Searched for: subject%3A%22Response%255C%2BTime%22
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Hussain, I. (author), Awan, M.A. (author), Souto, P.F. (author), Bletsas, K. (author), Akesson, B. (author), Tovar, E. (author)
The well-known model of Vestal aims to avoid excessive pessimism in the quantification of the processing requirements of mixed-criticality systems, while still guaranteeing the timeliness of higher-criticality functions. This can bring important savings in system costs, and indirectly help meet size, weight and power constraints. This efficiency...
article 2020
document
Hussain, I. (author), Bletsas, K. (author), Awan, M.A. (author), Akesson, B. (author), Souto, P.F. (author), Tovar, E. (author)
The well-known model of Vestal aims to avoid excessive pessimism in the quantification of the processing requirements of mixed-criticality systems, while still guaranteeing the timeliness of higher-criticality functions. This can bring important savings in system costs, and indirectly help meet size, weight and power constraints. This efficiency...
conference paper 2019
document
Zhang, B. (author), Wilschut, E.S. (author), Willemsen, D.M.C. (author), Martens, M.H. (author)
Automated truck platooning is getting an increasing interest for its potentially beneficial effects on fuel consumption, driver workload, traffic flow efficiency, and safety. Nevertheless, one major challenge lies in the safe and comfortable transitions of control from the automated system back to the human drivers, especially when they have...
article 2019
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Zhang, B. (author), Wilschut, E.S. (author), Willemsen, D.M.C. (author), Alkim, T. (author), Martens, M.H. (author)
Automated platooning of trucks has its beneficial effects on energy saving and traffic flow efficiency. The vehicles in a platoon, however, need to maintain an extremely short headway to achieve these goals, which will result in a heavily blocked front view for the driver in a following truck. Monitoring surrounding traffic environment and...
conference paper 2018
document
Ara, H.A. (author), Geilen, M. (author), Behrouzian, A. (author), Basten, A.A. (author)
In multi-media applications, bufers represent storage spaces that are used to store the data communicated between diferent tasks in the application, and throughput refers to the rate at which output data is produced by the application. The capacities of the bufers inluence the throughput, by altering the waiting times for tasks that need to read...
conference paper 2018
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Wopereis, S. (author), Stroeve, J.H.M. (author), Stafleu, A. (author), Bakker, G.C.M. (author), Burggraaf, J. (author), van Erk, M.J. (author), Pellis, L. (author), Boessen, R. (author), Kardinaal, A.A.F. (author), van Ommen, B. (author)
Background: A key feature of metabolic health is the ability to adapt upon dietary perturbations. Recently, it was shown that metabolic challenge tests in combination with the new generation biomarkers allow the simultaneous quantification of major metabolic health processes. Currently, applied challenge tests are largely non-standardized. A...
article 2017
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Van Den Berg, Freek (author), Hooman, Jozef (author), Hartmanns, Arnd (author), Haverkort, Boudewijn R. (author), Remke, Anne (author)
System designers need to have insight in the response times of service systems to see if they meet performance requirements. We present a high-level evaluation technique to obtain the distribution of services completion times. It is based on a high-level domain-specific language that hides the underlying technicalities from the system designer....
bookPart 2015
document
Fox, J.P. (author), Klein Entink, R. (author), Timmers, C. (author)
The present study concerns a Dutch computer-based assessment, which includes an assessment process about information literacy and a feedback process for students. The assessment is concerned with the measurement of skills in information literacy and the feedback process with item-based support to improve student learning. To analyze students'...
article 2014
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Brouwer, A.M. (author), Hogervorst, M.A. (author), Holewijn, M. (author), van Erp, J.B.F. (author)
Learning to master a task is expected to be accompanied by a decrease in effort during task execution. We examine the possibility to monitor learning using physiological measures that have been reported to reflect effort or workload. Thirty-five participants performed different difficulty levels of the n-back task while a range of physiological...
article 2014
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Živković, M. (author), Bosman, J.W. (author), van den Berg, H. (author), van der Mei, R. (author), Meeuwissen, H.B. (author), Núñez-Queija, R. (author)
We investigate dynamic decision mechanisms for composite web services maximizing the expected revenue for the providers of composite services. A composite web service is represented by a (sequential) workflow, and for each task within this workflow, a number of service alternatives may be available. These alternatives offer the same...
conference paper 2012
document
Worm, D.T.H. (author), Živković, M. (author), van den Berg, J.L. (author), van der Mei, R. (author)
Service composition is one of the major approaches in service oriented architecture (SOA) based systems. Due to the inherent stochastic nature of services execution environment the issue of composite service quality assurance within SOA is a very challenging one. Such heterogeneous environment requires dynamic, run-time composition of services....
conference paper 2012
document
Zivkovic, M. (author), Bosman, J.W. (author), van den Berg, J.L. (author), van der Mei, R.D. (author), Meeuwissen, H.B. (author), Nunez-Queija, R. (author)
In this paper we investigate sequential decision mechanisms for composite web services. After executing each sub-service within a sequential workflow, decisions are made whether to terminate or continue the execution of the workflow. These decisions are based on observed response times, expected rewards, and typical Service Level Agreement...
conference paper 2011
document
Streefkerk, J.W. (author)
The main argument in this thesis is that mobile technology has to adapt information presentation to the mobile use context and Human Factors (attention, workload and individual characteristics). This will provide better support for work in these domains than non-adaptive systems. We expect such context-aware mobile support (CAMS) systems to...
doctoral thesis 2011
document
Kooij, R.E. (author), van der Mei, R.D. (author), Yang, R. (author), TNO Informatie- en Communicatietechnologie (author)
Performance modeling of the transport control protocol (TCP) has received a lot of attention over the past few years. The most commonly quoted results are approximate formulas for TCP throughput (Padhye et al. (2000) [1]) and document download times (Cardwell et al. (2000) [2]) which are used for dimensioning of IP networks. However, the...
article 2010
document
Streefkerk, J.W. (author), van Esch-Bussemakers, M. (author), Neerincx, M. (author)
Motivation - Automated task allocation systems are prone to errors (e.g. incorrect advice) due to context events. Empirical assessment is needed of how the costs of incorrect task allocation advice relate to the benefits. Research approach - Claims regarding benefits and costs are tested in a team surveillance task in a synthetic task...
conference paper 2010
document
de Vries, S.C. (author), van Erp, J.B.F. (author), Kiefer, R.J. (author), TNO Defensie en Veiligheid (author)
This laboratory study examined the possibility of using a car seat instrumented with tactile display elements (tactors) to communicate directional information to a driver. A car seat fitted with an 8 by 8 matrix of tactors embedded in the seat pan was used to code eight different directions.Localization performance (speed and accuracy) was...
article 2009
document
Offermans, P. (author), Tong, H.D. (author), van Rijn, C.J.M. (author), Merken, P. (author), Brongersma, S.H. (author), Crego-Calama, M. (author), TNO Industrie en Techniek (author)
Palladium nanowires were fabricated on silicon substrates using conventional microfabrication techniques. Sensors based on such nanowires show a reversible response to hydrogen concentrations as low as 27 ppm with response times varying from 5 s (H2 concentrations >20%) to 30 s (H2 concentrations <100 ppm) at room temperature. The response times...
article 2009
document
TNO Defensie en Veiligheid (author), Toet, A. (author), Groen, E.l. (author), Oosterbeek, M.T.J. (author), Hooge, I.T.C. (author)
We tested the saliency of a single vibrotractile target (T) among 2 to 7 nontargets (N), presented by 8 tactors that were equally distributed over a horizontal band around the torso. Targets and nontargets had different pulse duration, but the same activation period and no onset asynchrony. T-N similarity was varied by changing the difference...
conference paper 2008
document
Martens, M.H. (author), Fox, M. (author), TNO Defensie en Veiligheid (author)
The present study shows that repeated exposure to a road environment changes eye movement behaviour. In addition, repeated exposure may result in inadequate responses to unexpected changes in the road environment. Participants drove a low-cost simulator while their eye movements were recorded. With repeated exposure participants’ glances at...
article 2007
document
Martens, M.H. (author), Fox, M. (author), TNO Defensie en Veiligheid (author)
Fixation times are known to decrease after multiple exposures to the same road in simulated environments. The present study investigates whether this also holds for real driving and for watching a video, which was taped during driving (while simulating steering and braking). It appeared that the fixation times for traffic signs, information...
article 2007
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