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Sengar, A. (author), Kuipers, J.R. (author), Van Santen, Rutger A. (author), Padding, J.T. (author)Connecting the macroscopic world of continuous fields to the microscopic world of discrete molecular events is important for understanding several phenomena occurring at physical boundaries of systems. An important example is heterogeneous catalysis, where reactions take place at active surfaces, but the effective reaction rates are...journal article 2017
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Yang, L. (author), Padding, J.T. (author), Buist, K. A. (author), Kuipers, J.R. (author)Two fluid model simulations based on our recently introduced kinetic theory of granular flow (KTGF) for rough spheres and rough walls, are validated for the first time for full three-dimensional (3D) bubbling fluidized beds. The validation is performed by comparing with experimental data from Magnetic Particle Tracking and more detailed...journal article 2017
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Çetinay Iyicil, H. (author), Soltan, Saleh (author), Kuipers, F.A. (author), Zussman, Gil (author), Van Mieghem, P.F.A. (author)In this paper, we study cascading failures in power grids under the nonlinear AC and linearized DC power flow models. We numerically compare the evolution of cascades after single line failures under the two flow models in four test networks. The cascade simulations demonstrate that the assumptions underlying the DC model (e.g., ignoring power...journal article 2017
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Alpeggiani, F. (author), Parappurath, N. (author), Verhagen, E. (author), Kuipers, L. (author)It is well known that the quasinormal modes (or resonant states) of photonic structures can be associated with the poles of the scattering matrix of the system in the complex-frequency plane. In this work, the inverse problem, i.e., the reconstruction of the scattering matrix from the knowledge of the quasinormal modes, is addressed. We develop...journal article 2017
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van den Berg, Daniël (author), Glans, Rebecca N. (author), de Koning, Dorian (author), Kuipers, F.A. (author), Lugtenburg, A.J.C. (Jochem) (author), Polachan, Kurian (author), Venkata, Prabhakar T. (author), Singh, Chandramani (author), Turkovic, B. (author), van Wijk, Bryan (author)The Tactile Internet presently constitutes a vision of an Internet over which, in addition to current communications modalities, a sense of touch can be transported. In that case, people would no longer need to be physically near the systems they operate, but could control them remotely. The main problem that needs to be solved to realize the...journal article 2017
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De, S. (author), Kuipers, J. A. M. (author), Peters, E. A. J. F. (author), Padding, J.T. (author)We investigate creeping flow of a viscoelastic fluid through a three dimensional random porous medium using computational fluid dynamics. The simulations are performed using a finite volume methodology with a staggered grid. The no slip boundary condition on the fluid-solid interface is implemented using a second order finite volume immersed...journal article 2017
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Buist, Kay A. (author), Jayaprakas, Pavithra (author), Kuipers, J.A.M. (author), Deen, Niels G. (author), Padding, J.T. (author)In granular flow operations, often particles are nonspherical. This has inspired a vast amount of research in understanding the behavior of these particles. Various models are being developed to study the hydrodynamics involving nonspherical particles. Experiments however are often limited to obtain data on the translational motion only. This...journal article 2017
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Jansen, Bart (author), Goodwin, Timothy (author), Gupta, Varun (author), Kuipers, F.A. (author), Zussman, Gil (author)WebRTC has quickly become popular as a video conferencing platform, partly due to the fact that many browsers support it. WebRTC utilizes the Google Congestion Control (GCC) algorithm to provide congestion control for realtime communications over UDP. The performance during a WebRTC call may be influenced by several factors, including the...journal article 2017
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Mahajan, V.V. (author), Nijssen, Tim M.J. (author), Fitzgerald, B. (author), Hofman, Jeroen (author), Kuipers, Hans (author), Padding, J.T. (author)Multiphase (gas-solid) flows are encountered in numerous industrial applications such as pharmaceutical, food, agricultural processing and energy generation. A coupled computational fluid dynamics (CFD) and discrete element method (DEM) approach is a popular way to study such flows at a particle scale. However, most of these studies deal with...journal article 2017
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Bizanis, Nikos (author), Kuipers, F.A. (author)The imminent arrival of the Internet of Things (IoT), which consists of a vast number of devices with heterogeneous characteristics, means that future networks need a new architecture to accommodate the expected increase in data generation. Software defined networking (SDN) and network virtualization (NV) are two technologies that promise to...journal article 2016
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Yang, S. (author), Trajanovski, S. (author), Kuipers, F.A. (author)Background Solving the shortest path and min-cut problems are key in achieving high-performance and robust communication networks. Those problems have often been studied in deterministic and uncorrelated networks both in their original formulations as well as in several constrained variants. However, in real-world networks, link weights (e.g.,...journal article 2016
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Van Adrichem, N.L.M. (author), Blenn, N. (author), Reyes-Lua, A. (author), Wang, X. (author), Wasif, M. (author), Fatturrahman, F. (author), Kuipers, F.A. (author)DNSSEC offers protection against spoofing of DNS data by providing origin authentication, ensuring data integrity and authentication of non-existence by using public-key cryptography. Although the relevance of securing a technology as crucial to the Internet as DNS is obvious, the DNSSEC implementation increases the complexity of the deployed...journal article 2015
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Jia, L. (author), Shen, S. (author), van de Bovenkamp, R. (author), Iosup, A. (author), Kuipers, F.A. (author), Epema, D.H.J. (author)Multiplayer Online Games (MOGs) like Defense of the Ancients and StarCraft II have attracted hundreds of millions of users who communicate, interact, and socialize with each other through gaming. In MOGs, rich social relationships emerge and can be used to improve gaming services such as match recommendation and game population retention, which...journal article 2015
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Ercan, O. (author), Bisschops, M.M. (author), Overkamp, W. (author), Jørgensen, T.R. (author), Rama, A.F. (author), Smid, E.J. (author), Pronk, J.T. (author), Kuipers, O.P. (author), Daran-Lapujade, P. (author), Kleerebezem, M. (author)The current knowledge of the physiology and gene expression of industrially relevant microorganisms is largely based on laboratory studies under conditions of rapid growth and high metabolic activity. However, in natural ecosystems and industrial processes, microbes frequently encounter severe calorie restriction. As a consequence, microbial...journal article 2015
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Muhammad Iqbal, M.A.F. (author), van der Ham, Jeroen (author), Kuipers, F.A. (author)Transporting Big Data requires high-speed connections between end-hosts. Research and educational networks typically are state-of-the-art networks that facilitate such high-speed user-created network connections, possibly spanning multiple domains. However, there are many different high-speed optical data plane standards and implementations, and...journal article 2015
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- Yang, S. (author), Trajanovski, S. (author), Kuipers, F.A. (author) journal article 2015
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- Trajanovski, S. (author), Kuipers, F.A. (author), Ilic, A (author), Crowcroft, J (author), Van Mieghem, P.F.A. (author) journal article 2015
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Negeri, E.O. (author), Kuipers, F.A. (author), Baken, N.H.G. (author)The electric power grid is a critical infrastructure that delivers electricity from power generation sources to consumers. At this time, renewable and distributed sources of electricity as well as new technologies that introduce large loads are significantly changing load profiles in low-voltage grids. This trend calls for reassessing the...journal article 2015
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Van de Bovenkamp, R. (author), Kuipers, F.A. (author), Van Mieghem, P.F.A. (author)When two viruses compete for healthy nodes in a simple network and both spreading rates are above the epidemic threshold, only one virus will survive. However, if we prevent the viruses from dying out, rich dynamics emerge. When both viruses are identical, one virus always dominates the other, but the dominating and dominated virus alternate. We...journal article 2014
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Trajanovski, S. (author), Kuipers, F.A. (author), Ili?, A. (author), Crowcroft, J. (author), Van Mieghem, P. (author)Due to their importance to society, communication networks should be built and operated to withstand failures.However, cost considerations make network providers less inclined to take robustness measures against failures that are unlikely to manifest, like several failures coinciding simultaneously in different geographic regions of their...journal article 2014