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Raftopoulou, M. (author), Litjens, R. (author), van Mieghem, P. (author)In this paper, we focus on the link density in random geometric graphs (RGGs) with a distance-based connection function. After deriving the link density in D dimensions, we focus on the two-dimensional (2D) and three-dimensional (3D) space and show that the link density is accurately approximated by the Fréchet distribution, for any rectangular...article 2022
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Wang, X. (author), Trajanovski, S. (author), Kooij, R.E. (author), van Mieghem, P. (author)Topological characteristics of links of complex networks influence the dynamical processes executed on networks triggered by links, such as cascading failures triggered by links in power grids and epidemic spread due to link infection. The line graph transforms links in the original graph into nodes. In this paper, we investigate how graph...article 2016
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Wang, X. (author), Kooij, R.E. (author), van Mieghem, P. (author)Various real-world networks interact with and depend on each other. The design of the interconnection between interacting networks is one of the main challenges to achieve a robust interdependent network. Due to cost considerations, network providers are inclined to interconnect nodes that are geographically close. Accordingly, we propose two...article 2016
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Wang, X. (author), Koç, Y. (author), Kooij, R.E. (author), van Mieghem, P. (author)Cascading failures are one of the main reasons for blackouts in electrical power grids. Stable power supply requires a robust design of the power grid topology. Currently, the impact of the grid structure on the grid robustness is mainly assessed by purely topological metrics, that fail to capture the fundamental properties of the electrical...conference paper 2015
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Koç, Y. (author), Warnier, M. (author), van Mieghem, P. (author), Kooij, R.E. (author), Brazier, F.M.T. (author)Cascading failures are one of the main reasons for blackouts in electric power transmission grids. The economic cost of such failures is in the order of tens of billion dollars annually. The loading level of power system is a key aspect to determine the amount of the damage caused by cascading failures. Existing studies show that the blackout...article 2014
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- Wang, X. (author), Pournaras, E. (author), Kooij, R.E. (author), van Mieghem, P. (author) article 2014
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Koç, Y. (author), Warnier, M. (author), van Mieghem, P. (author), Kooij, R.E. (author), Brazier, F.M.T. (author)Cascading failures are one of the main reasons for large scale blackouts in power transmission grids. Secure electrical power supply requires, together with careful operation, a robust design of the electrical power grid topology. Currently, the impact of the topology on grid robustness is mainly assessed by purely topological approaches, that...article 2014
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Monsuur, H. (author), Kooij R.E., (author), van Mieghem, P. (author)The security environment is rapidly changing. Due to increasing dependency on complex critical communication and information systems, society as a whole, but defence organisations in particular, have to rethink, redesign and adapt their Defences to be able to confront the challenges of cyberwarfare and crime. The literature abounds with examples...bookPart 2012
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Ellens, W. (author), Spieksma, F.M. (author), van Mieghem, P. (author), Jamakovic, A. (author), Kooij, R.E. (author)This paper studies an interesting graph measure that we call the effective graph resistance. The notion of effective graph resistance is derived from the field of electric circuit analysis where it is defined as the accumulated effective resistance between all pairs of vertices. The objective of the paper is twofold. First, we survey known...article 2011
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Lu, Y. (author), Kuipers, F. (author), den Hartog, F.T.H. (author), van Mieghem, P. (author)We develop a performance model for the availability of a MobileTV service in a caching hierarchy network. The probability that bandwidth for the service is available is calculated as a function of channel popularity, the number of available channels, cache sizes, network configuration, and content viewing behavior. The system performance and the...conference paper 2011
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Wang, H. (author), Kooij, R.E. (author), van Mieghem, P. (author), TNO Informatie- en Communicatietechnologie (author)We propose a class of graphs GD(n<sub>1</sub>,n<sub>2</sub>,⋯,n <sub>D+1</sub>), containing of a chain of D+1 cliques K n<sub>1</sub>,K n <sub>2</sub>,⋯,Kn<sub>D+1</sub>, where neighboring cliques are fully-interconnected. The class of graphs has diameter D and size N=∑<sub>1≤i≤D+1</sub>n<sub>i</sub>. We prove that this class of graphs can...article 2010
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van Mieghem, P. (author), Omic, J. (author), Kooij, R.E. (author), TNO Informatie- en Communicatietechnologie (author)The influence of the network characteristics on the virus spread is analyzed in a new-the N-intertwined Markov chain-model, whose only approximation lies in the application of mean field theory. The mean field approximation is quantified in detail. The N-intertwined model has been compared with the exact 2N-state Markov model and with previously...article 2009
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Lu, Y. (author), Fallica, B. (author), Kuipers, F.A. (author), Kooij, R.E. (author), van Mieghem, P. (author), TNO Informatie- en Communicatietechnologie (author)Recently, there has been a growing interest in academic and commercial environments for live streaming using P2P technology. A number of new P2P digital Television (P2PTV) applications have emerged. Such P2PTV applications are developed with proprietary technologies. Their traffic characteristics and the Quality of Experience (QoE) provided by...article 2009
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Omić, J. (author), Kooij, R.E. (author), van Mieghem, P. (author), TNO Informatie en Communicatietechnologie (author)We examine the influence of heterogeneous curing rates for a SIS model, used for malware spreading on the Internet, information dissemination in unreliable networks, and propagation of failures in networks. The topology structures considered are the regular graph which represents the homogenous network structures and the complete bi-partite...conference paper 2009
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Lu, Y. (author), Kuipers, F. (author), Janic, M. (author), van Mieghem, P. (author), TNO Informatie- en Communicatietechnologie (author)Increased Internet speeds together with new possibilities for tailor-made television services have spurred the interest in providing television via the Internet. Several television services are readily available and both IP-layer and application-layer (P2P) technologies are used. When disregarding commercial influences, customers will choose for...bookPart 2008
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Fallica, B. (author), Lu, Y. (author), Kuipers, F. (author), Kooij, R.E. (author), van Mieghem, P. (author), TNO Informatie- en Communicatietechnologie (author)Peer-to-Peer (P2P) file sharing has become immensely popular in the Internet. Recently, there has been a growing interest in academic and commercial environments for live streaming using P2P technology. A number of new P2P digital television (P2PTV) applications have emerged. Such P2PTV applications are developed with proprietary technologies...conference paper 2008
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Agrawal, D.K. (author), Kleiberg, T. (author), Papp, S. (author), Kooij, R.E. (author), van Mieghem, P. (author), TNO Informatie- en Communicatietechnologie (author)Quality of Service (QoS) support in the current internet is indispensable because of QoS-sensitive real-time applications such as Voice-over-IP, IP-TV, video conferencing, online gaming etc. Since the introduction of the Differentiated Services (Diff-Serv) architecture there has been considerable work reported in literature on its performance...conference paper 2007
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TNO Informatie- en Communicatietechnologie (author), Omic, J.S. (author), Kooij, R.E. (author), van Mieghem, P. (author)In this paper we study the spread of viruses on the complete bi-partite graph Km,n. Using mean field theory we first show that the epidemic threshold for this type of graph satifies Tc = 1/√MN, hence, confirming previous results from literature. Next, we find an expression for the average number of infected nodes in the steady state. In addition...conference paper 2007
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Zhou, X. (author), Uijterwaal, H. (author), Kooij, R.E. (author), van Mieghem, P. (author)To provide high quality service to future Internet applications, IPv6 performance measurements are needed. However, to the best of our knowledge, IPv6 delay and loss performance evolution and their impact on applications have not been studied on a large scale. In this paper, we have analyzed more than 600 end-to-end IPv6 paths between about 26...conference paper 2006
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Jamakovic, A. (author), Kooij, R.E. (author), van Mieghem, P. (author), van Dam, E.R. (author)In this paper we study the spectral radius of a number of real-life networks. This study is motivated by the fact that the smaller the spectral radius, the higher the robustness of a network against the spread of viruses. First we study how wellknown upper bounds for the spectral radius of graphs match to the spectral radii of the social network...conference paper 2006