2019

Schmitt, Nikolai ; Georg, Niklas ; Gauthier, Brière ; Loukrezis, Dimitrios ; Héron, Sébastien ; Lanteri, Stéphane ; Klitis, Charalambos ; Sorel, Marc ; Römer, Ulrich ; De Gersem, Herbert ; Vézian, Stéphane ; Genevet, Patrice :
Optimization and uncertainty quantification of gradient index metasurfaces.
[Online-Edition: http://www.osapublishing.org/ome/abstract.cfm?URI=ome-9-2-89...]
In: Optical Materials Express, 9 (2) S. 892-910.
[Artikel] , (2019)

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert :
Assessing the Performance of Leja and Clenshaw-Curtis Collocation for Computational Electromagnetics with Random Input Data.
[Online-Edition: http://www.dl.begellhouse.com/journals/52034eb04b657aea.html#publikationen]
In: International Journal for Uncertainty Quantification ISSN 2152-5099
[Artikel] , (2019) (Im Druck)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian :
Stochastic modeling of magnetic hysteretic properties by using multivariate random fields.
In: International Journal for Uncertainty Quantification ISSN 2152-5080
[Artikel] , (2019)

2018

Georg, Niklas ; Corno, Jacopo ; De Gersem, Herbert ; Zadeh, Shahnam Gorgi ; Römer, Ulrich ; Schöps, Sebastian ; Sulimov, Alexey ; van Rienen, Ursula :
Uncertainty quantification for the fundamental mode spectrum of the European XFEL Cavities.
[Online-Edition: http://bt.pa.msu.edu/ICAP18]
In: 13th International Computational Accelerator Physics Conference (ICAP18).
[ Konferenzveröffentlichung] , (2018)

Ion, Ion Gabriel ; Bontinck, Zeger ; Loukrezis, Dimitrios ; Römer, Ulrich ; Lass, Oliver ; Ulbrich, Stefan ; Schöps, Sebastian ; De Gersem, Herbert :
Robust Shape Optimization of Electric Devices Based on Deterministic Optimization Methods and Finite Element Analysis With Affine Decomposition and Design Elements.
[Online-Edition: https://doi.org/10.1007/s00202-018-0716-6]
In: Electrical Engineering (Archiv für Elektrotechnik) ISSN 1432-0487
[Artikel] , (2018)

Georg, Niklas ; Loukrezis, Dimitrios ; Römer, Ulrich ; Schöps, Sebastian :
Uncertainty Quantification for an Optical Grating Coupler with Adjoint-based Adaptive Collocation.
[Online-Edition: http://maxwell-in-motion.org]
In: Workshop on Advances in Electromagnetic Research — KWT 2018, Rietzlern, Austria. Maxwell in Motion
[ Konferenzveröffentlichung] , (2018)

Bontinck, Zeger ; Ion, Ion Gabriel ; Loukrezis, Dimitrios ; Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert :
Using Affine Decompositions and Design Elements for Geometric Parametrization.
[Online-Edition: http://maxwell-in-motion.org]
In: Workshop on Advances in Electromagnetic Research — KWT 2018, Rietzlern, Austria. Maxwell in Motion
[ Konferenzveröffentlichung] , (2018)

Georg, Niklas ; Römer, Ulrich ; Schöps, Sebastian ; Schuhmann, Rolf :
Uncertainty Quantification for an Optical Grating Coupler using Adaptive Stochastic Collocation.
[Online-Edition: https://www.siam.org/meetings/uq18]
In: SIAM Conference on Uncertainty Quantification 2018.
[ Konferenzveröffentlichung] , (2018)

Ion, Ion Gabriel ; Loukrezis, Dimitrios ; Römer, Ulrich ; Bontinck, Zeger ; Schöps, Sebastian ; Lass, Oliver ; Ulbrich, Stefan ; De Gersem, Herbert :
Shape Optimization of Electric Devices Combining a Deterministic Optimization Method With Design Elements.
[Online-Edition: http://aimontefiore.org/emf2018/]
In: 11th International Symposium on Electric and Magnetic Fields (EMF 2018).
[ Konferenzveröffentlichung] , (2018)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian :
Modeling uncertainties in the magnetic hysteresis and their impact on the field quality of a combined function magnet.
[Online-Edition: http://aimontefiore.org/emf2018/]
In: 11th International Symposium on Electric and Magnetic Fields (EMF 2018).
[ Konferenzveröffentlichung] , (2018)

Loukrezis, Dimitrios ; Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian ; De Gersem, Herbert :
High Dimensional Uncertainty Quantification for an Electrothermal Field Problem using Stochastic Collocation on Sparse Grids and Tensor Train Decomposition.
[Online-Edition: https://doi.org/10.1002/jnm.2222]
In: International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 31 (2) ISSN 1099-1204
[Artikel] , (2018)

Römer, Ulrich ; Clénet, Stéphane ; Schöps, Sebastian :
Duality Based Estimation of Linearization Errors in Stochastic Computations.
[Online-Edition: http://jahrestagung.gamm-ev.de]
In: 89th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2018). München
[ Konferenzveröffentlichung] , (2018)

Casper, Thorben ; Römer, Ulrich ; De Gersem, Herbert ; Schöps, Sebastian :
Coupled Simulation of Transient Heat Flow and Electric Currents in Thin Wires: Application to Bond Wires in Microelectronic Chip Packaging.
In: arXiv , 1809.09034 .
[Report] , (2018) (Eingereicht)

2017

Bontinck, Zeger ; Corno, Jacopo ; Gersem, Herbert De ; Kurz, Stefan ; Pels, Andreas ; Schöps, Sebastian ; Wolf, Felix ; de Falco, Carlo ; Dölz, Jürgen ; Vázquez, Rafael ; Römer, Ulrich :
Recent Advances of Isogeometric Analysis in Computational Electromagnetics.
[Online-Edition: http://www.compumag.org/jsite/images/stories/newsletter]
In: ICS Newsletter (International Compumag Society), 3
[Artikel] , (2017)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian
Schäfer, Michael (ed.) :
Modeling uncertainties in the magnetic hysteresis and their impact on the field quality of a combined function magnet.
In: 4th International Conference on Computational Engineering (ICCE 2017), Darmstadt, Germany. Darmstadt, Germany
[ Konferenzveröffentlichung] , (2017)

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian
Dyczij-Edlinger, Romanus (ed.) :
Determining Bond Wire Temperatures in Electronic Devices by a 1D-3D Coupling Approach.
[Online-Edition: https://www.kh2017.de]
In: URSI Kleinheubacher Tagung (KHB 2017), Miltenberg. Miltenberg
[ Konferenzveröffentlichung] , (2017)

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian
Schäfer, Michael (ed.) :
On the Simulation of Thin Wires in a Coupled 1D-3D Setting.
In: 4th International Conference on Computational Engineering (ICCE 2017), Darmstadt, Germany. Darmstadt, Germany
[ Konferenzveröffentlichung] , (2017)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian :
Modeling Uncertainties in the Magnetic Hysteresis and their Impact on the Field Quality of a Combined Function Magnet.
[Online-Edition: http://maxwell-in-motion.org]
In: Workshop on Advances in Electromagnetic Research — KWT 2017.
[ Konferenzveröffentlichung] , (2017)

Georg, Niklas ; Römer, Ulrich ; Schöps, Sebastian :
Uncertainty Quantification for a Plasmon Waveguide using Stochastic Collocation.
[Online-Edition: http://maxwell-in-motion.org]
In: Workshop on Advances in Electromagnetic Research — KWT 2017.
[ Konferenzveröffentlichung] , (2017)

Römer, Ulrich ; Schmidt, Christian ; van Rienen, Ursula ; Schöps, Sebastian :
Low-Dimensional Stochastic Modeling of the Electrical Properties of Biological Tissues.
[Online-Edition: https://doi.org/10.1109/TMAG.2017.2668841]
In: IEEE Transactions on Magnetics, 53 (6) S. 1-4. ISSN 0018-9464
[Artikel] , (2017)

Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian :
Uncertainty Quantification for a Singular Electrothermal Coupled Problem with Error Control.
[Online-Edition: https://2017.uncecomp.org]
In: UNCECOMP 2017, Rhodes Island, Greece. Rhodes Island, Greece
[ Konferenzveröffentlichung] , (2017)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian
Jung, Hyun-Kyo (ed.) :
The Impact of Spatial Uncertainties in the Magnetic Reluctivity on the Field Quality of a Combined Function Magnet.
[Online-Edition: http://www.compumag2017.com]
In: 21th Conference on the Computation of Electromagnetic Fields, Daejeon, Korea. Daejeon, Korea
[ Konferenzveröffentlichung] , (2017)

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian
Jung, Hyun-Kyo (ed.) :
An Electrothermal 1D-3D Coupling Approach for Thin Wires in Microelectronic Chip Packages.
[Online-Edition: http://www.compumag2017.com]
In: 21th Conference on the Computation of Electromagnetic Fields, Daejeon, Korea. Daejeon, Korea
[ Konferenzveröffentlichung] , (2017)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian :
Modeling of Spatial Uncertainties in the Magnetic Reluctivity.
[Online-Edition: https://doi.org/10.1108/COMPEL-10-2016-0438]
In: COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 36 (4) S. 1151-1167. ISSN 0332-1649
[Artikel] , (2017)

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert :
A Defect Corrected Finite Element Approach for the Accurate Evaluation of Magnetic Fields on Unstructured Grids.
[Online-Edition: https://doi.org/10.1016/j.jcp.2017.01.041]
In: Journal of Computational Physics, 335 S. 688-699.
[Artikel] , (2017)

Galetzka, Armin ; Bontinck, Zeger ; Römer, Ulrich ; Schöps, Sebastian :
Multilevel Monte Carlo Simulation of the Eddy Current Problem With Random Parameters.
[Online-Edition: https://doi.org/10.23919/ROPACES.2017.7916062]
In: 2017 International Applied Computational Electromagnetics Society Symposium. IEEE
[Buchkapitel] , (2017)

Galetzka, Armin ; Bontinck, Zeger ; Römer, Ulrich ; Schöps, Sebastian :
Multilevel Monte Carlo Simulation of the Eddy Current Problem With Random Parameters.
[Online-Edition: http://aces-society.org/conference/Italy_2017/]
In: 2017 International Applied Computational Electromagnetics Society (ACES) Symposium.
[ Konferenzveröffentlichung] , (2017)

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert :
Leja-Based Adaptive Sparse Grids for High-Dimensional Uncertainty Quantification in Scattering Parameter Simulations.
In: Proceedings of the 4th International Conference on Computational Engineering.
[ Konferenzveröffentlichung] , (2017)

Loukrezis, Dimitrios ; Römer, Ulrich ; De Gersem, Herbert :
Leja-Based Adaptive Sparse Grids for Uncertainty Quantification in High-Frequency Electromagnetics.
In: Kleinheubacher Berichte.
[ Konferenzveröffentlichung] , (2017)

2016

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian :
Determination of Bond Wire Failure Probabilities in Microelectronic Packages.
[Online-Edition: http://www.therminic2016.eu]
In: THERMINIC 2016.
[ Konferenzveröffentlichung] , (2016)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian
Belahcen, Anouar ; Demenko, Andrzej ; Pietrowski, Wojciech (eds.) :
Stochastic Modeling of an Inhomogeneous Magnetic Reluctivity Using the Karhunen-Loève Expansion and the Hierarchical Matrix Technique.
In: XXIV Symposium Electromagnetic Phenomena in Nonlinear Circuits - Proceedings EPNC 2016. Poznań, PTETiS Publishers ISBN 978-83-62712-04-05
[Buchkapitel] , (2016)

Jankoski, Radoslav ; Römer, Ulrich ; Schöps, Sebastian :
Stochastic Modeling of an Inhomogeneous Magnetic Reluctivity Using the Karhunen-Loève Expansion and the Hierarchical Matrix Technique.
[Online-Edition: http://ptetis.put.poznan.pl/epnc/]
In: XXIV Symposium Electromagnetic Phenomena in Nonlinear Circuits (EPNC 2016).
[ Konferenzveröffentlichung] , (2016)

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian :
Efficient Evaluation of Bond Wire Fusing Probabilities.
[Online-Edition: https://www.siam.org/meetings/uq16/]
In: SIAM Conference on Uncertainty Quantification 2016.
[ Konferenzveröffentlichung] , (2016)

Loukrezis, Dimitrios ; Römer, Ulrich ; Casper, Thorben ; Schöps, Sebastian ; De Gersem, Herbert :
Application of High Dimensional Uncertainty Quantification Methods to Electrothermal Field Problems.
[Online-Edition: http://www.aimontefiore.org/emf2016/]
In: 10th International Symposium on Electric and Magnetic Fields (EMF 2016).
[ Konferenzveröffentlichung] , (2016)

ter Maten, E. Jan W. ; Schöps, Sebastian ; Duque, David ; Casper, Thorben ; De Gersem, Herbert ; Römer, Ulrich :
Nanoelectronic COupled problems solutions - nanoCOPS: modelling, multirate, model order reduction, uncertainty quantification, fast fault simulation.
[Online-Edition: https://dx.doi.org/10.1186/s13362-016-0025-5]
In: Journal of Mathematics in Industry, 7 (2) ISSN 2190-5983
[Artikel] , (2016)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Stochastic Modeling and Regularity of the Nonlinear Elliptic curl-curl Equation.
[Online-Edition: http://dx.doi.org/10.1137/15M1026535]
In: SIAM/ASA Journal on Uncertainty Quantification, 4 (1) S. 952-979. ISSN 2166-2525
[Artikel] , (2016)

Casper, Thorben ; Römer, Ulrich ; Schöps, Sebastian :
Determination of Bond Wire Failure Probabilities in Microelectronic Packages.
[Online-Edition: https://doi.org/10.1109/THERMINIC.2016.7748645]
In: 22nd International Workshop on Thermal Investigations of ICs and Systems (THERMINIC). , S. 39-44.
[Buchkapitel] , (2016)

2015

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert :
An Adjoint Approach for Uncertainty Quantification of Magnetoquasistatic Field Problems.
In: International Conference on Electromagnetics in Advanced Applications (ICEAA) 2015.
[ Konferenzveröffentlichung] , (2015)

Lass, Oliver ; Römer, Ulrich ; Schöps, Sebastian :
Robust Shape Optimization of Accelerator Magnets.
In: PIERS Progress In Electromagnetics Research Symposium (PIERS) 2015.
[ Konferenzveröffentlichung] , (2015)

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert :
A Defect Correction Scheme for the Accurate Evaluation of Magnetic Fields on Unstructured Grids.
[Online-Edition: http://www.compumag2015.com]
In: Proceedings of the 20th Conference on the Computation of Electromagnetic Fields.
[ Konferenzveröffentlichung] , (2015)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Magnetoquasistatic Simulation with Uncertainties and Applications in Magnet Design.
In: URSI AT-RASC 2015.
[ Konferenzveröffentlichung] , (2015)

Römer, Ulrich ; Schöps, Sebastian :
Stochastic Modeling and Regularity of the Nonlinear Elliptic-Parabolic Magnetoquasistatic Equation.
In: 86th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2015). Lecce
[ Konferenzveröffentlichung] , (2015)

Römer, Ulrich :
Numerical Approximation of the Magnetoquasistatic Model with Uncertainties and its Application to Magnet Design.
[Online-Edition: http://tuprints.ulb.tu-darmstadt.de/4950]
Technische Universität , Darmstadt
[Dissertation], (2015)

Römer, Ulrich ; Schöps, Sebastian ; De Gersem, Herbert :
An Adjoint Approach for Uncertainty Quantifcation of Magnetoquasistatic Field Problems.
[Online-Edition: http://dx.doi.org/10.1109/ICEAA.2015.7297241]
In: Proceedings of the International Conference on Electromagnetics in Advanced Applications.
[Buchkapitel] , (2015)

Römer, Ulrich ; Schöps, Sebastian :
Adjoint Error Estimation for a Pseudo-Spectral Approach to Stochastic Field-Circuit Coupled Problems.
[Online-Edition: http://dx.doi.org/10.1002/pamm.201510345]
In: Proceedings in Applied Mathematics and Mechanics. , S. 711-714.
[Buchkapitel] , (2015)

2014

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
A Spline Based Shape Derivative Approach for the Nonlinear Magnetostatic Interface Problem.
In: 13th International Workshop on Optimization and Inverse Problems in Electromagnetism (OIPE2014).
[ Konferenzveröffentlichung] , (2014)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
A Defect Correction Method for the Accurate Local Evaluation of Magnetic Fields.
In: URSI Kleinheubacher Tagung (KHB 2014).
[ Konferenzveröffentlichung] , (2014)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Methods for the Quantification of Uncertainties in Nonlinear Material Laws in Electrical Engineering.
In: 6th International Conference on Advanced COmputational Methods in ENgineering (ACOMEN).
[ Konferenzveröffentlichung] , (2014)

Jansen, Lennart ; Römer, Ulrich ; Schöps, Sebastian :
Abstract Differential-Algebraic Equations in Electrical Engineering.
In: 85th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2014). Erlangen-Nürnberg
[ Konferenzveröffentlichung] , (2014)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
First Order k-th Moment Analysis for the Nonlinear Eddy Current Problem.
In: SIAM Conference on Uncertainty Quantification 2014.
[ Konferenzveröffentlichung] , (2014)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Approximation of Moments for the Nonlinear Eddy Current Model with Material Uncertainties.
[Online-Edition: http://dx.doi.org/10.1109/TMAG.2013.2284637]
In: IEEE Transactions on Magnetics, 50 (2)
[Artikel] , (2014)

2013

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Approaches for the Quantification of Uncertainies in Stochasic Magnet Design.
In: Beam Dynamics meets Magnets in the EuCARD2 XBEAM-XRING Network.
[ Konferenzveröffentlichung] , (2013)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
A First Order k-th Moment Method for the Nonlinear Magnetoquasistatics Problem with Material Uncertainties.
In: Kleinheubacher Tagung 2013.
[ Konferenzveröffentlichung] , (2013)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Second Moment Analysis of the Nonlinear Eddy Current Model with Material Uncertainties.
In: 19th International Conference on the Computation of Electromagnetic Fields COMPUMAG.
[ Konferenzveröffentlichung] , (2013)

Klimek, Mariusz ; Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Discretization of Maxwell Equations in Geometric Algebra Setting.
In: URSI EMTS 2013.
[ Konferenzveröffentlichung] , (2013)

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
On Uncertainties in Low-Frequency Electromagnetics.
In: URSI Commission B Workshop.
[ Konferenzveröffentlichung] , (2013)

Klimek, Mariusz ; Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Space-Time Discretization of Maxwell's Equations in the Setting of Geometric Algebra.
In: Proceedings of the URSI International Symposium on Electromagnetic Theory. , S. 1-24.
[Buchkapitel] , (2013)

Bartel, Andreas ; De Gersem, Herbert ; Hülsmann, Timo ; Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
Quantification of Uncertainty in the Field Quality of Magnets Originating from Material Measurements.
[Online-Edition: http://dx.doi.org/10.1109/TMAG.2013.2241041]
In: IEEE Transactions on Magnetics, 49 (5) S. 2367-2370.
[Artikel] , (2013)

2012

Römer, Ulrich ; Schöps, Sebastian ; Weiland, Thomas :
On Uncertainties in Low-Frequency Electromagnetics.
In: Seminar in Numerical Analysis.
[ Konferenzveröffentlichung] , (2012)

2011

Claßen, Christoph ; Gjonaj, Erion ; Römer, Ulrich ; Schuhmann, Rolf ; Weiland, Thomas :
Modeling of Field Singularities at Dielectric Edges Using Grid Based Methods.
In: Advances in Radio Science, 9 S. 39-44.
[Artikel] , (2011)

2010

Römer, Ulrich ; Gjonaj, Erion ; Weiland, Thomas :
A Discontinous Galerkin Method with Locally Singular Basis Functions.
In: Proceedings of the 10th International Workshop on Finite Elements for Microwave Engineering.
[ Konferenzveröffentlichung] , (2010)