@article{DiethelmUhlig, author = {Diethelm, Kai and Uhlig, Frank}, title = {A New Approach to Shooting Methods for Terminal Value Problems of Fractional Differential Equations}, series = {Journal of Scientific Computing}, volume = {97}, journal = {Journal of Scientific Computing}, number = {2}, issn = {0885-7474}, abstract = {For terminal value problems of fractional differential equations of order α∈(0,1) that use Caputo derivatives, shooting methods are a well developed and investigated approach. Based on recently established analytic properties of such problems, we develop a new technique to select the required initial values that solves such shooting problems quickly and accurately. Numerical experiments indicate that this new proportional secting technique converges very quickly and accurately to the solution. Run time measurements indicate a speedup factor of between 4 and 10 when compared to the standard bisection method.}, language = {en} } @inproceedings{TargitayRothZinketal., author = {Targitay, Deniz and Roth, Lisa and Zink, Markus H. and K{\"u}chler, Andreas and Bier, Markus and Kobus, Maja and Geißler, Michael and Schlittler, Balz}, title = {An FEM simulation model of oil-pressboard insulating systems for HVDC transformers}, series = {23rd International Symposium on High Voltage Engineering (ISH 2023)}, booktitle = {23rd International Symposium on High Voltage Engineering (ISH 2023)}, publisher = {Institution of Engineering \& Technology}, pages = {7}, abstract = {In this contribution, a simulation model for the description of the nonlinear dielectric behaviour of an insulation system composed of mineral oil and oil-impregnated pressboard is presented. The model was verified by comparing the simulation results with electric field and current measurements. At the outset, the ideal case, where a homogeneous initial charge carrier distribution according to the definition of ohmic conductivity is present, is analysed to establish the preliminary foundations pertaining to a typical measurement. Following that, the influence of distinct charge carriers on the measured quantities are investigated by altering their parametrisations. In contrast to the ideal case, a real measurement reveals a current trend, that can be explained by an excess amount of initial charge carriers related to the oil-impregnated pressboard layers. Potential possibilities to the origin of the surplus are discussed. Furthermore, it is shown that the dissociable and intrinsic charge carriers alone can reconstruct the measured quantities in terms of the transient behaviour. This points out that, for the field strength studied here ( E ≤ 1 kV/mm ), the charging of the highly resistive pressboard barriers is dominated by the dissociation of charge carriers in the oil gaps.}, language = {en} } @article{Juengst, author = {J{\"u}ngst, Heike Elisabeth}, title = {Uwe-Michael Gutzschhahns {\"U}bersetzungen von Versromanen: Robert Paul Westons "Zorgamazoo" und Steven Herricks "By the River"}, series = {kjl\&m}, journal = {kjl\&m}, number = {1}, publisher = {kopaed-Verlag}, address = {M{\"u}nchen}, issn = {1864-144X}, pages = {57 -- 61}, language = {de} } @techreport{Wunderlich, type = {Working Paper}, author = {Wunderlich, Claudia}, title = {Remarks on Alajos Alois Unger's The Recapture of Győr 1598 (1840, Hungarian National Gallery) on the occasion of the 425th anniversary of the landmark event}, organization = {Claudia Wunderlich}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-24318}, pages = {11}, abstract = {The oil painting The Recapture of Győr 1598 (1840) is one of the two works by Alajos Alois Unger (Győr 1814-1848) in the collection of the Hungarian National Gallery since the 1970s. It depicts a landmark event in the Ottoman Wars that had an immense impact on the whole of Christian Europe, but outside of Hungary it has been largely forgotten. In the past two decades, considerable insight was gained into the obscure painter Unger, his works, family and networks. Playing-card maker M{\´a}ty{\´a}s Mathias Unger the Elder was his father and Alajos Unger must have been the designer behind the family's prized playing-cards. Unger was trained at the Imperial Academy of Arts in Vienna between 1833 and 1842, particularly under Leopold Kupelwieser and Johann Ender. All this new insight enables a more detailed interpretation of this history painting frequently displayed and its religious and political meaning. It is part of an unusual cycle of patriotic Hungarian artwork glorifying the House of Habsburg.}, language = {en} } @incollection{ZieglerIsingDobhanetal.2023, author = {Ziegler, Cedric C. and Ising, Julia and Dobhan, Alexander and Storath, Martin}, title = {Computer Vision in Reusable Container Management - Requirements, Conception, and Data Acquisition}, series = {Logistik und Supply Chain Management}, booktitle = {Logistik und Supply Chain Management}, publisher = {University of Bamberg Press}, isbn = {9783863099411}, issn = {2750-8277}, doi = {10.20378/irb-92408}, pages = {107 -- 122}, year = {2023}, abstract = {In container management, the reuse of small load carriers is a business alternative to disposal carriers. Reusable container management is furthermore a solution to improve the environmental impact of the logistic industry. The sorting and stock management of small load carriers are today primarily manual work and have consequently a low level of automation. In order to increase the automation of returnable containers, it is crucial to establish a computer vision system that (i) classifies the containers and (ii) detects potential defects or stains. This paper provides an overview and a discussion of the applications that are already in use. Object detection is necessary for many actions in the container management business processes, such as inventory and stock management. Detection of defects on the small load carrier is required for scrapping the carriers to ensure a smooth process in any business process involving the carrier and to decide whether additional process steps, e.g., cleaning, are required. The literature review in this paper establishes the demand for computer vision detection and shows the project setup necessary to conduct research in this area. The comparison with other applications of defect and anomaly detection supports the applicability and shows the need for further research in this specific academic field. This leads to a project outline and the research provides the technical implementation of the detections in container management. Accordingly, the research provides a work- flow guide from data acquisition to a high-quality dataset of labeled anomalies of small load carriers.}, language = {en} } @misc{Knaack, type = {Master Thesis}, author = {Knaack, Simon Tobias}, title = {Nachhaltigkeitsberichterstattung in der Praxis: Wie Chemiekonzerne die Basis f{\"u}r glaubw{\"u}rdige Nachhaltigkeitskommunikation schaffen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-33641}, school = {Hochschule f{\"u}r Angewandte Wissenschaften W{\"u}rzburg-Schweinfurt}, pages = {80}, abstract = {F{\"u}r Großunternehmen ist die Nachhaltigkeitskommunikation l{\"a}ngst keine Nebendisziplin mehr. Was vor 20 Jahren noch als Nischenthema galt, ist heute eines der wichtigsten Strategiethemen f{\"u}r Unternehmen. Die Chemieindustrie steht vor der kommunikativen Herausforderung die Nachhaltigkeitsleistung aus den hoch komplexen Wertsch{\"o}pfungsketten f{\"u}r eine breite {\"O}ffentlichkeit verst{\"a}ndlich aufzubereiten. Eine Fokussierung auf wesentliche Kennzahlen und Themen ist dabei unerl{\"a}sslich. Aufgrund der herausragenden Bedeutung des Themas f{\"u}r die Unternehmen, aber auch f{\"u}r die Gesellschaft an sich, bedarf es der Erstellung und Ausspielung von m{\"o}glichst hochwertigem und zweckvollem Content seitens der Unternehmen.}, language = {de} } @article{StorathWeinmann, author = {Storath, Martin and Weinmann, Andreas}, title = {Smoothing Splines for Discontinuous Signals}, series = {Journal of Computational and Graphical Statistics}, volume = {33}, journal = {Journal of Computational and Graphical Statistics}, number = {2}, publisher = {Informa UK Limited}, issn = {1061-8600}, doi = {10.1080/10618600.2023.2262000}, pages = {651 -- 664}, language = {en} } @inproceedings{Diethelm, author = {Diethelm, Kai}, title = {A New Diffusive Representation for Fractional Derivatives, Part I: Construction, Implementation and Numerical Examples}, series = {Fractional Differential Equations: Modeling, Discretization, and Numerical Solvers}, booktitle = {Fractional Differential Equations: Modeling, Discretization, and Numerical Solvers}, editor = {Cardone, Angelamaria and Donatelli, Marco and Durastante, Fabio and Garrappa, Roberto and Mazza, Mariarosa and Popolizio, Marina}, publisher = {Springer}, address = {Singapore}, isbn = {978-981-19-7715-2}, doi = {10.1007/978-981-19-7716-9_1}, pages = {1 -- 15}, abstract = {Diffusive representations of fractional derivatives have proven to be useful tools in the construction of fast and memory efficient numerical methods for solving fractional differential equations. A common challenge in many of the known variants of this approach is that they require the numerical approximation of some integrals over an unbounded integral whose integrand decays rather slowly, which implies that their numerical handling is difficult and costly. We present a novel variant of such a diffusive representation. This form also requires the numerical approximation of an integral over an unbounded domain, but the integrand decays much faster. This property allows to use well established quadrature rules with much better convergence properties.}, language = {en} } @inproceedings{Diethelm, author = {Diethelm, Kai}, title = {Diffusive Representations for the Numerical Evaluation of Fractional Integrals}, series = {Proceeding of the 2023 International Conference on Fractional Differentiation and its Applications (ICFDA)}, booktitle = {Proceeding of the 2023 International Conference on Fractional Differentiation and its Applications (ICFDA)}, publisher = {IEEE}, address = {Piscataway}, doi = {10.48550/arXiv.2301.11931}, pages = {6}, abstract = {Diffusive representations of fractional differential and integral operators can provide a convenient means to construct efficient numerical algorithms for their approximate evaluation. In the current literature, many different variants of such representations have been proposed. Concentrating on Riemann-Liouville integrals whose order is in (0,1), we here present a general approach that comprises most of these variants as special cases and that allows a detailed investigation of the analytic properties of each variant. The availability of this information allows to choose concrete numerical methods for handling the representations that exploit the specific properties, thus allowing to construct very efficient overall methods.}, language = {en} }