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Maggi, F. (author)The measuring of the flocculation parameters is based on the analysis of the optical records obtained with the settling column. These records consist of images of aggregates or flocs grabbed with a digital camera. Flocs are lightened by means of a laser sheet coming from the side. The laser light is scattered by the flocs and recorded by the...report 2003
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- Godefroy, H.W.H.E. (author), Fang Yanjun, - (author) report 1994
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Spaan, F.H.P. (author), Kramer, A.J. (author)The schlleren observation technic[ue can be used in microgravity experiments. Alignment features for the gratings of a multiple source sharp focusing schlieren system have been analysed. Measurements have been performed to verify the theoretical predictions which show good agreement with the analysis results. The analysis allows for the...report 1993
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De Wit, P.J. (author)A research program was started to study the behaviour of cohesive sediments at the Delft University of Technology in 1989. As part of this project a well-provided physico-chemicallaboratory was built within the Hydromechanics Laboratory and adequate instrumentation was purchased. These new instruments and other instruments already present in the...report 1992
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Pinches, C.L. (author), Kuijpers, E.A. (author), Spaan, F. (author)Microgravity experiments operated using telescience concepts face certain constraints. The effect of these constraints on the focusing task are identified. Four types of focusing strategy, which provide a natural means of focusing in the presence of these constraints, are described. Three specific strategies are implemented as part of the...report 1991
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Kuijpers, E.A. (author)The Prototype Optical Diagnostic Instrument (PODI) has been extended to Teleoperated PODI (TelePODI) to allow for the study of telescience and image processing for microgee related instrumentation. TelePODI has been integrated in the Telescience Test Bed, phase I, at ESTEC to simulate remote control. Telescience pilot experiments have been...report 1990
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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
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da Riva, I. (author), Martinez, I. (author), Martinez-Val, R. (author), Sanz, A. (author), Huijser, R.H. (author), Visser, F.B. (author), Vreeburg, J.P.B. (author)The report presents a design study, within a specified envelope of resources, of laboratory for scientific research on fluid material in a space station, A survey of the scientific background of mlcrogravity experiments identifies candidate investigations. A structured description of available facilities, or earlier design studies, provides a...report 1987
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Delil, A.A.M. (author)Two-phase flow heat transport systems (thermal busses) for the Columbus Space Platform and the Space Station are expected to incorporate systems to control the liquid flow rates into the evaporative cold plates. Such a control system consists of a sensor that monitors the cold plate (performance), a control algorithm and an actuator i.e. a valve...report 1986
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Huijser, R.H. (author)A conceptual design for a research facility for critical point phenomena in Spacelab's microgravity environment is presented. In the critical point facility (CPF) four experiments can be performed in parallel. The CPF consists of five parts: four experiment units and a service module. The experiment units offer the user-provided (instrumented)...report 1985
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Vreeburg, J.P.B. (author)In the introduction of this Part the original objectives of the FPIS are recalled and the study strategy is indicated. Next chapters provide the logic and intermediate results as described in FPIS Final Report Part 1 System Aspects, Part 2 Detailed Design and Part 3 Breadboarding and Test Results. The final sections deal with important...report 1985
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Delil, A.A.M. (author)Radiation heat transfer is a non-negligible physical process in an open-cycle magnetohydrodymic generator. It constitutes an important part of the energy conservation law, one of the fundamental equations describing the behaviour of the MHD combustion gas in the generator. Radiation heat transfer is modelled following the generally accepted...report 1983
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van der Veen, J.C.T. (author)Fiber optics, a rapidly advancing new technology, seems very well suited for use as data transmission medium in aircraft. The advantages are substantial: galvanic isolation, electromagnetic compatibility, savings in volume and weight, and superior transmission qualities. In this report possibilities and limitations are discussed for using...report 1983
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Terpstra, A.P. (author), van den Dam, R.F. (author), van Woerkom, P.T.L.M. (author), Zwartbol, T. (author)This document describes two computer programs developed during a study of the application of modern control techniques in the area of spacecraft attitude control. Theory and simulation results are described in part I of this report. In part II a general overview of the tasks of the simulation program is presented, and program design aspects are...report 1982
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Sevenhuijsen, P.J. (author)The measurement of deformations remains an important discipline for the development and evaluation of structures. The report gives a survey of the most important measurement methods now available. Aspects of light which are vital for the understanding of optical methods are treated because these methods become more and more important. The...report 1982
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van Woerkom, P.Th.L.M. (author), Sonnenschein, F.J. (author)The study deals with the rotational motion of a spin-stabilized spacecraft equipped with a V-slit sun sensor and the X-slit ESA starmapper. Assuming complete absence of an a priori attitude estimate, it is required to produce a rough estimate of the spacecraft attitude motion. It was assumed that sensor misalignments, external torques and...report 1979
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van Woerkom, P.Th.L.M. (author), Sonnenschein, F.J. (author)The study deals with the rotational motion of a spin-stabilized spacecraft equipped with a V-slit sun sensor and the X-slit ESA starmapper. Assuming complete absence of an a priori attitude estimate, it is required to produce a rough estimate of the spacecraft attitude motion. It was assumed that sensor misalignments, external torques and...report 1979
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Bunnik, N.J.J. (author)The spectral distribution of radiation reflected by crops in the visible light region and the near infrared contains information concerning crop structure and the optical properties of the leaves and the bounding soil. Non-destructive determination on remote distance of crop properties by means of the measured spectral distribution of reflected...report 1977