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Frijlink, M. (author), Wapenaar, C.P.A. (author)One-way wave equations conveniently describe wave propagation in media with discontinuous and/or rapid variations in one direction, but with smooth and slow variations in the complementary transverse directions. In the past, reciprocity theorems have been developed in terms of one-way wave fields. The boundaries of the integration volumes and...journal article 2010
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Gonzalez, R.A. (author)Crisis response efforts often require coordinating a previously unknown adhocracy of agencies under time pressure. While current technologies that support coordination are successful for well-defined static process descriptions, they may fall short in the face of more complex and unpredictable scenarios, such as a crisis or emergency. Using...doctoral thesis 2010
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De Wit, A.J. (author), Van Keulen, A. (author)Multi-level optimization and multi-disciplinary optimization are areas of research that are concerned with developing efficient analysis and optimization techniques for complex systems that are made up of coupled elements (components). Within the field of multilevel optimization and multi-disciplinary optimization a large number of techniques...conference paper 2010
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He, H. (author)Physical particle packing is becoming a hot topic in concrete technology as more and more types of granular materials are used in concrete either for ecological or for engineering purposes. Although various analytical methods have been developed for optimum mixture design, comprehensive information on particle packing properties is still missing...doctoral thesis 2010
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Yuan, Y. (author), Daamen, W. (author), Hoogendoorn, S. (author), Vrancken, D. (author)The steadily increasing numbers and lengths of traffic jams on freeways have led to the application of Dynamic Traffic Management (DTM) measures all over the world. Ramp metering control has proven to be one of the most efficient means to reduce freeway congestion. Currently, it is expected that integrated and coordinated application of DTM...conference paper 2010
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De Rooij, J.P.G. (author)The aim of this dissertation was to study the little examined, yet important issue of leadership for distributed teams. Distributed teams are defined as: “teams of which members are geographically distributed and are therefore working predominantly via mediated communication means on an interdependent task and in realizing a joint goal” (adapted...doctoral thesis 2009
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De Wit, A.J. (author)Complex systems, such as those encountered in aerospace engineering, can typically be considered as a hierarchy of individual coupled elements. This hierarchy is reflected in the analysis techniques that are used to analyze the physcial characteristics of the system. Consequently, a hierarchy of coupled models is to be used, accounting for...doctoral thesis 2009
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Gonzalez, R.A. (author)This paper presents a crisis response simulation model architecture combining a discrete-event simulation (DES) environment for a crisis scenario with an agent-based model of the response organization. In multi-agent systems (MAS) as a computational organization, agents are modeled and implemented separately from the environmental model. We...conference paper 2009
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Janssen, M. (author), Lee, J. (author), Bharosa, N. (author), Cresswell, A. (author)Multi-agency disaster management requires collaboration among geographically distributed public and private organizations to enable a rapid and effective response to an unexpected event. Many disaster management systems often lack the capability to cope with the complexity and uncertainty. In this introduction to the special issues on advances...journal article 2009
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Bharosa, N. (author), Lee, J. (author), Janssen, M. (author)Although various scholars have researched issues regarding disaster management, few have studied the sharing and coordinating of information during disasters. Not much empirical data is available in this field and there is sparse insight into the factors that may impede or facilitate information sharing and coordination among stakeholders. In...journal article 2009
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Ter Mors, A.W. (author), Yadati, C. (author), Witteveen, C. (author), Zhang, Y. (author)We consider a multi-agent planning problem as a set of activities that has to be planned by several autonomous agents. In general, due to the possible dependencies between the agents’ activities or interactions during execution of those activities, allowing agents to plan individually may lead to a very inefficient or even infeasible solution to...journal article 2009
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Hollenstein, K. (author), Comellas-Bigler, M. (author), Bevers, L.E. (author), Feiters, M.C. (author), Meyer-Klaucke, W. (author), Hagedoorn, P.L. (author), Locher, K.P. (author)Bacteria and archaea import molybdenum and tungsten from the environment in the form of the oxyanions molybdate (MoO4 2?) and tungstate (WO4 2?). These substrates are captured by an external, high-affinity binding protein, and delivered to ATP binding cassette transporters, which move them across the cell membrane. We have recently reported a...journal article 2009
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Klievink, B. (author), Janssen, M. (author)Joining up remains a high priority on the e-government agenda and requires extensive transformation. Stage models are predictable patterns which exist in the growth of organizations and unfold as discrete time periods that result in discontinuity and can help e-government development towards joined-up government. Although stage models may be...journal article 2009
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Blaas, J. (author), Botha, C.P. (author), Post, F.H. (author)Parallel coordinate plots (PCPs) are commonly used in information visualization to provide insight into multi-variate data. These plots help to spot correlations between variables. PCPs have been successfully applied to unstructured datasets up to a few millions of points. In this paper, we present techniques to enhance the usability of PCPs for...journal article 2008
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D'Ariano, A. (author)Traffic controllers monitor railway traffic sequencing train movements and setting routes with the aim of ensuring smooth train behaviour and limiting as much as existing delays. Due to the strict time limit available for computing a new timetable during operations, which so far is rather infeasible by using existing tools, railway traffic...doctoral thesis 2008
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Van Katwijk, R.T. (author)The objective of this thesis is to create a distributed, multi-agent, approach to traffic control. This PhD thesis' focus is on the control of a network instrumented by traffic signals.A thorough literature study has been performed, reviewing the current state of the art in traffic signal control. On the basis of this literature survey, a...doctoral thesis 2008
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- Steenhuisen, J.R. (author), Witteveen, C. (author) conference paper 2007
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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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- Chmarra, M.K. (author), Kolkman, W. (author), Jansen, F.W. (author), Grimbergen, C.A. (author), Dankelman, J. (author) journal article 2007
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- Valk, J.M. (author) doctoral thesis 2005