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Liu, Qingzhi (author), Ozcelebi, Tanir (author), Cheng, Long (author), Kuipers, F.A. (author), Lukkien, Johan (author)Software-defined networking (SDN) is a cornerstone of next-generation networks and has already led to numerous advantages for data-center networks and wide-area networks, for instance in terms of reduced management complexity and more fine-grained traffic engineering. However, the design and implementation of SDN within wireless sensor networks ...conference paper 2019
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Demetri, Silvia (author), Zuniga, Marco (author), Picco, Gian Pietro (author), Kuipers, F.A. (author), Bruzzone, Lorenzo (author), Telkamp, Thomas (author)Many research and industrial communities are betting on LoRa to provide reliable, long-range communication for the Internet of Things. This new radio technology, however, provides widely heterogeneous coverage; a LoRa link may span hundreds of meters or tens of kilometers, depending on the surrounding environment. This high variability is not...conference paper 2019
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Valentini, Alessandro (author), Vass, Balazs (author), Oostenbrink, J. (author), Csak, Levente (author), Kuipers, F.A. (author), Pace, Bruno (author), Hay, David (author), Tapolcai, Janos (author)Guaranteeing a high availability of network services is a crucial part of network management. In this study, we show how to compute the availability of network services under earthquakes, by using empirical data. We take a multi-disciplinary approach and create an earthquake model based on seismological research and historical data. We then show...conference paper 2019
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Cerqueira Afonso Alves, Renan (author), Borges Margi, Cintia (author), Kuipers, F.A. (author)The Internet of Things (IoT) has and will continue to permeate many aspects of everyday life. However, IoT de- vices often use wireless communication to transfer their data, which may experience ambient noise and multipath fading. This, together with the wide heterogeneity in types of devices, leads to the emergence of unidirectional links in...conference paper 2019
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Turkovic, B. (author), Kuipers, F.A. (author), van Adrichem, Niels (author), Langendoen, K.G. (author)Along with exciting visions for 5G communications and the Tactile Internet, the networking requirement of attaining extremely low end-to-end latency has appeared. While network devices are typically equipped with buffers to counteract packet loss caused by short-lived traffic bursts, the more those buffers get filled, the more delay is added to...conference paper 2018
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Yang, Xueying (author), Karampatzakis, Evgenios (author), Dörr, C. (author), Kuipers, F.A. (author)LoRaWAN is a MAC-layer protocol for long-range low-power communication. Since its release in 2015, it has experienced a rapid adoption in the field of Internet-of-Things (IoT). However, given that LoRaWAN is fairly novel, its level of security has not been thoroughly analyzed, which is the main objective of this paper. We highlight the security...conference paper 2018
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Kuipers, J.R. (author), Wieringa, P.A. (author)The risk of being involved in an accident in the first year after licensing is greater for novice drivers who passed their driving exam the first time than for novice drivers who failed their first driving exam. Enhanced training programmes can shorten the duration of training and can raise the passing rate on the first exam, but can also...conference paper 2018
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Rahmadhani, Andri (author), Kuipers, F.A. (author)LoRa, an abbreviation of Long Range, is a Low-Power Wide Area Network (LPWAN) radio technology that has quickly gained popularity as a communications means for the Internet-of-Things (IoT). LoRa is typically used together with the MAC protocol LoRaWAN and operates in the license-free ISM-bands. As such, anyone is allowed to deploy their own...conference paper 2018
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Basuki, Akbari Indra (author), Kuipers, F.A. (author)Localizing network link failures is crucial to guarantee sufficient network capacity and to efficiently manage network resources. However, since most of today's networks use link aggregation to increase bandwidth, localizing a single physical link failure within such aggregated links is challenging. In this paper, we propose and evaluate...conference paper 2018
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Tapolcai, János (author), Vass, Balazs (author), Heszberger, Zalan (author), Biro, Jozsef (author), Hay, David (author), Kuipers, F.A. (author), Ronyai, Lajos (author)In order to evaluate the expected availability of a service, a network 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,...conference paper 2018
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Alpeggiani, F. (author), Parappurath, N. (author), Verhagen, Ewold (author), Kuipers, L. (author)The scattering matrix is a fundamental tool to quantitatively describe the properties of resonant systems. In particular, it enables the understanding of many photonic devices of current interest, such as photonic metasurfaces and nanostructured optical scatterers. In this contribution, we show that the scattering matrix of a photonic system...conference paper 2017
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Kuipers, Tim (author), Doubrovski, E.L. (author), Verlinden, J.C. (author)This work presents halftoning techniques to manufacture 3D objects with the appearance of full grayscale imagery for Fused Deposition Modeling (FDM) printers. While droplet-based dithering is a common halftoning technique, this is not applicable to FDM printing, since FDM builds up objects by extruding material in semi-continuous paths. A set...conference paper 2017
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de Angelis, L. (author), Alpeggiani, F. (author), Di Falco, Andrea (author), Kuipers, L. (author)Phase singularities can be created and annihilated, but always in pairs. With optical near-field measurements, we track singularities in random waves as a function of wavelength, and discover correlations between creation and annihilation events.conference paper 2017
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Çetinay Iyicil, H. (author), Kekec, I.T. (author), Kuipers, F.A. (author), Tax, D.M.J. (author)Many countries aim to integrate a substantial amount of wind energy in the near future. This requires meticulous planning, which is challenging due to the uncertainty in wind profiles. In this paper, we propose a novel framework to discover and investigate those geographic areas that are well suited for building wind farms. We combine the key...conference paper 2017
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Muhammad Iqbal, M.A.F. (author), Kuipers, F.A. (author)Networks are typically embedded in non-homogeneous areas and different parts/regions of the network may therefore be at risk from different types of disasters. This non-homogeneity leads to difficulties in protecting the network against (the risk of) disasters. Network operators need to be able to integrate predictions on possible future...conference paper 2017
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Parappurath, N. (author), Alpeggiani, F. (author), Kuipers, L. (author), Verhagen, E. (author)We develop a theoretical formalism which explains asymmetric transmission (AT) in chiral resonators from their eigenmodes. We derive a fundamental limit for AT and propose the design of a chiral photonic crystal offering 84% AT.conference paper 2017
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Märtens, M. (author), Kuipers, F.A. (author), Van Mieghem, P.F.A. (author)Networks are continuously growing in complexity, which creates challenges for determining their most important characteristics. While analytical bounds are often too conservative, the computational effort of algorithmic approaches does not scale well with network size. This work uses Cartesian Genetic Programming for symbolic regression to...conference paper 2017
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de Winter, J.C.F. (author), Kuipers, J.R. (author)Young and inexperienced drivers are over-involved in traffic violations and car crashes. There is a paucity of research on the use of driving simulators for assessing driving style. This study investigated the relationships between years of licensure and driving style measured with a short simulator-based test. At a motor show, 650 licensed...conference paper 2017
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Krishna, Hedi (author), van Adrichem, N.L.M. (author), Kuipers, F.A. (author)Quality of Service (QoS) control is an important concept in computer networking, as it is related to end-user experience. While providing QoS guarantees over the Internet has long been deemed too complicated, the emergence of Software- Defined Networking (SDN), and OpenFlow as its most popular standard, may facilitate QoS control.<br/>In this...conference paper 2016
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van Adrichem, N.L.M. (author), Muhammad Iqbal, M.A.F. (author), Kuipers, F.A. (author)The past century of telecommunications has shown that failures in networks are prevalent. Failure recovery processes are therefore needed. Failure recovery is mainly influenced by (1) detection of the failure, and (2) circumvention of the detected failure. However, especially in SDNs where controllers recompute network state reactively, this...conference paper 2016