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van der Lubbe, J.C.A. (author)
Image quality plays an important role on the various levels of image processing. However, until now it lacks a survey of methods for the evaluation of image quality. With a grant of the Netherlands Agency for Aerospace Programs (NIVR) a study was performed with respect to the quantification of image quality. Some results of this study are...
report 1984
document
van den Assem, D. (author), Huijser, R.H. (author)
An optical diagnostic instrument is being developed for fluid physics research in the microgravity environment of a space laboratory. The instrument offers a whole filed observation system with a Schlieren overlay combined with a local narrow field observation capability, the stake system. The latter allows for operation of a variety of optical ...
report 1987
document
Bugler, J.W. (author), Hanslip, N.C. (author)
The College of Aeronautics was founded in 1946 and was granted university status in 1969 becoming the Cranfield Institute of Technology. In 1993 it changed its name to Cranfield University.
report 1960
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report 1959
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Pianese, C. (author), Benocci, C. (author)
The purpose of the present work is to simulate numerically the spatially developing plane mixing layer solving the three dimensional incompressible Navier-Stokes equations in the primitive variables u - p formulation with the Large Eddy Simulation model of turbulence. Discretization in space is achieved using a finite volume technique on a...
report 1991
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Patterson, G.N. (author)
report 1979
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Storm van Leeuwen, S. (author), van de Leijgraaf, R. (author)
Nowadays, several flight test organizations recognize the potential of the Navstar Global Positioning System (GPS) for flight test trajectorydetermination. In 1990 the National Aerospace Laboratory of the Netherlands (NLR) started the development of a Position Reference System (PRS) based on an Inertial Reference System (IRS), updated by GPS...
report 1993
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Swallow, J.E. (author), Mikolajewski, E. (author)
A fractionally-replicated experimental design has been applied to results for six fabrics tested by the authors' method for the snatch-tearing of fabrics. Only eight tests are required on each fabric, and the computations are greatly simplified in comparison with those for full factorial experiments. The principal factors and regression...
report 1967
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Brogliato, B. (author), ten Dam, A.A. (author), Paoli, L. (author), Génot, F. (author), Abadie, M. (author)
This paper focuses on the problems related to the numerical simulation of finite dimensional nonsmooth multibody mechanical systems. The rigid body dynamical case is examined here. This class of systems involves complementarity conditions and impact phenomena which make its study and numerical analysis a difficult problem that cannot be solved...
report 2001
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Zandbergen, T. (author), de Boer, E. (author)
A computer program written in Fortran IV and based on the method of Levinsky has been developed for the calculation of the spanwise lift distribution on wings with deflected slipstreams. This report gives a description of Levinsky's method and detailed information on the computer program. Results of computations are compared with experimental...
report 1972
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Terry, F.L.C. (author)
The windscreen of an aircraft flown at high speeds and low altitudes is subject to erosion damage resulting from impacts with airborne particles of dust and sand. In unfavourable atmospheric conditions, the optical quality may be reduced to an extent where replacement of the damaged optical surface is necessary after only a few flying hours. The...
report 1961
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Dekker, G.J. (author), Hameetman, G.J. (author)
Bij het ontwikkelen van de standregelprogrammatuur voor de Italiaanse satelliet SAX is gebruik gemaakt van een aantal CASE tools. Naast een beschrijving van de standregelprogrammatuur, met als hoofdeisen een hoge mate van bedrijfszekerheid en een hoge flexibiliteit, worden de ontwikkelsituatie en de ontwikkelomgeving beschreven. Geschetst wordt...
report 1993
document
Soemarwoto, B.I. (author), Kok, J.C. (author)
Computations of three-dimensional unsteady supersonic cavity flow are performed for a freestream Mach number of 1.2. Two cavity geometries are considered: (i) a simple rectangular cavity of length-to-depth (L/D) and length-to-width (L/W) ratios of 4.5, and (ii) a cavity with a 45° ramp attached to the downstream wall of the simple rectangular...
report 2001
document
Pelleg, J. (author)
Measurements of lattice diffusion coefficients for 44Ti in niobium single crystals were made in the temperature range of 994-1492°C using an anodizing-stripping sectioning technique. The temperature dependence of the diffusion coefficients within this range follows an Arrhenius relation and can be expressed as Exp[-(86930 ± 2160)/RT] cm 2/sec....
report 1970
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Nooren, G.J.L. (author)
Paper presented at 3rd International Colloquium on Spectral Signatures Objects in Remote Sensing, Les Arcs, 16-20 December 1985.
report 1986
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Mather, G.K. (author)
The following Report is a brief history of tbe NAE instrumented T -33. The present design of the instrumentation system and its characteristics are described in some detail, as well as tbe approach to data reduction.
report 1967
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Schra, L. (author)
In this addendum to report NLR TR 82054 U the results of additional fracture toughness tests and of prolonged stress corosion tests are given. A considerably better resistance to crack extension of the IM alloys 7075-T73 and 7050-T736 as compared to the PM alloy X7091-T7E69 was found in the fracture toughness tests for the same test orientation...
report 1983
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Niedzwiecki, A. (author)
report 1978
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McGregor, D.M. (author)
A flight investigation of various stability augmentation systems for the Hawker - Siddeley P1127 jet-lift V/STOL aircraft, using a variabie stability helicopter, is reported. The main emphasis was placed on overcoming the directional divergence due to the unstable weathercock stability that occurs at low airspeeds , but short investigations of a...
report 1968
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Digby, P.K. (author), Paul, W.J. (author), Connoly, J.V. (author)
The College of Aeronautics was founded in 1946 and was granted university status in 1969 becoming the Cranfield Institute of Technology. In 1993 it changed its name to Cranfield University.
report 1955
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