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Durmisevic, S. (author), Sariyildiz, I.S. (author), Ciftcioglu, O. (author)
conference paper 2007
document
De Weerdt, M.M. (author), Zhang, Y. (author), Klos, T. (author)
This paper proposes a new variant of the task allocation problem, where the agents are connected in a social network and tasks arrive at the agents distributed over the network. We show that the complexity of this problem remains NPhard. Moreover, it is not approximable within some factor. We develop an algorithm based on the contract-net...
conference paper 2007
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Verwer, S.E. (author), De Weerdt, M.M. (author), Witteveen, C. (author)
We describe an algorithm for learning simple timed automata, known as real-time automata. The transitions of real-time automata can have a temporal constraint on the time of occurrence of the current symbol relative to the previous symbol. The learning algorithm is similar to the redblue fringe state-merging algorithm for the problem of learning...
conference paper 2007
document
Steenhuisen, J.R. (author), De Weerdt, M.M. (author), Witteveen, C. (author)
In crisis response, hierarchical organizations are being replaced by dynamic assemblies of autonomous agents that promise more agility. However, these autonomous agents might cause a decrease in effectiveness when individually constructed plans for moderately-coupled tasks are not jointly feasible. Existing coordination techniques can be applied...
conference paper 2007
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Slysz, W. (author), Wegrzecki, M. (author), Bar, J. (author), Grabiec, P. (author), Gorska, M. (author), Reiger, E. (author), Dorenbos, S. (author), Zwiller, V. (author), Milostnaya, I. (author), Minaeva, O. (author)
We have fabricated fiber-coupled superconducting single-photon detectors (SSPDs), designed for quantum-correlationtype experiments. The SSPDs are nanostructured (~100-nm wide and 4-nm thick) NbN superconducting meandering stripes, operated in the 2 to 4.2 K temperature range, and known for ultrafast and efficient detection of visible to...
conference paper 2007
document
Zevenbergen, J.A. (author), Ploeger, H.D. (author)
conference paper 2007
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Zevenbergen, J.A. (author)
conference paper 2007
document
Ploeger, H.D. (author)
conference paper 2007
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Ploeger, H.D. (author)
conference paper 2007
document
Van der Hofstad, R. (author), Hooghiemstra, G. (author), Van Mieghem, P. (author)
The minimal weight of the shortest path tree in a complete graph with independent and exponential (mean 1) random link weights, is shown to converge to a Gaussian distribution. We prove a conditional central limit theorem and show that the condition holds with probability converging to 1.
conference paper 2007
document
Tadema, J. (author), Theunissen, E. (author), Koeners, J. (author)
The guidance information that is available to the UAV operator typically suffers from limitations of data update rate and system latency. Even when using a flight director command display, the manual control task is considerably more difficult compared to piloting a manned aircraft. Results from earlier research into perspective guidance...
conference paper 2007
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Peters, R.J.M. (author), Marquering, H.A. (author), Dogan, H. (author), Hendriks, E.A. (author), De Roos, A. (author), Reiber, J.H.C. (author), Stoel, B.C. (author)
Contrast-enhanced CT Angiography has become an accepted diagnostic tool for detecting Pulmonary Embolism (PE). The CT obstruction index proposed by Qanadli, which is based on the number of obstructed arterial segments, enables the quantification of PE severity. Because the required manual identification of twenty arterial segments is time...
conference paper 2007
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De Breuker, R. (author), Abdalla, M. (author), Gürdal, Z. (author), Lindner, D. (author)
Aircraft are often confronted with distinct circumstances during different parts of their mission. Ideally the aircraft should fly optimally in terms of aerodynamic performance and other criteria in each one of these mission requirements. This requires in principle as many different aircraft configurations as there are flight conditions, so...
conference paper 2007
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Donnell, K.O. (author), Schober, S. (author), Stolk, M. (author), Marzocca, P. (author), De Breuker, R. (author), Abdalla, M. (author), Nicolini, E. (author), Gürdal, Z. (author)
This paper discusses modeling, simulations and experimental aspects of active aeroelastic control on aircraft wings by using Synthetic Jet Actuators (SJAs). SJAs, a particular class of zero-net mass-flux actuators, have shown very promising results in numerous aeronautical applications, such as boundary layer control and delay of flow separation...
conference paper 2007
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Melkert, J. (author), Van Wee, B. (author)
Since the year 2000 the Netherlands are using a new guideline for assessing the costs and benefits of transport systems. This guideline has been used several times now to assess transport systems using existing transport modes like trains. This paper reports on the first time this guideline was used to assess an innovative transport concept, the...
conference paper 2007
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Negenborn, R.R. (author), De Schutter, B. (author), Hellendoorn, J. (author)
We discuss an extension of a scheme recently proposed for multi-agent control of large-scale networks, like power networks, road traffic networks, water networks, etc. The original scheme uses serial sequences of agent interactions that under some assumptions make agents locally choose actions that are globally optimal. However, some weaknesses...
conference paper 2007
document
Langelaar, M. (author), Van Keulen, F. (author)
This article illustrates the opportunities that combining computational modeling and systematic design optimization techniques offer to facilitate the design process of shape memory alloy (SMA) structures. Focus is on shape memory behavior due to the R-phase transformation in Ni-Ti, for which a dedicated constitutive model is formulated. In this...
conference paper 2007
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Barrett, R. (author), Vos, R. (author), De Breuker, R. (author)
This paper describes a new class of flight control actuators using Post-Buckled Precompressed (PBP) piezoelectric elements to provide much improved actuator performance. These PBP actuator elements are modeled using basic large deflection Euler-beam estimations accounting for laminated plate effects. The deflection estimations are then coupled...
conference paper 2007
document
Grigorescu, A.E. (author), Van der Krogt, M. (author), Hagen, C.W. (author)
Isolated dots and lines with 6 nm width were written in 20 nm thick Hydrogen silsesquioxane (HSQ) layers on silicon substrates, using 100 keV electron beam lithography. The main factors that might limit the resolution, i.e. beam size, writing strategy, resist material, electron dose, development process, are discussed. We demonstrate that, by...
conference paper 2007
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Blaas, J. (author), Botha, C.P. (author), Majoie, C. (author), Nederveen, A. (author), Vos, F.M. (author), Post, F.H. (author)
The surgical removal of brain tumors can lead to functional impairment. Therefore it is crucial to minimize the damage to important functional areas during surgery. These areas can be mapped before surgery by using functional MRI. However, functional impairment is not only caused by damage to these areas themselves. It is also caused by damage...
conference paper 2007
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