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Bots, P.W.G. (author), van Daalen, C. (author), Dopper, S.M. (author), Westink, J.M. (author)The PrESTO system is a peer review and peer assessment tool that allows large numbers of students to practice open-ended assignments, while keeping the workload of the teaching staff manageable. PrESTO was originally developed for a quantitative modeling course, but is applicable to any course with open-ended assignments that can be divided...conference paper 2019
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van Berkel, S.L. (author), Garufo, A. (author), Llombart, Nuria (author), Neto, A. (author)In this article, we present a freely accessible software tool that allows for fast characterization of dynamic phenomena in a wide variety of transmission lines that include characteristic impedance, effective dielectric constant, and losses, such as radiation into space and surface waves. For printed transmission lines, the radiation effects...journal article 2016
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Verloop, B.W.J. (author)The focus of this research is on Multi Criteria Decision Making (MCDM) in complex multi actor environments. Within the field of MCDM, the Analytical Hierarchy Process (AHP) is known for its usage in complex situations. Therefore the focus will be on AHP as a well-known and often used MCDM. This study can function as a benchmark for other MCDM...master thesis 2014
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Van der Sluijs, I.L. (author)This project develops a software tool to model pressure loss of two phase flow in the annulus of a well during underbalanced drilling. By adjusting the Mukherjee and Brill correlation for production/injection wells, insight into which parameters are of influence in predicting the frictional pressure drop during underbalanced drilling is gained....bachelor thesis 2011
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Verwer, J. (author), Loeve, W. (author), Snijdoodt, E. (author), ten Dam, A. (author)In The Netherlands as a result of a national HPCN initiative a Foundation HPCN was established in 1995. The purpose of this Foundation is to stimulate structural and lasting cooperation of universities, technological institutes and industry in economically relevant applications of HPCN. Projects have been selected and since the beginning of 1996...report 1997
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Kuiper, H. (author), van der Wees, A.J. (author), Hendriks, C.F.W. (author), Labrujère, T.E. (author)NLR participates in the ECARF (European Computation Aerodynamics Research Project) "Optimum Design" project, developing an algorithm for multi-point airfoil design. Within the ECARP project a test case has been defined for two-point design with the aid of well-specified target pressure distributions. It appears that optimization of pressure...report 1995
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Arendsen, P. (author), van Dalen, F. (author), Bill, C. (author), Rothwell, A. (author)In a joint research project between the National Aerospace Laboratory (NLR) and the Faculty of Aerospace Engineering of Delft University of Technology (TUD) a multi-level system for the preliminary design of aircraft structures has been developed. The present system is essentially an extension of the existing Aircraft Design and Analysis System ...report 1995
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Loeve, W. (author), Baalbergen, E.H. (author)In development of High Performance Computing and Networking (HPCN) for simulation applications several targets have to be realized. It is recpiired to maximize not only computational speed but also to maximize applicability in engineering environments. For applications in which HPCN-based simulations are economically and technically necessary...report 1994
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de Jong, S. (author)The predesign document of DEFMEF presents the decisive requirements for the DEFMEF language and the associated DEFMEF translator. It also shows a basic technical design, which fulfills the requirements. DEFMEF as a software design language has been designed so, that it is possible to describe both a technical design and a detailed design with it...report 1991
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Couwenberg, H.J.H. (author), ten Dam, A.A. (author)During operations with a manipulator arm situations will occur when the manipulator end-effector is, or comes, in contact with its environment. The dynamics equations, which describe the motion of the manipulator, can be represented by an ordinary differential equation for the free motion and an additional algebraic (in)equality for the motion...report 1990
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van der Wees, A.J. (author), van den Berg, J.I. (author)NLR mainly performs applied scientific research for use in the aerospace industry. In many cases the product has the form of an information system for the design, production and usage of aerospace vehicles. Within this context, the mathematician contributes, in cooperation with specialists from other disciplines such as aerodynamics, structures,...report 1990
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Kordes, F.L.G. (author), Schuurman, J.J. (author)In order to get a better sight on the performance of compression and encryption algorithms under various conditions a simulation environment is needed. Within this simulation environment It must be possible to investigate the influence of code tables, channel characteristics and frame formats on the performance of the algorithms. In this report...report 1989
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van Hulzen, J.J.P. (author)This manual describes the use of two tools for the development of software: - the COLAS Program Generator (CPG), which generates the complete control part of programs for interactive use from a specification of the user interaction. In addition the specifications needed for the COLAS command definition and stubs for the application routines are...report 1988
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Kat, P.J. (author), Donker, J.C. (author)NEXT 1.2 is an expert system shell developed at NLR. NEXT has a knowledge representation mechanism based on a combination of context tree and production rules. The inference mechanism is based on a combination of backward and forward reasoning. NEXT 1.2 is available on a CYBER 180/855 under NOS and on a VAX under VMS. Supply of other...report 1987
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Pronk, C.N.A. (author)In the framework of ESA's programma for Robotics, Tele-operation and Servicing (RTS) a powerful simulation tool has to be developed to support the various stages in the development process of systems and operations. Therefore, ESA has initiated the development of a European Robotic Operations Simulator (EUROSIM). Two parallel studies, funded and...report 1987
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van den Berg, J.I. (author)In the development of mathematical simulation methods for engineering processes, it is essential to validate the mathematical models. Its results must be compared with results from other calculation methods or measurements. This is especially true in computational fluid dynamics (CFD). It is essential that an engineer developing mathematical...report 1987
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van Hulzen, J.J.P. (author)The informatics policy at NLR is focussed on providing an infrastructure for the development of information systems. A new component in the infrastructure is the method base system, designed to support the management and use of algorithm implemented in programs. The preliminary design analyses the functions of the method base system and...report 1987
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van Hulzen, J.J.P. (author), de Moel, R.P. (author)Technical/industrial automation focusses on the primary business processes, such as design and fabrication of products. In view of the importance extensive studies are required to demonstrate the feasibility and to motivates various choices. Moreover stringent requirements for the information supply will be defined. The National Aerospace...report 1986
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van den Dam, R.F. (author)The use of numerical simulation and optimization techniques is rapidly expanding in all fields of engineering design. The place and the potential of these techniques in the design process, as well as their use by the designer, are discussed. The principles underlying these techniques are outlined and an overall view is given of the various...report 1985