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Fatemi, J. (author), Lemmen, M.H.J. (author), TNO Industrie en Techniek (author)The present work addresses the computation of the effective thermal and mechanical properties of a honeycombcore sandwich panel. The panel considered has a hexagon-cell honeycomb core. An alternative method, based on the Gebhart factors within a hexagonal cell, is presented in addition to the familiar Swann-Pittman method. The advantage of the...article 2009
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Laan, E. (author), TNO Industrie en Techniek (author)Moon4You is an initiative led by the Dutch Organisation for Applied Scientific Research TNO, with partners from industry and universities in the Netherlands that aims to provide a combined Raman/LIBS instrument as scientific payload for lunar exploration missions, and specifically for Odyssey Moon's MoonOne mission, slated for launch in the...conference paper 2009
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- van Dalen, W.R. (author), van Halswijk, W.H.C. (author), TNO Defensie en Veiligheid (author) conference paper 2009
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Braam, B.C. (author), Meijer, E.A. (author), Nijenhuis, J.N. (author), Vink, R.J.P. (author), Kamphues, F.G. (author), TNO Industrie en Techniek (author)TNO is developing the Basic Angle Monitoring Opto-Mechanical Assembly for the GAIA mission of ESA, a space telescope that will create a map of the universe including distant stars and planets. GAIA is being built by EADS Astrium and scheduled for launch in 2011. Due to its stability and hardness properties, Silicon Carbide has been chosen for...conference paper 2009
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Simons, M. (author), Valk, P.J.L. (author)This primary objective of this paper is to discuss the usefulness of melatonin for reducing symptoms of circadian rhythm disturbances in aircrew. Literature and own data of circadian disruptions and symptoms of aircrew were analysed. Considerations concerning the use of melatonin by aircrew are discussed. The main outcomes were as follows....article 2009
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Janssen, S.A. (author), Vos, H. (author), Miedema, H.M.E. (author), van Kempen, E.E.M.M. (author), Breugelmans, O.R.P. (author), TNO Bouw en Ondergrond (author)On the basis of findings from recent surveys, discussion has been raised as to whether the annoyance of residents at a given aircraft noise exposure level has increased over the years. To verify the hypothesized trend and to identify its possible causes, the large database used to establish earlier exposure-response relationships was updated...conference paper 2009
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Halswijk, W.H.C. (author), TNO Defensie en Veiligheid (author)The Variable-Flow Ducted Rocket (VFDR) is a type of ramjet that can control the fuel mass flow to the combustion chamber. It combines the high efficiency at high-speed of ramjets with the throttlability of turbofans, and this makes VFDR propulsion an excellent choice for high speed, long range missiles. This is especially true because the...conference paper 2009
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Römer, G.W. (author), Del Cerro, D.A. (author), Sipkema, R.C.J. (author), Groenendijk, M.N.W. (author), Huis in 't Veld, A.J. (author), TNO Industrie en Techniek (author)By laser ablation with ultra short laser pulses in the pico- and femto-second range, well controlled dual scaled micro- and nano-scaled surface textures can be obtained. The micro-scale of the texture is mainly determined by the dimensions of the laser spot, whereas the superimposed nano-structure is the result of so-called laser induced "self...conference paper 2009
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TNO Defensie en Veiligheid (author), Osterloh, J.P. (author), Mistrzyk, K. (author), Ludtke, A. (author), Mioch, T. (author), Looije, R. (author), Gonzales Calleros, J.M. (author)HUMAN Model-based Analysis of Human Errors during Aircraft Cockpit System Design. Virtual Simulation Platform Description Technical Report HUMAN project, proj. number 211988, HUMAN/WP3/OFF/D3.4,report 2009
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TNO Defensie en Veiligheid (author), Mioch, T. (author), Osterloh, J.P. (author), Ludtke, A. (author), Biella, A. (author)HUMAN Model-based Analysis of Human Errors during Aircraft Cockpit System Design. Technical Report HUMAN project, proj. number 211988, HUMAN/WP4/TNO/D4.1 &th frameworkreport 2009
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Simons, M. (author), de Ree, H. (author)Reported percentages of in-flight medical incidents caused by syncope, the medical term for fainting, vary between 15 % and 22 %. Syncope is usually a benign medical event, but it may cause fear and distress among passengers and the individual involved. Incorrectly diagnosed benign syncope may lead to unnecessary flight diversions. In this...article 2008
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Yang, H. (author), Schenk, T.C.W. (author), Smulders, P.F.M. (author), Fledderus, E.R. (author), TNO Informatie- en Communicatietechnologie (author)This work investigates the joint impact of quantization and clipping, caused by analog-to-digital converters (ADCs) with low bit resolutions, on single- and multi-carrier block transmission systems in wireless multipath environments. We consider single carrier block transmission with frequency domain equalization (SC-FDE) and the multi-carrier...conference paper 2008
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Schreijer, A.J.M. (author), Cannegieter, S.C. (author), Caramella, M. (author), Meijers, J.C.M. (author), Krediet, R.T. (author), Simons, M. (author), Rosendaal, F.R. (author), TNO Defensie en Veiligheid (author)The mechanism of air travel-related venous thrombosis is unclear. Although immobility plays a pivotal role, other factors such as fluid loss may contribute. We investigated whether fluid loss occurred more in individuals with coagulation activation after air travel than in subjects without. As a secondary aim, we investigated whether fluid loss...article 2008
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van der Struijs, N.R. (author), van Es, E.M. (author), Raymann, R.J.E.M. (author), Daanen, H.A.M. (author), TNO Defensie en Veiligheid (author)Introduction: Subjects with a weak cold-induced vasodilatation response (CIVD) to experimental cold-water immersion of the fingers in a laboratory setting have been shown to have a higher risk for local cold injuries when exposed to cold in real life. Most of the cold injuries in real life, however, occur in the foot in cold air rather than in...article 2008
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Leijtens, J.A.P. (author), de Goeij, B.T.G. (author), van der Meché, E. (author), Eschen, M. (author), Court, A.J. (author), TNO Industrie en Techniek (author)To go beyond the point where micro satellites are seen as a way to qualify technology for use on a real satellite, small instruments are needed that can perform a socially or scientifically significant task. MIBS is a spectrometer operating in the thermal infrared wavelength region, designed in the frame of the phase A study for the ESA...bookPart 2008
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Groen, E.L. (author), TNO Defensie en Veiligheid (author)Dit artikel beschrijft de nieuwste resultaten van het ESA onderzoeksproject 'Motion perception' waarbij de correlatie wordt onderzocht tussen de gevoeligheid van astronauten voor Space Adaption Syndrome (SAS) en Sickness Induced by Centrifugation (SIC)article 2008
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TNO Defensie en Veiligheid (author), Javaux, D (author), Osterloh, J.P. (author), Ludtke, A. (author), Mioch, T. (author), Looije, R. (author), Muller, T. (author)HUMAN Model-based Analysis of Human Errors during Aircraft Cockpit System Design. Technical Report HUMAN project, proj. number 211988, HUMAN/WP1/AIF/D1.2. The document describes a list of error types, and associated error production mechanisms of particular relevance in modern cockpits in an ATM environment, and how this list has been obtained....report 2008
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Weiss, M. (author), TNO Defensie en Veiligheid (author)Traditionally performance analysis of guidance loops against weaving targets is performed by assuming that the acceleration of the target is sinusoidal (barrel-S maneuver) or, in any case, periodic with a fixed period. Either by direct simulation, or by using the Adjoint Method, it is easy to compute the miss distance for each of these maneuvers...conference paper 2008
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TNO Defensie en Veiligheid (author), Dekker, A. (author), van Gasteren, H. (author), Bouten, W. (author), Shamoun-Baranes, J. (author), Borst, A.J.M. (author), Holleman, I. (author), Dokter, A. (author), Ginati, A. (author), Garofalo, G. (author)The bird strike problem is a negative side effect of the aerial mobility of both aircraft and birds. A successful prevention strategy should therefore be based on knowledge of the mobility of both parties involved. While we know all the details of aircraft mobility, surprisingly little is known about the mobility of birds. Most bird strike...conference paper 2008
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van Erp, J.B.F. (author), van Veen, H.A.H.C. (author), Ruijsendael, M. (author), TNO Defensie en Veiligheid (author)Data show that spatial orientation in microgravity differs from that on Earth possibly facilitating space motion sickness and degrading performance. As a technology demonstration, we developed a Tactile Orientation Awareness Support Tool (TOAST) consisting of a vest with 56 vibrators. TOAST presents an artificial gravity vector by a localised...article 2007