@book{OPUS4-4994, title = {Audiovisuelle {\"U}bersetzung - Filmuntertitelung in Deutschland, Portugal und Tschechien}, editor = {J{\"u}ngst, Heike Elisabeth and Nagel, Silke and Hezel, Susanne and Hinderer, Katharina and Pieper, Kathrin}, publisher = {Lang}, address = {Frankfurt/Main}, isbn = {978-3-631-58141-4}, pages = {476}, language = {de} } @incollection{Juengst, author = {J{\"u}ngst, Heike Elisabeth}, title = {Sachcomics}, series = {Lexikon der Comics}, booktitle = {Lexikon der Comics}, number = {Erg.Lfg. M{\"a}rz 2008}, editor = {Czerwionka, Markus}, publisher = {Corian-Verlag}, address = {Meitingen}, isbn = {3-89048-900-1}, language = {de} } @unpublished{DiethelmHashemishahrakiThaietal., author = {Diethelm, Kai and Hashemishahraki, Safoura and Thai, Ha Duc and Tuan, Hoang The}, title = {A constructive approach for investigating the stability of incommensurate fractional differential systems}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-51954}, pages = {21}, abstract = {This paper is devoted to studying the asymptotic behaviour of solutions to generalized noncommensurate fractional systems. To this end, we first consider fractional systems with rational orders and introduce a criterion that is necessary and sufficient to ensure the stability of such systems. Next, from the fractional-order pseudospectrum definition proposed by Sanca et al., we formulate the concept of a rational approximation for the fractional spectrum of a noncommensurate fractional systems with general, not necessarily rational, orders. Our first important new contribution is to show the equivalence between the fractional spectrum of a noncommensurate linear system and its rational approximation. With this result in hand, we use ideas developed in our earlier work to demonstrate the stability of an equilibrium point to nonlinear systems in arbitrary finite-dimensional spaces. A second novel aspect of our work is the fact that the approach is constructive. Finally, we give numerical simulations to illustrate the merit of the proposed theoretical results.}, language = {en} } @unpublished{ChaudharyDiethelm, author = {Chaudhary, Renu and Diethelm, Kai}, title = {Revisiting diffusive representations for enhanced numerical approximation of fractional integrals}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-51989}, pages = {6}, abstract = {This study reexamines diffusive representations for fractional integrals with the goal of pioneering new variants of such representations. These variants aim to offer highly efficient numerical algorithms for the approximate computation of fractional integrals. The approach seamlessly aligns with established techniques used in addressing problems involving integer-order operators, contributing to a unified framework for numerical solutions.}, language = {en} } @unpublished{DiethelmHashemishahrakiThaietal., author = {Diethelm, Kai and Hashemishahraki, Safoura and Thai, Ha Duc and Tuan, Hoang The}, title = {Stability properties of multi-order fractional differential systems in 3D}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-51960}, pages = {6}, abstract = {This paper is devoted to studying three-dimensional non-commensurate fractional order differential equation systems with Caputo derivatives. Necessary and sufficient conditions are for the asymptotic stability of such systems are obtained.}, language = {en} } @unpublished{ChaudharyDiethelm, author = {Chaudhary, Renu and Diethelm, Kai}, title = {Novel variants of diffusive representation of fractional integrals: Construction and numerical computation}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-51975}, pages = {6}, abstract = {In this paper, we revisit the diffusive representations of fractional integrals established in Diethelm (2023a) to explore novel variants of such representations which provide highly efficient numerical algorithms for the approximate numerical evaluation of fractional integrals.}, language = {en} } @article{HoefflinSauerSchiffleretal., author = {H{\"o}fflin, Dennis and Sauer, Christian and Schiffler, Andreas and Hartmann, J{\"u}rgen}, title = {Process Monitoring Using Synchronized Path Infrared Thermography in PBF-LB/M}, series = {Sensors}, volume = {22}, journal = {Sensors}, number = {16}, publisher = {MDPI}, doi = {10.3390/s22165943}, pages = {5943}, abstract = {Additive manufacturing processes, particularly Laser-Based Powder Bed Fusion of Metals (PBF-LB/M), enable the development of new application possibilities due to their manufacturing-specific freedom of design. These new fields of application require a high degree of component quality, especially in safety-relevant areas. This is currently ensured primarily via a considerable amount of downstream quality control. Suitable process monitoring systems promise to reduce this effort drastically. This paper introduces a novel monitoring method in order to gain process-specific thermal information during the manufacturing process. The Synchronized Path Infrared Thermography (SPIT) method is based on two synchronized galvanometer scanners allowing high-speed and high-resolution observations of the melt pool in the SWIR range. One scanner is used to steer the laser over the building platform, while the second scanner guides the field of view of an IR camera. With this setup, the melting process is observed at different laser powers, scan speeds and at different locations with respect to the laser position, in order to demonstrate the positioning accuracy of the system and to initially gain thermal process data of the melt pool and the heat-affected zone. Therefore, the SPIT system shows a speed independent overall accuracy of ±2 Pixel within the evaluated range. The system further allows detailed thermal observation of the melt pool and the surrounding heat-affected zone.}, language = {en} } @article{HoefflinHartmannRosiliusetal., author = {H{\"o}fflin, Dennis and Hartmann, J{\"u}rgen and Rosilius, Maximilian and Seitz, Philipp and Schiffler, Andreas}, title = {Opto-Thermal Investigation of Additively Manufactured Steel Samples as a Function of the Hatch Distance}, series = {Sensors}, volume = {22}, journal = {Sensors}, number = {1}, publisher = {MDPI}, issn = {1424-8220}, doi = {10.3390/s22010046}, pages = {46}, abstract = {Nowadays, additive manufacturing processes are becoming more and more appealing due to their production-oriented design guidelines, especially with regard to topology optimisation and minimal downstream production depth in contrast to conventional technologies. However, a scientific path in the areas of quality assurance, material and microstructural properties, intrinsic thermal permeability and dependent stress parameters inhibits enthusiasm for the potential degrees of freedom of the direct metal laser melting process (DMLS). Especially in quality assurance, post-processing destructive measuring methods are still predominantly necessary in order to evaluate the components adequately. The overall objective of these investigations is to gain process knowledge make reliable in situ statements about component quality and material properties based on the process parameters used and emission values measured. The knowledge will then be used to develop non-destructive tools for the quality management of additively manufactured components. To assess the effectiveness of the research design in relation to the objectives for further investigations, this pre-study evaluates the dependencies between the process parameters, process emission during manufacturing and resulting thermal diffusivity and the relative density of samples fabricated by DMLS. Therefore, the approach deals with additively built metal samples made on an EOS M290 apparatus with varying hatch distances while simultaneously detecting the process emission. Afterwards, the relative density of the samples is determined optically, and thermal diffusivity is measured using the laser flash method. As a result of this pre-study, all interactions of the within factors are presented. The process variable hatch distance indicates a strong influence on the resulting material properties, as an increase in the hatch distance from 0.11 mm to 1 mm leads to a drop in relative density of 57.4\%. The associated thermal diffusivity also reveals a sharp decrease from 5.3 mm2/s to 1.3 mm2/s with growing hatch distances. The variability of the material properties can also be observed in the measured process emissions. However, as various factors overlap in the thermal radiation signal, no clear assignment is possible within the scope of this work.}, language = {en} } @misc{Wunderlich, author = {Wunderlich, Claudia}, title = {Empirical Methods in Discourse Analysis and the Internet}, volume = {9/2}, publisher = {Constantine the Philosopher University in Nitra, Faculty of Arts}, address = {Nitra, Slowakei}, organization = {Constantine the Philosopher University in Nitra, Faculty of Arts}, issn = {1337-7590}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43388}, pages = {4}, abstract = {Discourse analysis has greatly relied on the tried and tested methods of data collection as well as on the use of traditional corpora. The question therefore arises as to how far the Internet has changed methodology in discourse analysis and to what degree it will do so in the future. A further issue that results from the possibilities the Web offers is whether traditional corpora will still be necessary to thoroughly investigate the structure and functioning of language and discourse, with regard to both native and non-native speech. In this paper the opportunities the Internet offers, the availability of tools to the researcher in using the Internet in DA but also the limits and dangers the linguist is prone to encounter will be investigated. And finally it will be discussed whether traditional empirical methods will still play any role in discourse analysis in future.}, language = {en} } @article{DiethelmGarrappaStynes, author = {Diethelm, Kai and Garrappa, Roberto and Stynes, Martin}, title = {Why fractional derivatives with nonsingular kernels should not be used}, series = {Fractional Calculus and Applied Analysis}, volume = {23}, journal = {Fractional Calculus and Applied Analysis}, doi = {https://doi.org/10.1515/fca-2020-0032}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-20666}, pages = {610 -- 634}, abstract = {In recent years, many papers discuss the theory and applications of new fractional-order derivatives that are constructed by replacing the singular kernel of the Caputo or Riemann-Liouville derivative by a non-singular (i.e., bounded) kernel. It will be shown here, through rigorous mathematical reasoning, that these non-singular kernel derivatives suffer from several drawbacks which should forbid their use. They fail to satisfy the fundamental theorem of fractional calculus since they do not admit the existence of a corresponding convolution integral of which the derivative is the left-inverse; and the value of the derivative at the initial time t = 0 is always zero, which imposes an unnatural restriction on the differential equations and models where these derivatives can be used. For the particular cases of the so-called Caputo-Fabrizio and Atangana-Baleanu derivatives, it is shown that when this restriction holds the derivative can be simply expressed in terms of integer derivatives and standard Caputo fractional derivatives, thus demonstrating that these derivatives contain nothing new.}, language = {en} } @article{DiethelmFord, author = {Diethelm, Kai and Ford, Neville J.}, title = {A note on the well-posedness of terminal value problems for fractional differential equations}, series = {Journal of Integral Equations and Applications}, volume = {30}, journal = {Journal of Integral Equations and Applications}, number = {3}, doi = {10.1216/JIE-2018-30-3-371}, pages = {371 -- 376}, abstract = {This note is intended to clarify some important points about the well-posedness of terminal value problems for fractional differential equations. It follows the recent publication of a paper by Cong and Tuan in this journal, in which a counter-example calls into question the earlier results in a paper by this note's authors. Here, we show in the light of these new insights, that a wide class of terminal value problems of fractional differential equations is well posed, and we identify those cases where the well-posedness question must be regarded as open.}, language = {en} } @incollection{KjeldsbergSchoeneGerndtetal., author = {Kjeldsberg, Per Gunnar and Sch{\"o}ne, Robert and Gerndt, Michael and Diethelm, Kai and Ř{\´i}ha, Lubom{\´i}r and Kannan, Venkatesh and Sawley, Marie-Christine and Zapletal, Jan and Gocht, Andreas and Reissmann, Nico and Vysocky, Ondrei and Kumaraswamy, Madhura and Nagel, Wolfgang E.}, title = {Run-Time Exploitation of Application Dynamism for Energy-Efficient Exascale Computing}, series = {System-Scenario-based Design Principles and Applications}, booktitle = {System-Scenario-based Design Principles and Applications}, editor = {Catthoor, Francky and Basten, Twan and Zompakis, Nikolaos and Geilen, Marc and Kjeldsberg, Per Gunnar}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-20342-9}, doi = {10.1007/978-3-030-20343-6_6}, pages = {113 -- 126}, abstract = {As in the embedded systems domain, energy efficiency has recently become one of the main design criteria in high performance computing. The European Union Horizon 2020 project READEX (Run-time Exploitation of Application Dynamism for Energy-efficient eXascale computing) has developed a tools-aided auto-tuning methodology inspired by system scenario based design. Applying similar concepts as those presented in earlier chapters of this book, the dynamic behavior of HPC applications is exploited to achieve improved energy efficiency and performance. Driven by a consortium of European experts from academia, HPC resource providers, and industry, the READEX project has developed the first generic framework of its kind for split design-time and run-time tuning while targeting heterogeneous systems at the Exascale level. Using a real-life boundary element application, energy savings of more than 30\% can be shown.}, language = {en} } @article{DiethelmGarrappaStynes, author = {Diethelm, Kai and Garrappa, Roberto and Stynes, Martin}, title = {Good (and Not So Good) Practices in Computational Methods for Fractional Calculus}, series = {Mathematics}, volume = {8}, journal = {Mathematics}, doi = {10.3390/math8030324}, abstract = {The solution of fractional-order differential problems requires in the majority of cases the use of some computational approach. In general, the numerical treatment of fractional differential equations is much more difficult than in the integer-order case, and very often non-specialist researchers are unaware of the specific difficulties. As a consequence, numerical methods are often applied in an incorrect way or unreliable methods are devised and proposed in the literature. In this paper we try to identify some common pitfalls in the use of numerical methods in fractional calculus, to explain their nature and to list some good practices that should be followed in order to obtain correct results.}, 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} } @incollection{Diethelm, author = {Diethelm, Kai}, title = {General theory of Caputo-type fractional differential equations}, series = {Handbook of Fractional Calculus with Applications, Vol. 2: Fractional Differential Equations}, booktitle = {Handbook of Fractional Calculus with Applications, Vol. 2: Fractional Differential Equations}, editor = {Kochubei, Anatoli and Luchko, Yuri}, publisher = {De Gruyter}, address = {Berlin}, doi = {10.1515/9783110571660-001}, pages = {1 -- 20}, abstract = {This article describes the fundamentals of the theory of ordinary fractional differential equations of Caputo's type. Starting from the existence and uniqueness of solutions and the well-posedness in general, the flow of topics continues via a derivation of explicit solution formulas for certain important classes of problems and the discussion of their smoothness properties to the stability properties of these solutions. The main focus is on initial value problems, but terminal value problems are briefly considered as well. In addition to dealing with standard single-order problems, the presentation also contains a short discussion of multiterm equations and multiorder systems.}, language = {en} } @article{Diethelm, author = {Diethelm, Kai}, title = {Numerical Methods for the Fractional Differential Equations of Viscoelasticity}, series = {Encyclopedia of Continuum Mechanics}, journal = {Encyclopedia of Continuum Mechanics}, editor = {Altenbach, Holm and {\"O}chsner, Andreas}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-662-53605-6}, doi = {10.1007/978-3-662-53605-6_89-1}, pages = {1 -- 12}, abstract = {Mathematical models based on differential operators of fractional order have proven to be very useful for describing the properties of viscoelastic materials. However, the associated differential equations can usually not be solved analytically. In this article, we provide a survey of the most important numerical methods. We restrict our attention to those types of fractional differential equations that are most important in the context of viscoelasticity, i.e., we discuss numerical methods for ordinary fractional differential equations and for certain types of time-fractional partial differential equations. Space-fractional partial differential equations are not discussed.}, language = {en} } @incollection{Diethelm, author = {Diethelm, Kai}, title = {Fundamental approaches for the numerical handling of fractional operators and time-fractional differential equations}, series = {Handbook of Fractional Calculus with Applications, Vol. 3: Numerical Methods}, booktitle = {Handbook of Fractional Calculus with Applications, Vol. 3: Numerical Methods}, editor = {Karniadakis, George Em}, publisher = {De Gruyter}, address = {Berlin}, doi = {10.1515/9783110571684-001}, pages = {1 -- 22}, abstract = {This article describes fundamental approaches for the numerical handling of problems arising in fractional calculus. This includes, in particular, methods for approximately computing fractional integrals and fractional derivatives, where the emphasis is placed on Caputo operators, as well as solvers for the associated differential and integral equations.}, 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 = {Fast Solution Methods for Fractional Differential Equations in the Modeling of Viscoelastic Materials}, series = {2021 9th International Conference on Systems and Control (ICSC)}, booktitle = {2021 9th International Conference on Systems and Control (ICSC)}, publisher = {IEEE}, doi = {10.1109/ICSC50472.2021.9666636}, pages = {455 -- 460}, abstract = {Fractional order models have proven to be a very useful tool for the modeling of the mechanical behaviour of viscoelastic materials. Traditional numerical solution methods exhibit various undesired properties due to the non-locality of the fractional differential operators, in particular regarding the high computational complexity and the high memory requirements. The infinite state representation is an approach on which one can base numerical methods that overcome these obstacles. Such algorithms contain a number of parameters that influence the final result in nontrivial ways. Based on numerical experiments, we initiate a study leading to good choices of these parameters.}, language = {en} } @article{DiethelmKitzingPicardetal., author = {Diethelm, Kai and Kitzing, Konrad and Picard, Rainer and Siegmund, Stefan and Trostorff, Sascha and Waurick, Marcus}, title = {A Hilbert Space Approach to Fractional Differential Equations}, series = {Journal of Dynamics and Differential Equations}, volume = {34}, journal = {Journal of Dynamics and Differential Equations}, doi = {10.1007/s10884-020-09932-6}, pages = {481 -- 504}, abstract = {We study fractional differential equations of Riemann-Liouville and Caputo type in Hilbert spaces. Using exponentially weighted spaces of functions defined on R, we define fractional operators by means of a functional calculus using the Fourier transform. Main tools are extrapolation- and interpolation spaces. Main results are the existence and uniqueness of solutions and the causality of solution operators for non-linear fractional differential equations.}, language = {en} } @article{DamelinDiethelm, author = {Damelin, Steven B. and Diethelm, Kai}, title = {An Analytic and Numerical Analysis of Weighted Singular Cauchy Integrals with Exponential Weights on ℝ}, series = {Numerical Functional Analysis and Optimization}, volume = {43}, journal = {Numerical Functional Analysis and Optimization}, number = {13}, doi = {10.1080/01630563.2022.2112051}, pages = {1538 -- 1577}, abstract = {This article concerns an analytic and numerical analysis of a class of weighted singular Cauchy integrals with exponential weights w:= exp (-Q) with finite moments and with smooth external fields Q:R→[0,∞), with varying smooth convex rate of increase for large argument. Our analysis relies in part on weighted polynomial interpolation at the zeros of orthonormal polynomials with respect to w2. We also study bounds for the first derivatives of a class of functions of the second kind for w2.}, language = {en} } @article{Diethelm, author = {Diethelm, Kai}, title = {A New Diffusive Representation for Fractional Derivatives, Part II: Convergence Analysis of the Numerical Scheme}, series = {Mathematics}, volume = {10}, journal = {Mathematics}, number = {8}, doi = {10.3390/math10081245}, abstract = {Recently, we have proposed a new diffusive representation for fractional derivatives and, based on this representation, suggested an algorithm for their numerical computation. From the construction of the algorithm, it is immediately evident that the method is fast and memory-efficient. Moreover, the method's design is such that good convergence properties may be expected. In this paper, we commence a systematic investigation of these convergence properties.}, language = {en} } @misc{Wunderlich, author = {Wunderlich, Claudia}, title = {A győri Unger csal{\´a}d: t{\´a}rsadalmi szemiotika, politikai ikonogr{\´a}fia {\´e}s a 19. sz{\´a}zadi j{\´a}t{\´e}kk{\´a}rtyak{\´e}sz{\´i}t{\´e}s}, series = {Ethnographia}, volume = {133/3}, journal = {Ethnographia}, publisher = {Ungarische Volkskundegesellschaft}, address = {Budapest}, organization = {Ungarische Volkskundegesellschaft, Ungarisches Volkskundemuseum Budapest, Ungarische Akademie der Wissenschaften}, issn = {0014-1798}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43640}, pages = {22}, abstract = {The Unger Family from Győr: The Social Semiotics, Political Iconography and Manufacture of their 19th Century Playing Cards M{\´a}ty{\´a}s (Mathias) Unger the Elder (1789-1862) and his eponymous son M{\´a}ty{\´a}s (Mathias) the Younger (1824-1878) from Győr are prominent in the history of the Hungarian playing cards. Due to more recent research, new details about the family and their playing cards have surfaced. This includes the fact that another son of M{\´a}ty{\´a}s Unger the Elder was Alajos (Alois) Unger (1814-1848), an academic painter trained at the Vienna Academy of Arts, particularly under Leopold Kupelwieser and Johann Ender, in late Nazarene, late Romantic style. New findings on the Unger playing cards are presented drawing on social semiotics and its relationship to political iconography, whereby cards are considered as text and the two categories of denotation and connotation pivotal. Change in connotation and meaning is analysed to provide further explanation for how the four season cards, i.e. Tell cards (magyar k{\´a}rtya), today's standard pattern, came about with lost Unger playing cards serving as a missing link. These Unger cards reflected the art policy of the Austrian Empire of the time as image propaganda for the Casa d'Austria linked with the pietas austriaca/hungarica, in line with Alajos Unger's oil paintings. Over time, the connotation of the Tell cards changed into a clear anti-Habsburg stance. Further reasons for why this pattern became standard in Hungary and how the four seasoned D{\"a}user cards, popularized by the Ungers, must have become part of it are also given. Against this background, a novel bottom-up material flow simulation approach is proposed to investigate the artisanal playing card production process, output and profitability of the small workshop of the Ungers together with a research agenda for adapting it to the building and conditions of the last known production site, all on the basis of a reconstruction.}, language = {mul} } @article{GuennelHerzog, author = {G{\"u}nnel, Andreas and Herzog, Roland}, title = {Optimal Control Problems in Finite-Strain Elasticity by Inner Pressure and Fiber Tension}, series = {Frontiers in Applied Mathematics and Statistics}, volume = {2}, journal = {Frontiers in Applied Mathematics and Statistics}, doi = {10.3389/fams.2016.00004}, abstract = {Optimal control problems for finite-strain elasticity are considered. An inner pressure or an inner fiber tension is acting as a driving force. Such internal forces are typical, for instance, for the motion of heliotropic plants, and for muscle tissue. Non-standard objective functions relevant for elasticity problems are introduced. Optimality conditions are derived on a formal basis, and a limited-memory quasi-Newton algorithm for their solution is formulated in function space. Numerical experiments confirm the expected mesh-independent performance.}, language = {en} } @article{MakowskiHerzog, author = {Makowski, Andreas and Herzog, Roland}, title = {Optimal Control of Large Deformation Elasticity by Fiber Tension}, series = {Proceedings in Applied Mathematics and Mechanics}, volume = {2014}, journal = {Proceedings in Applied Mathematics and Mechanics}, number = {14}, doi = {10.1002/pamm.201410420}, pages = {879 -- 880}, abstract = {Object of our interest is an elastic body Ω ⊂ ℝ3 which we can deform by applying a tension along certain given short fibers inside the body. The deformation of the body is desribed by a hyperelastic model with polyconvex energy density and a special energy functional for the tension along the fibers. We seek to apply (possibly large) deformations to the body so that a desired shape is obtained. To this end, we formulate an optimal control problem for the fiber tension field.}, language = {en} } @inproceedings{Claudia, author = {Claudia, Wunderlich}, title = {Teaching Intercultural Skills through a Global Business Simulation}, editor = {Ministerium f{\"u}r ausw{\"a}rtige Angelegenheiten der Ukraine, Diplomatische Akademie der Ukraine}, publisher = {Diplomatische Akademie der Ukraine}, address = {Kiev}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43432}, pages = {264}, abstract = {This paper reports on how intercultural skills can be taught in English for Specific Purposes courses (ESP) in addition to reading, writing, listening, and speaking skills in a global business simulation}, language = {en} } @misc{Wunderlich, author = {Wunderlich, Claudia}, title = {K{\´e}sőnazar{\´e}nus, k{\´e}ső romantikus {\´e}s k{\´a}rtyatervező: a Kupelwieser-tan{\´i}tv{\´a}ny Unger Alajos {\´u}jrafelfedez{\´e}se}, series = {Arrabona}, volume = {50/2}, journal = {Arrabona}, publisher = {Fl{\´o}ris-R{\´o}mer-Museum Gy{\"o}r}, address = {Gy{\"o}r}, organization = {Fl{\´o}ris-R{\´o}mer-Museum Gy{\"o}r}, issn = {571-1304}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43519}, pages = {56}, abstract = {Alajos (Alois) Unger, who was descended from the well-known Unger playing- card making family from Győr, is a recently rediscovered Hungarian late Nazarene and late Romanticist artist. The son and brother of the playing-card makers M{\´a}ty{\´a}s (Mathias) Unger the Elder (1789-1862) and Younger (1824-78), he was originally apprenticed in this craft as well and, as could be proved for the first time, designed the family's playing-cards. First trained at the National Drawing School of his hometown under J{\´a}nos Hofbauer (creator of The Castle of D{\´e}v{\´e}ny, Hungarian National Gallery), which apprentices and journeymen of the local crafts attended, Alajos Unger enrolled at the Vienna Academy of Fine Arts first in 1833 to train there as a draughtsman and then became a pupil of Leopold Kupelwieser (1796-1862) from 1836 until 1842. Among his classmates were the famous artists Eduard von Engerth (1818-97), Franz Josef Dobiaschofsky (1818-67), Ferenc Szoldatits (1820-1916) and August von Pettenkofen (1822-1889). In an art exhibition in Győr in 1903 the quality of Unger's genre paintings displayed there was likened to those of the latter. It has now been possible to demonstrate how strongly his art was rooted in the late Nazarene and late Romanticist tradition of the circle around his teacher. Overall, his style not only reflects the ''literary-musical-artistic" orientation of Kupelwieser, but also the "fairytale-like-poetical" variety represented by Joseph von F{\"u}hrich and particularly Moritz von Schwind. Alajos Unger had until recently only been known by name, but with the present article, a fuller picture of the artist's life and work has been presented. Thus, apart from the two oil paintings, which came into the possession of the Hungarian National Gallery in the 1970s, The Recapture ofRaab (1840) and a portrait of the artist and his family (1843), a series of hitherto unknown oilworks has been discovered: a portrait of an unknown lady (1836), now part of the art collection of the University of Pennsylvania, a copy of Cesare da Sesto's La vierge au bas-relief (date unknown), the Baptism of Vajk (1842) and a Biedermeier picture clock depicting a patriotic scene from the opera Lucia di Lammermoor set against the backdrop of a veduta of Venice (1847). The portrait of Ferenc Hergeszell, a local politician from Unger's hometown and later member of the Hungarian Diet, from 1841, now in the collection of the Fl{\´o}ris R{\"o}mer Museum in Győr, also bears Unger's painterly handwriting. Altogether, the torso of the extraordinary work of a representative of a younger generation of Nazarenes, who promoted Hungarian national art, has been unveiled in the bicentenary of his birth. In addition to this, the role of Nazarene artists and that of their networks in the development of Hungarian art generally was investigated.}, language = {mul} } @inproceedings{Wunderlich, author = {Wunderlich, Claudia}, title = {The influence of Nazarene Art on the development of Hungarian national art and the crafts. The academic painter Alajos (Alois) Unger (Bap Győr 29 Oct 1814 - Győr 28 Dec 1848)}, editor = {Wunderlich, Claudia}, publisher = {SZTE BTK N{\´e}prajzi {\´e}s Kultur{\´a}lis Antropol{\´o}giai Tansz{\´e}k}, address = {Szeged}, isbn = {978-963-306-260-9}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43529}, pages = {37}, abstract = {This paper will deals with the Nazarene Movement and its art in Hungary with special reference to Alajos (Alois) Unger, a recently rediscovered artist of Hungary's Reform Era, his links to Nazarene art, the relevance of (functional) semiotics in the interpretation of Nazarene works and the influence of the Nazarene Movement on the arts and crafts of the 19th century. This includes the design of new playing-card patterns in Hungary}, language = {en} } @misc{Wunderlich, author = {Wunderlich, Claudia}, title = {THE ICONOGRAPHY, DESIGN AND MANUFACTURE OF THE 19 TH CENTURY PLAYING-CARDS BY THE UNGER FAMILY FROM GYŐR}, series = {Acta Ethnographica Hungarica}, volume = {57/2}, journal = {Acta Ethnographica Hungarica}, publisher = {Hungarian Academy of Sciences}, address = {Budapest}, organization = {Hungarian Academy of Sciences}, issn = {1216-9803}, doi = {10.1556/AEthn.57.2012.2.4}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-43509}, pages = {22}, abstract = {The present article offers new evidence on the Unger playing-card making family of Győr,Western Transdanubia, as the result of a cross-disciplinary study. M{\´a}ty{\´a}s Unger the Elder (1789-1862) andhis like-named son M{\´a}ty{\´a}s the Younger (1824-1878) produced various types of playing-cards from theearly to mid-19th century. In particular, their cards, their iconography, design and production process will beanalysed. The family is best known for their cards with Sopron (Oedenburg) pattern. Also discussed will bethe role of M{\´a}ty{\´a}s the Elder's second eldest son Alajos Unger as a possible designer of the later Unger cards,which were of considerably higher quality than the earlier known ones by M{\´a}ty{\´a}s Unger the Elder. Thehitherto little-known Alajos Unger was trained as a draughtsman and painter first at the National DrawingSchool of his hometown and then, between 1833 and 1842, at the Vienna Academy of Fine Arts, particularlyunder Leopold Kupelwieser (1796-1862). Finally an innovative outside-in bottom-up method for gainingfurther, reliable insight into 19thcentury artisanal playing-card manufacturing will be proposed to determinethe size, output and profitability of the Unger workshop based on material-flow simulation.}, language = {en} } @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} } @article{Bier, author = {Bier, Markus}, title = {Non-equilibrium steady states of electrolyte interfaces}, series = {New Journal of Physics}, volume = {26}, journal = {New Journal of Physics}, number = {1}, pages = {013008}, abstract = {The non-equilibrium steady states of a semi-infinite quasi-one-dimensional univalent binary electrolyte solution, characterised by non-vanishing electric currents, are investigated by means of Poisson-Nernst-Planck (PNP) theory. Exact analytical expressions of the electric field, the charge density and the number density are derived, which depend on the electric current density as a parameter. From a non-equilibrium version of the Grahame equation, which relates the total space charge per cross-sectional area and the corresponding contribution of the electric potential drop, the current-dependent differential capacitance of the diffuse layer is derived. In the limit of vanishing electric current these results reduce to those within Gouy-Chapman theory. It is shown that improperly chosen boundary conditions lead to non-equilibrium steady state solutions of the PNP equations with negative ion number densities. A necessary and sufficient criterion on surface conductivity constitutive relations is formulated which allows one to detect such unphysical solutions.}, language = {en} } @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{StorathWeinmann2024, author = {Storath, Martin and Weinmann, Andreas}, title = {Solving higher-order Mumford-Shah models}, series = {INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: ICNAAM2022}, booktitle = {INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: ICNAAM2022}, publisher = {AIP Publishing}, issn = {0094-243X}, doi = {10.1063/5.0210598}, year = {2024}, 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 = {https://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} } @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} } @misc{OPUS4-1913, title = {FHWS Science Journal (5, 1)}, volume = {5 (2021)}, number = {1}, editor = {Grebner, Robert}, address = {W{\"u}rzburg}, organization = {Hochschule f{\"u}r Angewandte Wissenschaften W{\"u}rzburg-Schweinfurt}, issn = {2196-6095}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-19135}, pages = {116}, abstract = {[D]ie Beitr{\"a}ge im vorliegenden FHWS Science Journal [dienen] dazu, einen Ein- und {\"U}berblick {\"u}ber eine Auswahl erfolgreicher Maßnahmen zu geben, die im Rahmen des BEST-FIT-Projektes entwickelt wurden und die erarbeiteten Methoden, Konzepte und Ergebnisse mit interessierten Lehrenden zu teilen. Nur wenn es gelingt, erfolgreiche Maßnahmen auch nach dem Ende der F{\"o}rderperiode an der FHWS weiterzuf{\"u}hren und auf weitere Studieng{\"a}nge und Fakult{\"a}ten zu {\"u}bertragen, k{\"o}nnen die Ziele von BEST-FIT und insgesamt des Qualit{\"a}tspakts Lehre nachhaltig und dauerhaft erreicht und gesichert werden.}, language = {de} } @techreport{Wunderlich, type = {Working Paper}, author = {Wunderlich, Claudia}, title = {M A K Halliday's Systemic Functional Linguistics and the Hermeneutic Spiral: Interpreting Alajos Unger's late Nazarene painting Baptism of Vajk (1842)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-57169}, pages = {20}, abstract = {Michael O'Toole's functional semiotic model based on Hallidayan linguistics is applied to a hermeneutic analysis of 19th century art of the Austrian Empire. The obscure painter Alajos Unger (1814-1848) from Győr, Hungary, was the son of playing-card maker M{\´a}ty{\´a}s Unger the Elder (1789-1862) and a designer of award-winning playing cards during Vorm{\"a}rz (the Reform Era in Hungary). He trained at the Vienna Art Academy, and two of his paintings (The recapture of Győr 1598, 1840; Family portrait, 1843) are in the collection of the Hungarian National Gallery. His Baptism of Vajk (1842) is the only such Nazarene history painting known in Hungarian art. Nazarene art, recently reappraised as modern, conceptual art, influenced the British Pre-Raphaelites and thus modern Hungarian art. Due to its symbolic nature, it is ideal for functional semiotic interpretation. Such an analysis of Unger's Baptism of Vajk identifies its patriotic, yet conservative, Catholic pro-Habsburg stance promoting dynastic piety (Pietas Hungarica) and a supra-national, cosmopolitan stance opposed to nationalist rhetoric as part of a cycle of paintings created by the artist.}, language = {en} } @misc{Strauss, type = {Master Thesis}, author = {Strauß, Sebastian}, title = {Qualit{\"a}tsstandards im wirtschaftspolitischen Journalismus}, editor = {Fr{\"u}hbrodt, Prof. Dr. Lutz}, address = {W{\"u}rzburg}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:863-opus-57209}, school = {Technische Hochschule W{\"u}rzburg-Schweinfurt}, pages = {121}, abstract = {Im Jahr 2023 dominierte kaum ein wirtschaftspolitisches Thema die {\"o}ffentliche Debatte so stark wie die Novellierung des Geb{\"a}udeenergiegesetzes (GEG). Die vorliegende Forschungsarbeit widmet sich der Untersuchung der medialen Darstellung dieses Gesetzesentwurfs und analysiert die vorherrschenden Diskurspositionen in der {\"o}ffentlichen Debatte. Ziel ist es, Qualit{\"a}tsstandards f{\"u}r die wirtschaftspolitische Berichterstattung bei kontroversen Themen abzuleiten und einen praxisorientierten Leitfaden f{\"u}r Journalisten zu entwickeln. Unter Anwendung der Wissenssoziologischen Diskursanalyse nach Keller werden Artikel aus BILD, taz, F.A.Z. und SZ empirisch analysiert. Die Ergebnisse zeigen vier dominante Diskurspositionen: „ausgewogen-sachlich" (38,02\%), „kritisch-sachlich" (24,79\%), „kritisch-rhetorisch" (29,75\%) und „bef{\"u}rwortend-sachlich" (7,44\%). Die Berichterstattung ist {\"u}berwiegend sachlich, wobei in 42,1\% der Artikel eine kritische Tonalit{\"a}t zu erkennen ist. Qualit{\"a}tsm{\"a}ngel treten vor allem in „kritisch-rhetorischen" Artikeln auf, w{\"a}hrend „ausgewogen-sachliche" und „kritisch-sachliche" Positionen durch faktenbasierte und gut strukturierte Darstellungen hervorstechen. Aus den Ergebnissen leitet die Studie neun Qualit{\"a}tskriterien ab, die praxisorientierte Empfehlungen f{\"u}r den wirtschaftspolitischen Journalismus bieten. Diese Untersuchung unterstreicht die Bedeutung von Ausgewogenheit, Tiefgr{\"u}ndigkeit, Vielfalt und Neutralit{\"a}t in der Berichterstattung. Zudem sind die Kriterien Anwendbarkeit, Zug{\"a}nglichkeit (einschließlich Unterhaltsamkeit), Integrit{\"a}t und Selbstkritik entscheidend f{\"u}r die Aufbereitung kontroverser und komplexer Themen.}, language = {de} }