Searched for: department:"Architecture"
(1 - 16 of 16)
document
Wang, X. (author), Koc, 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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Wang, X. (author), Koç, Y. (author), Derrible, S. (author), Nasir Ahmad, Sk. (author), Kooij, R.E. (author)
Metros (heavy rail transit systems) are integral parts of urban transportation systems. Failures in their operations can have serious impacts on urban mobility, and measuring their robustness is therefore critical. Moreover, as physical networks, metros can be viewed as network topological entities, and as such they possess measurable network...
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 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...
journal article 2014
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Wang, H. (author), Kooij, R.E. (author), Van Mieghem, P. (author)
We propose a class of graphs G?D(n1, n2, ..., nD+1), containing of a chain of D+1 cliques Kn1 , Kn2 , ..., KnD+1, where neighboring cliques are fully-interconnected. The class of graphs has diameter D and size N = ? 1?i?D+1ni. We prove that this class of graphs can achieve the maximal number of links, the minimum average hopcount, and more...
journal article 2010
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Kuipers, F. (author), Kooij, R. (author), De Vleeschauwer, D. (author), Brunnström, K. (author)
Quality of Experience (QoE) relates to how users perceive the quality of an application. To capture such a subjective measure, either by subjective tests or via objective tools, is an art on its own. Given the importance of measuring users’ satisfaction to service providers, research on QoE took flight in recent years. In this paper we present...
conference paper 2010
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Brummelink, M.L. (author), Frantzeskaki, N. (author), Klaassen, R.G. (author), Blom, E.M. (author), Kooij, R.E. (author), Kroesen, J.O. (author), Stadler, D.I. (author), Van den Boogaard, M.E.D. (author)
Delft University of Technology (DUT) is becoming more and more an international community. Since lectures on master level are all conducted in English, the numbers of students from foreign countries attending DUT are rising and international cooperation within educational projects is a necessity. To prepare educators for the continuing...
conference paper 2009
document
Balch, C. (author), Kooij, R. (author), Leendertse, M. (author)
Education is a key ingredient of any knowledge-based society, and ICT will be a key enabling factor to cope with the new strains on our education system. Recently TNO, the Dutch Organisation for Applied Scientific Research, experimented with different existing ICT technologies in a real-life primary classroom. Our ICT for education project had...
conference paper 2009
document
Kooij, R.E. (author), Schumm, P. (author), Scoglio, C. (author), Youssef, M. (author)
The robustness of a network is depending on the type of attack we are considering. In this paper we focus on the spread of viruses on networks. It is common practice to use the epidemic threshold as a measure for robustness. Because the epidemic threshold is inversely proportional to the largest eigenvalue of the adjacency matrix, it seems easy...
conference paper 2009
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Omic, J.S. (author), Kooij, R.E. (author), Van Mieghem, P. (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
document
Godana, B.E. (author), Kooij, R.E. (author), Ahmed, O.K. (author)
Nowadays various digital television services are available. However, the user of these services experiences longer delays than the traditional analog TV while switching from channel to channel. The digital TV operator usually displays a black screen with the channel number during zapping. However, it could be interesting for the TV viewer, if...
conference paper 2009
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Van Mieghem, P. (author), Omic, J. (author), Kooij, R. (author)
journal article 2009
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Kooij, R.E. (author), Nicolai, F. (author), Ahmed, O.K. (author), Brunnström, K. (author)
In an earlier paper we showed, that perceived quality of channel zapping is related to the perceived quality of download time of web browsing, as suggested by ITU-T Rec.G.1030. We showed this by performing subjective tests resulting in an excellent fit with a 0.99 correlation. This was what we call a lean forward experiment and gave the rule of...
conference paper 2009
document
Agrawal, D.K. (author), Kleiberg, T. (author), Papp, S. (author), Kooij, R.E. (author), Van Mieghem, P. (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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Degrande, N. (author), De Vleeschauer, D. (author), Kooij, R.E. (author), Mandjes, M.R.H. (author)
In First Person Shooter (FPS) games the Round Trip Time (RTT), i.e., the sum of the network delay from client to server and the network delay from server to client, impacts the gamer’s performance considerably. Game client software usually has a built-in process to measure this RTT (also referred to as ping time), and therefore gamers do not...
conference paper 2006
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Kooij, R.E. (author), Jamakovic, A. (author), Van Kesteren, F. (author), De Koning, T.C.M. (author), Theisler, I.B. (author), Veldhoven, P. (author)
In de zomer van 2008, tijdens het Europees Kampioenschap voetbal in Zwitserland en Oostenrijk, zullen weer miljoenen mensen de verrichtingen van het Nederlands elftal op de voet volgen. Ondanks het feit dat voetbal razend populair is, bestaat er vanuit de wetenschappelijke wereld relatief weinig interesse voor voetbal. In dit artikel bestuderen...
journal article
document
Fallica, B. (author), Lu, Y. (author), Kuipers, F.A. (author), Kooij, R. (author), Van Mieghem, P. (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 enviornments 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
Searched for: department:"Architecture"
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