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Acciani, F. (author), Frasca, P. (author), Stoorvogel, A. (author), Semsar-Kazerooni, E. (author), Heijenk, G. (author)Cooperative Adaptive Cruise Control (CACC) is nowadays a promising technique to increase highway through-put, safety and comfort for vehicles. Enabled by wireless communication, CACC allows a platoon of vehicles to achieve better performance than Adaptive Cruise Control; however, since wireless is employed, problems related to unreliability...conference paper 2018
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Pennings, H.J.M. (author), Brekelmans, M. (author), Sadler, P. (author), Claessens, L.C.A. (author), van der Want, A.C. (author), van Tartwijk, J. (author)Teacher-student relationships play a crucial role in the quality of teaching and learning. Daily interpersonal interactions in classrooms are the building blocks of teacher-student relationships. With the aim to add to insights on teaching and learning, we specifically explored interpersonal adaptation in daily interactions. Adaptation, i.e.,...article 2018
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Kuiper, S. (author), Doelman, N.J. (author), Human, J.D. (author), Saathof, R. (author), Klop, W.A. (author), Maniscalco, M.P. (author)TNO is developing Deformable Mirror (DM) technology, targeted for aberration correction in high-end Adaptive Optics (AO) applications in the field of lithography, astronomy, space and laser communication. The heart of this deformable mirror technology is a unique actuator technology based on the variable reluctance principle. The main advantages...conference paper 2018
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Remmen, F. (author), Cara, I. (author), de Gelder, E. (author), Willemsen, D.M.C. (author)Truck platooning is gaining more and more interest thanks to the benefits on improved traffic efficiency, reduced fuel consumption and emissions. To gain these benefits, it typically involves small following distances . Due to the small following distances, the cut-in manoeuvre of target vehicles becomes safety critical and requires the...conference paper 2018
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Sprung, D. (author), Sucher, E. (author), van Eijk, A.M.J. (author), Eisele, C. (author), Seiffer, D. (author), Stein, K. (author)A field trial was performed in the arid scrub area of White Sands, NM /USA in October 2017 investigating the atmospheric influence on imaging and sensor performance. In this paper we focus on the strength of optical turbulence. Optical turbulence is described by the structure function parameter of the refractive index Cn 2. It is responsible for...conference paper 2018
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Saathof, R. (author), den Breeje, R. (author), Klop, W.A. (author), Kuiper, S. (author), Doelman, N.J. (author), Pettazzi, F. (author), Vosteen, L.L.A. (author), Wildschut, J.A. (author), de Lange, T.J. (author), Moens, T.M.N. (author), Koster, S.E. (author), Gruber, J.M. (author), Spierdijk, J.P.F. (author), Kerkhof, P.J. (author), Russchenberg, T. (author), Truyens, D.C. (author), Crowcombe, W.E. (author), Human, J.D. (author), Mata Calvo, R. (author), Poliak, J. (author), Barrios, R. (author), Scalise, S. (author), Ferrario, I. (author)TNO and DLR envision optical free-space communication between ground stations and geostationary telecommunication satellites to replace the traditional RF links for the next generation of Very High Throughput Satellites. To mitigate atmospheric turbulence, an Adaptive Optics (AO) system will be used. TNO and DLR are developing breadboards to...conference paper 2018
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Lucena, A.F.P. (author), Hejazi, M. (author), Vasquez-Arroyo, E. (author), Turner, S. (author), Koberle, A.C. (author), Daenzer, K. (author), Rochedo, P.R.R. (author), Kober, T. (author), Cai, Y. (author), Beach, R.H. (author), Gernaat, D. (author), van Vuuren, D.P. (author), van der Zwaan, B.C.C. (author)This paper performs a multi-model comparison to assess strategies for adaptation to climate change impacts in hydropower generation in Brazil under two Representative Concentration Pathways. The approach used allows for evaluating the interactions between climate change mitigation and adaptation strategies under low and high impact scenarios...article 2018
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Saathof, R. (author), den Breeje, R. (author), Klop, W.A. (author), Kuiper, S. (author), Doelman, N.J. (author), Pettazzi, F. (author), Vosteen, L.L.A. (author), Truyens, D.C. (author), Crowcombe, W.E. (author), Human, J.D. (author), Ferrario, I. (author), Calvo, R.M. (author), Poliak, J. (author), Barrios, R. (author), Giggenbach, D. (author), Fuchs, C. (author), Scalise, S. (author)To overcome data rate limitations of RF communication links with satellites, TNO and DLR envision optical free-space communication feeder links for next generation high throughput satellites. This paper provides a feasibility assessment of such links and the technology needed. The main results of the link budget and the turbulence modeling of...conference paper 2018
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Podborski, D. (author), Thomas, E. (author), Hannuksela, M.M. (author), Oh, S. (author), Stockhammer, T. (author), Pham, S. (author)Virtual reality (VR) has gained a lot of attention due to market availability of consumer devices. A challenge for wider use is the ability to stream VR content to the user. This paper looks at aspects of 360° video streaming and the considerations for possible solutions. The primary focus lies on current efforts to develop standards for...article 2018
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Oprins, E.A.P.B. (author), van den Bosch, K. (author), Venrooij, W. (author)Jobs within the military and in civil society differ in character and requirements. It is assumed that differences in job types both within civil and military domains require different dimensions of adaptability competency. The present study investigates this assumption. The Dutch Adaptability Dimensions And Performance Test (D-ADAPT) was used...article 2018
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van Kooten, M.A.M. (author), Doelman, N.J. (author), Kenworthy, M. (author)In an adaptive optics (AO) system, finite time delays contribute a relatively large amount to the overall wavefront error. The temporal error, due to the time delays, adds to the speckle halo which is visible in the science plane of a high contrast imaging (HCI) instrument. The halo limits the inner working angle, preventing HCI from probing...conference paper 2018
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Ullwer, C. (author), Sprung, D. (author), van Eijk, A.M.J. (author), Gunter, W. (author), Stein, K. (author)Atmospheric turbulence impacts on the propagation of electro-optical radiation. Typical manifestations of optical turbulence are scintillation (intensity fluctuations), beam wander and (for laser systems) reduction of beam quality. For longer propagation channels, it is important to characterize the vertical and horizontal distribution ...conference paper 2018
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Sprung, D. (author), Van Eijk, A.M.J. (author), Ullwer, C. (author), Gunter, W. (author), Eisele, C. (author), Seiffer, D. (author), Sucher, E. (author), Stein, K. (author)The atmospheric influence on wave propagation was investigated during the First European South African Transmission ExpeRiment from June 2015 to February 2016. The focus in this article was set on optical turbulence, the main atmospheric factor affecting the position and strength of Laser beams, the performance of electro-optical systems and...conference paper 2018
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Radhakrishnan, V.M. (author), Keller, C.U. (author), Doelman, N.J. (author)Direct imaging of exoplanets requires overcoming the enormous contrast between the exoplanet and its host star, to distinguish the reflected light from the exoplanet, from the diffracted light of the star. Direct optimization of contrast, using nonlinear optimization techniques of the Adaptive Optics (AO) system coupled with coronagraphy, shows...conference paper 2018
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Ligthart, J. (author), Semsar-Kazerooni, E. (author), Ploeg, J. (author), Alirezaei, M. (author), Nijmeijer, H. (author)A shortcoming of many Cooperative Adaptive Cruise Control (CACC) schemes is the lack of a guarantee of safe vehicle behavior in a platoon, i.e., making sure that a vehicle does not collide with its preceding vehicle in case the latter performs a deceleration outside the operational range of the CACC system. To overcome that problem, this paper...conference paper 2018
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Turkoglu, M.O. (author), ter Haar, F.B. (author), van der Stap, N. (author)3D visual understanding of the surrounding environment is vital for successful mobile robotic tasks such as autonomous navigation or general object interaction. However, current systems have limited perceptual capabilities in the sense that they are not very well adaptable to unknown environments. Human operators, on the other hand, are experts...conference paper 2018
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Kupper, F. (author), Forrai, A. (author), Indrajuana, A. (author), Weijst, R.V.D. (author), Keulen, T.V. (author), Willems, F.T.P. (author)Accurate estimation of Brake Specific Fuel Consumption (BSFC) is required to enable on-line optimization of real-world fuel efficiency of diesel engines. This work aims to develop a BSFC estimation method which is accurate enough for an adaptive controller for on-line engine optimization, e.g., using Extremum Seeking. In this paper two different...article 2018
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van Nunen, E. (author), Verhaegh, J. (author), Silvas, E. (author), Semsar-Kazerooni, E. (author), van de Wouw, N. (author)To improve traffic throughput, Cooperative Adaptive Cruise Control (CACC) has been proposed as a solution. The usage of Vehicle-to-Vehicle (V2V) communication enables short following distances, thereby increasing road capacity and fuel reduction (especially for trucks). Control designs for CACC use the wirelessly communicated intended...conference paper 2018
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Luijten, M.A.J. (author), Eekhout, I. (author), D'Hooghe, M. (author), Uitdehaag, D.M.J. (author), Mokkink, L.B. (author)Background: Assessing arm and hand function of multiple sclerosis (MS) patients is important as impaired functioning may impact daily activities and reduce quality of life. Objective: A short-form of the Arm Function in Multiple Sclerosis Questionnaire (AMSQ), a recently developed patient-reported outcome measure containing 31 items, is...article 2018
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van der Kleij, R. (author), Hueting, T.F. (author), Schraagen, J.M.C. (author)Dynamic Positioning (DP) is a computer-controlled process to automatically keep a floating vessel at a specific position or to follow a pre-defined path (tracking) by using its own propellers and thrusters. The human supervisory controller has no direct need to constantly know what the status is of all parts of the automation and the system it...article 2018