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Groen, M. (author), Van Schravendijk, M. (author), Barrett, R. (author), Vos, R. (author)The dynamic response of a new class of flight control actuators that rely on post-buckled recompressed (PBP) piezoelectric elements is investigated. While past research has proven that PBP actuators are capable of generating deflections three times higher than conventional bimorph actuators, this paper quantifies the work output and power...conference paper 2009
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Straathof, M.H. (author), Van Tooren, M.J.L. (author), Voskuijl, M. (author), Vos, R. (author)A new parametrization method for aircraft shapes is presented to enhance shape optimization for aircraft design. This parametrization method was implemented in a tool that creates feasible initial solutions for multidisciplinary design optimization problems. The tool combines all aspects of the aerodynamic design process: parametrization, aero...conference paper 2010
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- Vos, H. (author) conference paper 2012
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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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Vos, P.E.J. (author), Gerritsma, M.I. (author)This papers describes the use of the Least-Squares Spectral Element Method to polynomial Chaos to solve stochastic partial differential equations. The method will be described in detail and a comparison will be presented between the least-squares projection and the conventional Galerkin projection.conference paper 2006
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Peruzzini, D. (author), Viti, J. (author), Tortoli, P. (author), Verweij, M.D. (author), De Jong, N. (author), Vos, H.J. (author)Currently, in medical ultrasound contrast agent (UCA) imaging the second harmonic scattering of the microbubbles is regularly used. This scattering is in competition with the signal that is caused by nonlinear wave propagation in tissue. It was reported that UCA imaging based on the third or higher harmonics, i.e. “superharmonic” imaging, shows...conference paper 2015
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Vos, W. (author), De Backer, J. (author), Devolder, A. (author), Partoens, B. (author), Parizel, P. (author), De Backer, W. (author)Functional imaging of the respiratory system is a new domain where the respiratory dynamics (such as airflow in the lungs and particle deposition) are studied by means of modern engineering techniques. A three dimensional model of a patient specific bronchial tree is constructed from a computed tomography scan. By segmenting the desired region...conference paper 2006
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Vos, R. (author), Barrett, R. (author)A new type of adaptive structure is presented that relies on pressurized honeycomb cells that extent a significant length with respect to the plane of the hexagons. By varying the pressure inside each of the cells, the stiffness can be altered. A variable stiffness in combination with an externally applied force field results in a fully embedded...conference paper 2010
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Scheepstra, J. (author), Vos, R. (author), Barrett, R. (author)A new method for designing a morphing Fowler flap based on pressure-adaptive honeycomb is detailed. Pressure adaptive honeycomb has been shown to be able to induce gross camber deformations in airfoil sections, such as a flap. However, due to the large amount of design variables the integration of the honeycomb as a distributed actuator in a...conference paper 2011
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Vos, R. (author), Barrett, R. (author)A new type of adaptive structure is presented that relies on a pressure derential to perform gross structural deformations. This structure relies on highly compliant honey-comb cells that can be pressurized externally or can rely on a pressure differential that exists at elevated altitudes. By pressurizing this honeycomb, its stiffness can be...conference paper 2010
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Vos, P.E.J. (author), Gerritsma, M.I. (author)This papers describes the use of the Least-Squares Spectral Element Method to polynomial Chaos to solve stochastic partial differential equations. The method will be described in detail and a comparison will be presented between the least-squares projection and the conventional Galerkin projection.conference paper 2006
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De Backer, J. (author), Vos, W. (author), Vanderveken, O. (author), Devolder, A. (author), Braem, M. (author), Van Dyck, D. (author), De Backer, W. (author)Obstructive Sleep Apnea (OSA) is a condition in which the patient repeatedly stops breathing during sleep due to the collapse of the upper airway. The upper airway collapse is caused by a relaxation of the upper airway muscles, combined with a decrease in intraluminal pressure and hence an increase in external pressure from the surrounding...conference paper 2006
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- Melles, M. (author), Erasmus, V. (author), van Loon, M. (author), Tassoul, M. (author), van Beeck, E.F. (author), Vos, M.C. (author) conference paper 2013
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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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Wever, R. (author), Schermer, R. (author), Smit, L. (author), Vos, L. (author)Besides contributing to the actual sustainability performance of a product-packaging combination, packaging can also play a role in communicating about sustainability. Such green marketing aspects of packaging may either focus on the sustainability credentials of the packaging itself, or on the credentials of the product contained (or even the...conference paper 2015
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Vos, R. (author), Hoogreef, M.F.M. (author)This paper presents a semi-analytical method for the weight estimation of fuselages with an oval cross-section, applied to blended wing body aircraft. The weight estimation of the fuselage primary structure is based on a structural analysis of two-dimensional crosssections and it is completed by a set of empirical relations for the weight...conference paper 2013
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Zhao, L. (author), Botha, C.P. (author), Truyen, R. (author), Vos, F.M. (author), Post, F.H. (author)Many computer aided diagnosis (CAD) schemes have been developed for colon cancer detection using Virtual Colonoscopy (VC). In earlier work, we developed an automatic polyp detection method integrating flow visualization techniques, that forms part of the CAD functionality of an existing Virtual Colonoscopy pipeline. Curvature streamlines were...conference paper 2008
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Vos, R. (author), Van Dommelen, J. (author)This paper details a new software tool to aid in the conceptual design of blended-wingbody aircraft. The tool consists of four main modules. In the preliminary sizing model a class I estimate of the maximum take-off weight, wing loading, and thrust-to-weight ratio is calculated. This information is used together with an initial guess of the 30...conference paper 2012
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Vos, R. (author), Scheepstra, J. (author), Barrett, R. (author)The paper begins with a brief historical overview of pressure adaptive materials and structures. By examining avian anatomy, it is seen that pressure-adaptive structures have been used successfully in the Natural world to hold structural positions for extended periods of time and yet allow for dynamic shape changes from one flight state to the...conference paper 2011
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Elmendorp, R.J.M. (author), Vos, R. (author), La Rocca, G. (author)A design method is presented that has been implemented in a software program to investigate the merits of conventional and unconventional transport airplanes. Design and analysis methods are implemented in a design tool capable of creating a conceptual design based on a set of toplevel requirements. In contrast to established design methods,...conference paper 2014