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Sun, Zhuo (author), van de Giessen, M. (author), Lelieveldt, B.P.F. (author), Staring, M. (author)Mild Cognitive Impairment (MCI) is an intermediate stage between healthy and Alzheimer’s disease (AD). To enable early intervention it is important to identify the MCI subjects that will convert to AD in an early stage. In this paper, we provide a new method to distinguish between MCI patients that either convert to Alzheimer’s Disease (MCIc)...journal article 2017
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Knippenberg, S.B. (author)In some types of endovascular surgery on the aorta, a catheter needs to be placed in a renal artery to enable renal artery stenting. Therefore, a catheter and a medical guide wire are maneuvered through the vascular system and placed inside the renal artery. In one in eight patients, the renal artery is angulated ≤50°, which could cause the...master thesis 2016
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Pizzo, A. (author), Chepuri, S.P. (author), Leus, G.J.T. (author)In this paper we focus on the relative position and orientation estimation between rigid bodies in an anchorless scenario. Several sensor units are installed on the rigid platforms, and the sensor placement on the rigid bodies is known beforehand (i.e., relative locations of the sensors on the rigid body are known). However, the absolute...conference paper 2016
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Stoute, R. (author), Louwerse, M.C. (author), Henneken, VA (author), Dekker, R. (author)Minimally invasive surgery of the most lethal disease worldwide, coronary artery disease, benefits from better diagnostic tools during the treatment. With this in mind, a novel concept is introduced for intravascular ultrasound on a 360 μm diameter guidewire. The complex manufacture of this medical instrument, and other devices that require...journal article 2016
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Huizinga, W. (author), Poot, D.H.J. (author), Roshchupkin, G. (author), Bron, E. E. (author), Ikram, M. A. (author), Vernooij, M. W. (author), Rueckert, D. (author), Niessen, W.J. (author), Klein, S. (author)Both normal aging and neurodegenerative diseases such as Alzheimer's disease cause morphological changes of the brain. To better distinguish between normal and abnormal cases, it is necessary to model changes in brain morphology owing to normal aging. To this end, we developed a method for analyzing and visualizing these changes for the...conference paper 2016
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Stoute, R. (author), Louwerse, M.C. (author), Van Rens, J. (author), Henneken, V.A. (author), Dekker, R. (author)We propose a novel concept for a high-speed optical data link in Ø 360 µm cardiovascular interventional imaging guidewires. The concept is based on the recently introduced Flex-to-Rigid (F2R) technology platform. This technology allows for smaller intravascular imaging devices with a more compact form-factor. We extended the existing F2R...conference paper 2015
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- Sangers, A. (author) master thesis 2014
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- De Jong, J.H.H. (author) master thesis 2014
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Smidt, D.M. (author)This research is twofold. Firstly it treats the complexity of design using a computational intelligent method to achieve, with regard to a limited set of goals, high performing designs. Secondly, an architectural and structural challenge to conceptually design a freeform roof framework, which integrates structural rigidity and non-standard...master thesis 2014
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Jönsthövel, T.B. (author), Van Gijzen, M.B. (author), Vuik, C. (author), Scarpas, A. (author)Large discontinuities in material properties, such as those encountered in composite materials, lead to ill-conditioned systems of linear equations. These discontinuities give rise to small eigenvalues that may negatively affect the convergence of iterative solution methods such as the preconditioned conjugate gradient method. This paper...journal article 2013
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Chevtchenko, O. (author), Zuijderduin, R. (author), Smit, J. (author), Willen, D. (author), Lentge, H. (author), Thidemann, C. (author), Traeholt, C. (author)Particulars of 6 km long HTS AC power cable for Amsterdam project are: a cable has to fit in an annulus of 160 mm, with only two cooling stations at the cable ends [1]. Application of existing solutions for HTS cables would result in excessively high coolant pressure drop in the cable, possibly affecting public acceptance of the project. In...journal article 2012
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Crobach, C.H.F.M. (author)Simulation gaming (SG) is a method that is increasingly used to improve business processes in various organizations. Currently no formal framework for SG exists, though having such a framework can have a lot of advantages. This thesis describes the development of a formal framework for rigid-rule SG, which is done in a deductive and inductive...master thesis 2012
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Jönsthövel, T.B. (author), Van Gijzen, M.B. (author), MacLachlan, S. (author), Vuik, C. (author), Scarpas, A. (author)Many applications in computational science and engineering concern composite materials, which are characterized by large discontinuities in the material properties. Such applications require fine-scale finite-element meshes, which lead to large linear systems that are challenging to solve with current direct and iterative solutions algorithms....journal article 2012
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Blanc, M. (author), Rault, G. (author), Thorel, L. (author), Almeida, M.S.S. (author), Almeida, M.C.F. (author)Reinforcing compressible soils by rigid inclusions is a method to reduce and homogenize settlements under many types of structures. A granular mattress, located between the structure and the group of piles, transfers part of the loads on the surface to the head of the piles anchored in rigid substrate. An experimental device, a mobile tray, has...conference paper 2012
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Jönsthövel, T.B. (author), Van Gijzen, M.B. (author), MacLachlan, S. (author), Vuik, C. (author), Scarpas, A. (author)The demand for large FE meshes increases as parallel computing becomes the standard in FE simulations. Direct and iterative solution methods are used to solve the resulting linear systems. Many applications concern composite materials, which are characterized by large discontinuities in the material properties. An example of such a material is...report 2011
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Jönsthövel, T.B. (author), Van Gijzen, M.B. (author), Vuik, C. (author), Scarpas, A. (author)Large discontinuities in material properties, such as encountered in composite materials, lead to ill-conditioned systems of linear equations. These discontinuities give rise to small eigenvalues that may negatively affect the convergence of iterative solution methods such as the Preconditioned Conjugate Gradient (PCG) method. This paper...report 2011
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Steutel, P. (author)The majority of existing problems within conventional prosthetic fingers are related to the use of conventional rigid links and kinematic joints and to the lack of adaptability of the finger. In this paper these problems are solved by the design of a fully compliant under-actuated prosthetic finger. At first a basic structure was defined....master thesis 2010
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De Proft, K. (author), Heyens, K. (author), Sluys, L.J. (author)This paper uses the Generalized Finite Element method for the introduction of the cohesive joint behaviour to model masonry. Cracked joints are modelled as displacement discontinuities and are introduced in the finite element model by additional degrees of freedom. These degrees of freedom are activated when the stress state in the joint reaches...conference paper 2009
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- Pavel, M.D. (author), Götz, J. (author), Vu, B. (author), Jump, M. (author) conference paper 2008
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Tonn, T. (author), Urban, K. (author)We consider a convection-diffusion problem in a box in which rigid bodies are present. The location and orientation of these bodies are subject to a set of parameters. In order to use a reduced basis method, we perform a two-step method. In the first step, we transform the parameter-dependent geometric situation to a reference situation (also...conference paper 2006