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Bechtel, S. (author)We show L<sup>p</sup>-estimates for square roots of second order complex elliptic systems L in divergence form on open sets in R<sup>d</sup> subject to mixed boundary conditions. The underlying set is supposed to be locally uniform near the Neumann boundary part, and the Dirichlet boundary part is Ahlfors–David regular. The lower endpoint for...journal article 2024
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Amoroso, Pedro (author), van Ostayen, R.A.J. (author), de Rooij, Matthijn B. (author)This work introduces two innovative rolling pair concepts to minimize slippage and reduce mass in cam-roller systems of large-scale hydraulic drivetrains: The variable contact length and the Shifting Contact Geometry concepts. Both aim to improve traction in the low contact force phase in cyclically loaded rolling contacts. The shifting...journal article 2024
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Bolin, David (author), Kirchner, K. (author)We consider two Gaussian measures μ, ˜μ on a separable Hilbert space, with fractional-order covariance operators A<sup>−2β</sup> and Ã<sup>−2˜β</sup>, respectively, and derive necessary and sufficient conditions on A, Ã and β, ˜β > 0 for I. equivalence of the measures μ and ˜μ, and II. uniform asymptotic optimality of linear predictions...journal article 2023
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Derumigny, Alexis (author), Fermanian, J. D. (author)Meta-elliptical copulas are often proposed to model dependence between the components of a random vector. They are specified by a correlation matrix and a map g, called density generator. While the latter correlation matrix can easily be estimated from pseudo-samples of observations, the density generator is harder to estimate, especially...journal article 2022
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Mukhtar, Naila (author), Batina, Lejla (author), Picek, S. (author), Kong, Yinan (author)Deep learning-based side-channel analysis performance heavily depends on the dataset size and the number of instances in each target class. Both small and imbalanced datasets might lead to unsuccessful side-channel attacks. The attack performance can be improved by generating traces synthetically from the obtained data instances instead of...conference paper 2022
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Voss, Jendrik (author), Martin, R.P. (author), Sander, Oliver (author), Kumar, Siddhant (author), Kochmann, Dennis M. (author), Neff, Patrizio (author)Deciding whether a given function is quasiconvex is generally a difficult task. Here, we discuss a number of numerical approaches that can be used in the search for a counterexample to the quasiconvexity of a given function W. We will demonstrate these methods using the planar isotropic rank-one convex function Wmagic+(F)=λmaxλmin-logλmaxλmin...journal article 2022
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Vos, Jelle (author)In our increasingly digital society, we are making a growing amount of data available to computers, networks and third parties. As a consequence, our sensitive data is in danger of getting exposed. The field of multi-party computation attempts to mitigate this by studying protocols that enable parties to perform their operations digitally,...master thesis 2021
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Arias Campo, M. (author), Carluccio, G. (author), Bruni, Simona (author), Llombart, Nuria (author)Low relative permittivity plastic elliptical lenses in combination with integrated focal plane arrays are a promising solution to be used in the future mm- and sub-mm-wave systems. Their appeal lies in the availability of materials with moderate loss and lightweight, and the possibility to use cost-effective manufacturing techniques. However,...journal article 2021
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Hinz, J.P. (author), Jaeschke, Andrzej (author), Möller, M. (author), Vuik, Cornelis (author)This paper proposes a shape optimization algorithm based on the principles of Isogeometric Analysis (IGA) in which the parameterization of the geometry enters the problem formulation as an additional PDE-constraint. Inspired by the isoparametric principle of IGA, the parameterization and the governing state equation are treated using the same...journal article 2021
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Versluis, Niels (author)Elliptic Curve Cryptography (ECC) performance is a major performance bottleneck when serving many VPN clients from a single server on a low-frequency FPGA softcore CPU. Using an area-efficient Elliptic Curve Point (ECP) multiplication accelerator core on the same FGPA, a much higher amount of clients can be served using the same FPGA chip. Using...master thesis 2020
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Hinz, J.P. (author), Möller, M. (author), Vuik, Cornelis (author)Isogeometric Analysis (IgA) has become an accepted framework for the mod-elling, simulation and optimization (MSO) of engineering processes. However, the fully automatized generation of analysis-suitable parameterizations of geometries as they arise in practical workflows is still a challenging task, which often requires application-specific...conference paper 2020
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Teunissen, P.J.G. (author)This contribution extends the theory of integer equivariant estimation (Teunissen in J Geodesy 77:402–410, 2003) by developing the principle of best integer equivariant (BIE) estimation for the class of elliptically contoured distributions. The presented theory provides new minimum mean squared error solutions to the problem of GNSS carrier...journal article 2020
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Liebrand, Rens (author)Cavitating tip vortices of marine propellers are the main contributors to underwater radiated ship noise due to their dynamic behavior and broadband sound spectrum. Experimentally, it is challenging to get a detailed insight into the vortex structure which makes it difficult to understand the noise generating mechanisms. Although Computational...master thesis 2019
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Katsaounis, Georgios (author)Recent advances in sensor technology have lead to increased resolution of novel sensors, while tracking applications where distance between sensors and objects of interest is very small have gained research interest recently. In these cases, it is possible that multiple sensor detections are generated by each object of interest. Extended Object...master thesis 2019
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Lindemulder, N. (author)This thesis is concerned with the maximal regularity problem for parabolic boundary value problems with inhomogeneous boundary conditions in the setting of weighted function spaces and related function space theoretic problems.<br/>This in particularly includes weighted $L_{q}$-$L_{p}$-maximal regularity but also weighted $L_{q}$-maximal...doctoral thesis 2019
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Integration of elliptical ship domains and velocity obstacles for ship collision candidate detectionChen, P. (author), van Gelder, P.H.A.J.M. (author), Mou, J. M. (author)The maritime shipping industry has been making significant contributions to the development of the regional and global economy. However, maritime accidents and their severe consequences have been posing an incrementing risk to the individuals and societies. It is therefore important to conduct risk analysis on such accidents to support...journal article 2019
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Liebrand, Rens (author), Klapwijk, M.D. (author), Lloyd, Thomas (author), Vaz, Guilherme (author), Lopes, Rui (author)A sensitivity analysis of the transitional flow over a NACA66<sub>2</sub> - 415 foil and the elliptical Arndt wing is carried out. The SST turbulence model is complemented with the ? - Re <sup>~</sup><sub>?t</sub> transition model to determine the effect of varying turbulence intensity and eddy-viscosity ratio on the integral quantities and...conference paper 2019
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Pan, Michel (author)Digitalization of sensitive information such as bankaccounts enforces privacy to be ensured. Mathematical objects called elliptic curves have ensured exchange of this type of information due to their algebraic structure. The security relies on so called ECDLP and solving these types of problems, but there has yet to be found an efficient...bachelor thesis 2018
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Vrooman, Rogier (author)Within the phenomenon known as the Internet of Things (IoT), an enormous growth is taking place. IoT systems exist in different ways, ranging from industrial applications to user focused systems. A specific subset of a user-focused IoT system is found as Smart Home environments. At Smart Homes, themultiple Smart Objects or Smart Devices are...master thesis 2017
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Markensteijn, A.S. (author)Reservoir simulation is a widely used means for prediction and optimization of oil recovery from a reservoir and it is based on the multiphase porous media flow model. For one dimensional, incompressible, immiscible three-phase flow in a homogeneous medium without gravity and capillary pressure, loss of strict hyperbolicity can occur for certain...master thesis 2016