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Zwart, S.J. (author), Leclert, L.M.C. (author)
The irrigation performance of the Office du Niger in Mali, a large-scale rice-based irrigation scheme, was analysed with the use of remote sensing technology. The major advantage of remote sensing derived data over field measured data is that it provides system-wide, spatially distributed and objective information. Four irrigation performance...
journal article 2009
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Klapwijk, R. (author), Rommes, E. (author)
In this paper, a new perspective is developed to promote a positive relationship between young people and technology. An in-depth study of the values young Dutch secondary school students feel are essential in their future profession was made. Following organisational psychologist Edgar Schein, we distinguish career anchors, each with their own...
journal article 2009
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Kenjeres, S. (author)
We conducted a large eddy simulation (LES) of a locally applied electromagnetic control of turbulent thermal convection of an electrically conductive fluid (electrolyte solution) inside of a slender enclosure. Generic configurations, consisting of two or three magnets of opposite polarities located below the lower wall, and two oppositely...
journal article 2009
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Poelma, C. (author), Mari, J.M. (author), Foin, N. (author), Tang, M.X. (author), Krams, R. (author), Caro, C.G. (author), Weinberg, P.D. (author), Westerweel, J. (author)
Ultrasound particle image velocimetry (PIV) can be used to obtain velocity fields in non-transparent geometries and/or fluids. In the current study, we use this technique to document the flow in a curved tube, using ultrasound contrast bubbles as flow tracer particles. The performance of the technique is first tested in a straight tube, with...
journal article 2009
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Korteland, S. (author), Bottero, S. (author), Hassanizadeh, S.M. (author), Berentsen, C.W.J. (author)
Use of a correct definition of average pressure is important in numerical modeling of oil reservoirs and aquifers, where the simulated domain can be very large. Also, the average pressure needs to be defined in the application of pore-network modeling of (two-phase) flow in porous media, as well as in the (theoretical) upscaling of flow...
journal article 2009
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Hemel, Z. (author), Kats, L.C.L. (author), Groenewegen, D.M. (author), Viser, E. (author)
The realization of model-driven software development requires effective techniques for implementing code generators for domain-specific languages. This paper identifies techniques for improving separation of concerns in the implementation of generators. The core technique is code generation by model transformation, that is, the generation of a...
journal article 2009
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Buzink, S.N. (author), Botden, S.M.B.I. (author), Heemskerk, J. (author), Goossens, R.H.M. (author), De Ridder, H. (author), Jakimowicz, J.J. (author)
Background: It is a tacit assumption that clinically based expertise in laparoscopic tissue manipulation entails skilfulness in angled laparoscope navigation. The main objective of this study was to investigate the relation between these skills. To this end, face and construct validity had to be established for the place arrow (PA) and camera...
journal article 2009
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Gu, G. (author), Mansouri, H. (author), Zangiabadi, M. (author), Bai, Y.Q. (author), Roos, C. (author)
We present several improvements of the full-Newton step infeasible interior-point method for linear optimization introduced by Roos (SIAM J. Optim. 16(4):1110–1136, 2006). Each main step of the method consists of a feasibility step and several centering steps. We use a more natural feasibility step, which targets the ?+-center of the next pair...
journal article 2009
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Sorokin, D.Y. (author), Detkova, E.N. (author), Muyzer, G. (author)
Evidence on the utilization of simple fatty acids by sulfate-reducing bacteria (SRB) at extremely haloalkaline conditions are practically absent, except for a single case of syntrophy by Desulfonatronum on acetate. Our experiments with sediments from soda lakes of Kulunda Steppe (Altai, Russia) showed sulfide production with sulfate as electron...
journal article 2009
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Schramkowski, G.P. (author), De Swart, H.E. (author), Schuttelaars, H.M. (author)
A three-dimensional numerical model with a prognostic salinity field is used to investigate the effect of a partial slip bottom boundary condition on lateral flow and sediment distribution in a transect of a tidally dominated channel. The transect has a symmetrical Gaussian cross-channel bottom profile. For a deep, well-mixed, tidally dominated...
journal article 2009
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Van der Star, W.R.L. (author), Dijkema, C. (author), De Waard, P. (author), Picioreanu, C. (author), Strous, M. (author), Van Loosdrecht, M.C.M. (author)
The cytoplasm of anaerobic ammonium oxidizing (anammox) bacteria consists of three compartments separated by membranes. It has been suggested that a proton motive force may be generated over the membrane of the innermost compartment, the “anammoxosome”. 31P nuclear magnetic resonance (NMR) spectroscopy was employed to investigate intracellular...
journal article 2009
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Lalpoor, M. (author), Eskin, D.G. (author), Katgerman, L. (author)
Thermally induced strains and stresses developed during direct-chill (DC) semicontinuous casting of high strength aluminum alloys can result in formation of micro-cracks in different locations of the billet. Rapid propagation of such micro-cracks in tensile thermal stress fields can lead to catastrophic failure of ingots in the solid state...
journal article 2009
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Kuenen, J.G. (author), Konings, W.N. (author)
Storing and transporting of urine samples for doping analysis, as performed by the anti-doping organizations associated with the World Anti-Doping Agency, does not include a specific protocol for cooled transport from the place of urine sampling to the doping laboratory, although low cost cooling facilities can easily be made available. As a...
journal article 2009
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Salimi, H. (author), Bruining, H. (author)
Flow modeling in fractured reservoirs is largely confined to the so-called sugar cube model. Here, however, we consider vertically fractured reservoirs, i.e., the situation that the reservoir geometry can be approximated by fractures enclosed columns running from the base rock to the cap rock (aggregated columns). This article deals with the...
journal article 2009
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Van Eck, D. (author)
In this paper, I discuss a methodology for the conversion of functional models between functional taxonomies developed by Kitamura et al. (2007) and Ookubo et al. (2007). They apply their methodology to the conversion of functional models described in terms of the Functional Basis taxonomy into functional models described in terms of the...
journal article 2009
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Van der Put, T.A.C.M. (author)
The failure criterion is an essential part of all strength calculations of design. It was shown in the past that the tensor-polynomial equation could be regarded as a polynomial expansion of the real failure surface. Now it is shown that the third-degree polynomial is identical to the real failure criterion. It is also shown that the second...
journal article 2009
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Thuwis, G.A.A. (author), De Breuker, R. (author), Abdalla, M.M. (author), Gürdal, Z. (author)
The aim of the present work is to passively reduce the induced drag of the rear wing of a Formula One car at high velocity through aeroelastic tailoring. The angle-of-attack of the rear wing is fixed and is determined by the required downforce needed to get around a turn. As a result, at higher velocity, the amount of downforce and related...
journal article 2009
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Walraven, J.C. (author)
High performance fiber reinforced concrete is developing quickly to a modern structural material with a high potential. As for instance testified by the recent symposium on HPFRC in Kassel, Germany (April 2008) the number of structural applications increases. At this moment studies are carried out with the aim to come to an international...
journal article 2009
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Veraar, M.C. (author)
journal article 2009
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Pluyter, J.R. (author), Buzink, S.N. (author), Rutkowski, A.F. (author), Jakimowicz, J.J. (author)
Background. Surgeons perform complex tasks while exposed to multiple distracting sources that may increase stress in the operating room (e.g., music, conversation, and unadapted use of sophisticated technologies). This study aimed to examine whether such realistic social and technological distracting conditions may influence surgical performance...
journal article 2009
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