@inproceedings{44315,
  abstract     = {{<jats:p>Abstract. Climate change, rare resources and industrial transformation processes lead to a rising demand of multi-complex lightweight forming parts, especially in aerospace and automotive sectors. In these industries, flow forming is often used to produce cylindrical forming parts by reducing the wall thickness of tubular semifinished parts, e.g. for the production of hydraulic cylinders or gear shafts. The complexity and functionality of flow forming workpieces could be significantly increased by locally graded microstructure and geometry structures. This enables customized complex hardness distributions at wear surfaces or magnetic QR codes for a unique, tamper-proof product identification. The production of those complex, 2D (axial and angular) graded forming parts currently depicts a great challenge for the process and requires new solutions and strategies. Hence, this paper proposes a novel control strategy that includes online measurements from an absolute encoder to determine the angular workpiece position. Workpieces of AISI 304L stainless steel with 2D-graded structures are successfully manufactured using this new strategy and analyzed regarding the possible accuracy and resolution of the gradation. At this point, a dependency of the gradations on the sensor and actuator dynamics, accuracy and geometry could be noted. It is further evaluated how the control strategy could be extended by an observer-based closed-loop property control approach to enhance the accuracy of the suggested strategy. </jats:p>}},
  author       = {{Kersting, Lukas and Arian, Bahman and Rozo Vasquez, Julian and Trächtler, Ansgar and Homberg, Werner and Walther, Frank}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Control strategy for angular gradations by means of the flow forming process}}},
  doi          = {{10.21741/9781644902479-220}},
  year         = {{2023}},
}

@article{44318,
  author       = {{Rozo Vasquez, Julian and Arian, Bahman and Kersting, Lukas and Walther, Frank and Homberg, Werner and Trächtler, Ansgar}},
  journal      = {{Metals}},
  title        = {{{Detection of phase transformation during plastic deformation of metastable austenitic steel AISI 304L by means of X-ray diffraction pattern analysis}}},
  year         = {{2023}},
}

@inbook{47450,
  author       = {{Rezat, Sara}},
  booktitle    = {{Die Konstruktion stärken: Ein Handlungsfeld der Deutschdidaktik neu betrachtet}},
  editor       = {{von Heynitz, Martina}},
  pages        = {{65--79}},
  publisher    = {{Peter Lang}},
  title        = {{{Konstruktionen in der prozedurenorientierten Schreibdidaktik.}}},
  year         = {{2023}},
}

@inproceedings{46067,
  abstract     = {{<p>The study investigates two different ways of guiding the addressee of an explanation - an explainee, through action demonstration: contrastive and non-contrastive. Their effect was tested on attention to specific action elements (goal) as well as on event memory. In an eye-tracking experiment, participants were shown different motion videos that were either contrastive or non-contrastive with respect to the segments of movement presentation. Given that everyday action demonstration is often multimodal, the stimuli were created with re- spect to their visual and verbal presentation. For visual presentation, a video combined two movements in a contrastive (e.g., Up-motion following a Down-motion) or non-contrastive way (e.g., two Up-motions following each other). For verbal presentation, each video was combined with a sequence of instruction descriptions in the form of negative (i.e., contrastive) or assertive (i.e., non-contrastive) guidance. It was found that a) attention to the event goal increased for this condition in the later time window, and b) participants’ recall of the event was facilitated when a visually contrastive motion was combined with a verbal contrast.</p>}},
  author       = {{Singh, Amit and Rohlfing, Katharina J.}},
  booktitle    = {{Proceedings of the Annual Meeting of the Cognitive Science Society 45 (45)}},
  keywords     = {{Attention, negation, contrastive  guidance, eye-movements, action understanding, event representation}},
  location     = {{Sydney}},
  publisher    = {{Cognitive Science Society}},
  title        = {{{Contrastiveness in the context of action demonstration: an eye-tracking study on its effects on action perception and action recall}}},
  year         = {{2023}},
}

@inproceedings{42784,
  author       = {{Homt, Martina and Wehde, Janis and Bloh, Bea}},
  location     = {{Essen}},
  title        = {{{Motivationsprofile zum Erwerb pädagogischen Wissens im Lehramtsstudium}}},
  year         = {{2023}},
}

@article{48676,
  abstract     = {{Die charakteristische Verbzweitstellung des Deutschen und die sogenannte Satzklammer führen bei der Sprachproduktion vieler Lernender zu klassischen Fehlern und Frustration. Die Herausforderung für den fremdsprachlichen A1-/A2-Unterricht besteht darin, das Phänomen der Verbstellung didaktisch so zu reduzieren, dass der Gegenstand zwar nicht unzulässig vereinfacht wird, die DaF-Lernenden aber ein leicht handhabbares Modell für die Sprachproduktion zur Verfügung haben, das sie auch ohne umfassende linguistische Vorkenntnisse nutzen können. Im vorliegenden Beitrag werden wir zeigen, wie eine Vermittlung dieses grammatischen Inhalts durch Metaphorisierung und Visualisierung gelingen kann. Dazu untersuchen wir gängige Metaphern, die in Lehrmaterial für A1-/A2-Niveau zur Einführung der Verbzweitstellung und der Klammerstruktur verwendet werden, und geben einen Überblick über die dort eingesetzten Visualisierungen, deren didaktischen Nutzen wir anhand eines von uns erstellten Kriterienkatalogs analysieren. Hierzu fassen wir syntaktische Modelle wie das Feldermodell, die Dependenz- und die Valenztheorie im
Kontext unseres Interesses zusammen. Ziel unserer Untersuchung ist es, brauchbare und ausbaufähige Modelle zu identifizieren.}},
  author       = {{Lentfort, Theresa and Mentchen, Silke}},
  journal      = {{GfL}},
  keywords     = {{A1-/A2-Unterricht, Verbstellung, Satzklammer, Metapher, Visualisierung, Lerntheorie, Kognitive Linguistik, Lehrmaterial}},
  number       = {{2}},
  pages        = {{72 -- 97}},
  title        = {{{Show me the verb: Visualisierung von Wortstellungsregeln im DaF-Unterricht für die Grundstufe}}},
  year         = {{2023}},
}

@inproceedings{34171,
  abstract     = {{State estimation when only a partial model of a considered system is available remains a major challenge in many engineering fields. This work proposes a joint, square-root unscented Kalman filter to estimate states and model uncertainties simultaneously by linear combinations of physics-motivated library functions. Using a sparsity promoting approach, a selection of those linear combinations is chosen and thus an interpretable model can be extracted. Results indicate a small estimation error compared to a traditional square-root unscented Kalman filter and exhibit the enhancement of physically meaningful models.}},
  author       = {{Götte, Ricarda-Samantha and Timmermann, Julia}},
  booktitle    = {{12th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2022)}},
  keywords     = {{joint estimation, unscented transform, Kalman filter, sparsity, data-driven, compressed sensing}},
  location     = {{Canberra, Australien}},
  number       = {{1}},
  pages        = {{85--90}},
  title        = {{{Estimating States and Model Uncertainties Jointly by a Sparsity Promoting UKF}}},
  doi          = {{https://doi.org/10.1016/j.ifacol.2023.02.015}},
  volume       = {{56}},
  year         = {{2023}},
}

@inproceedings{44326,
  abstract     = {{Low-quality models that miss relevant dynamics lead to major challenges in modelbased
state estimation. We address this issue by simultaneously estimating the system’s states
and its model inaccuracies by a square root unscented Kalman filter (SRUKF). Concretely,
we augment the state with the parameter vector of a linear combination containing suitable
functions that approximate the lacking dynamics. Presuming that only a few dynamical terms
are relevant, the parameter vector is claimed to be sparse. In Bayesian setting, properties like
sparsity are expressed by a prior distribution. One common choice for sparsity is a Laplace
distribution. However, due to disadvantages of a Laplacian prior in regards to the SRUKF,
the regularized horseshoe distribution, a Gaussian that approximately features sparsity, is
applied instead. Results exhibit small estimation errors with model improvements detected by
an automated model reduction technique.}},
  author       = {{Götte, Ricarda-Samantha and Timmermann, Julia}},
  booktitle    = {{IFAC-PapersOnLine}},
  keywords     = {{joint estimation, unscented Kalman filter, sparsity, Laplacian prior, regularized horseshoe, principal component analysis}},
  location     = {{Yokohama, Japan}},
  number       = {{2}},
  pages        = {{869--874}},
  title        = {{{Approximating a Laplacian Prior for Joint State and Model Estimation within an UKF}}},
  volume       = {{56}},
  year         = {{2023}},
}

@inproceedings{48482,
  author       = {{Götte, Ricarda-Samantha and Klusmann, Jo Noel and Timmermann, Julia}},
  booktitle    = {{Proceedings - 33. Workshop Computational Intelligence: Berlin, 23.-24. November 2023}},
  location     = {{Berlin, Germany}},
  pages        = {{113--123}},
  title        = {{{Data-driven identification of disturbances using a sliding mode observer}}},
  doi          = {{10.5445/KSP/1000162754}},
  year         = {{2023}},
}

@inproceedings{48476,
  author       = {{Hesse, Michael and Timmermann, Julia and Trächtler, Ansgar}},
  booktitle    = {{2023 European Control Conference (ECC)}},
  publisher    = {{IEEE}},
  title        = {{{Hybrid Optimal Control for Dynamical Systems using Gaussian Process Regression and Unscented Transform<sup>*</sup>}}},
  doi          = {{10.23919/ecc57647.2023.10178368}},
  year         = {{2023}},
}

@article{50070,
  author       = {{Junker, Annika and Pape, Keno Egon Friedrich and Timmermann, Julia and Trächtler, Ansgar}},
  issn         = {{2405-8963}},
  journal      = {{IFAC-PapersOnLine}},
  keywords     = {{General Medicine}},
  number       = {{3}},
  pages        = {{625--630}},
  publisher    = {{Elsevier BV}},
  title        = {{{Adaptive Koopman-Based Models for Holistic Controller and Observer Design}}},
  doi          = {{10.1016/j.ifacol.2023.12.094}},
  volume       = {{56}},
  year         = {{2023}},
}

@article{40607,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Teachers’ in-depth diagnostic thinking has been shown to be crucial for student-centered teaching as they need to perceive and interpret students’ understanding for well-informed decision-making on adaptive teaching practices. The paper presents a content-related approach to analyzing diagnostic thinking processes with respect to the mathematical knowledge elements that prospective teachers identify as students’ resources and obstacles. Prospective teachers’ challenge is that some relevant knowledge elements first have to be unpacked, because compact concepts (such as the place value concept) or procedures (such as for multi-digit multiplication) comprise several smaller knowledge elements (such as the positional property) that have to be made explicit for students to foster their learning processes adequately. Our study examines what knowledge elements prospective teachers perceive and interpret in a transcript vignettes on multi-digit multiplication (of decimal and natural numbers) and its underlying basic arithmetic concepts (place value understanding and meaning of multiplication) in written diagnostic judgments on students’ resources and obstacles (<jats:italic>N</jats:italic> = 196). A comparative design within the vignette is used to investigate how far the process of perceiving can be supported by thematic cues. The analysis reveals that those knowledge elements cued in the vignette by being already unpacked and explicitly addressed are perceived and interpreted more often (but with lower correctness) than those that are uncued and therefore have to be unpacked by the prospective teachers themselves. This confirms the need to prepare prospective teachers for unpacking mathematical concepts themselves.</jats:p>}},
  author       = {{Dröse, Jennifer and Prediger, Susanne}},
  issn         = {{0173-5322}},
  journal      = {{Journal für Mathematik-Didaktik}},
  keywords     = {{Education, General Mathematics}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Prospective Teachers’ Diagnostic Thinking on Students’ Understanding of Multi-Digit Multiplication: A Content-Related Analysis on Unpacking of Knowledge Elements}}},
  doi          = {{10.1007/s13138-022-00214-w}},
  year         = {{2023}},
}

@article{45374,
  author       = {{Prediger, S. and Dröse, Jennifer and Stahnke, R. and Ademmer, C.}},
  journal      = {{Journal of Mathematics Teacher Education}},
  title        = {{{Teacher expertise for fostering at-risk students’ understanding of basic concepts: conceptual model and evidence for growth}}},
  doi          = {{https://doi.org/10.1007/s10857-022-09538-3}},
  year         = {{2023}},
}

@article{35831,
  abstract     = {{Videografien eigenen Unterrichts sind ein mögliches methodisches Werkzeug zur Förderung der professionellen Kompetenz angehender Lehrkräfte, das allerdings innerhalb der Lehramtsausbildung noch nicht breit implementiert
ist. Ein möglicher Grund hierfür könnte neben organisatorischen Herausforderungen auch in einer geringen Akzeptanz von Eigenvideografien durch Lehramtsstudierende liegen. Um besser abschätzen zu können, mit welchen Voraussetzungen affektiv-emotionaler Art bei einer breiteren Implementierung im Lehramtsstudium gerechnet werden kann, wurden N = 938 Lehramtsstudierende im Masterstudium an der Universität Paderborn zu ihren Emotionen und Bereitschaften zur Arbeit mit Eigenvideografien befragt. Dabei wurde auch erfasst, wie sich diese je nach bestehenden
Erfahrungen zur Arbeit mit Videografien unterscheiden. In den Ergebnissen zeigen sich kaum affektiv-emotionale Reaktionen zur Eigenvideografie, und wenn, vor allem Gefühle der Unsicherheit. Zu beachten ist, dass zwar bei gut der Hälfte der Studierenden eine eher hohe generelle Bereitschaft zur Eigenvideografie besteht, eine konkrete Intention bzw. eine konkrete Volition zur Videografie aber geringer ist. Die ca. 10 % der Studierenden mit Eigenvideografieerfahrung im Studium zeigen erwartungsgemäß höhere Bereitschaften, aber unerwartet keine signifikant positiveren Emotionen. Insgesamt verdeutlichen die Ergebnisse, dass bzgl. der Akzeptanz der Studierenden ein höheres Potenzial zur Implementation von Eigenvideografien im Studium vorliegt, als aktuell ausgeschöpft wird.}},
  author       = {{Vogelsang, Christoph and Pollmeier, Pascal and Gockeln, Theresa and Rogge, Tim}},
  journal      = {{Zeitschrift für Bildungsforschung}},
  keywords     = {{Lehrerbildung, Videografie, Praxissemester, Emotionen, Akzeptanz}},
  pages        = {{7--31}},
  publisher    = {{Springer}},
  title        = {{{Zu unangenehm, zu viel Aufwand oder keine Möglichkeit? – Emotionen und Bereitschaft von Lehramtsstudierenden zur Videografie eigenen Unterrichts}}},
  doi          = {{10.1007/s35834-022-00378-y}},
  volume       = {{13}},
  year         = {{2023}},
}

@inbook{52614,
  author       = {{Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}},
  booktitle    = {{Lecture Notes in Mechanical Engineering}},
  isbn         = {{9783031413407}},
  issn         = {{2195-4356}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Numerical Investigation of the Coupled Friction Behavior in the Clinching Process Chain}}},
  doi          = {{10.1007/978-3-031-41341-4_15}},
  year         = {{2023}},
}

@article{54795,
  author       = {{Hälterlein, Jens}},
  journal      = {{Digital Culture & Society}},
  number       = {{2}},
  pages        = {{161--179}},
  title        = {{{Conflicting Values in Epidemiological Modelling, Simulation and Dashboard-Design. A Contribution to the Analysis of the Epistemisation of Pandemic Politics}}},
  volume       = {{9}},
  year         = {{2023}},
}

@inbook{58404,
  abstract     = {{Der Artikel untersucht die kulturtheoretische Grundlage eines literaturwissenschaftlichen Zugangs zu Weltliteratur. Dabei setzt er sich mit Theorien des Inter- und Transkulturellem auseinander und macht mit dem methodischen Zugriff des "Doppeltblickens" einen Vorschlag, wie eine interkulturelle Methode vor dem Hintergrund eines komplexen Kulturbegriffs ohne Essentialisierungen gelingen kann.}},
  author       = {{Schulte Eickholt, Swen}},
  booktitle    = {{Der Neue Weltengarten 2022. Jahrbuch für Literatur und Interkulturalität}},
  editor       = {{Schulte Eickholt, Swen and Hofmann, Michael }},
  isbn         = {{978-3-86525-983-7}},
  pages        = {{43--76}},
  publisher    = {{Wehrhahn}},
  title        = {{{National, global oder irgendwo dazwischen? Methodische Zugänge zur (neuen) Weltliteratur aus germanistischer Perspektive}}},
  year         = {{2023}},
}

@article{46494,
  abstract     = {{To improve the mechanical performance and to address current shortcomings of adhesive bonds such as bond degradation due to aging, a pulsed laser surface pretreatment of the metal surfaces of aluminum AW 6082-T6 joints with epoxy adhesive E320 is investigated. The surface treatment of the specimens resulted in increased single-lap shear (SLS) strengths before and after hydrothermal aging in 80°C hot water compared to nonpretreated reference specimens. In order to reveal the correlations of laser parameters, resulting surface morphologies and the SLS strength, differently laser pretreated surfaces were characterized at the micro- and nanoscale using optical and scanning electron microscopies. The surface enlargement was quantified with a digital image analysis of cross-sections prepared from the joint interfaces. An analysis of variances (ANOVA) of the SLS results indicated that the laser parameters power and pulse frequency were most critical for obtaining high SLS strengths. Pretreated joint surfaces with a high micro- and nano-surface enlargement and deep solidification structures provide high SLS strengths of up to 50 MPa and almost negligible aging losses of merely 4%. Undercut structures on the pretreated surfaces were found to be beneficial for the mechanical and aging properties when only limited micro- and nanostructuring was applied.}},
  author       = {{Freund, Jonathan and Löbbecke, Miriam and Delp, Alexander and Walther, Frank and Wu, Shuang and Tröster, Thomas and Haubrich, Jan}},
  issn         = {{0021-8464}},
  journal      = {{The Journal of Adhesion}},
  keywords     = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}},
  pages        = {{1--31}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints}}},
  doi          = {{10.1080/00218464.2023.2223475}},
  year         = {{2023}},
}

@article{55760,
  abstract     = {{The transferability of structure–property relationships for laser-pretreated metal adhesive joints to laser-pretreated metal–carbon-fiber-reinforced plastic (CFRP) bonds was investigated. Single-lap shear tests were performed on hybrid AW 6082-T6–CFRP specimens pretreated with the same pulsed laser surface parameter sets on the metal surface as previously tested, AW 6082-T6–E320 metal adhesive joints. The fracture surfaces were characterized to determine the type of failure and elucidate differences and commonalities in the link between surface structures and single-lap shear strengths. Digital image analyses of the hybrid specimens’ fractured surfaces were used to quantify remaining CFRP fragments on the metallic joint side. The results indicate that high surface enlargements and the presence of undercut structures lead to single-lap shear strengths exceeding 40 MPa and 35 MPa for unaged and aged hybrid specimens, respectively. Whereas for the metal–polymer joints, the trend from high strength to weakly bonded specimens is largely continuous with the degree of surface structuring, hybrid metal–CFRP joints exhibit a drastic drop in joint performance after aging if the laser-generated surface structures are less pronounced with low surface enlargements and crater depths. Surface features and hydrothermal aging determine whether the specimens fail cohesively or adhesively.</jats:p>}},
  author       = {{Freund, Jonathan and Lützenkirchen, Isabel and Löbbecke, Miriam and Delp, Alexander and Walther, Frank and Wu, Shuang and Tröster, Thomas and Haubrich, Jan}},
  issn         = {{2504-477X}},
  journal      = {{Journal of Composites Science}},
  number       = {{10}},
  publisher    = {{MDPI AG}},
  title        = {{{Transferability of the Structure–Property Relationships from Laser-Pretreated Metal–Polymer Joints to Aluminum–CFRP Hybrid Joints}}},
  doi          = {{10.3390/jcs7100427}},
  volume       = {{7}},
  year         = {{2023}},
}

@article{46495,
  abstract     = {{A parameter investigation for manufacturing a hybrid system through the prepreg pressing process was carried out within the scope of this work to achieve optimal adhesion properties. The hybrid specimen comprises an aluminium sheet of alloy EN AW 6082 in T6 condition and a thermoset Carbon Fibre Reinforced Plastics prepreg. The prepreg pressing process allows the curing reaction of epoxy resin and the joining process to occur simultaneously to avoid an additional bonding process step. The surface of the aluminium sheet was pretreated in advance using a pulsed Nd:YAG laser to enhance the bonding properties. In the first step, the shear edge tests investigated the adhesion properties achieved with different consolidation (temperature, time and pressure) and laser parameters. Then, 3-point bending tests were carried out to investigate the influence of the consolidation parameters on the mechanical properties of the Carbon Fibre Reinforced Plastics-laminate. In this way, the optimal parameter sets for manufacturing hybrid structures were determined.}},
  author       = {{Wu, Shuang and Delp, Alexander and Freund, Jonathan and Walther, Frank and Haubrich, Jan and Löbbecke, Miriam and Tröster, Thomas}},
  issn         = {{0021-8464}},
  journal      = {{The Journal of Adhesion}},
  keywords     = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}},
  pages        = {{1--29}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Adhesion properties of the hybrid system made of laser-structured aluminium EN AW 6082 and CFRP by co-bonding-pressing process}}},
  doi          = {{10.1080/00218464.2023.2245758}},
  year         = {{2023}},
}