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Perenzoni, M. (author), Cavallo, D. (author)This paper describes and addresses the challenges that are encountered while designing a 900 GHz antenna for FET detectors using a standard submicron CMOS technology. The reduced metal stack, the problem of surface waves and technology-related rules are taken into account in order to properly design an efficient antenna, with the objective to...conference paper 2015
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Märtens, M. (author), Shen, S. (author), Iosup, A. (author), Kuipers, F.A. (author)Social interactions in multiplayer online games are an essential feature for a growing number of players world-wide. However, this interaction between the players might lead to the emergence of undesired and unintended behavior, particularly if the game is designed to be highly competitive. Communication channels might be abused to harass and...conference paper 2015
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Fois, F. (author), Hoogeboom, P. (author), le Chevalier, F. (author), Stoffelen, Ad (author), Mouche, A. (author)A radar scatterometer operates by transmitting a pulse of microwave energy toward the ocean’s surface and measuring the normalized (per-unit-surface) radar backscatter coefficient (r8). The primary application of scatterometry is the measurement of near-surface ocean winds. By combining r 8 measurements from different azimuth angles, the 10 m...journal article 2015
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- Alfano, M.R. (author) journal article 2015
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van Kuijk, J.I. (author), van Driel, Liesbeth (author), van Eijk, D.J. (author)This study explored how usability was dealt with in four product development organizations active in different sectors: high-end automotive, professional printers and copiers, office coffee makers and fast moving consumer goods. The primary differentiators of the selected cases were whether they were targeting businesses or consumers and the...journal article 2015
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Ilyushkin, A.S. (author), Ghit, B.I. (author), Epema, D.H.J. (author)Workflows are important computational tools in many branches of science, and because of the dependencies among their tasks and their widely different characteristics, scheduling them is a difficult problem. Most research on scheduling workflows has focused on the offline problem of minimizing the makespan of single workflows with known task...conference paper 2015
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Bentum, Mark J (author), Lager, I.E. (author), Bosma, S. (author), Bruinsma, W.P. (author), Hes, R.P. (author)The impact of the fluctuations in the locations of elementary radiators on the radiation properties of three-dimensional (3D) array antennas is studied. The principal radiation features (sidelobes level, beam squint) are examined based on illustrative examples. Some atypical behaviours, that are specific to 3D arrays, are highlighted. The effect...conference paper 2015
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Ammerlaan, Erik (author), Veninga, Wim (author), Zaidman, A.E. (author)Depending on the context, the benefits of clean code with respect to understandability might be less obvious in the short term than is often claimed. In this study we evaluate whether a software system with legacy code in an industrial environment benefits from a 'clean code' refactoring in terms of developer productivity. We observed both...conference paper 2015
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Sousa, João A.B. (author), Sorokin, Dimitry Y. (author), Bijmans, Martijn F.M. (author), Plugge, Caroline M. (author), Stams, Alfons J.M. (author)Haloalkaliphilic microorganisms that grow optimally at high-pH and high-salinity conditions can be found in natural environments such as soda lakes. These globally spread lakes harbour interesting anaerobic microorganisms that have the potential of being applied in existing technologies or create new opportunities. In this review, we discuss...review 2015
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Thang, N. V. (author), van Dijk, N.H. (author), Brück, E.H. (author)The influence of the milling conditions on the nano-scale MnFe(P,Si) particles obtained by surfactant-assisted high-energy ball milling has been investigated by X-ray diffraction (XRD) and magnetic measurements. The presence of surfactant oleic acid prevents the re-welding of crushed particles and enhances the dispersion of nanoparticles in...journal article 2015
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- Cap, Michal (author), Novak, P. (author), Kleiner, Alexander (author), Selecky, Martin (author), Pechoucek, Michal (author) journal article 2015
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Kabbedijk, Jaap (author), Bezemer, C. (author), Jansen, Slinger (author), Zaidman, A.E. (author)Software as a service is frequently offered in a multi-tenant style, where customers of the application and their end-users share resources such as software and hardware among all users, without necessarily sharing data. It is surprising that, with such a popular paradigm, little agreement exists with regard to the definition, domain, and...journal article 2015
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Shen, S. (author), Iosup, A. (author), Israel, Assaf (author), Cirne, Walfredo (author), Raz, Danny (author), Epema, D.H.J. (author)Data enters are at the core of a wide variety of daily ICT utilities, ranging from scientific computing to online gaming. Due to the scale of today's data enters, the failure of computing resources is a common occurrence that may disrupt the availability of ICT services, leading to revenue loss. Although many high availability (HA) techniques...conference paper 2015
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Shen, S. (author), Iosup, A. (author), Epema, D.H.J. (author), Hu, Shun-Yun (author)Although Multi-Avatar Distributed Virtual Environments (MAVEs) such as Real-Time Strategy (RTS) games entertain daily hundreds of millions of online players, their current designs do not scale. For example, even popular RTS games such as the StarCraft series support in a single game instance only up to 16 players and only a few hundreds of...journal article 2015
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Jia, L. (author), Schoon, P.B. (author), Pouwelse, J.A. (author), Epema, D.H.J. (author)User interactions are indispensable for any online network to thrive, especially for BitTorrent‐like and Web real‐time communication‐based distributed online networks that rely on users' collective contributions instead of the help of central servers. User interactions provide fine‐grained information for many applications, such as security...journal article 2015
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Gkorou, D. (author), Pouwelse, J.A. (author), Epema, D.H.J. (author)Distributed reputation systems establish trust among strangers in online communities and provide incentives for users to contribute. In these systems, each user monitors the interactions of others and computes the reputations accordingly. Collecting information for computing the reputations is challenging for the users due to their vulnerability...conference paper 2015
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Rodrigues Espinha, T.A. (author), Zaidman, A.E. (author), Gross, H.G. (author)Web APIs provide a systematic and extensible approach for application-to-application interaction. Developers using web APIs are forced to accompany the API providers in their software evolution tasks. In order to understand the distress caused by this imposition on web API client developers we perform a semi-structured interview with six such...journal article 2015
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Aulin, Y. (author), van Sebille, M. (author), Moes, Michiel (author), Grozema, F.C. (author)This paper studies photochemical upconversion in solutions of octaethyl porphyrin (OEP) and diphenyl anthracene (DPA). The system has been widely used as a standard model system in the field of photochemical upconversion. Although, the kinetics of elementary processes contributing to photochemical upconversion in it have been extensively...journal article 2015
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Fuhrmann, T. (author), Cuenca, M. Caro (author), Knöpfler, A. (author), van Leijen, F.J. (author), Mayer, M. (author), Westerhaus, M. (author), Hanssen, R.F. (author), Heck, B (author)The three geodetic techniques InSAR, levelling and GNSS are complementary w.r.t. (i) the sensitivity to horizontal and vertical displacement components, (ii) the spatial and temporal resolution of the measurements and (iii) the accuracy of the resulting displacements. We present a strategy to robustly combine the displacement estimates of the...conference paper 2015
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Ruiz-Armenteros, Antonio M. (author), Delgado, J. Manuel (author), Sousa, Joaquim J. (author), Hanssen, R.F. (author), Caro, Miguel (author), Gil, Antonio J. (author), Galindo-Zaldivar, Jesús (author), Sanz de Galdeano, Carlos (author)The Betic-Rif cordilleras are build-up in the western Mediterranean by the deformations related to the Eurasian-African plate boundary. The recent NW-SE convergence produces the simultaneous development of large folds and faults in the central part of the Internal Zones of the Betic Cordilleras, which continues active up to Present. The uplift...conference paper 2015