Searched for: subject:"Terminals"
(1 - 20 of 110)

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Grillo, F. (author), Soethoudt, J. (author), Marques, E.A. (author), de Martin, L. (author), van Dongen, K. (author), van Ommen, J.R. (author), Delabie, A. (author)
article 2020
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Human, J.D. (author), Liebig, T. (author), den Breeje, R. (author), Gruber, J.M. (author), Moens, T.M.N. (author), Saathof, R. (author)
Multiple groups world wide are currently developing laser communication terminals for downlinking data from satellites in the LEO orbit directly to earth in the so call DTE (Direct To Earth) configuration. These terminals will require a network of ground stations to downlink their data. The challenge for the communication industry is the...
other 2019
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Dresscher, M. (author), Human, J.D. (author), Witvoet, G. (author), van der Heiden, N. (author), den Breeje, R. (author), Kuiper, S. (author), Fritz, E.C. (author), Korevaar, C.W. (author), van der Valk, N.C.J. (author), de Lange, T.J. (author), Saathof, R. (author), Doelman, N.J. (author), Crowcombe, W.E. (author), Duque, C.M. (author), de Man, H. (author)
The anticipated capacity benefit of optical satellite communications has triggered a cascade of technology developments. In this paper, we present three such technologies, namely; i). A cube satellite laser terminal (CubeCAT), ii). A lower Earth orbit satellite optical head (LEOCAT) and iii). A calibration and verification test bench for coarse...
conference paper 2019
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Saathof, R. (author), Crowcombe, W.E. (author), Kuiper, S. (author), van der Valk, N.C.J. (author), Pettazzi, F. (author), de Lange, T.J. (author), Kerkhof, P.J. (author), van Riel, M.C.J.M. (author), de Man, H. (author), Truyens, D.C. (author), Ferrario, I. (author)
Optical communications will complement radio frequency (RF) communications in the coming decades to enhance throughput, power efficiency and link security of satellite communication links. To enable optical communications technology for intersatellite links and (bi-directional) ground to satellite links, TNO develops a suite of technologies in...
conference paper 2018
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Witvoet, G. (author), Kuiper, S. (author), Meskers, A.J.H. (author)
This paper presents the first test results of a novel Fine Steering Mirror (FSM) for optical communication terminals. The FSM utilizes efficient variable reluctance actuators, tailored for the specific application, making it highly compact and power efficient. The test results demonstrate a high dynamical performance of <1.7kHz closed-loop...
conference paper 2018
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Veraar, R.G. (author), Wieling, W.P.W. (author)
Solid Fuel Ramjet (SFRJ) technology is a very attractive propulsion option to extend the range of gun launched projectiles mainly due to the combination of high specific impulse inherent to airbreathing propulsion and mechanical properties of the solid fuel capable of withstanding the very high launch loads in the gun. In 2004, the Netherlands...
conference paper 2018
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Saathof, R. (author), Crowcombe, W.E. (author), Kuiper, S. (author), Pettazzi, F. (author), Vosteen, L.L.A. (author), van der Valk, N.C.J. (author), Truyens, D.C. (author), den Breeje, R. (author), Ferrario, I. (author)
This paper presents the activities performed by TNO in the field of Space Laser Communication Terminals for high-volume low cost applications, and its plans for the further development of the required technologies for space terminals with particular emphasis on highly reliable, high performance, cost effective terminals.
conference paper 2018
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Zhang, D. (author), Najafi, M. (author), Zardetto, V. (author), Dörenkämper, M. (author), Zhou, X. (author), Veenstra, S. (author), Geerligs, L.J. (author), Aernouts, T. (author), Andriessen, R. (author)
The perovskite/c-Si tandem technology is considered as a cost-effective approach to realize a cell efficiency beyond the limit of single-junction (SJ) c-Si cells. Compared to its counterpart of 2-terminal (2T) configuration, 4-terminal (4T) tandem has the advantages such as no constraint of current matching and potentially simple mechanical...
article 2018
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Blondel, B. (author), Cuttini, M. (author), Hindori-Mohangoo, A.D. (author), Gissler, M. (author), Logh, M. (author), Prunet, C. (author), Heino, A. (author), Smith, L. (author), van der Pal-de Bruin, K. (author), Macfarlane, A.J. (author), Zeitlin, J. (author)
Objective: to describe how terminations of pregnancy at gestational ages at or above the limit for stillbirth registration are recorded in routine statistics and to assess their impact on comparability of stillbirth rates in Europe. Design: analysis of aggregated data from the Euro-Peristat project. Setting: 29 European countries. Population:...
article 2018
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Blanker, A.J. (author), Berendsen, P. (author), Phung, N. (author), Vroon, Z.E.A.P. (author), Zeman, M. (author), Smets, A.H.M. (author)
Multi-junction solar cells are considered for various applications, as they tackle various loss mechanisms for single junction solar cells. These losses include thermalization and non-absorption below the band gap. In this work, a tandem configuration comprising copper-indium-gallium-di-selenide (CIGS) and hydrogenated amorphous silicon (a-Si:H)...
article 2018
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Kurapati, S. (author), Kourounioti, I. (author), Lukosch, H. (author), Tavaszzy, L. (author), Verbraeck, A. (author), van Veen, L. (author), van Nuland, B. (author), Smit, T. (author)
Rail is a cost-effective and environment friendly freight transport modality when used efficiently. Stakeholders around Dutch ports are discouraged to choose rail due to uncertain train schedules and the dispersed nature of freight flows across terminals in the port. To understand the challenges and opportunities of freight transport using rail,...
conference paper 2017
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Kurapati, S. (author), Kourounioti, I. (author), Lukosch, H. (author), Tavaszzy, L. (author), Verbraeck, A. (author), van Veen, L. (author), van Nuland, B. (author), Smit, T. (author)
Rail is a cost-effective and environment friendly freight transport modality when used efficiently. Stakeholders around Dutch ports are discouraged to choose rail due to uncertain train schedules and the dispersed nature of freight flows across terminals in the port. To understand the challenges and opportunities of freight transport using rail,...
conference paper 2017
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Wetzels, F. (author), van den Berg, H. (author), Bosman, J. (author), van der Mei, R. (author)
Pre-congestion notification (PCN) protects inelastic traffic by using feedback on network link loads on and acting upon this accordingly. These actions comprise to admission control and termination of flows. Two PCN architectures have been defined by IETF: the centralized and decentralized PCN architecture. The decentralized PCN architecture has...
article 2017
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Hofman, W. (author), Rajagopal, M.R. (author)
Besides supporting bilateral transactions, enterprise interoperability can also be applied to coordinate operational processes of stakeholders. With today's technology, each of these stakeholders can be equipped with actuators like applications on smart devices. Where applications support interaction of a user with its environment, smart devices...
conference paper 2015
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van Gendt, A.W. (author), van der Pal, S.M. (author), Hermes, W. (author), Walther, F.J. (author), van der Pal-de Bruin, K.M. (author), de Groot, C.J.M. (author)
The aims of this study were to analyze reproductive outcomes of women and men born very preterm (gestational age <32 weeks) or with a very low birth weight (<1500 g) in 1983 in the Netherlands and to compare their reproductive outcomes with the total population at a similar age of 28 years. Young adults who were born after a pregnancy...
article 2015
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Zhang, D. (author), Soppe, W.J. (author), Schropp, R.E.I. (author), ECN Part of TNO (author)
Optical simulations of 4-terminal hybrid tandem modules combining high-efficiency crystalline silicon (c-Si) cells with three different thin-film top cells respectively are presented. We considered three types of thin film PV cells: 1. Enlarged-bandgap oxygenated amorphous silicon (a-SiO:H) cells, 2. Wide-bandgap chalcopyrite (CuGaSe2) cells,...
article 2015
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Verreault, J. (author)
The PELE ammunition is characterized by a low-density filling material surrounded by a high-density brittle jacket material. An analytical model describing the fragmentation of this ammunition behind a target plate is presented. This model assumes uniaxial strain in the filling and uses the RankingeHugoniot relations to calculate the material...
article 2015
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Brown, J.I. (author), Koç, Y. (author), Kooij, R.E. (author)
Given a finite, undirected graph G (possibly with multiple edges), we assume that the vertices are operational, but the edges are each independently operational with probability p. The (all-terminal) reliability, Rel(G,p), of G is the probability that the spanning subgraph of operational edges is connected. It has been conjectured that...
article 2014
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Terhal, P.A. (author), van Dommelen, P. (author), Le Merrer, M. (author), Zankl, A. (author), Simon, M.E. (author), Smithson, S.F. (author), Marcelis, C. (author), Kerr, B. (author), Kinning, E. (author), Mansour, S. (author), Hennekam, R.C. (author), van der Hout, A.H. (author), Cormier-Daire, V. (author), Lund, A.M. (author), Goodwin, L. (author), Mégarbané, A. (author), Lees, M. (author), Betz, R.C. (author), Tobias, E.S. (author), Coucke, P. (author), Mortier, G.R. (author)
From data collected via a large international collaborative study, we have constructed a growth chart for patients with molecularly confirmed congenital spondylo-epiphyseal dysplasia (SEDC) and other COL2A1 related dysplasias. The growth chart is based on longitudinal height measurements of 79 patients with glycine substitutions in the triple...
article 2012
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Kälin, S. (author), Amstutz, B. (author), Gastaldelli, M. (author), Wolfrum, N. (author), Boucke, K. (author), Havenga, M. (author), DiGennaro, F. (author), Liska, N. (author), Hemmi, S. (author), Greber, U.F. (author), TNO Kwaliteit van Leven (author)
Human adenovirus serotype 35 (HAdV-35; here referred to as Ad35) causes kidney and urinary tract infections and infects respiratory organs of immunocompromised individuals. Unlike other adenoviruses, Ad35 has a low seroprevalence, which makes Ad35-based vectors promising candidates for gene therapy. Ad35 utilizes CD46 and integrins as receptors...
article 2010
Searched for: subject:"Terminals"
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