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Vass, Balazs (author), Tapolcai, János (author), Heszberger, Zalan (author), Biro, Jozsef (author), Hay, David (author), Kuipers, F.A. (author), Oostenbrink, J. (author), Valentini, Alessandro (author), Ronyai, Lajos (author)To evaluate the expected availability of a backbone network service, the administrator should consider all possible failure scenarios under the specific service availability model stipulated in the corresponding service-level agreement. Given the increase in natural disasters and malicious attacks with geographically extensive impact,...journal article 2021
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Maduro, L.A. (author), Noordam, M.L. (author), Bolhuis, M. (author), Kuipers, L. (author), Conesa Boj, S. (author)The fabrication of 2D materials, such as transition metal dichalcogenides (TMDs), in geometries beyond the standard platelet-like configuration exhibits significant challenges which severely limit the range of available morphologies. These challenges arise due to the anisotropic character of their bonding van der Waals out-of-plane while...journal article 2021
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Díaz-Escobar, Evelyn (author), Bauer, T.A. (author), Pinilla-Cienfuegos, Elena (author), Barreda, Ángela I. (author), Griol, Amadeu (author), Kuipers, L. (author), Martínez, Alejandro (author)High-index nanoparticles are known to support radiationless states called anapoles, where dipolar and toroidal moments interfere to inhibit scattering to the far field. In order to exploit the striking properties arising from these interference conditions in photonic integrated circuits, the particles must be driven in-plane via integrated...journal article 2021
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Komen, I. (author), van Heijst, S.E. (author), Conesa Boj, S. (author), Kuipers, L. (author)Due to their intriguing optical properties, including stable and chiral excitons, two-dimensional transition metal dichalcogenides (2D-TMDs) hold the promise of applications in nanophotonics. Chemical vapor deposition (CVD) techniques offer a platform to fabricate and design nanostructures with diverse geometries. However, the more exotic the...journal article 2021
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Noordam, M.L. (author), Hernandez Rueda, F.J. (author), Talsma, L. Y. (author), Kuipers, L. (author)Nanostructured gratings in a metal surface can highly enhance nonlinear optical processes. The geometrical parameters that characterize a grating can be optimized to achieve intense near-fields, which in turn enhance the nonlinear optical signals. For a nonlinear process that involves multiple frequencies, like four-wave mixing (FWM), the...journal article 2020
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Hornus, Samuel (author), Kuipers, T. (author), Devillers, Olivier (author), Teillaud, Monique (author), Martínez, Jonàs (author), Glisse, Marc (author), Lazard, Sylvain (author), Lefebvre, Sylvain (author)In most layered additive manufacturing processes, a tool solidifies or deposits material while following pre-planned trajectories to form solid beads. Many interesting problems arise in this context, among which one concerns the planning of trajectories for filling a planar shape as densely as possible. This is the problem we tackle in the...journal article 2020
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Mema, I. (author), Buist, Kay A. (author), Kuipers, J. A.M. (author), Padding, J.T. (author)In biomass processing fluidized beds are used to process granular materials where particles typically possess elongated shapes. However, for simplicity, in computer simulations particles are often considered spherical, even though elongated particles experience more complex particle–particle interactions as well as different hydrodynamic...journal article 2020
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Oostenbrink, J. (author), Kuipers, F.A. (author)By targeting communication and power networks, malicious actors can significantly disrupt our society. As networks are more vulnerable after a natural disaster, this moment of weakness may be exploited to disrupt the network even further. However, the potential impact and mitigation of such a follow-up attack has yet to be studied.<br/><br/>In...journal article 2020
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Kamath, S. (author), Masterov, M. V. (author), Padding, J.T. (author), Buist, K. A. (author), Baltussen, M. W. (author), Kuipers, J. A.M. (author)A parallel and scalable stochastic Direct Simulation Monte Carlo (DSMC) method applied to large-scale dense bubbly flows is reported in this paper. The DSMC method is applied to speed up the bubble-bubble collision handling relative to the Discrete Bubble Model proposed by Darmana et al. (2006) [1]. The DSMC algorithm has been modified and...journal article 2020
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Parappurath, Nikhil (author), Alpeggiani, F. (author), Kuipers, L. (author), Verhagen, Ewold (author)Topological protection in photonics offers new prospects for guiding and manipulating classical and quantum information. The mechanism of spin-orbit coupling promises the emergence of edge states that are helical, exhibiting unidirectional propagation that is topologically protected against back scattering. We directly observe the topological...journal article 2020
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Kuipers, T. (author), Doubrovski, E.L. (author), Wu, J. (author), Wang, C.C. (author)3D printing techniques such as Fused Deposition Modeling (FDM) have enabled the fabrication of complex geometry quickly and cheaply. Objects are produced by filling (a portion of) the 2D polygons of consecutive layers with contour-parallel extrusion toolpaths. Uniform width toolpaths consisting of inward offsets from the outline polygons...journal article 2020
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Gong, S. (author), Komen, I. (author), Alpeggiani, F. (author), Kuipers, L. (author)Valley pseudospin has emerged as a good quantum number to encode information, analogous to spin in spintronics. Two-dimensional transition metal dichalcogenides (2D TMDCs) recently attracted enormous attention for their easy access to the valley pseudospin through valley-dependent optical transitions. Different ways have been reported to read...journal article 2020
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Leeuwis, Anna E. (author), Hooghiemstra, Astrid M. (author), Bron, Esther E. (author), Kuipers, Sanne (author), Oudeman, Eline A. (author), Kalay, Tugba (author), Niessen, W.J. (author)Introduction: We examined the role of hemodynamic dysfunction in cognition by relating cerebral blood flow (CBF), measured with arterial spin labeling (ASL), to cognitive functioning, in patients with heart failure (HF), carotid occlusive disease (COD), and patients with cognitive complaints and vascular brain injury on magnetic resonance...journal article 2020
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Bolhuis, M. (author), Hernandez Rueda, F.J. (author), van Heijst, S.E. (author), Tinoco Rivas, M. (author), Kuipers, L. (author), Conesa Boj, S. (author)Transition metal dichalcogenides such as MoS2 represent promising candidates for building blocks of ultra-thin nanophotonic devices. For such applications, vertically-oriented MoS2 (v-MoS2) nanosheets could be advantageous as compared to conventional horizontal MoS2 (h-MoS2) given that their inherent broken symmetry would favor an enhanced...journal article 2020
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Alves, R.C.A. (author), Borges Margi, Cintia (author), Kuipers, F.A. (author)Low-power wireless networks are an integral part of the Internet of Things, composed of resource-constrained devices harvesting ambient information.<br/>The appearance of unidirectional links is characteristic of low power wireless networking due to physical effects, device heterogeneity and manufacturing imperfections.<br/>Despite the...journal article 2020
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Hesselman, Cristian (author), Grosso, Paola (author), Holz, Ralph (author), Kuipers, F.A. (author), Hui Xue, Janet (author), Jonker, Mattijs (author), de Ruiter, Joeri (author), Sperotto, Anna (author), van Rijswijk‑Deij, Roland (author), Moura, Giovane C. M. (author), Pras, Aiko (author), de Laat, Cees (author)Policy makers in regions such as Europe are increasingly concerned about the trustworthiness and sovereignty of the foundations of their digital economy, because it often depends on systems operated or manufactured elsewhere. To help curb this problem, we propose the novel notion of a responsible Internet, which provides higher degrees of...journal article 2020
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van Tatenhove-Pel, R.J. (author), Rijavec, Tomaž (author), Lapanje, Aleš (author), van Swam, Iris (author), Zwering, Emile (author), Hernandez-Valdes, Jhonatan A. (author), Kuipers, Oscar P. (author), Picioreanu, C. (author), Teusink, Bas (author), Bachmann, Herwig (author)Metabolic interactions between cells affect microbial community compositions and hence their function in ecosystems. It is well-known that under competition for the exchanged metabolite, concentration gradients constrain the distances over which interactions can occur. However, interaction distances are typically quantified in two-dimensional...journal article 2020
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Maitri, R. V. (author), Padding, J.T. (author), Kuipers, J. A.M. (author), Peters, E. A.J.F. (author)In this work, we perform simulations of particle laden flow in a wide and long narrow channel in a Newtonian fluid. Simulations are performed for mono-sized and equal density spheres with varying Archimedes and Reynolds number. In the simulations, different phases of particle transport - rolling, saltation and suspension are observed. During...journal article 2020
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le Feber, B. (author), Sipe, J. E. (author), Wulf, M. (author), Kuipers, L. (author), Rotenberg, N. (author)Light is a union of electric and magnetic fields, and nowhere is the complex relationship between these fields more evident than in the near fields of nanophotonic structures. There, complicated electric and magnetic fields varying over subwavelength scales are generally present, which results in photonic phenomena such as extraordinary...journal article 2019
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Oostenbrink, J. (author), Kuipers, F.A. (author), Helvik, Bjarne E. (author), Heegaard, Poul E. (author)It is of vital importance to maintain at least some network functionality after a disaster, for example by temporarily replacing damaged nodes by emergency nodes. We propose a framework to evaluate dierent node replacement strategies, based on a large set of representative disasters. We prove that computing the optimal choice of nodes to...journal article 2019