Searched for: subject%3A%22Flying%22
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Pantos, C. (author), Hildmann, H. (author), Valente, J. (author)
This study aims to explore the communication capabilities for video crucial applications of two commercial drones—the Parrot AR.Drone 2.0 and the Parrot Anafi—in a greenhouse environment. Experiments were conducted on Received Signal Strength (RSS), Round-Trip Time (RTT) and the throughput on 802.11n at the 2.4 GHz network. From the experiments,...
article 2023
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Comans, R.N.J. (author)
Purpose: This study evaluates the potential of biomass ash as raw clinker material and the influence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods: A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO2 ratio and burnability) are established. A large dataset was collected and the...
article 2021
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Albers, T. (author), Lazovik, E. (author), Yousefi, M.H.N. (author), Lazovik, A. (author)
Distributed data processing systems have become the standard means for big data analytics. These systems are based on processing pipelines where operations on data are performed in a chain of consecutive steps. Normally, the operations performed by these pipelines are set at design time, and any changes to their functionality require the...
article 2021
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Usmani, O.A. (author)
This document consists of a quick overview of some existing consumer compensation schemes offered by the aviation industry. This will consist of (if the information was available) a description of how the scheme works, an overview of the project types the scheme proposes, information about the scope/size of the scheme, data about costs, and...
report 2021
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Usmani, O. (author), de Wilde, H. (author), Uslu, A. (author)
An increasing number of people experiences flight shame (or ‘flygskam’ in Swedish, where the term originated). However, as of yet this has not resulted in a reduction in the number of flights. Flying currently remains the default option for (international) travel.
report 2021
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Usmani, O.A. (author), de Wilde, H. (author)
The impact of using renewable fuels means multiplying fuel cost by a factor 2-6. The aim of this document is to illustrate how large the impact of replacing fossil fuels with renewable ones is in the aviation sector.
report 2021
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de Wilde, H. (author)
Goal: Provide substantiation for the extra costs of biokerosene and synthetic kerosene, compared to kerosene from fossil origin that we use in the article on aviation on energy.nl, supported by numbers from authoritative sources.
other 2021
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Damgaard, A. (author), Comans, R.N.J. (author)
In this study, we performed a life cycle assessment of the reuse of biomass fly ash as secondary cementitious material in cement mortars as alternative to a reference landfill scenario of the ash. Since biomass ash does contain enhanced levels of elements that are of potential concern for the environment or human exposure, the performed Life...
article 2019
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Keulen, A. (author), van Zomeren, A. (author), Dijkstra, J.J. (author)
This study explores the leaching of oxyanionic metalloid species (As, Mo, Se, V and Cr) from alkali activated slag-fly ash materials (AAM), dependent on various mixture parameters i.e., activator molarity, slag-fly ash precursor/binder compositions, liquid to binder ratio, curing time and strength. The analyses focusses on the leaching of...
article 2018
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Lazovik, E. (author), Medema, M. (author), Albers, T. (author), Langius, E.A.F. (author), Lazovik, A. (author)
Distributed data processing systems are the standard means for large-scale data analysis in the Big Data field. These systems are based on processing pipelines where the processing is done via a composition of multiple elements or steps. In current distributed data processing systems, the code and parameters that create the pipeline are set at...
conference paper 2017
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Valcke, S.L.A. (author), Pipilikaki, P. (author), Fischer, H.R. (author), Verkuijlen, M.H.W. (author), Eck, E.R.H. (author)
Geopolymers are systems of inorganic binders that can be used for sustainable, cementless concrete and are formed by alkali activation of an aluminium–silicate precursor (often secondary resources like fly ash or slag). The type of aluminium– silicate precursor and its potential variations within one batch may influence geopolymer performance....
article 2014
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Brodecki, M. (author), Subbarao, K. (author), Chu, Q.P. (author)
Emergent behavior of a formation flight control system based on an advanced extremum seeking algorithm is investigated. The control system was implemented on a nonlinear high fidelity aircraft model and combined with a wake vortex model in order to accurately represent the aerodynamic coupling experienced by members of a formation. The desired...
conference paper 2013
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Brodecki, M. (author), Subbarao, K. (author), Chu, Q.P. (author)
A formation flight control system has been designed that addresses the unique environment encountered by aircraft flying in formation and in the upwash of the leading aircraft. In order to test the control system a simulation environment has been created that adequately represents the aerodynamic coupling effects between aircraft flying in...
conference paper 2013
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Gill, E. (author), Maessen, D. (author), Laan, E.C. (author), Kraft, S. (author), Zheng, G. (author), TNO Industrie en Techniek (author)
Large current uncertainties in the characteristics of aerosols in the Earth's atmosphere preclude meaningful climate model evaluation. The FAST mission will contribute to the characterization of aerosols and their relation to climate change through a synoptic evaluation of local, regional and global aerosol data and altitude profiles of the...
article 2010
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TNO Defensie en Veiligheid (author), van Diggelen, J. (author), Janssen, J. (author), Mioch, T. (author)
This paper describes an integrated design and implementation framework for cognitive models in complex task environments. We propose a task- and humancentered development methodology for deriving the cognitive models, and present a goal-based framework for implementing them. We illustrate our approach by modelling cognitive lockup as an error...
conference paper 2010
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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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de Haas, E.M. (author), Kraak, M.H.S. (author), TNO Kwaliteit van Leven (author)
The absence of species in polluted sediments does not necessarily imply exclusion due to toxicity. Other factors, like for instance food availability and oxygen content, could also partly cause their absence. Hence, knowledge of the (combinations of) factors acting on individual organisms is essential in order to understand how populations can...
article 2008
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Verlaan, A.L. (author), Cabral, A. (author), Abreu, M. (author), Witte, S. (author), Flatscher, R. (author), TNO Industrie en Techniek (author)
Femto-Second based Laser (FSL) systems enable a large range of concepts for distance measurement that can easily be used for formation flying. ESA has acknowledged this by initiating two parallel studies (HAALDM) to investigate the full range of possibilities. TNO leads one of the two study teams, as manufacturer of space optical systems. To...
conference paper 2008
document
Verlaan, A.L. (author), Cuylle, S.H. (author), TNO Industrie en Techniek (author)
Formation flying of spacecraft nowadays is acknowledged to be an important technology for many future space missions. TNO underlines the importance and has therefore designed and tested a general use sensor system that is modular and can be used and adapted to the specific needs of a variety of missions. The sensor system is designed to be...
conference paper 2008
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Heiri, O. (author), Cremer, H. (author), Engels, S. (author), Hoek, W.Z. (author), Peeters, W. (author), Lotter, A.F. (author), TNO Bouw en Ondergrond (author)
Lateglacial environments at Hijkermeer, northwest Netherlands, were reconstructed by means of chironomid, diatom and pollen analyses. Diatom assemblages indicate that Hijkermeer was a shallow, oligo- to mesotrophic lake during this period. Pollen assemblages reflect the typical northwest European Lateglacial vegetation development and provide an...
article 2007
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