-ultraviolet luminescence spectroscopy and detailed thermoluminescence spectroscopy it was possible to establish by two independent methods...journal article 2009
- document
-
Ali, S. (author), Uijttewaal, W.S.J. (author)The Objective of this study is to estimate the form drag due to vegetated weir- like obstacles. Head loss due to submerged vegetated dikes and groins has been modeled by expansion loss form drag model (Energy and momentum balance principles) and it has been compared with experimental data. An experimental study has been carried out on a scaled...conference paper 2009
- document
-
Blanckaert, K.J.F. (author), McLelland, S.J. (author)Simultaneous velocity measurements were taken using Particle Image Velocimetry (PIV) and an Acoustic Doppler Velocity Profiler (ADVP) in a sharp open-channel bend with an immobile gravel bed. The PIV measures 3D velocity vectors in a vertical plane (~40cm x 20cm) at a frequency of 7.5 Hz, whereas the ADVP measures 3D velocity vectors in a...conference paper 2009
- document
-
Kester, L. (author), Griffin, A. (author), Hultink, E.J. (author), Lauche, K. (author)We develop a general model of how new product development portfolio decisions are made based on four diverse case studies. Previous research has investigated portfolio decisions as individually discrete decisions. We find that portfolio decision-making has to be considered as an integrated system of domain-based processes that produce evidence-,...conference paper 2009
- document
-
Van den Hof, P.M.J. (author), Jansen, J.D. (author), Van Essen, G.M. (author), Bosgra, O.H. (author)Due to urgent needs to increase efficiency in oil recovery from subsurface reservoirs new technology is developed that allows more detailed sensing and actuation of multiphase flow properties in oil reservoirs. One of the examples is the controlled injection of water through injection wells with the purpose to displace the oil in an appropriate...conference paper 2009
- document
-
Bayerl, P.S. (author), Lauche, K. (author)In this field study on distributed teams we examined the impact of communication media on attitudes towards empowerment and integration of remote subgroups. Using Q-methodology, interviews and questionnaires we compared attitudes of team members and managers in low and high media-rich environments. Our results indicate that use of richer media...conference paper 2009
- document
-
Harinck, J. (author), Guardone, A. (author), Colonna, P. (author)This paper presents an investigation about the effect of the complexity of a fluid molecule on the fluid dynamic quantities sound speed, velocity, and Mach number in isentropic expansions. Ideal-gas and dense-gas expansions are analyzed, using the polytropic ideal gas and Van der Waals thermodynamic models to compute the properties of the fluid....journal article 2009