@inproceedings{55403,
  abstract     = {{In this paper we consider the interactive processes by which an explainer and an explainee cooperate to produce an explanation, which we refer to as co-construction. Explainable Artificial Intelligence (XAI) is concerned with the development of intelligent systems and robots that can explain and justify their actions, decisions, recommendations, and so on. However, the cooperative construction of explanations remains a key but under-explored issue. This short paper proposes an architecture for intelligent systems that promotes a co-constructive and interactive approach to explanation generation. By outlining its basic components and their specific roles, we aim to contribute to the advancement of XAI computational frameworks that actively engage users in the explanation process.}},
  author       = {{Buschmeier, Hendrik and Cimiano, Philipp and Kopp, Stefan and Kornowicz, Jaroslaw and Lammert, Olesja and Matarese, Marco and Mindlin, Dimitry and Robrecht, Amelie Sophie and Vollmer, Anna-Lisa and Wagner, Petra and Wrede, Britta and Booshehri, Meisam}},
  booktitle    = {{Proceedings of the 2024 Workshop on Explainability Engineering}},
  location     = {{Lisbon, Portugal}},
  pages        = {{20--25}},
  publisher    = {{ACM}},
  title        = {{{Towards a Computational Architecture for Co-Constructive Explainable Systems}}},
  doi          = {{10.1145/3648505.3648509}},
  year         = {{2024}},
}

@article{59132,
  author       = {{Moritzer, Elmar and Beutelspacher, Jonas and Elsner, Christian Lennart}},
  journal      = {{Polymer Composites}},
  keywords     = {{Filled polymers, Fused Filament Fabrication, weld seam quality, weld seam strength}},
  title        = {{{Investigation of the weld seam quality of particle filled polymers in the fused filament fabrication process}}},
  doi          = {{10.1002/pc.29101}},
  year         = {{2024}},
}

@article{59135,
  abstract     = {{Compounding is an important step in processing base polymers and is used to incorporate various additives into a polymer. For this purpose, different screw elements are used for dispersive and distributive mixing on a co-rotating twin-screw extruder. Optimising the screw configuration requires precise knowledge of the screw elements’ mixing properties, which have not been thoroughly investigated. This study analyses the mixing behaviour of individual screw elements regarding dispersive and distributive mixing using 3D CFD flow simulations with subsequent particle tracking. For distributive mixing, the particle distribution behind the screw elements in the XY plane is analysed and the mixing index MQ, which relates the standard deviation and the mean value of the triangular areas between the particles, is calculated. For dispersive mixing, the maximum shear stress on the particle path and the integral of the shear stress over the residence time of each individual particle are determined. The results show that screw element geometry and rotation speed have a significant influence on dispersive and distributive mixing. In addition, better dispersive mixing is achievable with highly viscous materials. These findings enable the optimisation of the mixing zone of a co-rotating twin-screw extruder for the efficient mixing of mineral fillers.}},
  author       = {{Oldemeier, Jan Philipp and Schöppner, Volker}},
  journal      = {{Polymers}},
  keywords     = {{Compoundieren, disperses Mischen, distributives Mischen, Schneckenelemente}},
  number       = {{21}},
  title        = {{{Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle Tracking}}},
  doi          = {{10.3390/polym16212952}},
  volume       = {{16}},
  year         = {{2024}},
}

@inproceedings{59101,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  booktitle    = {{The 2nd International Symposium on Plastics Technology}},
  editor       = {{Proceedings, AIP-Conference}},
  isbn         = {{9780735448452}},
  publisher    = {{{AIP Publishing}}},
  title        = {{{Development of scale-up rules for the quasi-simultaneous laser transmission welding (LTW) of thermoplastics}}},
  volume       = {{355}},
  year         = {{2024}},
}

@article{59129,
  author       = {{Schöppner, Volker and Trienens, Dorte and Bäck, Thomas and Tsi-Nda Lontsi, Seraphin and Krause, Peter and Budde, Finn}},
  journal      = {{Polymers}},
  number       = {{9}},
  pages        = {{1197}},
  title        = {{{Method Development for the Prediction of Melt Quality in the Extrusion Process}}},
  doi          = {{10.3390/polym16091197}},
  volume       = {{16}},
  year         = {{2024}},
}

@article{59134,
  author       = {{Austermeier, Laura and Schöppner, Volker}},
  journal      = {{37th International Conference of the Polymer Processing Society}},
  keywords     = {{Compoundieren, Doppelschneckenextruder, Drehmoment, Energieeintrag, Feststoffförderung, Schneckenelemente}},
  title        = {{{Load Differences between the Screws in the Solids Conveying Zone of Co-Rotating Twin-Screw Extruders}}},
  year         = {{2024}},
}

@article{59103,
  author       = {{Gevers, Karina and Schöppner, Volker and Seefried, A. and Gehde, M. and Albrecht, M.}},
  journal      = {{Joining Plastics}},
  number       = {{2}},
  pages        = {{108}},
  title        = {{{Influences of the convective heating on the material damage to plastics during hot gas series welding}}},
  volume       = {{18}},
  year         = {{2024}},
}

@article{59105,
  author       = {{Gevers, Karina and Schöppner, Volker and Schraa, L. and Toews, P. and Decker, J. and Uhlig, K. and Stommel, Michael}},
  journal      = {{Welding in the World}},
  title        = {{{Effects of different heating strategies on the joint properties during infrared welding of glass fiber reinforced polyamide 6}}},
  year         = {{2024}},
}

@article{59133,
  author       = {{Austermeier, Laura and Schöppner, Volker}},
  journal      = {{Book of Abstracts of the 5th Aspherix(R) & CFDEM(R) Conference}},
  keywords     = {{Compoundieren, Doppelschneckenextruder, Drehmoment, Energieeintrag}},
  publisher    = {{ DCS Computing GmbH, TU Graz Institut für Prozess- und Partikeltechnik}},
  title        = {{{The Potential of DEM Simulation for the Prediction of Torque Differences in the Melting Zone of Co-rotating Twin-Screw Extruders}}},
  doi          = {{10.3217/978-3-99161-020-5}},
  year         = {{2024}},
}

@inproceedings{59123,
  author       = {{Brüning, Florian and Landgräber, Jan}},
  booktitle    = {{Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2024)}},
  keywords     = {{extrusion, Feststoffförderung, Reibwerte, Spritzgießen}},
  title        = {{{Material and process effects on the tribological behavior of polymer bulk materials}}},
  year         = {{2024}},
}

@inproceedings{59128,
  author       = {{Brüning, Florian and Schmidt, Leon}},
  booktitle    = {{20. Kautschuk-Herbstkolloquium (KHK)}},
  editor       = {{Institut für Kautschuktechnologie e.V., Deutsches}},
  keywords     = {{extrusion, Kautschuk, Simulation}},
  title        = {{{Investigation of alternative screw concepts for rubber extrusion}}},
  year         = {{2024}},
}

@article{59104,
  author       = {{Gevers, Karina and Schöppner, Volker and Albrecht, M. and Gehde, Michael and Seefried, A.}},
  journal      = {{Joining Plastics}},
  pages        = {{108--114}},
  title        = {{{Einfluss der konvektiven Erwärmung auf die Materialschädigung von Kunststoffen beim Warmgasserienschweißen}}},
  year         = {{2024}},
}

@inproceedings{59122,
  author       = {{Brüning, Florian and Kleinschmidt, Dennis and Petzke, Jonas Dirk Rudolf Helmut}},
  booktitle    = {{39th International Conference of the Polymer Processing Society}},
  keywords     = {{Rheologie, Viskosität, Wandgleiten}},
  title        = {{{Improvement of an alternative method for the correction of wall slip effects in rheological studies of filled rubber compounds}}},
  year         = {{2024}},
}

@inproceedings{59126,
  author       = {{Petzke, Jonas Dirk Rudolf Helmut and Brüning, Florian and Kleinschmidt, Dennis}},
  booktitle    = {{39th International Conference of the Polymer Processing Society}},
  keywords     = {{Kautschuk, Mikrowelle, Simulation, Vulkanisation}},
  title        = {{{Simulative Approach for Predicting the Heating Behavior of Elastomers in the Solid-State Microwave Heating Process}}},
  year         = {{2024}},
}

@article{59243,
  abstract     = {{Most single-screw extruders used in the plastics processing industry are plasticizing extruders, designed to melt solid pellets or powders within the screw channel during processing. In many cases, the efficiency of the melting process acts as the primary throughput-limiting factor. If the material melts too late in the process, it may not be sufficiently mixed, resulting in substandard product quality. Accurate prediction of the melting process is therefore essential for efficient and cost-effective machine design. A practical method for engineers is the modeling of the melting process using mathematical–physical models that can be solved without complex numerical methods. These models enable rapid calculations while still providing sufficient predictive accuracy. This study revisits the modified Tadmor model by Potente, which describes the melting process and predicts the delay-zone length, extending from the hopper front edge to the point of melt pool formation. Based on extensive experimental investigations, this model is adapted by redefining the flow temperatures at the phase boundary and accounting for surface porosity at the beginning of the melting zone. Additionally, the effect of variable solid bed dynamics on model accuracy is examined. Significant model improvements were achieved by accounting for reduced heat flow into the solid bed due to the porous surface structure in the solid conveying zone, along with a new assumption for the flow temperature at the phase boundary between the solid bed and melt film.}},
  author       = {{Schöppner, Volker and Brüning, Florian and Knaup, Felix}},
  journal      = {{Polymers}},
  keywords     = {{delay zone, extrusion, melting modeling}},
  number       = {{22}},
  pages        = {{3130}},
  title        = {{{Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders}}},
  doi          = {{10.3390/polym16223130}},
  volume       = {{16}},
  year         = {{2024}},
}

@article{59269,
  abstract     = {{Ferroelectric materials play a crucial role in a broad range of technologies due to their unique properties that are deeply connected to the pattern and behavior of their ferroelectric (FE) domains. Chief among them, barium titanate (BaTiO3; BTO) sees widespread applications such as in electronics but equally is a ferroelectric model system for fundamental research, e.g., to study the interplay of such FE domains, the domain walls (DWs), and their macroscopic properties, owed to BTO’s multiple and experimentally accessible phase transitions. Here, we employ Second Harmonic Generation Microscopy (SHGM) to in situ investigate the cubic-to-tetragonal (at ∼126°C) and the tetragonal-to-orthorhombic (at ∼5°C) phase transition in single-crystalline BTO via three-dimensional (3D) DW mapping. We demonstrate that SHGM imaging provides the direct visualization of FE domain switching as well as the domain dynamics in 3D, shedding light on the interplay of the domain structure and phase transition. These results allow us to extract the different transition temperatures locally, to unveil the hysteresis behavior, and to determine the type of phase transition at play (first/second order) from the recorded SHGM data. The capabilities of SHGM in uncovering these crucial phenomena can easily be applied to other ferroelectrics to provide new possibilities for in situ engineering of advanced ferroic devices.}},
  author       = {{Kirbus, Benjamin and Seddon, Samuel D. and Kiseleva, Iuliia and Beyreuther, Elke and Rüsing, Michael and Eng, Lukas M.}},
  issn         = {{0021-8979}},
  journal      = {{Journal of Applied Physics}},
  number       = {{15}},
  publisher    = {{AIP Publishing}},
  title        = {{{Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy}}},
  doi          = {{10.1063/5.0237769}},
  volume       = {{136}},
  year         = {{2024}},
}

@article{59270,
  abstract     = {{Lithium niobate tantalate (LiNb1−xTaxO3, LNT) solid solutions offer exciting new possibilities for applications ranging from optics, piezotronics, and electronics beyond the capabilities of the widely used singular compounds of lithium niobate (LiNbO3, LN) or lithium tantalate (LiTaO3, LT). Crystal growth of homogeneous LNT single crystals by the Czochralski method is still challenging. One key aspect of homogeneous growth is the accurate knowledge of thermal conductivity through the crystal boule during the growth, which is central to control the crystal growth. Therefore, the temperature dependent thermal conductivity of pure LN, LT, and LNT solid solutions, as well as of selected doped LN and LT crystals (Mg, Zn) was investigated across the temperature range from 300 to 1300 K. The results that span across the whole composition range can directly be applied for optimizing growth conditions of both LNT solid solutions as well as doped and undoped LN and LT crystals.}},
  author       = {{Bashir, Umar and Rüsing, Michael and Klimm, Detlef and Blukis, Roberts and Koppitz, Boris and Eng, Lukas M. and Bickermann, Matthias and Ganschow, Steffen}},
  issn         = {{0925-8388}},
  journal      = {{Journal of Alloys and Compounds}},
  publisher    = {{Elsevier BV}},
  title        = {{{Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K}}},
  doi          = {{10.1016/j.jallcom.2024.176549}},
  volume       = {{1008}},
  year         = {{2024}},
}

@article{59273,
  abstract     = {{Ferroelectric domain walls (DWs) are promising structures for assembling future nano-electronic circuit elements on a larger scale since reporting domain wall currents of up to 1 mA per single DW. One key requirement hereto is their reproducible manufacturing by gaining preparative control over domain size and domain wall conductivity (DWC). To date, most works on DWC have focused on exploring the fundamental electrical properties of individual DWs within single-shot experiments, with an emphasis on quantifying the origins of DWC. Very few reports exist when it comes to comparing the DWC properties between two separate DWs, and literally nothing exists where issues of reproducibility in DWC devices have been addressed. To fill this gap while facing the challenge of finding guidelines for achieving predictable DWC performance, we report on a procedure that allows us to reproducibly prepare single hexagonal domains of a predefined diameter into uniaxial ferroelectric lithium niobate single crystals of 200 and 300 μm thickness, respectively. We show that the domain diameter can be controlled with an uncertainty of a few percent. As-grown DWs are then subjected to a standard procedure of current-limited high-voltage DWC enhancement, and they repetitively reach a DWC increase of six orders of magnitude. While all resulting DWs show significantly enhanced DWC values, their individual current–voltage (I–V) characteristics exhibit different shapes, which can be explained by variations in their 3D real structure reflecting local heterogeneities by defects, DW pinning, and surface-near DW inclination.}},
  author       = {{Ratzenberger, Julius and Kiseleva, Iuliia and Koppitz, Boris and Beyreuther, Elke and Zahn, Manuel and Gössel, Joshua and Hegarty, Peter A. and Amber, Zeeshan H. and Rüsing, Michael and Eng, Lukas M.}},
  issn         = {{0021-8979}},
  journal      = {{Journal of Applied Physics}},
  number       = {{10}},
  pages        = {{104302}},
  publisher    = {{AIP Publishing}},
  title        = {{{Toward the reproducible fabrication of conductive ferroelectric domain walls into lithium niobate bulk single crystals}}},
  doi          = {{10.1063/5.0219300}},
  volume       = {{136}},
  year         = {{2024}},
}

@article{59275,
  abstract     = {{Studying and understanding many‐body interactions, particularly electron‐boson interactions, is essential for a deeper elucidation of fundamental physical phenomena and the development of novel material functionalities. Here, this aspect is explored in the weak itinerant ferromagnet LaCo2P2 by means of momentum‐resolved photoelectron spectroscopy (ARPES) and first‐principles calculations. The detailed ARPES patterns enable to unveil bulk and surface bands, spin splittings due to Rashba and exchange interactions, as well as the evolution of bands with temperature, which altogether creates a solid foundation for theoretical studies. The latter has allowed to establish the impact of electron‐boson interactions on the electronic structure, that are reflected in its strong renormalization driven by electron‐magnon interaction and the emergence of distinctive kinks of surface and bulk electron bands due to significant electron‐phonon coupling. Our results highlight the distinct impact of electron‐boson interactions on the electronic structure, particularly on the itinerant d states. Similar electronic states are observed in the isostructural iron pnictides, where electron‐boson interactions play a crucial role in the emergence of superconductivity. It is believed that further studies of material systems involving both magnetically active d‐ and f‐sublattices will reveal more advanced phenomena in the bulk and at distinct surfaces, driven by a combination of factors including Rashba and Kondo effects, exchange magnetism, and electron‐boson interactions.}},
  author       = {{Usachov, D. Yu. and Ali, K. and Poelchen, G. and Mende, M. and Schulz, S. and Peters, M. and Bokai, K. and Sklyadneva, I. Yu. and Stolyarov, V. and Chulkov, E. V. and Kliemt, K. and Paischer, S. and Buczek, P. A. and Heid, R. and Hempel, F. and Rüsing, Michael and Ernst, A. and Krellner, C. and Eremeev, S. V. and Vyalikh, D. V.}},
  issn         = {{2751-1200}},
  journal      = {{Advanced Physics Research}},
  publisher    = {{Wiley}},
  title        = {{{Unveiling Electron‐Phonon and Electron‐Magnon Interactions in the Weak Itinerant Ferromagnet LaCo2P2}}},
  doi          = {{10.1002/apxr.202400137}},
  year         = {{2024}},
}

@article{54967,
  abstract     = {{<jats:p>Ferroelectric domain wall conductivity (DWC) is an intriguing and promising functional property that can be elegantly controlled and steered through a variety of external stimuli such as electric and mechanical fields. Optical-field control, as a noninvasive and flexible tool, has rarely been applied so far, but it significantly expands the possibility for both tuning and probing DWC. On the one hand, as known from second-harmonic or Raman micro-spectroscopy, the optical approach provides information on DW distribution and inclination, while simultaneously probing the DW vibrational modes; on the other hand, photons might be applied to directly generate charge carriers, thereby acting as a functional and spectrally tunable probe to deduce the local absorption properties and bandgaps of conductive DWs. Here, we report on investigating the photo-induced DWC (PI-DWC) of three lithium niobate crystals, containing a very different number of DWs, namely: (A) none, (B) one, and (C) many conductive DWs. All three samples are inspected for their current–voltage behavior in darkness and for different illumination wavelengths swept from 500 nm down to 310 nm. All samples show their maximum PI-DWC at 310 nm; moreover, sample (C) reaches PI-DWCs of several microampere. Interestingly, a noticeable PI-DWC is also observed for sub-bandgap illumination, hinting toward the existence and decisive role of electronic in-gap states that contribute to the electronic charge transport along DWs. Finally, complementary conductive atomic force microscopy investigations under illumination proved that the PI-DWC indeed is confined to the DW area and does not originate from photo-induced bulk conductivity.</jats:p>}},
  author       = {{Ding, L. L. and Beyreuther, E. and Koppitz, B. and Kempf, K. and Ren, J. H. and Chen, W. J. and Rüsing, Michael and Zheng, Y. and Eng, L. M.}},
  issn         = {{0003-6951}},
  journal      = {{Applied Physics Letters}},
  number       = {{25}},
  publisher    = {{AIP Publishing}},
  title        = {{{Comparative study of photo-induced electronic transport along ferroelectric domain walls in lithium niobate single crystals}}},
  doi          = {{10.1063/5.0205877}},
  volume       = {{124}},
  year         = {{2024}},
}