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- Vos, J. (author), Cremers, B.B. (author), Drijkoningen, G.G. (author), Fokkema, J.T. (author) conference paper 1995
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Pullen, W.R. (author), van der Voordt, Theo (author), van Meel, JJ (author), Vos, PGJC (author)In dit paper wordt ingegaan op drie vragen die in het debat over de effecten van kantoorinnovatie (‘nieuwe werkomgevingen’) steeds weer naar voren komen:<br/>- Werkt het beter?<br/>- Werkt het prettiger?<br/>- Is het goedkoper?conference paper 2001
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Barrett, R. (author), McMurtry, R. (author), Vos, R. (author), Tiso, P. (author), De Breuker, R. (author)This paper describes a new class of flight control actuators using Post-Buckled Precompressed (PBP) piezoelectric elements. These actuators are designed to produce significantly higher deflection and force levels than conventional piezoelectric actuator elements. Classical laminate plate theory (CLPT) models are shown to work very well in...conference paper 2005
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Vos, R. (author), Barrett, R. (author), Krakers, L. (author), Van Tooren, M. (author)This paper presents the use of a new class of flight control actuators employing Post-Buckled Precompressed (PBP) piezoelectric elements in morphing wing Uninhabited Aerial Vehicles (UAVs). The new actuator relieson axial compression to amplify deflections and control forces simultaneously. Two designs employing morphingwing panels based on PBP...conference paper 2006
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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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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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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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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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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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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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- Gerritsma, M.I. (author), Vos, P. (author), Van der Steen, J.B. (author) conference paper 2008
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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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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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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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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, 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, 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), 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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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